JP7742585B2 - Notification system, notification method, program and management system - Google Patents

Description

This disclosure relates generally to notification systems, notification methods, programs, and management systems, and more particularly to notification systems, notification methods, programs, and management systems that notify users of the risk of infectious diseases.

A system that notifies people of the risk of infectious diseases is known (see Patent Document 1).

The information processing system described in Patent Document 1 has a management server. The management server manages the history of which mobile devices have been detected using the Bluetooth (registered trademark) communication search function of the mobile devices carried by each user. If it is determined that the user of a certain mobile device has an infectious disease such as a new strain of influenza, the management server identifies users who have been nearby, i.e., who may be infected with the same infectious disease, based on the search results history of the user's mobile device. The management server notifies the mobile devices of the identified users that they may be infected with the infectious disease.

In Patent Document 1, if it is discovered that a mobile device user has an infectious disease such as a new strain of influenza, the management server notifies users who have been near that user in the past. In other words, the user can know the risk of infection due to being near a specific user who has an infectious disease, but cannot know the risk of infection in a specific location (specified area) regardless of whether or not a user with an infectious disease is present.

JP 2010-277452 A

This disclosure has been made in consideration of the above-mentioned problems and aims to provide a notification system, notification method, program, and management system that allow users to be aware of the risk of infectious diseases in specific locations.

A notification system according to one aspect of the present disclosure includes an acquisition unit, a first determination unit, a second determination unit, and a notification unit. When a scanner installed in a predetermined area in a space provided within a facility receives signals from multiple tags carried by multiple users present within the predetermined area, the acquisition unit acquires multiple pieces of user detection information corresponding to the multiple users from the scanner. The first determination unit determines the density of the multiple users within the predetermined area using congestion-related information related to the density of the multiple users within the predetermined area, the congestion-related information being information based on the positions of the multiple users obtained from the multiple user detection information. The second determination unit determines the continuous stay time of each of the multiple users within the predetermined area obtained from the multiple user detection information. The notification unit notifies an infectious disease risk assessment for the predetermined area, which is based on at least the determination results of the first determination unit and the second determination unit . The first determination unit acquires the number of users within the predetermined area based on the acquired multiple user detection information. The congestion-related information includes an allocated area per person relative to the floor area in the specified range, which is a result of dividing the floor area in the specified range by the number of people. The first determination unit has an allocated area determination unit that determines whether the specified range is in a crowded state based on the allocated area as a determination regarding the degree of congestion. The allocated area determination unit determines that the state in the specified range is in a crowded state if the allocated area is equal to or less than a predetermined value. The notification unit notifies the risk assessment according to a combination of the determination result of the allocated area determination unit and the determination result of the second determination unit.

A notification method according to one aspect of the present disclosure includes an acquisition step, a first determination step, a second determination step, and a notification step. In the acquisition step, when a scanner installed in a predetermined area in a space installed in a facility receives signals from multiple tags carried by multiple users present within the predetermined area, the scanner acquires multiple pieces of user detection information corresponding to the multiple users. In the first determination step, a determination is made regarding the density of the multiple users within the predetermined area using congestion-related information related to the density of the multiple users within the predetermined area, the congestion-related information being information based on the positions of the multiple users obtained from the multiple user detection information. In the second determination step, a determination is made regarding the continuous stay time of each of the multiple users within the predetermined area, obtained from the multiple user detection information. In the notification step, an infectious disease risk assessment for the predetermined area is notified based on at least the determination results of the first determination step and the second determination step. In the first determination step, the number of users within the predetermined area is acquired based on the acquired multiple user detection information. The congestion-related information includes an allocated area per person relative to the floor area in the specified range, which is the result of dividing the floor area in the specified range by the number of people. The first determination step includes an allocated area determination step of determining whether the specified range is in a crowded state based on the allocated area, as a determination regarding the degree of congestion. In the allocated area determination step, if the allocated area is equal to or less than a predetermined value, it is determined that the state in the specified range is in a crowded state. In the notification step, the risk assessment is notified according to a combination of the determination result in the allocated area determination step and the determination result in the second determination step.

A program according to one aspect of the present disclosure is a program for causing a computer to execute the notification method.

According to an aspect of the present disclosure, there is provided a management system including the notification system and a detection system having the scanner and the plurality of tags and configured to detect the locations of the plurality of users, wherein the first determination unit of the notification system determines the density based on the detection results for each of the plurality of users detected by the detection system.

FIG. 1 is a diagram showing the configuration of a management system including a notification system according to an embodiment. FIG. 2 is a block diagram showing the configuration of the notification system. FIG. 3 is a diagram showing an example of a first evaluation screen displayed on an information terminal by the notification system according to the embodiment of the present invention. FIG. 4 is a diagram showing an example of a second evaluation screen displayed on an information terminal by the notification system according to the embodiment of the present invention. FIG. 5 is a sequence diagram illustrating the operation of a management system including the notification system of the above embodiment.

The embodiments and modifications described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiments and modifications. Various modifications other than the embodiments and modifications below are possible depending on the design, etc., as long as they do not deviate from the technical concept of the present disclosure.

(Embodiment)
The notification system 1 and management system 3 according to this embodiment will be described below with reference to FIGS.

(1) Overview As shown in FIG. 1 , the management system 3 according to this embodiment includes a notification server 10 as a notification system 1 and a detection system 2.

The detection system 2 is, for example, a Local Positioning System (LPS). As shown in FIG. 1, the detection system 2 comprises a detection server 20, a plurality of scanners 30 (four in the illustrated example), and a plurality of tags 40 (nine in the illustrated example). The plurality of scanners 30 are provided in a space 5 provided in a facility. The space 5 includes a plurality of predetermined ranges, for example, a plurality of zones (here, four zones 5a, 5b, 5c, and 5d). A scanner 30 is provided in each of the zones 5a to 5d. Here, the facility is an office building or office.

Each of the multiple tags 40 is configured to be able to communicate wirelessly with the scanner 30. The tags 40 are carried by the user. When the user enters one of the multiple zones 5a to 5d, the tag 40 communicates with the scanner 30 installed in that zone. When the scanner 30 receives identification information (e.g., a tag identifier that is the identifier of the tag 40) from the tag 40, it transmits user detection information to the detection server 20, which includes its own identifier, the tag identification information of the tag 40, and the reception strength of a signal representing information from the tag 40, and indicates that the presence of the user has been detected.

The detection server 20 receives user detection information from the scanners 30 and manages the user detection results by each scanner 30.

The detection system 2 further includes multiple (four in the illustrated example) sensors 50. Each sensor 50 detects air quality, for example, the concentration of carbon dioxide. A sensor 50 is provided in each of the zones 5a to 5d. That is, each sensor 50 detects the air quality (carbon dioxide concentration) in the zone 5a in which the sensor 50 is provided.

As shown in FIG. 2, the notification server 10 serving as the notification system 1 comprises a first determination unit 132, a second determination unit 133, and a notification unit 136. The first determination unit 132 determines the density of multiple users in a predetermined range in space 5 (e.g., zones 5a, 5b, 5c, and 5d) using congestion-related information related to the density of multiple users in the predetermined range, which is information based on the respective positions of the multiple users present in the predetermined range. The second determination unit 133 determines the continuous stay time of each of the multiple users in the predetermined range. The notification unit 136 notifies an infectious disease risk assessment for the predetermined range, which is an evaluation based on at least the determination results of the first determination unit 132 and the second determination unit 133.

The notification server 10 can also communicate with multiple (10 in the illustrated example) information terminals 60. The information terminals 60 are carried by users. The information terminals 60 are, for example, smartphones, tablet terminals, or portable personal computers.

In the following description, multiple scanners 30 may be referred to as scanners 31 to 34 as necessary. Similarly, multiple tags 40 may be referred to as tags 41 to 49 as necessary. Furthermore, multiple sensors 50 may be referred to as sensors 51 to 54 as necessary. Multiple information terminals 60 may be referred to as information terminals 61 to 70 as necessary.

In this embodiment, scanner 31 is provided in zone 5a, scanner 32 in zone 5b, scanner 33 in zone 5c, and scanner 34 in zone 5d. Sensor 51 is provided in zone 5a, sensor 52 in zone 5b, sensor 53 in zone 5c, and sensor 54 in zone 5d.

Furthermore, of the multiple information terminals 60, information terminals 61 to 69 are owned by each of the multiple users present within space 5, and information terminal 70 is owned by a user present outside space 5. In other words, information terminals 61 to 69 are owned by each of the multiple users who have come to the office, and information terminal 70 is owned by a user who has not yet come to work.

(2) Configuration Here, the configuration of the management system 3 will be described with reference to FIGS. 1 and 2. FIG.

(2.1) Detection System As shown in Fig. 1, the detection system 2 includes a detection server 20, a plurality of (four in the illustrated example) scanners 30, and a plurality of (nine in the illustrated example) tags 40. As shown in Fig. 1, the detection system 2 further includes a plurality of (four in the illustrated example) sensors 50.

The detection system 2 detects users present in each of the multiple zones 5a to 5d. In other words, the detection system 2 detects the locations of multiple users.

The tag 40 periodically transmits identification information via wireless communication.

Sensor 50 detects the air quality in the zone in which it is installed, in this case the concentration of carbon dioxide. Sensor 50 transmits the air quality detection results to scanner 30 via wireless communication. For example, sensor 51 detects the air quality (carbon dioxide concentration) in zone 5a and transmits the detection results to scanner 31 via wireless communication. Sensor 52 detects the air quality (carbon dioxide concentration) in zone 5b and transmits the detection results to scanner 32 via wireless communication. Sensor 53 detects the air quality (carbon dioxide concentration) in zone 5c and transmits the detection results to scanner 33 via wireless communication. Sensor 54 detects the air quality (carbon dioxide concentration) in zone 5d and transmits the detection results to scanner 34 via wireless communication.

The scanner 30 wirelessly acquires identification information, including the tag identifier of the tag 40, from the tag 40 present in the zone where the scanner 30 is installed. Upon acquiring the identification information, the scanner 30 transmits to the detection server 20 user detection information, including the identification information, the reception strength when the identification information was received, the date and time when the identification information was received (hereinafter referred to as the detection date and time), and the identifier of the scanner 30 (hereinafter referred to as the "scanner identifier").

For example, when scanner 31 acquires identification information for tag 41, it transmits user detection information to detection server 20, including the identification information for tag 41, the reception strength when the identification information for tag 41 was received, the detection date and time, and the scanner identifier for scanner 31. When scanner 31 acquires identification information for tag 42, it transmits user detection information to detection server 20, including the identification information for tag 42, the reception strength when the identification information for tag 42 was received, the detection date and time, and the scanner identifier for scanner 31. When scanner 31 acquires identification information for tag 43, it transmits user detection information to detection server 20, including the identification information for tag 43, the reception strength when the identification information for tag 43 was received, the detection date and time, and the scanner identifier for scanner 31.

When scanner 32 acquires identification information of tag 44, it transmits user detection information to detection server 20, including the identification information of tag 44, the reception strength when the identification information of tag 44 was received, the detection date and time, and the scanner identifier of scanner 32. When scanner 32 acquires identification information of tag 45, it transmits user detection information to detection server 20, including the identification information of tag 45, the reception strength when the identification information of tag 45 was received, the detection date and time, and the scanner identifier of scanner 32.

When scanner 33 acquires identification information of tag 46, it transmits user detection information to detection server 20, including the identification information of tag 46, the reception strength when the identification information of tag 46 was received, the detection date and time, and the scanner identifier of scanner 33. When scanner 33 acquires identification information of tag 47, it transmits user detection information to detection server 20, including the identification information of tag 47, the reception strength when the identification information of tag 47 was received, the detection date and time, and the scanner identifier of scanner 33.

When scanner 34 acquires identification information of tag 48, it transmits user detection information to detection server 20, including the identification information of tag 48, the reception strength when the identification information of tag 48 was received, the detection date and time, and the scanner identifier of scanner 34. When scanner 34 acquires identification information of tag 49, it transmits user detection information to detection server 20, including the identification information of tag 49, the reception strength when the identification information of tag 49 was received, the detection date and time, and the scanner identifier of scanner 34.

Scanner 30 acquires the detection results of the air quality (carbon dioxide concentration) of the zone in which scanner 30 is installed from sensors 50 located in that zone via wireless communication. Scanner 30 transmits the acquired detection results of the air quality (carbon dioxide concentration) to detection server 20. For example, scanner 31 acquires the detection results of sensor 51 via wireless communication and transmits the acquired detection results to detection server 20. Scanner 32 acquires the detection results of sensor 52 via wireless communication and transmits the acquired detection results to detection server 20. Scanner 33 acquires the detection results of sensor 53 via wireless communication and transmits the acquired detection results to detection server 20. Scanner 34 acquires the detection results of sensor 54 via wireless communication and transmits the acquired detection results to detection server 20.

The detection server 20 comprises, for example, a computer system having a processor and memory. The processor executes a program stored in the memory, causing the computer system to function as the detection server 20. The program executed by the processor is pre-recorded in the memory of the computer system in this case, but it may also be provided by being recorded on a non-transitory recording medium such as a memory card, or via a telecommunications line such as the Internet.

The detection server 20 is configured to be able to communicate with the notification server 10 via a network NT1 such as the Internet.

The detection server 20 receives user detection information from each scanner 30. The detection server 20 stores the received user detection information in a specified memory area and then transmits it to the notification server 10 via the network NT1.

The detection server 20 receives the detection results of air quality (carbon dioxide concentration) from each sensor 50. The detection server 20 transmits the received detection results of air quality (carbon dioxide concentration) to the notification server 10 via the network NT1.

(2.2) Notification Server The notification server 10 as the notification system 1 includes a communication unit 11, a storage unit 12, and a control unit 13, as shown in FIG.

The notification server 10 has, for example, a computer system having a processor and memory. The processor executes a program stored in the memory, causing the computer system to function as the control unit 13. The program executed by the processor is pre-recorded in the computer system's memory in this case, but it may also be provided by being recorded on a non-transitory recording medium such as a memory card, or via a telecommunications line such as the Internet.

The communication unit 11 has a communication interface for communicating with the detection server 20 and each information terminal 60 via the network NT1.

The memory unit 12 is composed of a device selected from ROM (Read Only Memory), RAM (Random Access Memory), or EEPROM (Electrically Erasable Programmable Read Only Memory), etc.

The memory unit 12 stores the floor area of each zone 5a to 5d. The memory unit 12 stores users in association with the tag identifiers of the tags 40 carried by the users. The memory unit 12 stores each of the zones 5a to 5d in association with the scanners 30 and sensors 50 installed in that zone. Specifically, the memory unit 12 stores zone 5a in association with scanner 31 and sensor 51. The memory unit 12 stores zone 5b in association with scanner 32 and sensor 52. The memory unit 12 stores zone 5c in association with scanner 33 and sensor 53. The memory unit 12 stores zone 5d in association with scanner 34 and sensor 54.

Furthermore, the memory unit 12 stores the risk assessments for infectious diseases for each of the zones 5a to 5d evaluated by the notification server 10 in chronological order.

As shown in Figure 2, the control unit 13 has an acquisition unit 131, a first judgment unit 132, a second judgment unit 133, a third judgment unit 134, an evaluation processing unit 135, and a notification unit 136.

The acquisition unit 131 acquires the user detection information transmitted by each scanner 30 from the detection server 20 via the network NT1. The acquisition unit 131 stores the acquired user detection information for each user in chronological order in the memory unit 12 based on the detection date and time included in the user detection information.

Furthermore, the acquisition unit 131 acquires the detection results detected by the sensor 50 that detects the air quality (carbon dioxide concentration) in the zone in which it is installed. The acquisition unit 131 acquires the detection results of the air quality (carbon dioxide concentration) sent by each scanner 30 from the detection server 20.

The first determination unit 132 makes a determination regarding the density of multiple users based on the detection results for each of the multiple users detected by the detection system 2. Specifically, the first determination unit 132 makes a determination regarding the density of multiple users in a predetermined range using congestion-related information related to the density of multiple users in the predetermined range, which is information based on the positions of each of the multiple users present in the predetermined range in the space 5 (each of the zones 5a to 5d). More specifically, the first determination unit 132 makes a determination regarding the density for each of the multiple zones 5a to 5d.

As shown in Figure 2, the first determination unit 132 has a distance determination unit 1321 and an allocated area determination unit 1322.

The congestion-related information includes the distance between two users in all one or more combinations of two users obtained from a plurality of users.

The first determination unit 132 obtains the number of users in each zone 5a to 5d based on the user detection information transmitted by each scanner 30.

The distance determination unit 1321 of the first determination unit 132 calculates the distance between two users included in one or more combinations of two users among the multiple users for each of the zones 5a to 5d where multiple users exist. The distance determination unit 1321 calculates the distance between the two users based on two reception intensities included in two pieces of user detection information, each containing the most recent detection date and time corresponding to each of the two users included in the pair for which the distance is to be obtained.

The distance determination unit 1321 makes a determination regarding the degree of crowding using crowding-related information including all distances between two users calculated for each of one or more combinations of two users from among the multiple users. Specifically, the distance determination unit 1321 determines whether the state within a predetermined range is a crowded state based on the distance between the users among the multiple users, as a determination regarding the degree of crowding. If the distance between the two users in at least one of the one or more combinations is less than or equal to a predetermined value (e.g., 2 meters), the distance determination unit 1321 determines that the state in the corresponding zone (predetermined range) is a crowded state. If the distance between the two users in each of the one or more combinations is greater than the predetermined value, the distance determination unit 1321 determines that the state in the corresponding zone (predetermined range) is not a crowded state.

Furthermore, the crowding-related information includes the allocated area per person relative to the floor area within a given range.

The allocated area determination unit 1322 of the first determination unit 132 determines whether a predetermined range is congested based on congestion-related information including the allocated area as a determination regarding the degree of congestion. Specifically, for each of zones 5a to 5d, the allocated area determination unit 1322 divides the floor area of the zone by the number of users present in that zone to calculate the allocated area per person for the zone. If the allocated area is less than a predetermined value (e.g., 4 square meters), the allocated area determination unit 1322 determines that the state of the corresponding zone (predetermined range) is congested.

The second determination unit 133 makes a determination regarding the continuous stay time within a predetermined range for each of the multiple users. More specifically, the second determination unit 133 makes a determination regarding the continuous stay time for each of the multiple zones 5a to 5d.

Specifically, the second determination unit 133 determines whether or not there is a user who has stayed in a predetermined range for a long period of time as a determination regarding the continuous stay time. For example, the second determination unit 133 determines whether or not there is a user who has stayed in the predetermined range for a long period of time for each of zones 5a to 5d (predetermined ranges) as a determination regarding the continuous stay time.

More specifically, the second determination unit 133 acquires multiple pieces of user detection information acquired by the acquisition unit 131 within the past 30 minutes for each of multiple users present in the zone being determined, based on the detection date and time included in the latest user detection information corresponding to that user. The second determination unit 133 uses the acquired multiple pieces of user detection information to acquire the continuous stay time up to the present time (the detection date and time included in the latest user detection information) in the zone where the scanner 30 represented by the scanner identifier included in the latest user detection information is installed.

For each of zones 5a to 5d, the second determination unit 133 makes a determination regarding continuous stay time using the continuous stay time of each of multiple users in that zone. Specifically, the second determination unit 133 determines whether or not there is a user who has been staying in that zone for a long time based on the continuous stay time of each of multiple users in that zone. Specifically, the second determination unit 133 determines whether or not there is a user among the multiple users in the zone being determined whose continuous stay time in that zone is equal to or longer than a predetermined time. The second determination unit 133 determines that there is a user who has been staying in that zone (predetermined range) for a long time if a predetermined number or more of the multiple users in the zone being determined have a continuous stay time in that zone equal to or longer than the predetermined time. In other words, the second determination unit 133 determines that there is a user whose continuous stay time in that zone is equal to or longer than the predetermined time if a predetermined number or more of the multiple users in the zone being determined have a continuous stay time in that zone equal to or longer than the predetermined time.

The second determination unit 133 determines that there are no users who have stayed in the zone (predetermined range) for a long time if, among multiple users present in the zone to be determined, there are fewer than a predetermined number of users whose continuous stay time in the zone is greater than or equal to a predetermined time. In other words, the second determination unit 133 determines that there are no users whose continuous stay time in the zone is greater than or equal to a predetermined time if, among multiple users present in the zone to be determined, there are fewer than a predetermined number of users whose continuous stay time in the zone is greater than or equal to a predetermined time.

The third determination unit 134 determines whether, during a predetermined period (e.g., 30 minutes) before the first determination unit 132 makes a determination, there are a predetermined number or more users among the multiple users who have moved from a second range, which is different from the first range as a predetermined range evaluated as having a high risk of infectious disease, to the first range. Here, the third determination unit 134 determines whether, during a predetermined period before the first determination unit 132 makes a determination, there is at least one user among the multiple users who has moved from the second range, which is evaluated as having a high risk of infectious disease, to the first range.

The third judgment unit 134 acquires multiple pieces of user detection information acquired by the acquisition unit 131 within a specified time period (for example, within the past 30 minutes) for each of multiple users present in the zone to be judged, based on the detection date and time included in the latest user detection information corresponding to that user (the user to be judged).

The third determination unit 134 uses the acquired multiple pieces of user detection information corresponding to the user to be determined to determine whether the user to be determined has moved from another zone within a specified time period. If the third determination unit 134 determines that the user to be determined has moved from another zone within a specified time period, it obtains from the memory unit 12 a risk assessment of the other zone when the user to be determined moves from the other zone to the zone to be determined.

The third determination unit 134 determines whether or not there is a risk assessment that indicates a high risk of infectious disease among one or more risk assessments corresponding to each of one or more users who have moved from another zone to the zone being determined. If the third determination unit 134 determines that there is a risk assessment that indicates a high risk of infectious disease among the one or more risk assessments, it determines that there is at least one user among the multiple users who has moved from the second range to the first range.

If the third determination unit 134 determines that none of the one or more risk assessments indicate a high risk of infectious disease, it determines that none of the multiple users have moved from the second range to the first range. Furthermore, if none of the multiple users present in the zone being determined have moved from another zone within a specified time period, the third determination unit 134 determines that none of the multiple users have moved from the second range to the first range.

The evaluation processing unit 135 performs an infectious disease risk assessment for each of zones 5a to 5d based on at least the assessment results of the first assessment unit 132 and the second assessment unit 133. For each of zones 5a to 5d, the evaluation processing unit 135 assesses at least one of the risks of infectious diseases caused by droplet contact and the risks of infectious diseases caused by aerosols. Here, the evaluation processing unit 135 performs risk assessment on a three-level scale. For example, a risk assessment value of "1" represents the highest risk of infectious diseases. A risk assessment value of "3" represents the lowest risk of infectious diseases. A risk assessment value of "2" represents an assessment result between the assessment values "1" and "3."

The following describes the case where the evaluation processing unit 135 performs a risk assessment of infectious diseases caused by droplet contact.

When assessing the risk of infectious diseases caused by droplet contact, the evaluation processing unit 135 performs the risk assessment based on the judgment results of the distance judgment unit 1321 of the first judgment unit 132 and the judgment results of the second judgment unit 133. Specifically, for each of zones 5a to 5d, the evaluation processing unit 135 performs the risk assessment using the judgment results based on the distance between users in the zone being evaluated and the judgment results of the continuous stay time in the zone being evaluated.

For example, if the determination result based on the distance between users by the distance determination unit 1321 for the zone to be evaluated is positive and the determination result by the second determination unit 133 is also positive, the evaluation processing unit 135 sets the risk assessment to an evaluation value of "1". In other words, if the determination result based on the distance between users by the distance determination unit 1321 for the zone to be evaluated indicates a dense state and the determination result by the second determination unit 133 indicates that there are users whose continuous stay time is equal to or longer than a predetermined time, the evaluation processing unit 135 sets the risk assessment to an evaluation value of "1".

If either the judgment result based on the distance between users by the distance judgment unit 1321 for the zone to be evaluated or the judgment result by the second judgment unit 133 is positive, the evaluation processing unit 135 sets the risk assessment to an evaluation value of "2". That is, if the judgment result based on the distance between users by the distance judgment unit 1321 for the zone to be evaluated indicates a dense state and the judgment result by the second judgment unit 133 indicates that there are no users whose continuous stay time is equal to or longer than a predetermined time, the evaluation processing unit 135 sets the risk assessment to an evaluation value of "2". Alternatively, if the judgment result based on the distance between users by the distance judgment unit 1321 for the zone to be evaluated indicates that there is no dense state and the judgment result by the second judgment unit 133 indicates that there are users whose continuous stay time is equal to or longer than a predetermined time, the evaluation processing unit 135 sets the risk assessment to an evaluation value of "2".

If both the judgment result based on the distance between users by the distance judgment unit 1321 for the zone to be evaluated and the judgment result by the second judgment unit 133 are not positive, the evaluation processing unit 135 sets the risk assessment to an evaluation value of "3". In other words, if the judgment result based on the distance between users by the distance judgment unit 1321 for the zone to be evaluated indicates that the zone is not densely packed, and the judgment result by the second judgment unit 133 indicates that there are no users whose continuous stay time is equal to or longer than a predetermined time, the evaluation processing unit 135 sets the risk assessment to an evaluation value of "3".

If the judgment result of the third judgment unit 134 for the zone to be evaluated is positive, the evaluation processing unit 135 changes the risk assessment set for the zone to be evaluated. Here, "the judgment result of the third judgment unit 134 for the zone to be evaluated is positive" means that the judgment result of the third judgment unit 134 has determined that there is at least one user who has moved to the zone to be evaluated from another zone that has been judged to have a high risk of infectious disease.

If the judgment result of the third judgment unit 134 for the zone being evaluated is positive, the evaluation processing unit 135 changes the risk assessment set for the zone being evaluated. The evaluation result (evaluation value) indicating a higher risk than the risk of infectious disease indicated by the set evaluation result is set as the risk assessment. For example, if the evaluation processing unit 135 sets the evaluation value to "3" and the judgment result of the third judgment unit 134 for the zone being evaluated is positive, the evaluation processing unit 135 resets the risk assessment to "2" as the evaluation value. If the evaluation value is set to "2" and the judgment result of the third judgment unit 134 for the zone being evaluated is positive, the evaluation processing unit 135 resets the risk assessment to "1" as the evaluation value.

Next, we will explain how the evaluation processing unit 135 performs risk assessment of infectious diseases caused by aerosols.

When assessing the risk of infectious diseases transmitted by aerosols, the evaluation processing unit 135 performs the risk assessment based on the judgment results of the allocated area judgment unit 1322 of the first judgment unit 132, the detection results of the sensor 50, and the judgment results of the second judgment unit 133. Specifically, for each of zones 5a to 5d, the evaluation processing unit 135 performs the risk assessment using the judgment results based on the allocated area per user in the zone being evaluated, the air quality (carbon dioxide concentration) of the zone being evaluated, and the judgment results of the continuous stay time in the zone being evaluated.

For example, if at least one of the following is true: the detection result indicates that the carbon dioxide concentration in the zone being evaluated is equal to or greater than a predetermined value; and the determination result based on the allocated area by the allocated area determination unit 1322 for the zone being evaluated is positive; and the determination result by the second determination unit 133 is positive, the evaluation processing unit 135 sets the risk assessment value to "1." Here, "the determination result based on the allocated area by the allocated area determination unit 1322 for the zone being evaluated is positive" means that the determination result based on the allocated area by the allocated area determination unit 1322 for the zone being evaluated has determined that the state in the zone being evaluated is a dense state.

If at least one of the following is true: the detection result indicates that the carbon dioxide concentration in the zone to be evaluated is equal to or greater than a predetermined value, and the determination result based on the allocated area by the allocated area determination unit 1322 for the zone to be evaluated is positive, and the determination result by the second determination unit 133 is not positive, the evaluation processing unit 135 sets the risk assessment to an evaluation value of "2". Alternatively, if both of the following are false: the detection result indicates that the carbon dioxide concentration in the zone to be evaluated is equal to or greater than a predetermined value, and the determination result based on the allocated area by the allocated area determination unit 1322 for the zone to be evaluated is positive, and the determination result by the second determination unit 133 is positive, the evaluation processing unit 135 sets the risk assessment to an evaluation value of "2".

If the detection result indicates that the carbon dioxide concentration in the zone being evaluated is above a predetermined value and the judgment result based on the allocated area by the allocated area judgment unit 1322 for the zone being evaluated is positive, and the judgment result by the second judgment unit 133 is not positive, the evaluation processing unit 135 sets the risk assessment value to "3".

If the judgment result of the third judgment unit 134 for the zone to be evaluated is positive, the evaluation processing unit 135 changes the risk assessment set for the zone to be evaluated. Here, "the judgment result of the third judgment unit 134 for the zone to be evaluated is positive" means that the judgment result of the third judgment unit 134 has determined that there is at least one user who has moved to the zone to be evaluated from another zone that has been judged to have a high risk of infectious disease.

If the judgment result of the third judgment unit 134 for the zone being evaluated is positive, the evaluation processing unit 135 changes the risk assessment set for the zone being evaluated. The evaluation result (evaluation value) indicating a higher risk than the risk of infectious disease indicated by the set evaluation result is set as the risk assessment. For example, if the evaluation processing unit 135 sets the evaluation value to "3" and the judgment result of the third judgment unit 134 for the zone being evaluated is positive, the evaluation processing unit 135 resets the risk assessment to "2" as the evaluation value. If the evaluation value is set to "2" and the judgment result of the third judgment unit 134 for the zone being evaluated is positive, the evaluation processing unit 135 resets the risk assessment to "1" as the evaluation value.

The notification unit 136 notifies the risk assessment of infectious diseases in each of the zones 5a to 5d, which is based on at least the judgment results of the first judgment unit 132 and the judgment results of the second judgment unit 133. The notification unit 136 notifies multiple risk assessments corresponding to the multiple zones 5a to 5d, respectively.

Specifically, the notification unit 136 notifies at least one of a risk assessment of infectious diseases caused by droplet contact and a risk assessment of infectious diseases caused by aerosols.

When notifying a risk assessment of an infectious disease caused by droplet contact, the notification unit 136 notifies the risk assessment according to the combination of the judgment result of the distance judgment unit 1321 of the first judgment unit 132 and the judgment result of the second judgment unit 133. In other words, the notification unit 136 notifies the risk assessment of an infectious disease caused by droplet contact performed by the evaluation processing unit 135 according to the combination of the judgment result of the distance judgment unit 1321 and the judgment result of the second judgment unit 133. For example, when notifying a risk assessment of an infectious disease caused by droplet contact, the notification unit 136 causes the information terminal 60 to display the risk assessment in a display mode according to the combination of the judgment result of the distance judgment unit 1321 and the judgment result of the second judgment unit 133.

When notifying a risk assessment of an infectious disease transmitted by aerosols, the notification unit 136 notifies the risk assessment based on a combination of the judgment result of the allocated area determination unit 1322 of the first determination unit 132, the detection result of the sensor 50, and the judgment result of the second determination unit 133. In other words, the notification unit 136 notifies the risk assessment of an infectious disease transmitted by aerosols performed by the evaluation processing unit 135 based on a combination of the judgment result of the allocated area determination unit 1322, the judgment result of the second determination unit 133, and the detection result of the sensor 50. For example, when notifying a risk assessment of an infectious disease transmitted by aerosols, the notification unit 136 causes the information terminal 60 to display the risk assessment in a display format based on a combination of the judgment result of the allocated area determination unit 1322, the judgment result of the second determination unit 133, and the detection result of the sensor 50.

Furthermore, when the judgment result of the third judgment unit 134 is positive, the notification unit 136 notifies, as a risk assessment, an assessment indicating a higher risk of infection than the risk indicated by the assessment based on at least the judgment result of the first judgment unit 132 and the judgment result of the second judgment unit 133. When notifying a risk assessment of infection due to droplet contact, and when the judgment result of the third judgment unit 134 is positive, the notification unit 136 notifies, as a risk assessment, an assessment indicating a higher risk of infection than the risk indicated by the assessment based on the judgment result of the distance judgment unit 1321 and the judgment result of the second judgment unit 133. When notifying a risk assessment of infection due to aerosols, and when the judgment result of the third judgment unit 134 is positive, the notification unit 136 notifies, as a risk assessment, an assessment indicating a higher risk of infection than the risk indicated by the assessment based on the judgment result of the allocated area judgment unit 1322, the detection result of the sensor 50, and the judgment result of the second judgment unit 133.

The notification unit 136 notifies at least one user among multiple users present in the zone to be evaluated of the risk assessment for the zone (predetermined range) to be evaluated. For example, the notification unit 136 notifies at least one user among multiple users present in the zone to be evaluated by transmitting the risk assessment to at least one information terminal 60 owned by each of the multiple users present in the zone to be evaluated. More specifically, the notification unit 136 identifies multiple users present in the zone to be evaluated based on multiple pieces of latest user detection information transmitted from scanners 30 installed in the zone to be evaluated. The notification unit 136 notifies (transmits) the risk assessment to at least one information terminal 60 among multiple information terminals 60 owned by each of the identified multiple users, in order to display the risk assessment on that information terminal 60.

For example, if the zone to be evaluated is zone 5a, the notification unit 136 notifies at least one information terminal 60 among the information terminals 61 to 63 of the risk assessment.

Furthermore, in this embodiment, the space 5 includes multiple zones 5a to 5d. Therefore, the notification unit 136 notifies at least one user present in the space 5 of the risk assessment for each of the zones 5a to 5d. In other words, the notification unit 136 notifies all risk assessments for the zones 5a to 5d to the information terminal 60 carried by at least one user present in the space 5.

The notification unit 136 notifies at least one user who exists in a range different from the zone (predetermined range) to be evaluated of the risk assessment for the zone to be evaluated. For example, the notification unit 136 notifies a user outside space 5 of the risk assessment for the zone (predetermined range) to be evaluated. In other words, the notification unit 136 notifies an information terminal 70 carried by a user outside space 5 of the risk assessment for the zone to be evaluated.

In this embodiment, space 5 includes multiple zones 5a to 5d. Therefore, the notification unit 136 notifies users outside space 5 of the risk assessment for each of zones 5a to 5d. In other words, the notification unit 136 notifies all risk assessments for zones 5a to 5d to an information terminal 70 carried by at least one user outside space 5. The information terminal 70 displays the risk assessment for each of zones 5a to 5d.

In other words, the notification unit 136 notifies at least one user present in the space 5 and at least one user present outside the space 5 of the risk assessment for each of the zones 5a to 5d. At this time, the notification unit 136 transmits notification information including the risk assessment for each of the zones 5a to 5d, a message corresponding to the risk assessment, and layout information regarding the layout of the space 5 to the information terminal 60 carried by the user to be notified. Furthermore, when transmitting notification information to a user present in the space 5, the notification unit 136 transmits zone identification information that identifies the zone in which the user is present, together with the notification information.

(2.3) Information Terminal The information terminal 60 has, for example, a computer system having a processor and a memory. The processor executes a program stored in the memory, causing the computer system to function as the information terminal 60. The program executed by the processor is pre-recorded in the memory of the computer system here, but may also be provided by being recorded on a non-transitory recording medium such as a memory card, or may be provided via a telecommunications line such as the Internet.

The information terminal 60 is configured to be able to communicate with the notification server 10 via the network NT1. As shown in Figure 1, the information terminal 60 has a display unit 601.

The display unit 601 is a thin display device such as a liquid crystal display or an organic EL (electroluminescence) display. The display unit 601 displays information related to risk assessment based on the notification information received from the notification server 10.

In response to user operation, the display unit 601 displays the first evaluation screen G1 (see Figure 3) which shows the risk assessment of each zone 5a to 5d based on the notification information.

In response to a user operation, the display unit 601 displays a first assessment screen G1 (see Figure 3) showing a risk assessment of each zone 5a to 5d based on the notification information. Specifically, the display unit 601 displays the risk assessment of each zone 5a to 5d superimposed on the layout of the space 5 based on the layout information.

In response to user operation, the display unit 601 displays the second evaluation screen G2 (see Figure 4), which contains information (a message based on the risk evaluation) regarding the risk assessment of a specific zone among the zones 5a to 5d (for example, the zone in which the user is located).

The following explains the first evaluation screen G1 and the second evaluation screen G2.

As shown in FIG. 3, the first evaluation screen G1 includes a layout image G11, one or more (four in the illustrated example) evaluation images G12, and one or more (three in the illustrated example) message images G13. When it is necessary to distinguish between the four evaluation images G12, they are referred to as evaluation images G121, G122, G123, and G124. When it is necessary to distinguish between the three message images G13, they are referred to as message images G131, G132, and G133.

Layout image G11 is an image representing the layout of space 5 based on layout information.

One or more evaluation images G12 correspond one-to-one to the risk assessments of zones 5a to 5d. Here, evaluation image G121 corresponds to the risk assessment of zone 5a, evaluation image G122 corresponds to the risk assessment of zone 5b, evaluation image G123 corresponds to the risk assessment of zone 5c, and evaluation image G124 corresponds to the risk assessment of zone 5d.

Each of the one or more evaluation images G12 is displayed superimposed on the corresponding zone in the layout image G11. That is, evaluation image G121 is displayed superimposed on the position of zone 5a in the layout image G11. Evaluation image G122 is displayed superimposed on the position of zone 5b in the layout image G11. Evaluation image G123 is displayed superimposed on the position of zone 5c in the layout image G11. Evaluation image G124 is displayed superimposed on the position of zone 5d in the layout image G11.

Each of the one or more evaluation images G12 is displayed in a display mode corresponding to the risk assessment result for the corresponding zone. For example, if the evaluation value, which is the risk assessment result for the corresponding zone, is "1," the evaluation image G12 is displayed in red. If the evaluation value, which is the risk assessment result for the corresponding zone, is "2," the evaluation image G12 is displayed in yellow. If the evaluation value, which is the risk assessment result for the corresponding zone, is "3," the evaluation image G12 is displayed in green.

In Figure 3, evaluation images G121 and G123 are displayed in red, evaluation image G122 in yellow, and evaluation image G124. That is, zones 5a and 5c are evaluated as having the highest risk of infectious diseases. Zone 5b is evaluated as having the second highest risk of infectious diseases. Zone 5d is evaluated as having the third highest, or lowest, risk of infectious diseases.

One or more message images G13 are images containing a message associated with a risk assessment having an assessment value of "1" or "2." The message image G13 contains at least one message corresponding to a risk assessment of infectious diseases caused by droplet contact and a risk assessment of infectious diseases caused by aerosols.

The message corresponding to the risk assessment of infectious diseases caused by droplet contact includes at least one of a first message, a second message, and a third message. The first message is a message corresponding to the determination result based on the distance between two users by the distance determination unit 1321 of the first determination unit 132. The second message is a message corresponding to the determination result by the second determination unit 133. The third message is a message corresponding to the determination result by the third determination unit 134.

The message corresponding to the risk assessment of aerosol-borne infectious diseases includes at least one of the fourth message, fifth message, sixth message, and seventh message. The fourth message is a message corresponding to the judgment result based on the allocated area per user by the allocated area judgment unit 1322 of the first judgment unit 132. The fifth message is a message corresponding to the judgment result of the second judgment unit 133. The sixth message is a message corresponding to the judgment result of the third judgment unit 134. The seventh message is a message corresponding to the detection result of the sensor 50.

The message image G131 shown in Figure 3 is a message based on a risk assessment of infectious diseases caused by droplet contact, and includes a message (first message) based on the judgment result based on the distance between two users by the distance judgment unit 1321.

Message image G132 is a message based on a risk assessment of infectious diseases caused by aerosols, and includes a message (7th message) based on the detection results of sensor 50 (52).

Message image G133 is a message based on a risk assessment of infectious diseases caused by droplet contact or aerosols, and includes a message (third message or sixth message) based on the judgment result of the third judgment unit 134.

As shown in FIG. 4, the second evaluation screen G2 includes one or more message images G21 (one in the illustrated example). The message image G21 includes a message corresponding to a risk assessment of a specific zone (e.g., the zone in which the user is located) among the zones 5a to 5d. The message image G21 includes at least one message selected from a message corresponding to a risk assessment of infectious diseases caused by droplet contact and a message corresponding to a risk assessment of infectious diseases caused by aerosols. Furthermore, the message image G21 may include a message related to countermeasures.

The message corresponding to the risk assessment of infectious diseases due to droplet contact includes at least one of the eighth message, the ninth message, and the tenth message. The eighth message is a message corresponding to the determination result based on the distance between two users by the distance determination unit 1321 of the first determination unit 132. The ninth message is a message corresponding to the determination result of the second determination unit 133. The tenth message is a message corresponding to the determination result of the third determination unit 134.

The messages corresponding to the risk assessment of aerosol-borne infectious diseases include at least one of the 11th message, 12th message, 13th message, and 14th message. The 11th message is a message corresponding to the judgment result based on the allocated area per user by the allocated area judgment unit 1322 of the first judgment unit 132. The 12th message is a message corresponding to the judgment result of the second judgment unit 133. The 13th message is a message corresponding to the judgment result of the third judgment unit 134. The 14th message is a message corresponding to the detection result of the sensor 50.

Message image G21 shown in FIG. 4 is a message corresponding to a risk assessment of infection due to droplet contact, and includes a message (eighth message) corresponding to the determination result based on the distance between two users by the distance determination unit 1321. Message image G21 shown in FIG. 4 further includes a message (let's move to zone C) suggesting moving to a zone determined to have the lowest risk of infection as a countermeasure. Here, zone C corresponds to, for example, zone 5d described above.

(3) Operation Here, the operation of the management system 3 will be described with reference to FIG.

The detection server 20 transmits the user detection information received from each scanner 30 to the notification server 10 (steps S1, S2).

The detection server 20 transmits the detection results of air quality (carbon dioxide concentration) received from each sensor 50 to the notification server 10 (steps S3, S4).

The first determination unit 132 of the notification server 10 performs a first determination process (step S5). The first determination unit 132 makes a determination regarding the density for each of the multiple zones 5a to 5d. The first determination unit 132 obtains the number of users in each zone 5a to 5d based on the user detection information and makes a determination regarding the density. More specifically, the distance determination unit 1321 of the first determination unit 132 makes a determination regarding the density based on the distance between two users for each zone 5a to 5d. The allocated area determination unit 1322 of the first determination unit 132 makes a determination regarding the density based on the allocated area per user for each zone 5a to 5d.

The second determination unit 133 of the notification server 10 performs a second determination process (step S6). The second determination unit 133 determines, for each of zones 5a to 5d, whether or not there is a user who has been staying in the specified range for a long period of time as a determination regarding the continuous stay time. For each of multiple users present in the zone being determined, the second determination unit 133 obtains the continuous stay time using the latest user detection information corresponding to that user and multiple pieces of user detection information obtained within the past 30 minutes. The second determination unit 133 makes a determination regarding the continuous stay time using the continuous stay time of each of the multiple users in the zone being determined.

The third determination unit 134 of the notification server 10 performs a third determination process (step S7). For each of zones 5a to 5d, the third determination unit 134 determines whether, during the predetermined period before the first determination unit 132 makes its determination, at least one user among multiple users present in the zone being evaluated has moved from another zone evaluated as having a high risk of infectious diseases.

The evaluation processing unit 135 of the notification server 10 performs evaluation processing (step S8). The evaluation processing unit 135 performs a risk assessment of at least one of the risk of infectious diseases caused by droplet contact and the risk of infectious diseases caused by aerosols for each of the zones 5a to 5d based on at least the judgment results of the first judgment unit 132 and the second judgment unit 133. When performing a risk assessment of infectious diseases caused by droplet contact, the evaluation processing unit 135 performs a risk assessment for each of the zones 5a to 5d based on the judgment results of the distance judgment unit 1321 of the first judgment unit 132 and the judgment results of the second judgment unit 133. When performing a risk assessment of infectious diseases caused by aerosols, the evaluation processing unit 135 performs a risk assessment for each of the zones 5a to 5d based on the judgment results of the allocated area judgment unit 1322 of the first judgment unit 132, the detection results of the sensor 50, and the judgment results of the second judgment unit 133.

The notification unit 136 of the notification server 10 performs notification processing (step S9). The notification unit 136 notifies at least one of the risk assessments of infectious diseases caused by droplet contact and the risk assessment of infectious diseases caused by aerosols.

The notification unit 136 transmits notification information, including a risk assessment for each of the zones 5a to 5d, a message corresponding to the risk assessment, and layout information regarding the layout of the space 5, to the information terminal 60 carried by the user to be notified (step S10). When transmitting notification information to a user present in the space 5, the notification unit 136 transmits the notification information together with zone identification information identifying the zone in which the user is present.

When the information terminal 60 receives the notification information from the notification server 10, it performs a display process in response to a user operation (step S11). The information terminal 60 displays the first evaluation screen G1 or the second evaluation screen G2 (see Figure 4) on the display unit 601.

(4) Advantages As described above, the notification system 1 of this embodiment includes a first determination unit 132, a second determination unit 133, and a notification unit 136. The first determination unit 132 determines the density of multiple users in a predetermined range (e.g., zones 5a to 5d) in the space 5 using congestion-related information related to the density of multiple users in the predetermined range, the congestion-related information being information based on the respective positions of multiple users present in the predetermined range. The second determination unit 133 determines the continuous stay time of each of the multiple users in the predetermined range. The notification unit 136 notifies an infectious disease risk assessment for the predetermined range, which is an assessment based on at least the determination results of the first determination unit 132 and the second determination unit 133.

With this configuration, by determining the density of multiple users and the duration of their continuous stay within a specified range of space 5 as a specific location, it is possible to obtain a risk assessment of infectious diseases at the specific location. In other words, it is possible to perform a risk assessment of infectious diseases at the specific location regardless of whether or not there are users with infectious diseases. Then, by notifying the risk assessment, it is possible to notify the user of the risk of infectious diseases at the specific location. In other words, the user can know the risk of infectious diseases at the specific location regardless of whether or not there are users with infectious diseases.

(5) Modifications Modifications are listed below. The modifications described below can be applied in appropriate combination with the above-described embodiment.

(5.1) Modification 1
In the above embodiment, the notification server 10 is configured to acquire the number of users present in each of the zones 5a to 5d and calculate the distance between two users, but this is not limiting. The detection server 20 may acquire the number of users present in each of the zones 5a to 5d and calculate the distance between two users.

(5.2) Modification 2
In the above embodiment, the notification server 10 is configured to perform risk assessment of an aerosol-borne infectious disease using the determination result of the allocated area determination unit 1322 of the first determination unit 132, the detection result of the sensor 50, and the determination result of the second determination unit 133. However, this configuration is not limited to this. The notification server 10 may perform risk assessment of an aerosol-borne infectious disease using the determination result of the allocated area determination unit 1322 and the determination result of the second determination unit 133. In this case, the evaluation processing unit 135 performs risk assessment based on the determination result of the allocated area determination unit 1322 and the determination result of the second determination unit 133. The notification unit 136 notifies a risk assessment according to a combination of the determination result of the allocated area determination unit 1322 and the determination result of the second determination unit 133.

(5.3) Modification 3
Although the notification server 10 and the detection server 20 are configured as separate servers, the configuration is not limited to this and the notification server 10 and the detection server 20 may be configured in the same housing, i.e., as the same device.

(5.4) Modification 4
In the above embodiment, the detection system 2 is configured as an LPS, but is not limited to this configuration. The detection system 2 may be any system that can identify a user present in a detection target range (zone) and detect the location of the user.

(5.5) Modification 5
In the above embodiment, the evaluation processing unit 135 of the notification server 10 is configured to perform a three-stage risk evaluation, but is not limited to this configuration. The evaluation processing unit 135 may also perform a two-stage risk evaluation or a four-stage or more stage risk evaluation.

For example, when performing a two-stage risk assessment, the evaluation processing unit 135 makes the following judgment.

When assessing the risk of infection due to droplet contact, the evaluation processing unit 135 determines that the risk of infection due to droplet contact is high for the zone being evaluated if at least one of the judgment results of the distance judgment unit 1321 of the first judgment unit 132 and the judgment result of the second judgment unit 133 is positive. When neither the judgment result of the distance judgment unit 1321 nor the judgment result of the second judgment unit 133 is positive for the zone being evaluated, the evaluation processing unit 135 determines that the risk of infection due to droplet contact is low.

In addition, when the evaluation processing unit 135 performs a risk assessment of infectious diseases caused by aerosols, it determines that there is a high risk of infectious diseases caused by aerosols when at least one of the following conditions is met for the zone being evaluated: the carbon dioxide concentration is a predetermined value or higher; the judgment result based on the allocated area by the allocated area judgment unit 1322 of the first judgment unit 132 is positive; and the judgment result by the second judgment unit 133 is positive.

(5.6) Modification 6
The third determination unit 134 may add the continuous stay time in the other zone of a user who has moved from a zone assessed as having a high risk of infectious disease to the zone being determined to be the determination target. In this case, the third determination unit 134 determines whether or not there is a risk evaluation that indicates a high risk of infectious disease among one or more risk evaluations corresponding to each of one or more users who have moved from another zone to the zone being determined to be the determination target. If the third determination unit 134 determines that there is a risk evaluation that indicates a high risk of infectious disease among the one or more risk evaluations, it determines whether or not the continuous stay time of the user corresponding to the risk evaluation is equal to or longer than a predetermined time. If it determines that the continuous stay time of the user corresponding to the risk evaluation is equal to or longer than the predetermined time, the third determination unit 134 determines that there is at least one user who has moved from a zone assessed as having a high risk of infectious disease to the zone being determined to be the determination target.

(5.7) Modification 7
The third determination unit 134 is configured to determine whether there is at least one user who has moved from a zone evaluated as having a high risk of infection to the zone being determined. However, this configuration is not limiting. The third determination unit 134 may determine whether there is a predetermined number or more users who have moved from a zone evaluated as having a high risk of infection to the zone being determined.

In this case, when the third judgment unit 134 determines that there are a predetermined number or more users who have moved from a zone evaluated as having a high risk of infectious disease to the zone being judged, the evaluation processing unit 135 changes the risk assessment, i.e., raises the risk assessment by one level.

(5.8) Modification 8
The third determination unit 134 is configured to determine whether there is at least one user who has moved from another zone evaluated as having a high risk of infection to the zone being determined during a predetermined period before the first determination unit 132 makes a determination. However, the present invention is not limited to this configuration.

The third judgment unit 134 may also determine whether there are a predetermined number or more users in the zone to be judged, whose cumulative continuous stay time in a zone assessed to have a high risk of infectious disease over the past few days (e.g., 14 days) is greater than a predetermined period (e.g., 24 hours).

In this case, when the third determination unit 134 determines that there are a predetermined number or more users in the zone to be determined whose cumulative continuous stay time in a zone evaluated as having a high risk of infectious disease over the past few days is greater than a predetermined period of time, the evaluation processing unit 135 changes the risk assessment, i.e., raises the risk assessment by one level.

(5.9) Variation 9
In the above embodiment, the multiple scanners 30 and the multiple zones 5a to 5d are configured to correspond one-to-one, i.e., one scanner 30 is provided for one zone. However, this configuration is not limiting. Multiple scanners 30 may be provided for one zone.

(5.10) Other Modifications The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Furthermore, functions similar to those of the notification system 1 may be embodied in a management method, a computer program, a non-transitory recording medium on which a program is recorded, or the like.

A notification method of the notification system 1 according to one embodiment includes a first determination step, a second determination step, and a notification step. The first determination step determines the density of multiple users in a predetermined range in space 5 (e.g., zones 5a-5d) using congestion-related information related to the density of multiple users in the predetermined range, the congestion information being information based on the respective positions of multiple users present in the predetermined range. The second determination step determines the continuous stay time of each of the multiple users in the predetermined range. The notification step notifies an infectious disease risk assessment for the predetermined range, which is an evaluation based on at least the determination results of the first determination step and the second determination step. A program according to one embodiment is a program for causing a computer system to function as the above-mentioned notification system 1 or the notification method of the notification system 1.

The entity that executes the notification system 1 or the notification method of the notification system 1 in the present disclosure includes a computer system. The computer system has a processor and memory as hardware. The processor executes a program recorded in the memory of the computer system to realize the functions of the entity that executes the notification system 1 or the management method of the notification system 1 in the present disclosure. The program may be pre-recorded in the memory of the computer system, or may be provided via a telecommunications line. The program may also be provided by being recorded on a non-transitory recording medium readable by the computer system, such as a memory card, optical disc, or hard disk drive. The processor of the computer system is composed of one or more electronic circuits, including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits, such as ICs and LSIs, are referred to by different names depending on the degree of integration, and include integrated circuits called system LSIs, very large-scale integration (VLSI), or ultra-large-scale integration (ULSI). Furthermore, a field-programmable gate array (FPGA) that is programmed after the LSI is manufactured, or a logic device that allows the reconfiguration of the connections within the LSI or the reconfiguration of the circuit partitions within the LSI, can also be employed as a processor. Multiple electronic circuits may be integrated into a single chip or distributed across multiple chips. Multiple chips may be integrated into a single device or distributed across multiple devices.

Furthermore, it is not essential for notification system 1 that multiple functions are concentrated within a single housing; the components of notification system 1 may be distributed across multiple housings. Furthermore, at least some of the functions of notification system 1 may be realized by the cloud (cloud computing), etc.

(summary)
As described above, the notification system (1) of the first aspect includes a first determination unit (132), a second determination unit (133), and a notification unit (136). The first determination unit (132) determines the density of multiple users in a predetermined range (e.g., zones 5a to 5d) in a space (5) using congestion-related information related to the density of multiple users in the predetermined range, the congestion-related information being information based on the respective positions of multiple users present in the predetermined range. The second determination unit (133) determines the continuous stay time of each of the multiple users in the predetermined range. The notification unit (136) notifies an infectious disease risk assessment for the predetermined range, which is an assessment based on at least the determination results of the first determination unit (132) and the second determination unit (133).

This configuration allows users to know the risk of infectious diseases in a specific location (specified area).

In the second aspect of the notification system (1), in the first aspect, the congestion-related information includes the distance between two users in all of one or more combinations of two users obtained from a plurality of users. The first determination unit (132) has a distance determination unit (1321). The distance determination unit (1321) determines whether the state within a predetermined range is a dense state based on the distance between users among the plurality of users, as a determination regarding the degree of congestion. The distance determination unit (1321) determines that the state within the predetermined range is a dense state if the distance between the two users is equal to or less than a predetermined value in at least one combination of one or more combinations. The notification unit (136) notifies a risk assessment based on the combination of the determination result of the distance determination unit (1321) and the determination result of the second determination unit (133).

This configuration makes it possible to determine whether a certain area is densely packed based on the distance between two users. This allows for notification of a risk assessment of infectious diseases caused by droplet contact.

In the notification system (1) of the third aspect, in the first or second aspect, the crowding-related information includes an allocated area per person relative to the floor area in a specified range. The first determination unit (132) has an allocated area determination unit (1322). The allocated area determination unit (1322) determines whether or not a specified range is in a crowded state based on the allocated area as a determination regarding the degree of crowding. If the allocated area is equal to or less than a specified value, the allocated area determination unit (1322) determines that the state in the specified range is in a crowded state. The notification unit (136) notifies a risk assessment based on a combination of the determination result of the allocated area determination unit (1322) and the determination result of the second determination unit (133).

This configuration makes it possible to determine whether a certain area is densely packed based on the area allocated to each user. This allows for notification of a risk assessment of aerosol-borne infectious diseases.

The notification system (1) of the fourth aspect is the third aspect, further comprising an acquisition unit (131). The acquisition unit (131) acquires the detection results detected by a sensor (50) that detects the concentration of carbon dioxide within a predetermined range. The notification unit (136) notifies a risk assessment based on a combination of the determination results of the allocated area determination unit (1322), the detection results, and the determination results of the second determination unit (133).

With this configuration, it is possible to notify a risk assessment based on a combination of the carbon dioxide concentration detection results, the determination results of the allocated area determination unit (1322), and the determination results of the second determination unit (133). This makes it possible to notify a more accurate risk assessment of aerosol-borne infectious diseases.

In the notification system (1) of the fifth aspect, in any of the first to fourth aspects, the second determination unit (133) determines whether or not there is a user who has stayed for a long time in a predetermined range as a determination regarding the continuous stay time. The second determination unit (133) determines that there is a user who has stayed for a long time in the predetermined range when the continuous stay time in the predetermined range for a predetermined number of users or more out of the multiple users is a predetermined time or more.

This configuration allows each user to be notified of a risk assessment based on their continuous stay time within a specified range.

The notification system (1) of the sixth aspect is any one of the first to fifth aspects, further comprising a third determination unit (134). The third determination unit (134) determines whether or not there are a predetermined number of users among the plurality of users who have moved from a second range, which is different from the first range as a predetermined range evaluated as having a high risk of infectious disease, to the first range during a predetermined period before the first determination unit (132) makes a determination. If the determination result of the third determination unit (134) is positive, the notification unit (136) notifies, as the risk assessment, an assessment indicating a higher risk of infectious disease than the risk indicated by the assessment based on at least the determination results of the first determination unit and the second determination unit.

This configuration allows for risk assessments that take user movement into account.

In the seventh aspect of the notification system (1), in any of the first to sixth aspects, the space (5) includes a plurality of zones (5a to 5d). Each of the plurality of zones (5a to 5d) is within the above-mentioned predetermined range. The first determination unit (132) makes a determination regarding the density for each of the plurality of zones (5a to 5d). The second determination unit (133) makes a determination regarding the continuous stay time for each of the plurality of zones (5a to 5d). The notification unit (136) notifies a plurality of risk assessments corresponding to each of the plurality of zones (5a to 5d).

This configuration allows for notification of risk assessments in each of multiple zones (5a-5d).

In the notification system (1) of the eighth aspect, in any of the first to seventh aspects, the notification unit (136) notifies at least one user out of multiple users present within a specified range of the risk assessment.

With this configuration, users within a specified range can learn the risk assessment for infectious diseases within that specified range.

In the ninth aspect of the notification system (1), in any of the first to eighth aspects, the notification unit (136) notifies at least one user located in a range different from the specified range of the risk assessment.

With this configuration, users outside the specified area can learn the risk assessment for infectious diseases within that area. Therefore, the user can decide whether or not to visit the specified area based on the risk assessment. In other words, the user can avoid the risk of contracting an infectious disease by visiting the specified area.

The notification method of the tenth aspect includes a first determination step, a second determination step, and a notification step. The first determination step determines the density of multiple users in a predetermined range using congestion-related information related to the density of multiple users in the predetermined range, the congestion-related information being information based on the respective positions of multiple users present in the predetermined range in the space (5). The second determination step determines the continuous stay time of each of the multiple users in the predetermined range. The notification step notifies an infectious disease risk assessment in the predetermined range, which is an evaluation based on at least the determination results of the first determination step and the second determination step.

This notification method allows users to know the risk of infectious diseases in a specific location (specified area).

The program of the 11th aspect is a program for causing a computer to execute the notification method of the 10th aspect.

This program allows users to know the risk of infectious diseases in a specific location (specified area).

A management system (3) of a twelfth aspect includes a notification system (1) of any one of the first to ninth aspects and a detection system (2) that detects the locations of multiple users. A first determination unit (132) of the notification system (1) makes a determination regarding the density based on the detection results for each of the multiple users detected by the detection system (2).

This configuration allows users to know the risk of infectious diseases in a specific location (specified area).

1 Notification system 2 Detection system 3 Management system 5 Space 5a, 5b, 5c, 5d Zone (predetermined range)
10 Notification server 50, 51, 52, 53, 54 Sensor 131 Acquisition unit 132 First determination unit 133 Second determination unit 134 Third determination unit 136 Notification unit 1321 Distance determination unit 1322 Allocated area determination unit

Claims (10)

an acquisition unit that acquires, when a scanner installed within a predetermined range in a space installed within a facility receives signals from a plurality of tags carried by a plurality of users present within the predetermined range, a plurality of pieces of user detection information corresponding to the plurality of users from the scanner;
a first determination unit that determines a density of the plurality of users in the predetermined area using congestion-related information related to the density of the plurality of users in the predetermined area, the congestion-related information being information based on the positions of the plurality of users obtained from the plurality of user detection information;
a second determination unit that determines a continuous stay time in the predetermined range of each of the plurality of users obtained from the plurality of pieces of user detection information;
a notification unit that notifies an assessment of a risk of infection within the predetermined range based on at least the assessment result of the first assessment unit and the assessment result of the second assessment unit ,
the first determination unit acquires the number of users within the predetermined range based on the acquired plurality of pieces of user detection information;
the congestion-related information includes an allocated area per person relative to the floor area in the predetermined range, which is a result of dividing the floor area in the predetermined range by the number of people;
the first determination unit includes an allocated area determination unit that determines whether the predetermined range is in a dense state based on the allocated area as the determination regarding the density,
the allocated area determination unit determines that the state in the predetermined range is a dense state when the allocated area is equal to or smaller than a predetermined value,
the notification unit notifies the risk assessment according to a combination of the determination result of the allocated area determination unit and the determination result of the second determination unit.
Notification system. The acquisition unit further acquires a detection result detected by a sensor that detects a carbon dioxide concentration within the predetermined range,
the notification unit notifies the risk assessment according to a combination of the determination result of the allocated area determination unit, the detection result, and the determination result of the second determination unit.
The notification system of claim 1 . the acquisition unit periodically acquires the plurality of pieces of user detection information;
The second determination unit
determining whether or not there is a user who has stayed in the predetermined area for a long time based on the plurality of pieces of user detection information periodically acquired as the determination regarding the continuous stay time;
If the continuous stay time in the predetermined range is equal to or longer than a predetermined time for a predetermined number of users among the plurality of users, it is determined that there is a user who has stayed in the predetermined range for a long time.
3. The notification system according to claim 1 or 2. a third determination unit that determines whether or not there are a predetermined number of users among the plurality of users who have moved from a second range, which is different from a first range as the predetermined range, in which the users are evaluated to have a high risk of the infectious disease, to the first range during a predetermined period before the first determination unit makes a determination,
When the determination result of the third determination unit is positive, the notification unit notifies, as the risk assessment, an assessment indicating a risk of the infectious disease that is higher than the risk indicated by an assessment based on at least the determination result of the first determination unit and the determination result of the second determination unit.
A notification system according to any one of claims 1 to 3. the space includes a plurality of zones;
each of the plurality of zones is the predetermined range,
the first determination unit performs a determination regarding the density for each of the plurality of zones;
the second determination unit performs a determination regarding the continuous stay time for each of the plurality of zones;
The notification unit notifies the plurality of risk assessments corresponding to the plurality of zones, respectively.
A notification system according to any one of claims 1 to 4. the notification unit notifies at least one user of the plurality of users present within the predetermined range of the risk assessment;
A notification system according to any one of claims 1 to 5. the notification unit notifies the risk assessment to at least one user who exists in a range different from the predetermined range;
A notification system according to any one of claims 1 to 6. an acquisition step of acquiring, when a scanner installed within a predetermined range in a space installed within a facility receives signals from a plurality of tags carried by a plurality of users present within the predetermined range, a plurality of pieces of user detection information corresponding to the plurality of users from the scanner;
a first determination step of determining a density of the plurality of users in the predetermined area using congestion-related information related to the density of the plurality of users in the predetermined area, the congestion-related information being information based on the positions of the plurality of users obtained from the plurality of user detection information;
a second determination step of determining a continuous stay time in the predetermined range for each of the plurality of users obtained from the plurality of user detection information;
a notification step of notifying an assessment of a risk of infection within the predetermined range, the assessment being based on at least the results of the first and second assessment steps,
In the first determination step, the number of users in the predetermined range is acquired based on the acquired plurality of pieces of user detection information;
the congestion-related information includes an allocated area per person relative to the floor area in the predetermined range, which is a result of dividing the floor area in the predetermined range by the number of people;
the first determination step includes an allocated area determination step of determining whether the predetermined range is in a dense state based on the allocated area as the determination regarding the density,
In the allocation area determination step, if the allocation area is equal to or smaller than a predetermined value, it is determined that the state in the predetermined range is a dense state;
In the notification step, the risk assessment according to a combination of the determination result in the allocated area determination step and the determination result in the second determination step is notified.
Notification method. A program for causing a computer to execute the notification method according to claim 8. A notification system according to any one of claims 1 to 7;
a detection system having the scanner and the plurality of tags, and configured to detect the locations of the plurality of users;
the first determination unit of the notification system makes a determination regarding the density based on a detection result for each of the plurality of users detected by the detection system;
Management system.