JP6736061B2 - Reporting system, reporting method, and reporting program - Google Patents

Description

The present invention relates to a reporting system, a reporting method, and a reporting program.

In recent years, many monitoring systems have been developed and provided for reporting an emergency situation when an elderly person who lives alone or who is often alone for a long time feels sick. In such a monitoring system, by installing a report button in the bedroom or living room or by wearing a pendant-type report button by the target person, when the target person presses the report button, the target person can be notified of an emergency in the monitoring center. It is a mechanism to report. However, such a system cannot press the notification button when the physical condition becomes unreachable in a place where the notification button is out of reach. There was a problem that it was not possible to report when the physical condition changed in the bathroom. In order to solve such a problem, a health condition monitoring system has been disclosed in which a parent station monitors biometric information and presence information of a subject without burdening the subject (see Patent Document 1).

JP 2004-154310 JP

However, the health condition monitoring system described in Patent Document 1 described above acquires the information emitted by the subject by a pressure sensor attached to the living equipment used by the subject or the floor of a building in which the subject exists. Therefore, in order to detect information no matter where the target person is, it is necessary to install a pressure sensor in every place, and it is difficult to put the pressure sensor into practical use in a general home.

The present invention has been made in view of the above, and does not limit the place where the target person exists nor does the target person need to wear a specific device, and informs the information emitted by the target person with simple equipment. The purpose is to provide a reporting system, a reporting method, and a reporting program that can be performed.

In order to solve the above-mentioned problems, in the present invention, the piezoelectric sensor converts a change in pressure into a voltage value, and the tapping sound detection device detects the time when the tapping sound is generated from the voltage value detected by the piezoelectric sensor, and the communication device The time when the tapping sound is detected is transmitted to the notification determination server, and it is determined whether the time when the tapping sound received by the notification determination server matches a predetermined determination condition. When it is determined that the determination conditions are met, the notification information is transmitted to the notification destination.

According to the present invention configured as described above, it is possible to detect a tapping sound from the vibration of the air in a wide monitoring area and determine whether or not a notification is necessary from the detected tapping sound, so that the target person exists. There is an effect that it is not necessary to limit the place and the target person has to wear a specific device, and the information emitted by the target person can be reported with simple equipment.

It is a block diagram which shows the structure of the notification system 10 concerning a present Example. 3 is an explanatory diagram showing the shape and physical configuration of the piezoelectric sensor 100. FIG. 3 is an explanatory diagram showing a configuration of a tap sound detection device 200. FIG. 6 is a graph showing an example of an electric signal (voltage value) output by the piezoelectric sensor 100. 6 is a flowchart showing a tapping sound detection/transmission processing procedure executed by the piezoelectric sensor 100, the tapping sound detection device 200, and the communication device 300. 7 is a flowchart showing a procedure of notification determination processing executed by the notification determination server 400.

Embodiments of the present invention will be described below with reference to the accompanying drawings. The following description is an example of the embodiment, and the present invention is not limited to these examples.

FIG. 1 is a block diagram showing the configuration of the notification system 10 according to the present embodiment. As shown in FIG. 1, the notification system 10 includes a piezoelectric sensor 100, a hammering detection device 200, a communication device 300, and a notification determination server 400. The piezoelectric sensor 100, the tapping sound detection device 200, and the communication device 300 are installed in the monitoring target area 1 such as the home of an elderly person. In FIG. 1, for simplification of illustration, the piezoelectric sensor 100 and the tapping sound detection device 200 each have one configuration, but the number is not limited to one, and a plurality of piezoelectric sensors 100 are installed in the monitoring target area 1. It may be connected to the tap sound detection device 200. Further, the tapping sound detection device 200 may be installed for each piezoelectric sensor 100. The communication device 300 and the notification determination server 400 are communicably connected to each other via the network N. The network N is a communication network such as the Internet, an intranet, a LAN (Local Area Network), and a mobile communication network, and a part or all of them are connected by wire or wirelessly.

FIG. 2 is an explanatory diagram showing the shape and physical configuration of the piezoelectric sensor 100. The piezoelectric sensor 100 is a sensor that converts a change in pressure into an electric signal, and the piezoelectric sensor used in this embodiment is applied by a solid (for example, a human hand or body) or a liquid that directly or indirectly contacts the sensor. It is possible to detect not only the change in pressure when the pressure changes due to force, but also the change in pressure caused by the vibration of air, which is a gas. Further, the piezoelectric sensor 100 can be used in a planar shape, a semi-cylindrical shape (including not only half but also a partially opened state and a cylinder) as shown in FIG. 2, and any other size and shape. .. The piezoelectric sensor 100 has a structure in which an electrode (front surface) 21 and an electrode (rear surface) 22 are laminated with an electret sheet 25 described below from both sides.

Next, a schematic diagram of a cross section (inside) of the piezoelectric sensor 100 is shown. The principle of the voltage sensor 100 will be described with reference to the schematic diagram. In the piezoelectric sensor 100, the polymer foam 23 contains charged bubbles 24 that are positively or negatively charged, and the front surface and the back surface of the polymer foam 23 are laminated with electrodes 21 and 22, respectively. The polymer foam 23 containing the positively or negatively charged charged air bubbles 24 is called an electret sheet 25, and a large amount of electric charge remains in the charged air bubbles 24 when not pressurized.

When pressure is applied to the piezoelectric sensor 100, a potential difference is generated due to deformation of the charged bubbles 24 by the pressure (vibration of air) received from the surface of the piezoelectric sensor 100, and the generated potential difference is detected as an electric signal (voltage value). To do. That is, the magnitude of vibration of air can be measured by the magnitude of the electric signal (voltage value). The electret sheet 25 constituting the piezoelectric sensor 100 of this embodiment has an average thickness of 90 to 150 μm, a foaming ratio of 3.5 to 9 times, and a gel fraction of 30 to 50% by weight. This is a foamed sheet, and the propylene-based resin foamed sheet contains a resin composition containing 60% by weight or more of a cross-linked propylene-α-olefin random copolymer having a weight average molecular weight of 370,000 to 420,000.

By adopting such a configuration, the charged bubble 24 is deformed by weak vibration, and it is possible to detect a weak pressure change such that a tapping sound which is usually difficult to detect vibrates the air. Further, since the piezoelectric sensor 100 is composed of the electret sheet having the above-mentioned composition and the electrode made of the aluminum film, it is bendable, has flexibility and pressure resistance, and is resistant to deformation. For example, a rectangular sheet as shown in FIG. It can be bent and molded into a semi-cylindrical shape and installed at the end of the monitored region 1. When the piezoelectric sensor 100 forms a curved surface and is installed in a corner of a room, assuming that the width of the piezoelectric sensor 100 is W (cm), the radius of curvature R is about 4W/2π<R<4W/2π+2. It is desirable to set the range. Thereby, one piezoelectric sensor 100 can detect a tap sound in a wide area. Further, since it is flexible and light, it can be attached to an article in the monitored area 1, for example, a flowerpot or a pillar.

The tapping sound detection device 200 is a microcomputer that controls the operation of the entire tapping sound detection device, and includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like, and is stored in the memory. Various processes are performed according to the program. The tap sound detection device 200 determines whether or not the electrical signal (voltage value) output by the piezoelectric sensor 100 is a tap sound, and when it is determined that the tap signal is a tap sound, the notification device 300 is notified of the time at which the tap sound was generated. Output. The tapping sound in the present embodiment is a pulsed signal having a duration of less than 1 millisecond. FIG. 3 is an explanatory diagram showing the configuration of the tap sound detection device 200. As shown in FIG. 3, the tapping sound detection device 200 includes a filter unit 201, a tapping sound determination unit 202, a timer unit 203, and a reference value storage unit 210.

FIG. 4 is a graph showing an example of an electric signal (voltage value) output by the piezoelectric sensor 100. The voltage value detected by the piezoelectric sensor 100 is input to the tap sound detection device 200 as an electric signal as shown in FIG. In the tapping sound detection device 200, first, a noise component that interferes with the judgment of whether or not the tapped sound is included in the input voltage value is removed by the filter unit 201 described later. The tap sound determination unit 202 determines whether or not the change in the voltage value shaped by the filter unit 201 is a tap sound. As shown in FIG. 4, the tapping sound determination unit 202 determines that the portion indicated by a circle in FIG. 4 is a tapping sound, and the portion indicated by a triangle is a voice other than the tapping sound. That is, a sharp tap change (a change that appears as a sharp peak in the graph) such as the voltage change 41 is struck by the subject clapping the wall or floor with a hand or a cane to request external notification. The change in the voltage value such that the peak of the voltage value is continuous as indicated by the voltage value change 42 is determined to be a voice other than a tap sound such as a loud voice or music.

Further, each part of the tap sound detection device 200 will be described. The reference value storage unit 210 stores a reference value for the tap sound determination unit 202 to judge the tap sound. More specifically, the reference value storage unit 210 stores the measurement time that determines the interval at which the electrical signal (voltage value) output from the filter unit 201 is measured, the number of samples that determines the number of times of measurement, and the average value of the voltage values of the number of samples. A threshold value for determining whether or not the voltage value has a possibility of tapping, a duration time for determining whether or not the voltage is a tapping sound, and the like are stored. Each reference value stored in the reference value storage unit 210 stores a value adjusted according to the situation of the monitored area 1.

The filter unit 201 shapes the raw voltage value input from the piezoelectric sensor 100 into data that allows the tapping determination unit 202 to determine whether or not the tapping sound is generated. The filter unit 201 further includes an operational amplifier 2011, a high pass filter 2012, a low pass filter 2013, an amplifier circuit 2014, and a notch filter 2015.

The operational amplifier 2011 amplifies a weak electric signal output from the piezoelectric sensor 100. By amplifying the potential difference between the two points on the front and back of the piezoelectric sensor 100, noise (inductive noise from the power source, etc.) that is simultaneously superimposed on both the front and back is removed. The high pass filter 2012 cuts low frequency components (for example, less than 0.3 Hz). In particular, a gentle electric signal such as a drift component (jitter around 0 mV) is removed.

The low-pass filter 2013 cuts high-frequency components (for example, more than 1.5 kHz). Especially, non-stationary noise components (for example, lightning, switch ON/OFF, thermal noise in the circuit, etc.) are removed. However, it has been confirmed in a verification experiment that the tapping sound is not removed and is transmitted. The amplifier circuit 2014 sufficiently amplifies the electric signal shaped by the above-mentioned respective units. The notch filter 2015 cuts noise from the commercial power supply. Since the noise from the commercial power source is mixed in at various places, it is finally cut in the final processing.

The tap sound determination unit 202 detects the time at which the tap sound occurs from the electric signal shaped by the filter unit 201. More specifically, the beating sound determination unit 202 determines whether or not the electrical sound shaped by the filter unit 201 has a sharp peak, and determines whether or not the electrical sound is an impacting sound. When the determination is made, the time at which the tapping sound is generated is output to the notification device 300.

The timer unit 203 measures the time at which the tapping sound is generated when the tapping determination unit 202 determines that the electrical signal (voltage value) output from the piezoelectric sensor 100 is a tapping sound.

The communication device 300 is a so-called network connection device that connects the tap sound detection device 200 and the network N, and connects the tap sound occurrence time determined by the tap sound determination unit 202 of the tap sound detection device 200 via the network N. It transmits to the notification determination server 400.

The notification determination server 400 is a normal computer including a CPU, a RAM, a ROM, a communication I/F that connects to a network for communication, and an external storage device such as an HDD (Hard Disk Drive). It is determined whether or not the time when the tapping sound of the monitored area 1 is received matches the tapping pattern that requires the notification, and if it matches, the notification information is transmitted to the notification destination. The notification determination server 400 includes a determination condition storage unit 410, a hammering information storage unit 420, a target person information storage unit 430, a transmission/reception unit 401, a notification determination unit 402, and a notification information generation unit 403.

The determination condition storage unit 410 stores a tapping pattern that requires notification. The tapping pattern requiring notification is a judgment condition that allows the target person to make an external notification, for example, the tapping sound is repeated three times or more at intervals of 2 seconds or less. The determination condition storage unit 410 may store the target person identification information and the hitting pattern in association with each other, so that the hitting pattern is different for each target person.

The tapping information storage unit 420 is a storage unit that stores the target person identification information and the tapping detection time. The tapping information storage unit 420 associates the target person identification information and the tapping detection time with each reception of the target person identification information and the tapping detection time transmitted from the communication device 300 in the monitoring target area 1. To remember.

The target person information storage unit 430 stores information about the target person who is the monitoring target. The target person information storage unit 430 stores the target person identification information for identifying the target person, the notification destination, and the target person information necessary for reporting the target person name and the like in association with each other. As a notification destination, in addition to the person in charge of the family of the target person and the person in charge of watching in the neighborhood, a watching center, an administrative institution, etc. corresponding to an emergency are stored.

The transmission/reception unit 401 transmits/receives data to/from the communication device 300 or the notification destination 500 via the Netcirc N. The transmission/reception unit 401 receives the target person identification information and the time at which the tapping sound is generated from the communication device 300, and stores it in the tapping information storage unit 420. The transmission/reception unit 401 transmits the notification information to the notification destination 500.

Whether the notification determination unit 402 stores the tapping sound generation time for each subject stored in the tapping information storage unit 420 with the tapping pattern associated with the target person identification information stored in the determination condition storage unit 410. It is judged whether or not the notification is necessary.

The notification information generation unit 403 acquires a notification destination associated with the target person identification information from the target person information storage unit 430, and generates notification information to be transmitted to the acquired notification destination. The notification information is, for example, an email or push notification to be sent to the notification destination 500 (specifically, a server, a tablet terminal, a smartphone, a mobile phone, etc.), a command to display the notification information for an application program running on the device of the notification destination 500, and the like. Is.

A tap sound detection/transmission process executed by the piezoelectric sensor 100, the tap sound detection apparatus 200, and the communication apparatus 300 of the notification system 10 configured as described above will be described. FIG. 5 is a flowchart showing a tapping sound detection/transmission processing procedure executed by the piezoelectric sensor 100, the tapping sound detection device 200, and the communication device 300. First, the piezoelectric sensor 100 constantly outputs the voltage value detected by the vibration of the charged bubbles 24 shown in FIG. 2 to the filter unit 201 of the tapping sound detection device 200, and the filter of the tapping sound detection device 200. The section 201 shapes (filters) the input voltage value and outputs it to the tap sound determination section 202.

The hitting sound determination unit 202 of the hitting sound detection device 200 reads various reference values stored in the reference value storage unit 210 (step S501). Specifically, the sampling rate (for example, sampling rate: 5 kHz, that is, interrupt time: 0.2 msec), which is the frequency of reading the voltage value output from the filter unit 201, and the number of samples for averaging the voltage values ( For example, 10), a threshold value (for example, 100 mV) for determining whether or not the voltage value has a possibility of tapping, and a duration of the voltage value for determining whether or not there is a tapping sound (for example, 0.1 seconds). ) Is read.

The tap sound determination unit 202 determines whether or not the current time measured by the timer unit 203 is the measurement time (step S502). Specifically, it is determined whether or not the interrupt time has elapsed from the previous reading time of the voltage value. When it is determined that the current time is the measurement time (step S502: Yes), the voltage value output from the filter unit 201 is read (step S503). The tapping determination unit 202 stores the read voltage value in a storage unit (not shown) (hereinafter referred to as a buffer) (step S504). When it is determined that the current time is not the measurement time (step S502: No), the process returns to step S502.

The tapping determination unit 202 determines whether or not a predetermined number of voltage values are stored in the buffer (step S505). When it is determined that the predetermined number of voltage values are not stored in the buffer (step S505: No), the process returns to step S502. When it is determined that a predetermined number of voltage values are stored in the buffer (step S505: Yes), the tapping determination unit 202 calculates the average value of the voltage values stored in the buffer (step S506).

The tap sound determination unit 202 determines whether or not the average value of the voltage values is equal to or more than the threshold value (step S507). When it is determined that the average value of the voltage values is equal to or higher than the threshold value (step S507: Yes), the detection time is stored in the storage unit (not shown) because it may be a tap sound (step S508). When it is determined that the average value of the voltage values is not equal to or more than the threshold value (step S507: No), the process proceeds to step S509 without storing the detection time in the storage unit.

The tap sound determination unit 202 determines whether or not the period in which the average voltage value is equal to or greater than the threshold value has continued for a predetermined period (step S509). Specifically, it is determined whether or not the tapping detection times stored in the storage unit are continuously stored for a predetermined period. When it is determined that the period in which the average value of the voltage values is equal to or higher than the threshold value does not continue for the predetermined period (No in step S509), the voltage value exceeds the threshold value, and the period in which the voltage value exceeds the threshold value is within the predetermined period, that is, the voltage. Since the change in the value is abrupt, it is determined that a tapping sound is generated in the monitored area. The steep change of the voltage value is shown as a voltage value change 41 in the graph of FIG. When it is determined that the tapping sound is generated, the detection time stored in the storage unit is output to the communication device 300 as the tapping detection time, and the communication device 300 stores the tapping detection time and the target person stored in the communication device 300. The identification information is transmitted to the notification determination server 400 (step S510). The target person identification information may be any information as long as it can identify the target person, such as the IP address (Internet Protocol address) of the communication device 300. After that, the process returns to step S502, and the voltage value output from the filter unit 201 at the measurement time is read.

When it is determined that the period in which the average value of the voltage values is the threshold value or more continues for the predetermined period (step S509: Yes), that is, when it is determined that the sound is not the tap sound, the process returns to step S502, and the measurement time is filtered. The voltage value output from the unit 201 is read.

Next, a notification determination process executed by the notification determination server 400 of the notification system 10 will be described. FIG. 6 is a flowchart showing a notification determination processing procedure executed by the notification determination server 400.

The transmission/reception unit 401 of the notification determination server 400 receives the tapping detection time and the target person identification information from the communication device 300 (step S601). The transmission/reception unit 401 stores the tapping sound detection time and the target person identification information in the tapping information storage unit 420 (step S602). The notification determination unit 402 acquires the tapping pattern stored in the determination condition storage unit 410 and associated with the target person identification information (step S603).

The notification determination unit 402 determines whether or not the hitting sound detection time stored in the hitting sound detection time storage unit 420 for each target person identification information matches the hitting sound pattern (step S604).

When it is determined that the tapping detection time and the tapping pattern match (step S604: Yes), the notification information generating unit 403 generates notification information (step S605). More specifically, the notification information generation unit 403 acquires the target person information such as the notification destination and the target person name associated with the target person identification information from the target person information storage unit 430, and transmits the acquired target person information. Generate report information. The transmission/reception unit 401 transmits the notification information to the notification destination (step S606). When it is determined that the tapping detection time and the tapping pattern do not match (step S604: No), the process returns to step S601 to receive the tapping detection time and the target person identification information transmitted from the communication device 300.

As described above, since the piezoelectric sensor 100 can widely detect the tapping sound in the monitoring target area 1, the target person is not limited to the place where the target person exists, and the target person does not need to wear a specific device. The simple equipment including the one or a plurality of piezoelectric sensors 100, the hammering detection device 200, and the communication device 300 can externally notify the information emitted by the target person indicating the intention of the target person.

In addition, since it is possible to determine whether or not a call is necessary without collecting the voices of the target person or the visitor with a microphone, daily conversations are not recorded and there is no fear of invading privacy. Further, by accurately filtering the electric signal output from the highly accurate piezoelectric sensor 100 and performing the tapping determination processing, it is possible to detect the tapping sound emitted by the target person without exception, and the notification pattern unintended by the target person is given by the tapping pattern. Since it can be excluded, it is possible to properly monitor the target person.

The physical configuration and the hardware configuration of the piezoelectric sensor 100, the tapping sound detection device 200, the communication device 300, and the notification determination server 400 according to the above-described embodiments are as described above, and the tapping sound detection device 200 and the communication device 300 are described. The notification determination server 400 realizes the above-described configurations and functions by causing the CPU to read and operate the programs stored in the ROM, the RAM, the HDD, and the like.

The programs that operate in the tapping sound detection device 200, the communication device 300, and the notification determination server 400 are stored in a computer connected to a network such as the Internet, and can be provided by being downloaded via the network or installed. The file may be recorded in a computer-readable recording medium such as a CD-ROM, a DVD, a USB memory, or an SD card and provided in a file in a format or an executable format. In addition, all or part of the programs that implement the above-described functions and processes may be provided in the usage form of API (Application Programming Interface), SaaS (Software as a Service), or cloud computing.

The present invention is not limited to the above-described embodiments as they are, and does not necessarily have to be physically configured as illustrated. In addition, the present invention functionally or physically divides, integrates, replaces, modifies or deletes all or part of the components described in the embodiments in arbitrary units according to various loads and usage conditions. Can be configured.

N... Network, 10... Notification system, 100... Piezoelectric sensor, 200... Tapping sound detection device, 201... Filter section, 2011... Operation amplifier, 2012... High pass filter, 2013... Low pass filter, 2014... Amplification circuit, 2015... Notch filter , 202... hammering determination unit, 203... timer unit, 210... reference value storage unit, 300... communication device, 400... notification determination server, 401... transmission/reception unit, 402... notification determination unit, 403... notification information generation unit, 410 ... determination condition storage unit, 420... hammering information storage unit, 430... target person information storage unit, 500... report destination

Claims (6)

A piezoelectric sensor that converts pressure changes into voltage values,
A striking sound detection device that detects the occurrence time of the striking sound from the voltage value detected by the piezoelectric sensor,
A communication device that transmits the time of occurrence of the tapping sound detected by the tapping sound detection device to a notification determination server connected via a network,
The notification determination server,
Receiving means for receiving the generation time of the tapping sound from the communication device,
Judging means for judging whether or not the generation time of the tapping sound received by the receiving means meets a predetermined judging condition;
A notification system comprising: a transmission means for transmitting notification information to a notification destination when the determination means determines that the time at which the tapping sound is generated matches the determination condition. The notification system according to claim 1, wherein the piezoelectric sensor includes charged bubbles in a polymer foam, and both surfaces of the polymer foam are laminated with electrodes. The notification system according to claim 1 or 2, wherein the tap sound detection device determines that a sharp change in the voltage value detected by the piezoelectric sensor is a tap sound. The notification determination server further includes a determination condition storage unit that stores a tapping pattern intended for a notification as the determination condition,
4. The determination unit determines whether or not the time at which the tapping sound is generated matches the tapping sound pattern stored in the determination condition storage unit, according to any one of claims 1 to 3. Report system described. A notification method executed by a hammering detection device and a notification determination server connected to the hammering detection device via a network,
The tapping detection device,
A tapping sound detection step of detecting the time at which a tapping sound is generated from the voltage value detected by a piezoelectric sensor that converts a change in pressure into a voltage value,
A first transmission step of transmitting the time of occurrence of the tapping sound detected by the tapping sound detection step to the notification determination server connected via a network,
The notification determination server,
A receiving step of receiving the time of occurrence of the tapping sound from the tapping detection device;
A determination step of determining whether or not the generation time of the tapping sound received by the reception step matches a predetermined determination condition;
A second transmitting step of transmitting notification information to a report destination when it is judged by the judging step that the time at which the tapping sound is generated matches the judgment condition. To a tapping sound detection device equipped with a piezoelectric sensor that converts a change in pressure into a voltage value,
A tapping sound detecting step of detecting a tapping sound occurrence time from the voltage value detected by the piezoelectric sensor,
A first transmitting step of transmitting the time of occurrence of the tapping sound detected by the tapping sound detection step to a notification determination server connected via a network,
In the notification determination server connected to the tapping detection device via a network,
A receiving step of receiving the time of occurrence of the tapping sound from the tapping detection device;
A determination step of determining whether or not the generation time of the tapping sound received by the reception step matches a predetermined determination condition;
A second transmitting step of transmitting report information to a report destination when it is determined by the determining step that the generation pattern of the tapping sound matches the determination condition;
A notification program characterized by causing the user to execute.

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