JP7032201B2 - Authentication system and mobile terminal - Google Patents

Description

The present invention relates to an authentication system and a mobile terminal.

In an authentication system that executes authentication processing for users who are trying to pass through a door that restricts entry to the security area, the user does not have to hold an ID card or the like over a card reader installed near the door, for example, hands-free. Some users are authenticated.

For example, in the hands-free authentication system described in Patent Document 1, when a user who has a mobile terminal such as a wireless tag approaches the door, the mobile terminal automatically installs the user's ID information near the door. Send to an authentication device such as a wireless tag reader. Then, the authentication device measures the signal strength of the radio signal transmitted from the mobile terminal, and performs authentication processing only for the user existing near the door so that the measured signal strength becomes equal to or higher than a predetermined threshold value. And unlock the door if the authentication is successful.

Japanese Unexamined Patent Publication No. 2012-219483

However, although the technique described in Patent Document 1 can determine whether or not the user is in the vicinity of the door, it is sufficiently determined whether or not the user really has the intention to pass through the door. Can not do it. For example, in the authentication system described in Patent Document 1, a user who only talks around the door or a user who just passes in front of the door exists in the vicinity of the door with a mobile terminal. Then, authentication is automatically performed and the door is unlocked. As a result, the door is unintentionally unlocked so that a third party can pass through the door, or authentication is performed even though the user is not passing through the door, and the user enters the security area. It will be recorded that you have entered, and you will not be able to perform correct entry / exit management.

Therefore, an object of the present invention is to provide an authentication system and a mobile terminal capable of improving the authentication accuracy of a user.

According to one aspect of the present invention for solving such a problem, an authentication system including a radio wave transmitter, a portable terminal held in front of the user's body, and an authentication device, wherein the radio wave transmitter is an authentication system. The mobile terminal has a radio wave transmitting means that is arranged facing the authentication target with a predetermined space in between and transmits radio waves toward the authentication target, and the mobile terminal has a radio wave intensity of the radio wave received from the radio wave transmitter. A measuring means for measuring the frequency, a determining means for determining whether or not the user located in the predetermined space is suitable for the authentication target, and a determining means for determining whether the user is suitable for the authentication target based on the radio wave strength. When the authentication is performed, the authentication device has a transmitting means for transmitting an authentication request signal including the user's ID information to the authentication device, and the authentication device has a storage unit for storing the user's ID information and authentication from the mobile terminal. It has an authentication means that executes an authentication process of a user by comparing the ID information included in the authentication request signal with the ID information stored in advance in the storage unit when the request signal is received.

It is preferable that the determination means determines that the user is suitable for the authentication target when the radio wave intensity is equal to or less than a predetermined threshold value.

It is preferable that the determination means determines that the user is suitable for the object to be authenticated when the radio wave intensity decreases by a predetermined change width or more within a predetermined period.

The authentication device is attached to the object to be authenticated, one of the mobile terminal and the authentication device transmits a wireless signal to the other of the mobile terminal and the authentication device, and the other is portable based on the signal strength of the wireless signal received from the other. It further has a proximity determination means for determining whether or not the terminal exists in the vicinity of the authentication target, and the authentication means determines that the mobile terminal exists in the vicinity of the authentication target and receives an authentication request signal from the mobile terminal. If so, it is preferable to execute the authentication process.

The mobile terminal includes a motion detection unit that detects the movement of the mobile terminal, a stationary determination means that determines whether or not the user is walking based on the magnitude of the movement of the mobile terminal detected by the motion detection unit. It is preferable that the authentication means executes the authentication process when it is determined that the user is not walking and the authentication request signal is received from the mobile terminal.

The object to be certified is a regulatory means that physically regulates the movement from the first space to the second space, and the certification device is a regulation that lifts the regulation when the certification means determines that the certification is successful. It is preferable to further have a release portion.

Further, according to another aspect of the present invention, it is a mobile terminal held on the front surface of the user's body and is an authentication target from a radio wave transmitter arranged facing the authentication target with a predetermined space in between. A measuring means for measuring the radio wave strength of a radio wave transmitted toward an object, and a determining means for determining whether or not a user located in a predetermined space is suitable for an object to be authenticated based on the radio wave strength. It has a transmitting means for transmitting an authentication request signal including an ID information of a user to an authentication device when it is determined that the person is suitable for an object to be authenticated.

According to the present invention, an authentication system and a mobile terminal capable of improving the authentication accuracy of a user are provided.

It is a figure which shows roughly the structure of the authentication system which concerns on 1st Embodiment. It is a block diagram which shows the structure of the mobile terminal, the authentication device, and the radio wave transmitter in the authentication system which concerns on 1st Embodiment. It is a flowchart which shows the processing of the mobile terminal in the authentication system which concerns on 1st Embodiment. It is a flowchart which shows the process of the authentication apparatus in the authentication system which concerns on 1st Embodiment. It is a figure for demonstrating the radio wave strength of the radio wave received from the radio wave transmitter measured by the mobile terminal of the authentication system which concerns on 1st Embodiment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and can be appropriately modified without departing from the gist thereof. Further, those having the same or equivalent functions in each figure may be designated by the same reference numerals, and the description thereof may be omitted or simplified.

[First Embodiment]
FIG. 1 is a diagram schematically showing the configuration of the authentication system 1 according to the first embodiment. FIG. 1A is a view when the authentication system 1 is viewed from the front side of the door 6. Further, FIG. 1B is a view when the authentication system 1 is viewed from the upper side of the door 6. The authentication system 1 includes a mobile terminal 2, an authentication device 3, and a radio wave transmitter 4.

In the public area of FIG. 1, there are users 7 (7a, 7b) who have the mobile terminal 2. User 7a is facing door 6 trying to enter the security area hands-free. On the other hand, the user 7b is just trying to pass in front of the door 6. Seen from the user 7a, the front side of the door 6 is a public area, and the other side of the door 6 is a security area. Access from public areas to security areas is restricted by door 6. The door 6 is locked in a normal state, and the locking / unlocking of the door 6 is controlled by the authentication device 3 provided in the vicinity of the door 6.

Here, the exit of the user 7 from the security area to the public area is not particularly limited in this embodiment. At the time of leaving the security area, the locking / unlocking of the door 6 may be restricted in the same manner as the entrance to the security area, or the door 6 may be allowed to pass freely. Further, the means for restricting the passage of the user 7 may be other than the door 6, for example, the movement of the user 7 from the first space to the second space adjacent to the first space in a predetermined area is physically performed. It may be a flapper type security gate, an automatic door, or the like that controls opening and closing. In addition to humans, the user 7 may be, for example, a robot or the like.

The authentication system 1 is used so that the user 7a who has the intention of passing through the door 6 is authenticated and the user 7b who does not have the intention of passing through the door 6 is not authenticated. It is determined whether or not the persons 7a and 7b are facing the door 6. Specifically, it is determined whether or not the front surface of the bodies of the users 7a and 7b faces the door 6.

The mobile terminal 2 is held and used in front of the body of the user 7. As the mobile terminal 2, for example, a wireless tag, a smartphone, or the like is used. The mobile terminal 2 is housed in a storage body through which radio waves pass, and is hung from the neck of the user 7 to the front surface of the body of the user 7 by a neck strap or the like.

The authentication device 3 performs the authentication process of the user 7. The authentication device 3 of FIG. 1 is provided on the door 6, but the present embodiment is not limited to this. The authentication device 3 may be provided in addition to the door 6, and may be attached to the door 6 such as a wall surface, a ceiling, or a floor around the door 6.

The radio wave transmitter 4 is arranged facing the door 6 with a predetermined space in which the user 7 can move, and transmits radio waves toward the door 6. As the radio wave transmitter 4, for example, a BLE (Bluetooth (registered trademark) Low Energy) beacon that periodically transmits a beacon signal is used. The radio wave transmitter 4 may be arranged anywhere on the ceiling, wall, ground, or the like as long as it faces the door 6 with a predetermined space in between.

The management device 5 is a database server or the like, and adds area information, time information, and the like to the admission record information received from the plurality of authentication devices 3 and registers the information in the database.

FIG. 2 is a block diagram showing the configurations of the mobile terminal 2, the authentication device 3, and the radio wave transmitter 4 in the authentication system 1 according to the first embodiment.

FIG. 2A shows the configuration of the mobile terminal 2. The mobile terminal 2 includes a control unit 20, a storage unit 21, a wireless communication unit 22, a motion detection unit 23, and a display unit 24.

The control unit 20 is a processor such as a CPU (Central Processing Unit) that executes a program recorded in the storage unit 21 and controls and calculates the mobile terminal 2. The control unit 20 has a measuring means 25, a determining means 26, a transmitting means 27, and a stationary determination means 28.

The storage unit 21 stores a program for performing control and calculation of the mobile terminal 2 executed by the control unit 20. Further, the storage unit 21 stores in advance the ID information of the user 7 who owns the mobile terminal 2, the identification information of the authentication device 3, the identification information of the radio wave transmitter 4, and the like. Here, the ID information of the user 7 is, for example, an ID number or an employee number assigned to each user 7. Alternatively, the ID information of the user 7 may be an identification number or a serial number set for each mobile terminal 2 held by the user 7. Further, the storage unit 21 may store the radio wave intensity from the radio wave transmitter 4 measured at a plurality of times.

The storage unit 21 can have a semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), and an EPROM (Erasable Project ROM). Further, the storage unit 21 may have any type of storage device such as a flash memory, a magnetic storage device, and an optical storage device.

The wireless communication unit 22 performs wireless communication with the authentication device 3. Further, the wireless communication unit 22 receives the radio wave transmitted from the radio wave transmitter 4. As the wireless communication unit 22, a wireless module having a wireless communication interface such as BLE, ZigBee, or Wi-fi is used. If the type of wireless module used for wireless communication between the wireless communication unit 22 and the authentication device 3 and the type of wireless module used for receiving radio waves from the radio wave transmitter 4 are the same, both radio waves are used. Identification information may be included in each radio wave for distinction. In this case, the wireless communication unit 22 receives the wireless signal from the authentication device 3 only when the identification information included in the wireless signal transmitted from the authentication device 3 matches the identification information stored in the storage unit 21 in advance. do. Further, the wireless communication unit 22 measures the radio wave received from the radio wave transmitter 4 only when the identification information included in the radio wave transmitted from the radio wave transmitter 4 matches the identification information stored in advance in the storage unit 21. do.

The motion detection unit 23 detects the motion of the mobile terminal 2 based on the position, speed, acceleration, or the like of the mobile terminal 2, and outputs detection information indicating the magnitude of the detected motion. As the motion detection unit 23, for example, an indoor positioning system such as a GPS (Global Positioning System), a gyro sensor, an acceleration sensor, or an IMES (Indoor Messaging System) possessed by the mobile terminal 2 is used.

The display unit 24 is a display device such as a liquid crystal panel or an organic EL display, and for example, displays information received from the authentication device 3 on the display device and notifies the user 7.

FIG. 2B shows the configuration of the authentication device 3. The authentication device 3 includes a control unit 30, a storage unit 31, a wireless communication unit 32, an electric lock control unit 33, and a management device communication unit 34.

The control unit 30 is a processor such as a CPU that executes a program recorded in the storage unit 31 and controls and calculates the authentication device 3. The control unit 30 has an authentication means 35, a signal strength measuring means 37, and a neighborhood determination means 38.

The storage unit 31 stores a program for performing control and calculation of the authentication device 3 executed by the control unit 30. Further, the storage unit 31 stores in advance the ID information of the user 7 who owns the mobile terminal 2, the identification information of the mobile terminal 2, and the like. Further, the storage unit 31 may store the entrance record information indicating that the user 7 has been permitted to enter. The storage unit 31 can have a semiconductor memory such as RAM, ROM, and EPROM. Further, the storage unit 31 may have any type of storage device such as a flash memory, a magnetic storage device, and an optical storage device.

The wireless communication unit 32 performs wireless communication with the mobile terminal 2. As the wireless communication unit 32, a wireless module having a wireless communication interface such as BLE, ZigBee, or Wi-fi is used. The wireless communication unit 32 receives the wireless signal from the mobile terminal 2 only when the identification information included in the wireless signal transmitted from the mobile terminal 2 matches the identification information stored in advance in the storage unit 31. You may.

The electric lock control unit 33 is connected to the electric lock of the door 6 wirelessly or by wire, and has an interface circuit for controlling the locking / unlocking of the electric lock of the door 6. The wireless communication unit 32 may be used for communication between the electric lock control unit 33 and the electric lock of the door 6.

The management device communication unit 34 has a communication interface circuit that is connected to the management device 5 wirelessly or by wire via a local network, a wide area network, or the like, and communicates with the management device 5. For communication between the authentication device 3 and the management device 5, the wireless communication unit 32 may be used instead of the management device communication unit 34.

FIG. 2C shows the configuration of the radio wave transmitter 4. The radio wave transmitter 4 includes a control unit 40, a storage unit 41, and a wireless communication unit 42.

The control unit 40 is a processor such as a CPU that executes a program recorded in the storage unit 41 and controls and calculates the radio wave transmitter 4. The control unit 40 has a radio wave transmitting means 45.

The storage unit 41 stores a program for performing control and calculation of the radio wave transmitter 4 executed by the control unit 40. Further, the storage unit 41 stores in advance the identification information and the like of the radio wave transmitter 4 included in the radio wave transmitted by the wireless communication unit 42. The storage unit 41 can have a semiconductor memory such as RAM, ROM, and EPROM. Further, the storage unit 41 may have any type of storage device such as a flash memory, a magnetic storage device, and an optical storage device.

The wireless communication unit 42 transmits radio waves toward the door 6. As the wireless communication unit 42, a wireless module having a wireless communication interface such as BLE, ZigBee, or Wi-fi is used. The frequency of the radio wave transmitted by the wireless communication unit 42 is preferably large enough that the radio wave is not easily diffracted to the back side of the body by the body of the user 7, and the intensity of the transmitted radio wave passes through the body of the user 7. It is preferable that it is strong enough to do. The frequency of such radio waves can be, for example, ultra-high frequency waves, microwaves, millimeter waves, and submillimeter waves, and in particular, 2.4 GHz, which is the frequency of the BLE beacon.

Further, the radio wave transmitted by the wireless communication unit 42 preferably has directivity so as to be output only in the range around the door 6, but is not limited to this. For example, the radio wave transmitted by the wireless communication unit 42 may be spatially isotropically output.

The radio wave transmitting means 45 controls the wireless communication unit 42 to periodically transmit radio waves toward the door 6. The radio wave transmission cycle is preferably short enough to determine that the user 7 is facing the door 6, but if the radio wave transmission cycle is too short, the power consumption of the radio wave transmitter 4 increases. Therefore, the radio wave transmission cycle is preferably 0.1 to 10 seconds. Further, the radio wave transmitted by the radio wave transmitter 4 may include identification information unique to the radio wave transmitter 4, position information in which the radio wave transmitter 4 is arranged, and the like.

FIG. 3 is a flowchart showing the processing of the mobile terminal 2. The flowchart shown in FIG. 3 may be executed each time a radio wave is received from the radio wave transmitter 4, or may be executed at a predetermined cycle.

First, the stationary determination means 28 acquires detection information from the motion detection unit 23, and the user 7 holding the mobile terminal 2 is stationary based on the magnitude of the motion of the mobile terminal 2 shown in the acquired detection information. It is determined whether or not this is done (step S31). For example, the stationary determination means 28 determines that the user 7 is stationary when the state in which the magnitude of movement of the mobile terminal 2 is equal to or less than a predetermined threshold value continues for a certain period of time or longer. The resting state determined by the resting determination means 28 refers to a state in which the user 7 is not walking, and includes a state in which the user 7 has stopped, a state in which walking has gradually slowed down, and the like, and the like. The length of the fixed time can be, for example, 0.5 seconds to 2 seconds.

The rest determination means 28 repeats the rest determination until it is determined that the user 7 is stationary. As a result, the processing after step S32 is executed only when it is determined that the user 7 is stationary, so that the power consumption of the mobile terminal 2 is suppressed. The static determination in step S31 is not essential and can be omitted.

Next, the measuring means 25 measures the radio wave strength of the radio wave received from the radio wave transmitter 4 via the wireless communication unit 22, and stores the measured radio wave strength in the storage unit 21 (step S32). Since the radio wave is periodically transmitted from the radio wave transmitter 4, the radio communication unit 22 may receive the radio wave a plurality of times. Further, the measuring means 25 may measure the radio wave strength of the radio wave received a plurality of times, and may use the average value or the representative value of the radio wave strength as the measurement result.

Next, the determination means 26 determines whether or not the user 7 located in the predetermined space is facing the door 6 based on the received radio wave intensity (step S33). For example, when the measured radio wave intensity is equal to or less than a predetermined threshold value, the determination means 26 determines that the user 7 is facing the door 6, and if not, the user 7 is not facing the door 6. Is determined. The determination means 26 determines that the user 7 is facing the door 6 when the measured radio wave intensity decreases by a predetermined change width or more within a predetermined period, and if not, the user 7 determines. It may be determined that the door 6 is not suitable. Further, the determination means 26 determines that the user 7 is facing the door 6 when the radio wave intensity is equal to or less than a predetermined threshold value and the radio wave intensity decreases by a predetermined change width or more within a predetermined period. If this is not the case, it may be determined that the user 7 is not facing the door 6.

When the determination means 26 determines that the user 7 is facing the door 6 (“Yes” in step S33), the control unit 20 considers the user 7 to be an authenticated person and performs processing. The process proceeds to step S34. On the other hand, if it is not determined that the user 7 is facing the door 6 (“No” in step S33), the control unit 20 ends the process.

Next, the transmission means 27 transmits an authentication request signal including the ID information of the user 7 to the authentication device 3 (step S34). In the case of FIG. 1, the user 7a determined to be facing the door 6 is determined to be an authenticated person who has an intention to pass through the door 6, and is transmitted from the transmission means 27 of the mobile terminal 2 possessed by the user 7a. The authentication request signal is transmitted to the authentication device 3. On the other hand, the user 7b who is not determined to be facing the door 6 is determined not to be an authentication-requiring person who has an intention to pass through the door 6, and the authentication request signal is not transmitted from the transmission means 27 of the mobile terminal 2.

After that, when the authentication device 3 receives the authentication request signal and transmits a passage permission signal indicating that the passage of the door 6 is permitted to the mobile terminal 2, the control unit 20 transmits the passage permission signal via the wireless communication unit 22. Is received (step S35).

Next, the control unit 20 notifies the user 7 by displaying characters or making a sound on the display unit 24 that the passage of the door 6 is permitted (step S36), and ends the process.

FIG. 4 is a flowchart showing the processing of the authentication device 3. The flowchart shown in FIG. 4 may be executed each time a signal is received from the mobile terminal 2, or may be executed at a predetermined cycle.

First, the control unit 30 receives an authentication request signal from the mobile terminal 2 via the wireless communication unit 32 (step S41).

Next, the signal strength measuring means 37 measures the signal strength of the received authentication request signal (step S42).

Next, the neighborhood determination means 38 determines whether or not the user 7 is present in the vicinity of the door 6 based on the measured signal strength (step S43). For example, the neighborhood determination means 38 determines that the user 7 exists within a certain range from the authentication device 3 when the measured signal strength is equal to or higher than a predetermined threshold value. Here, the predetermined threshold value is set in advance as the signal strength when the distance between the mobile terminal 2 and the authentication device 3 is, for example, 1 to 2 m.

When it is determined that the user 7 exists in the vicinity of the door 6 (“Yes” in step S43), the control unit 30 shifts the process to step S44. On the other hand, if it is not determined that the user 7 exists in the vicinity of the door 6 (“No” in step S43), the control unit 30 ends the process. The neighborhood determination in step S43 is not essential and can be omitted.

Next, the authentication means 35 executes the authentication process of the user 7 by comparing the ID information included in the received authentication request signal with the ID information stored in advance in the storage unit 31 (step S44). The authentication means 35 has an intention of passing through the door 6 when the ID information of the user 7 included in the authentication request signal matches any of the ID information registered in advance in the storage unit 31. It is determined that the user is a legitimate user, and it is determined that the authentication is successful. On the other hand, in the authentication means 35, if the ID information of the user 7 included in the authentication request signal does not match any of the ID information registered in advance in the storage unit 31, the user 7 is not a legitimate user. Is determined, and it is determined that the authentication has failed.

If it is determined that the authentication is successful (“Yes” in step S44), the control unit 30 permits the user 7 to pass through the door 6 (step S45). On the other hand, if it is determined that the authentication has failed (“No” in step S44), the control unit 30 ends the process.

Next, the control unit 30 transmits an unlocking signal to the door 6 via the electric lock control unit 33 (step S46), and unlocks the electric lock of the door 6 for a certain period of time. Then, the control unit 30 transmits a passage permission signal indicating that the user 7 is permitted to pass through the door 6 to the mobile terminal 2 via the wireless communication unit 32 (step S47).

Next, the control unit 30 permits the user 7 to pass through the door 6 and transmits an entrance record signal indicating that the user 7 has entered the security area to the management device 5 via the management device communication unit 34. (Step S48). The entrance record signal includes the ID information of the user 7. The management device 5 adds area information, time information, and the like to the admission record information received from the authentication device 3, and registers the information in the database. The admission record information may be transmitted to the management device 5 each time the user 7 enters the security area, or may be transmitted collectively.

FIG. 5 is a diagram for explaining the radio wave intensity of the radio wave received from the radio wave transmitter 4 measured by the mobile terminal 2. FIG. 5A shows a user 7a trying to enter the security area from a public area and a user 7b just passing in front of the door 6. Further, FIG. 5B shows a radio wave intensity measurement waveform 401 measured by the mobile terminal 2a possessed by the user 7a and a radio wave intensity measurement waveform 402 measured by the mobile terminal 2b possessed by the user 7b. It is a graph which shows. The vertical axis of FIG. 5B shows the radio wave intensity received by the mobile terminals 2a and 2b, and the horizontal axis of FIG. 5B shows time.

The user 7a who has the intention of passing through the door 6 moves toward the door 6 from the position P0 on the left side in the figure at time T0. At this time, the measured waveform 401 of the radio wave intensity measured by the mobile terminal 2a gradually increases as the user 7a approaches the radio wave transmitter 4. After that, at time T1, the user 7a rotates his / her body at the position P1 in front of the door 6 and faces the door 6. At this time, the radio wave intensity measured by the mobile terminal 2a suddenly decreases to be equal to or less than a predetermined threshold value VTh. For example, according to the experiment performed for the present invention, the 2.4 GHz radio wave from the radio wave transmitter 4 is absorbed by the body of the user 7a and attenuated by about 15 to 30 dB.

On the other hand, the user 7b who does not intend to pass through the door 6 moves from the position P0 on the left side in the figure to the position P2 in front of the door 6 at time T0. At this time, the measured waveform 402 of the radio wave intensity measured by the mobile terminal 2b gradually increases as the user 7b approaches the radio wave transmitter 4. After that, at time T2, the user 7b passes the position P2 in front of the door 6 and moves to the position P3 on the right side in the figure at time T3. At this time, the radio wave intensity measured by the mobile terminal 2b gradually decreases as the user 7b moves away from the radio wave transmitter 4.

As described above, in the wireless communication range where wireless communication is possible between the mobile terminal 2 and the authentication device 3, the measured waveform 401 by the mobile terminal 2a becomes a threshold value VTh or less when the user 7a faces the door 6. The measured waveform 402 by the mobile terminal 2b does not become less than or equal to the threshold value VTh. The radio field intensity measured by the mobile terminal 2 is equal to or less than the threshold value VTh when the mobile terminal 2 is viewed from the position of the radio wave transmitter 4 as when the user 7a faces the door 6. Only if it is completely obscured by the body. Therefore, the mobile terminal 2 can determine that the user 7a is facing the door 6 when the measured radio wave intensity is equal to or less than a predetermined threshold value, and the user 7a intends to pass through the door 6. It can be determined that the person is a certified person.

Here, if the mobile terminal 2 is held at a position away from the body of the user 7a, even when the user 7a faces the door 6, when viewed from the position of the radio wave transmitter 4. The mobile terminal 2 is not completely obscured by the body of the user 7a. Therefore, it is preferable that the mobile terminal 2 is held so as to be in contact with the front surface of the body of the user 7a.

When the wireless communication range between the mobile terminal 2 and the authentication device 3 is wider than the reach of the radio wave transmitted from the radio wave transmitter 4, the position P3 shown in FIG. 5 (b) is located. As described above, the waveform 402 measured by the mobile terminal 2b may be equal to or less than the threshold value VTh. Therefore, in such a case, it is preferable to combine different conditions to determine whether or not the user 7a is facing the door 6.

Therefore, as shown in FIG. 5B, in the mobile terminal 2, the measured radio wave intensity is equal to or less than a predetermined threshold value, and the radio wave intensity decreases by a predetermined change width ΔV or more within a predetermined period ΔT. In this case, it is determined that the user 7a is facing the door 6. In this way, the radio wave intensity measured by the mobile terminal 2 sharply decreases when the mobile terminal 2 is viewed from the position of the radio wave transmitter 4, such as when the user 7a faces the door 6. Only when completely obscured by the body of user 7a.

Here, the predetermined period ΔT is set retroactively from the time when the radio wave intensity measured by the mobile terminal 2 becomes equal to or less than the predetermined threshold value. Alternatively, the predetermined period ΔT may be set retroactively from the time when the static determination or the proximity determination is performed, or may be set retroactively from the time when the measured radio field intensity starts to decrease.

As described above, the mobile terminal 2 determines whether or not the user 7 is suitable for the object to be authenticated based on the radio wave intensity of the radio wave transmitted from the radio wave transmitter 4. Then, only when it is determined that the user 7 is suitable for the object to be authenticated, the authentication request signal is transmitted to the authentication device 3. Since it is highly possible that the user 7 who is determined to be suitable for the authentication target in this way has an intention to use the authentication target, the mobile terminal 2 determines the authentication accuracy of the user 7. Can be improved.

Further, in the mobile terminal 2, the radio wave intensity of the radio wave received from the radio wave transmitter 4 by the mobile terminal 2 is equal to or less than a predetermined radio wave intensity threshold value, and the authentication request signal signal received by the authentication device 3 from the mobile terminal 2 is signaled. When the strength is equal to or higher than a predetermined threshold value, it can be determined that the user 7 is suitable for the authentication target in the vicinity of the authentication target.

Either the mobile terminal 2 or the authentication device 3 may perform the static determination shown in FIG. 3 or the proximity determination shown in FIG. When the neighborhood determination is performed by the mobile terminal 2, the mobile terminal 2 includes a neighborhood determination means. The authentication device 3 transmits a wireless signal to the mobile terminal 2, and the neighborhood determination means of the mobile terminal 2 determines whether the user 7 is present in the vicinity of the door 6 based on the signal strength measured by the transmitted wireless signal. Judge whether or not. Further, when the static determination is performed by the authentication device 3, the authentication device 3 includes a static determination means. The mobile terminal 2 transmits detection information to the authentication device 3, and the stationary determination means of the authentication device 3 is a mobile terminal based on the magnitude of movement of the mobile terminal 2 shown in the detection information transmitted from the mobile terminal 2. It is determined whether or not the user 7 holding the 2 is stationary.

Further, the neighborhood determination may be performed before the facing determination as to whether or not the user 7 is facing the door 6, or may be performed after the facing determination. Similarly, the stationary determination may be performed before the facing determination or after the facing determination. Further, the determination results of the neighborhood determination, the stationary determination, and the opposite determination may be included in one signal between the mobile terminal 2 and the authentication device 3 and transmitted / received together, or may be transmitted / received separately in a plurality of signals. good. In either case, the authentication device 3 executes the authentication process of the user 7 when the authentication request signal is received from the mobile terminal 2 and when all the necessary determination conditions are satisfied.

Further, in FIG. 3, the authentication system 1 determines whether or not the user 7 is facing the door 6 based on the reception strength of the radio wave received from the radio wave transmitter 4 by the mobile terminal 2, and requests authentication. Although the signal is transmitted, the present embodiment is not limited to this. For example, the authentication system 1 may transmit an authentication request signal based on a neighborhood determination as to whether or not the user 7 is present in the vicinity of the door 6, in addition to the facing determination. In this case, the mobile terminal 2 uses the user 7 when the radio wave intensity from the radio wave transmitter 4 is equal to or less than the threshold value of the predetermined radio wave intensity and the signal intensity of the radio signal is equal to or more than the threshold value of the predetermined signal intensity. Is determined to be facing the door 6 near the door 6 and transmits an authentication request signal.

Further, the authentication system 1 may transmit an authentication request signal based on a stationary determination as to whether or not the user 7 is stationary, in addition to the opposite determination. In this case, in the mobile terminal 2, when the radio wave intensity from the radio wave transmitter 4 is equal to or less than a predetermined threshold value and it is determined that the user 7 is stationary, the user 7 faces the door 6. It is determined that it is stationary and an authentication request signal is transmitted.

Further, the authentication request signal may be transmitted by combining the above-mentioned plurality of methods. By combining the plurality of conditions in this way, it is possible to determine with higher accuracy whether or not the user 7 has an intention to pass through the door 6. Further, for the user 7 who has the mobile terminal 2 on the security area side behind the door 6, it can be similarly determined whether or not the user 7 just passes in front of the door 6, so that it is so-called. It is also possible to suppress back-reading.

The above-mentioned embodiments are merely examples of embodiment in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from the technical idea or its main features.

For example, the authentication system 1 can not only determine whether or not the user is facing the door, but also determine, for example, whether or not the user is facing a terminal device such as a cash register or a vending machine. Is.

When the authentication device authenticates a user who is trying to purchase a product hands-free, if there are multiple users who have a mobile terminal in the vicinity of a cash register or a vending machine, etc., which user will use the authentication device to authenticate the product. I can't tell if I bought it, and I can't settle. Even in such a case, the authentication system 1 can determine whether or not the user is suitable for a cash register, a vending machine, or the like by the same method.

A user who is determined to be suitable for a cash register or a vending machine in this way is likely to have an intention to use an object to be authenticated. Therefore, according to the authentication system 1, the user's Authentication accuracy can be improved.

1 authentication system, 2, 2a, 2b mobile terminal, 3 authentication device, 4 radio wave transmitter, 5 management device, 6 doors, 7, 7a, 7b user, 20 control unit, 21 storage unit, 22 wireless communication unit, 23 Motion detection unit, 24 display unit, 25 measuring means, 26 judgment means, 27 transmitting means, 28 stationary judgment means, 30 control unit, 31 storage unit, 32 wireless communication unit, 33 electric lock control unit, 34 management device communication unit, 35 Authentication means, 37 Signal strength measuring means, 38 Neighborhood determination means, 40 Control unit, 41 Storage unit, 42 Wireless communication unit, 45 Radio wave transmitting means, 401 Measurement waveform, 402 Measurement waveform.

Claims (7)

An authentication system equipped with a radio wave transmitter, a mobile terminal held in front of the user's body, and an authentication device.
The radio wave transmitter is
It is arranged facing the authentication target with a predetermined space in between, and has a radio wave transmission means for transmitting radio waves toward the authentication target.
The mobile terminal is
A measuring means for measuring the radio wave intensity of the radio wave received from the radio wave transmitter, and
When the measured radio wave intensity is the radio wave intensity of the radio wave attenuated by the user's body located between the mobile terminal and the radio wave transmitter, the user located in the predetermined space A determination means for determining that the object is suitable for the certification object, and
It has a transmission means for transmitting an authentication request signal including the ID information of the user to the authentication device when it is determined that the user is suitable for the authentication target.
The authentication device is
A storage unit that stores the user's ID information,
When the authentication request signal is received from the mobile terminal, authentication for executing the authentication process of the user by comparing the ID information included in the authentication request signal with the ID information stored in advance in the storage unit. With means,
An authentication system characterized by that. The authentication system according to claim 1, wherein the determination means determines that the user is suitable for the authentication target when the radio wave intensity is equal to or less than a predetermined threshold value. The authentication system according to claim 1 or 2, wherein the determination means determines that the user is suitable for the authentication target when the radio wave intensity decreases by a predetermined change width or more within a predetermined period. .. The authentication device is attached to the authentication object and is attached to the authentication object.
One of the mobile terminal and the authentication device transmits a radio signal to the other of the mobile terminal and the authentication device.
The other has a neighborhood determination means for determining whether or not the mobile terminal is in the vicinity of the authentication target based on the signal strength of the radio signal received from the one.
One of claims 1 to 3, wherein the authentication means determines that the mobile terminal exists in the vicinity of the authentication target object, and executes the authentication process when the authentication request signal is received from the mobile terminal. The authentication system described in Section. The mobile terminal is
A motion detection unit that detects the motion of the mobile terminal,
Further, it has a stationary determination means for determining whether or not the user is walking based on the magnitude of the movement of the mobile terminal detected by the motion detection unit.
The authentication according to any one of claims 1 to 4, wherein the authentication means executes the authentication process when it is determined that the user is not walking and the authentication request signal is received from the mobile terminal. system. The subject to be certified is a regulatory means that physically regulates the movement from the first space to the second space.
The authentication system according to any one of claims 1 to 5, further comprising a deregulation unit for deregulating the regulation when it is determined by the authentication means that the authentication is successful. A mobile terminal held in front of the user's body,
A measuring means for measuring the radio wave intensity of a radio wave transmitted from a radio wave transmitter arranged facing an object to be authenticated across a predetermined space toward the object to be authenticated, and a measuring means.
When the measured radio wave intensity is the radio wave intensity of the radio wave attenuated by the user's body located between the mobile terminal and the radio wave transmitter, the user located in the predetermined space A determination means for determining that the object is suitable for the certification object, and
A transmission means for transmitting an authentication request signal including the user's ID information to the authentication device when it is determined that the user is suitable for the authentication target.
Mobile terminal with.

Images