JP7309943B2 - 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 performs authentication processing for a user who attempts to pass through a door that restricts entry to a security area, the user does not have to hold an ID card, etc. over a card reader installed near the door, hands-free. Some require user authentication.

For example, in the hands-free authentication system described in Patent Document 1, when a user possessing a mobile terminal such as a wireless tag approaches a door, the mobile terminal automatically stores the user's ID information and is installed near the door. 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 authenticates only users who are present near the door for which the measured signal strength is equal to or greater than a predetermined threshold. and unlock the door when the authentication is successful.

JP 2012-219483 A

However, with the technique described in Patent Document 1, although it is possible to determine whether or not the user is present in the vicinity of the door, it is sufficient to determine 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 Literature 1, users who only stand talking around the door or users who just pass in front of the door only have portable terminals and exist near the door. Then, authentication is automatically performed and the door is unlocked. As a result, the door may be unlocked unintentionally, allowing a third party to pass through the door, or authentication may be performed even though the user has not passed through the door, and the user may enter the security area. It will be recorded that you have entered, and you will not be able to perform correct entry/exit management.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an authentication system and a portable terminal capable of improving user authentication accuracy.

According to one aspect of the present invention for solving such problems, there is provided an authentication system comprising a radio wave transmitter, a mobile terminal held in front of a user's body, and an authentication device, wherein the radio wave transmitter a radio wave transmitting means arranged to face the object to be authenticated with a predetermined space therebetween and transmitting radio waves to the object to be authenticated; determination means for determining whether or not the user located in a predetermined space is facing the authentication object based on the radio wave intensity; and determination that the user is facing the authentication object transmitting means for transmitting an authentication request signal containing the user's ID information to the authentication device when the user's ID information is received, and the authentication device includes a storage unit for storing the user's ID information; and authentication means for performing user authentication processing by comparing ID information included in the authentication request signal with ID information pre-stored in the storage unit when the request signal is received.

Preferably, the determining means determines that the user is facing the authentication object when the radio wave intensity is equal to or less than a predetermined threshold.

Preferably, the determining means determines that the user is facing the authentication object when the radio wave intensity decreases by a predetermined range of change or more within a predetermined period.

The authentication device is attached to the object to be authenticated, and one of the mobile terminal and the authentication device transmits a radio signal to the other of the mobile terminal and the authentication device, It further has proximity determination means for determining whether or not the terminal exists in the vicinity of the authentication object, and the authentication means receives an authentication request signal from the mobile terminal when it is determined that the mobile terminal exists in the vicinity of the authentication object. It is preferable to execute the authentication process when the

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

The object to be authenticated is a restriction means that physically restricts the movement from the first space to the second space, and the authentication device is a restriction that cancels the restriction when the authentication is determined to be successful by the authentication means. It is preferable to further have a releasing part.

Further, according to another aspect of the present invention, a mobile terminal held in front of a user's body includes a radio wave transmitter arranged facing an authentication target with a predetermined space therebetween. measuring means for measuring the intensity of radio waves transmitted toward an object; determining means for determining whether or not a user located in a predetermined space is facing an object to be authenticated based on the intensity of the radio waves; a transmission means for transmitting an authentication request signal containing the ID information of the user to the authentication device when it is determined that the person is facing the authentication object.

ADVANTAGE OF THE INVENTION According to this invention, the authentication system and portable terminal which can improve a user's authentication precision are provided.

It is a figure showing roughly composition of an authentication system concerning a 1st embodiment. 2 is a block diagram showing configurations of a mobile terminal, an authentication device, and a radio wave transmitter in the authentication system according to the first embodiment; FIG. 4 is a flow chart showing processing of a mobile terminal in the authentication system according to the first embodiment; 4 is a flow chart showing processing of an authentication device in the authentication system according to the first embodiment; FIG. 4 is a diagram for explaining the radio wave intensity of radio waves received from a radio wave transmitter measured by the mobile terminal of the authentication system according to the first embodiment;

Preferred embodiments of the present invention will be described below with reference to the drawings. It should be noted that the present invention is not limited to the following embodiments, and can be modified as appropriate without departing from the scope of the invention. Also, in each figure, the same reference numerals are given to the parts having the same or corresponding functions, and the explanation thereof may be omitted or simplified.

[First embodiment]
FIG. 1 is a diagram schematically showing the configuration of an authentication system 1 according to the first embodiment. FIG. 1(a) is a diagram of the authentication system 1 viewed from the front side of the door 6. FIG. FIG. 1B is a diagram of the authentication system 1 viewed from above the door 6. As shown in FIG. An 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) possessing mobile terminals 2. As shown in FIG. The user 7a faces the door 6 to enter the security area hands-free. On the other hand, the user 7b is just about to pass in front of the door 6. As seen from the user 7a, the front side of the door 6 is the public area, and the other side of the door 6 is the security area. Entry from the public area to the security area is regulated by a door 6 . The door 6 is locked in a normal state, and locking/unlocking of the door 6 is controlled by an authentication device 3 provided near the door 6 .

Here, exit of the user 7 from the security area to the public area is not particularly restricted in this embodiment. When exiting the security area, the locking and unlocking of the door 6 may be restricted in the same manner as when entering the security area, or the door 6 may be freely passable. In addition, the means for regulating the passage of the user 7 may be other than the door 6. For example, the physical movement of the user 7 from the first space to the second space adjacent to the first space within a predetermined area may be physically prevented. A flapper-type security gate or an automatic door that controls opening and closing may be used. Also, the user 7 may be, for example, a robot or the like other than a person.

The authentication system 1 performs authentication processing for the user 7a who intends to pass through the door 6, and does not perform authentication processing for the user 7b who does not intend to pass through the door 6. It is determined whether or not the persons 7a and 7b are facing the door 6. Specifically, it is determined whether the front surfaces of the users 7a and 7b are facing the door 6 or not.

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

The authentication device 3 authenticates the user 7 . Although the authentication device 3 in FIG. 1 is provided on the door 6, this embodiment is not limited to this. The authentication device 3 may be provided in addition to the door 6, and may be provided side by side with the door 6 such as a wall surface, a ceiling, or a floor around the door 6. - 特許庁

The radio wave transmitter 4 is arranged to face the door 6 across 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 placed anywhere on the ceiling, wall, ground or the like as long as it faces the door 6 across a predetermined space.

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

FIG. 2 is a block diagram showing 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. 2(a) shows the configuration of the mobile terminal 2. As shown in FIG. The mobile terminal 2 includes a control section 20 , a storage section 21 , a wireless communication section 22 , a motion detection section 23 and a display section 24 .

The control unit 20 is a processor such as a CPU (Central Processing Unit) that executes programs recorded in the storage unit 21 and controls the mobile terminal 2 and performs calculations. The control unit 20 has measurement means 25 , determination means 26 , transmission means 27 , and stationary determination means 28 .

The storage unit 21 stores programs for controlling the mobile terminal 2 and performing calculations, which are executed by the control unit 20 . In addition, the storage unit 21 stores in advance ID information of the user 7 possessing the mobile terminal 2, identification information of the authentication device 3, 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 employee number given 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 . Furthermore, 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 RAM (Random Access Memory), ROM (Read Only Memory), EPROM (Erasable Programmable ROM). Also, the storage unit 21 may have any type of storage device such as a flash memory, a magnetic storage device, an optical storage device, or the like.

The wireless communication unit 22 performs wireless communication with the authentication device 3 . Also, the wireless communication unit 22 receives radio waves 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 wireless module used for wireless communication between the wireless communication unit 22 and the authentication device 3 and the wireless module used for receiving the radio wave from the radio wave transmitter 4 are of the same type, the radio waves of both are Identification information may be included in each radio wave to distinguish them. 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 advance in the storage unit 21. 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, a GPS (Global Positioning System), a gyro sensor, an acceleration sensor, or an indoor positioning system such as IMES (Indoor Messaging System) included in 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 to notify the user 7 of the information.

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

The control unit 30 is a processor such as a CPU that executes programs recorded in the storage unit 31 and controls the authentication device 3 and performs calculations. The control unit 30 has authentication means 35 , signal strength measurement means 37 and proximity determination means 38 .

The storage unit 31 stores programs for controlling the authentication device 3 and performing calculations, which are executed by the control unit 30 . In addition, the storage unit 31 stores in advance ID information of the user 7 who owns the mobile terminal 2, identification information of the mobile terminal 2, and the like. Furthermore, the storage unit 31 may store entry record information indicating that the user 7 is permitted to enter. The storage unit 31 can have a semiconductor memory such as RAM, ROM, EPROM. Also, the storage unit 31 may have any type of storage device such as a flash memory, a magnetic storage device, an optical storage device, or the like.

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 the storage unit 31 in advance. 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 that controls locking and unlocking of the electric lock of the door 6 . A 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 is connected to the management device 5 wirelessly or by wire through a local network, a wide area network, or the like, and has a communication interface circuit that communicates with the management device 5 . Note that the wireless communication unit 32 may be used instead of the management device communication unit 34 for communication between the authentication device 3 and the management device 5 .

FIG. 2(c) shows the configuration of the radio wave transmitter 4. As shown in FIG. The radio wave transmitter 4 includes a control section 40 , a storage section 41 and a wireless communication section 42 .

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

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

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 waves transmitted by the wireless communication unit 42 is preferably high enough to prevent the radio waves from being diffracted by the body of the user 7 to the back side of the body. It is preferable to be strong enough to do so. The frequency of such radio waves can be, for example, ultra-high frequency waves, microwaves, millimeter waves, or submillimeter waves, and in particular, can be 2.4 GHz, which is the frequency of BLE beacons.

Moreover, it is preferable that the radio waves transmitted by the wireless communication unit 42 have directivity so that they are output only to the range around the door 6, but the present invention is not limited to this. For example, the radio waves transmitted by the wireless communication unit 42 may be output spatially isotropically.

The radio wave transmitting means 45 controls the radio communication section 42 to periodically transmit radio waves toward the door 6 . It is preferable that the radio wave transmission cycle is 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, it is preferable that the transmission cycle of radio waves is 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, positional information of the radio wave transmitter 4, or the like.

FIG. 3 is a flow chart showing 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 unit 28 acquires detection information from the motion detection unit 23, and determines whether the user 7 holding the mobile terminal 2 is stationary based on the magnitude of the motion of the mobile terminal 2 indicated by the acquired detection information. It is determined whether or not (step S31). For example, the stationary determination unit 28 determines that the user 7 is stationary when the magnitude of motion of the mobile terminal 2 is equal to or less than a predetermined threshold for a certain period of time or longer. The stationary state determined by the stationary determination means 28 refers to a state in which the user 7 is not walking, and includes a state in which the user 7 stops, a state in which walking gradually slows down and is about to stop, and the like. The length of the certain period of time can be, for example, 0.5 seconds to 2 seconds.

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

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

Next, the determining means 26 determines whether or not the user 7 located in a predetermined space is facing the door 6 based on the received radio wave intensity (step S33). For example, the determination means 26 determines that the user 7 is facing the door 6 when the measured radio wave intensity is equal to or less than a predetermined threshold value, and otherwise determines that the user 7 is not facing the door 6. I judge. Note that 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 otherwise determines that the user 7 is facing the door 6. It may be determined that the door 6 is not facing. Further, the determining 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. , otherwise, 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 regards the user 7 as a person requiring authentication, and starts the process. 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 section 20 terminates the process.

Next, the transmitting means 27 transmits an authentication request signal containing 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 authentication-required person who intends to pass through the door 6. An authentication request signal is sent to the authentication device 3 . On the other hand, the user 7b who is not determined to face the door 6 is determined not to be an authentication required person who intends to pass through the door 6, and the transmitting means 27 of the portable terminal 2 does not transmit an authentication request signal.

After that, when the authentication device 3 receives the authentication request signal and transmits to the portable terminal 2 a passage permission signal indicating that passage through the door 6 is permitted, 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 that passage through the door 6 is permitted by displaying characters on the display unit 24 or by generating a sound (step S36), and ends the process.

FIG. 4 is a flow chart showing 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 predetermined intervals.

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 proximity determining means 38 determines whether or not the user 7 exists near the door 6 based on the measured signal strength (step S43). For example, the proximity 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 greater than a predetermined threshold. 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 near 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 near the door 6 ("No" in step S43), the control section 30 terminates the process. Note that the proximity determination in step S43 is not essential and can be omitted.

Next, the authentication means 35 performs authentication processing of the user 7 by comparing the ID information included in the received authentication request signal and the ID information stored in advance in the storage unit 31 (step S44). The authentication means 35 indicates that the user 7 intends to pass 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 the storage unit 31 in advance. It determines that the user is valid, and determines that the authentication has succeeded. On the other hand, if the ID information of user 7 included in the authentication request signal does not match any of the ID information registered in advance in storage unit 31, authentication means 35 determines that user 7 is not an authorized user. and determines that the authentication has failed.

When it is determined that the authentication has succeeded ("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 terminates 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. Then, the control unit 30 transmits to the portable terminal 2 a passage permission signal indicating that the user 7 is permitted to pass through the door 6 via the wireless communication unit 32 (step S47).

Next, the control unit 30 transmits an entry record signal indicating that the user 7 has entered the security area by permitting the user 7 to pass through the door 6 to the management device 5 via the management device communication unit 34. (step S48). This entry record signal contains the ID information of the user 7 . The management device 5 adds area information, time information, etc. to the entry record information received from the authentication device 3, and registers it in the database. The entry 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 and measured by the mobile terminal 2. As shown in FIG. FIG. 5(a) shows a user 7a trying to enter the security area from the public area and a user 7b just passing in front of the door 6. FIG. FIG. 5B shows a measured waveform 401 of radio wave intensity measured by the mobile terminal 2a owned by the user 7a and a measured waveform 402 of the radio wave intensity measured by the mobile terminal 2b owned by the user 7b. is a graph showing The vertical axis of FIG. 5(b) indicates the intensity of radio waves received by the mobile terminals 2a and 2b, and the horizontal axis of FIG. 5(b) indicates time.

A user 7a who intends to pass through the door 6 moves toward the door 6 from a position P0 on the left side in the drawing at time T0. At this time, the measured waveform 401 of the radio wave intensity measured by the portable terminal 2a gradually increases as the user 7a approaches the radio wave transmitter 4. FIG. After that, at time T1, the user 7a rotates his/her body at the position P1 in front of the door 6 to face the door 6. As shown in FIG. At this time, the radio wave intensity measured by the mobile terminal 2a sharply decreases to be equal to or less than the predetermined threshold value VTh. For example, according to experiments conducted for the present invention, the 2.4 GHz radio waves from the radio transmitter 4 are absorbed by the body of the user 7a and attenuated by approximately 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 toward 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 portable terminal 2b gradually increases as the user 7b approaches the radio wave transmitter 4. FIG. After that, at time T2, the user 7b passes the position P2 in front of the door 6, and at time T3, moves to a position P3 on the right side in the drawing. 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. FIG.

As described above, within a wireless communication range where wireless communication is possible between the mobile terminal 2 and the authentication device 3, the waveform 401 measured by the mobile terminal 2a becomes less than or equal to the threshold value VTh when the user 7a faces the door 6. , the waveform 402 measured by the portable terminal 2b does not fall below the threshold value VTh. The reason why the radio wave intensity measured by the mobile terminal 2 is equal to or lower than the threshold value VTh is that the mobile terminal 2 is located near the user 7a when viewed from the position of the radio wave transmitter 4, such as when the user 7a faces the door 6. only if it is completely obscured by the body of the Therefore, the portable 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 has an intention to pass through the door 6. It can be determined that the person requires authentication.

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

If the wireless communication range between the mobile terminal 2 and the authentication device 3 is as wide as or wider than the reach of the radio wave transmitted from the radio wave transmitter 4, the position P3 shown in FIG. As shown, the waveform 402 measured by the mobile terminal 2b may be less than or equal to the threshold VTh. Therefore, in such a case, it is preferable to determine whether or not the user 7a faces the door 6 by combining different conditions.

Therefore, as shown in FIG. 5B, the mobile terminal 2 detects that the measured radio wave intensity is equal to or less than a predetermined threshold value, and that the radio wave intensity has decreased 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. The reason why the radio wave intensity measured by the mobile terminal 2 suddenly decreases is that the mobile terminal 2 is at the position of the radio transmitter 4, such as when the user 7a faces the door 6. Only when completely covered by the body of the user 7a.

Here, the predetermined period ΔT is set retroactively from the point in time when the radio wave intensity measured by the mobile terminal 2 becomes equal to or less than a predetermined threshold. Alternatively, the predetermined period ΔT may be set retroactively from the time point when the stationary determination or proximity determination is performed, or may be retroactively set from the time point when the measured radio wave intensity begins to decrease.

As described above, the mobile terminal 2 determines whether or not the user 7 is facing the authentication object based on the radio field intensity of the radio waves transmitted from the radio wave transmitter 4 . Then, an authentication request signal is transmitted to the authentication device 3 only when it is determined that the user 7 faces the authentication object. Since there is a high possibility that the user 7 who is determined to be suitable for the authentication object has the intention of using the authentication object, the mobile terminal 2 determines the authentication accuracy of the user 7. can be improved.

In addition, the mobile terminal 2 is configured such that the radio wave intensity of the radio wave received by the mobile terminal 2 from the radio wave transmitter 4 is equal to or less than a predetermined radio wave intensity threshold, and the authentication request signal received by the authentication apparatus 3 from the mobile terminal 2 is If the intensity is equal to or greater than a predetermined threshold, it can be determined that the user 7 is near the authentication object and is facing the authentication object.

Either the mobile terminal 2 or the authentication device 3 may perform the stationary determination shown in FIG. 3 or the proximity determination shown in FIG. When proximity determination is performed by the mobile terminal 2, the mobile terminal 2 is provided with proximity determination means. The authentication device 3 transmits a radio signal to the mobile terminal 2, and the proximity determination means of the mobile terminal 2 determines whether the user 7 exists in the vicinity of the door 6 based on the signal strength of the transmitted radio signal. determine whether or not Further, in the case where the authentication device 3 performs the stillness determination, the authentication device 3 is provided with the stillness determination means. The mobile terminal 2 transmits the detection information to the authentication device 3, and the stillness determination means of the authentication device 3 determines whether the mobile terminal It is determined whether or not the user 7 holding 2 is stationary.

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

3, the authentication system 1 determines whether or not the user 7 is facing the door 6 based on the strength of the radio waves received by the mobile terminal 2 from the radio wave transmitter 4, and requests authentication. Although the signal is transmitted, this embodiment is not limited to this. For example, the authentication system 1 may transmit the authentication request signal based on proximity determination of whether or not the user 7 exists around the door 6 in addition to the facing determination. In this case, when the radio wave intensity from the radio wave transmitter 4 is equal to or less than a predetermined radio wave intensity threshold and the signal strength of the radio signal is equal to or more than a predetermined signal intensity threshold, the mobile terminal 2 is near the door 6 and faces the door 6, and transmits an authentication request signal.

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

Furthermore, the authentication request signal may be transmitted by combining a plurality of methods described above. By combining a plurality of conditions in this way, it is possible to more accurately determine whether or not the user 7 has the intention of passing through the door 6 . Also, for the user 7 holding the portable terminal 2 behind the door 6 on the security area side, it is possible to similarly determine whether or not the user 7 is just passing in front of the door 6. Back reading can also be suppressed.

All of the above-described embodiments merely show specific examples for carrying out the present invention, and the technical scope of the present invention should not be construed to be limited by these. That is, the present invention can be embodied in various forms without departing from its technical concept or main features.

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

When the authentication device authenticates a user who is going to purchase a product hands-free, if there are multiple users with mobile terminals near the cash register or vending machine, the authentication device can identify which user purchased the product. Unable to determine whether the item was purchased or not, and unable to make payment. Even in such a case, the authentication system 1 can determine whether or not the user is suitable for cash registers, vending machines, or the like, by the same method.

Since there is a high possibility that a user who is determined to be suitable for a cash register or a vending machine in this way has the intention of using the object to be authenticated, 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 door 7, 7a, 7b user 20 control unit 21 storage unit 22 wireless communication unit 23 motion detection unit 24 display unit 25 measurement unit 26 determination unit 27 transmission unit 28 stationary determination unit 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 measurement means, 38 proximity determination means, 40 control section, 41 storage section, 42 wireless communication section, 45 radio wave transmission means, 401 measured waveform, 402 measured waveform.

Claims (6)

An authentication system comprising a radio wave transmitter, a mobile terminal held in front of the user's body so as to be in contact with the user's body, and an authentication device attached to an authentication target,
The radio wave transmitter is
having a radio wave transmitting means disposed facing the authentication object across a predetermined space and transmitting radio waves toward the authentication object;
The mobile terminal is
measuring means for measuring the radio wave strength of the radio wave received from the radio transmitter and the signal strength of the radio signal received from the authentication device;
determination means for determining whether or not the user located in the predetermined space is facing the authentication object around the authentication object based on the radio wave intensity and the signal intensity;
transmitting means for transmitting an authentication request signal including ID information of the user to the authentication device when it is determined that the user faces the authentication object;
The authentication device
a storage unit that stores the ID information of the user;
Authentication for executing authentication processing of a user by comparing ID information included in the authentication request signal with ID information pre-stored in the storage unit when the authentication request signal is received from the mobile terminal having a means for
An authentication system characterized by: When the relationship between the radio wave intensity and the signal intensity indicates that the radio wave is attenuated by the user's body located between the mobile terminal and the radio wave transmitter, the determination means 2. The authentication system according to claim 1, wherein it is determined that said user positioned in a predetermined space faces said authentication object around said authentication object. When the measured signal strength is equal to or less than a first threshold and the measured signal strength is equal to or more than a second threshold, the determination means determines whether the user located in the predetermined space is in the vicinity of the authentication object. 3. The authentication system according to claim 1, wherein the authentication system determines that the object is facing the authentication target. The mobile terminal is
a motion detection unit that detects motion of the mobile terminal;
stillness determination means for determining whether or not the user is walking based on the magnitude of movement of the mobile terminal detected by the movement detection unit;
4. The authentication according to any one of claims 1 to 3, wherein said authentication means executes said authentication processing when it is determined that said user is not walking and said authentication request signal is received from said mobile terminal. system. The object to be authenticated is a restricting means for physically restricting movement from the first space to the second space,
5. The authentication system according to any one of claims 1 to 4, wherein said authentication device further comprises a restriction release unit that releases said restriction when said authentication means determines that authentication has succeeded. A mobile terminal held in front of the user's body so as to be in contact with the user's body ,
A radio wave intensity of a radio wave transmitted toward the authentication object from a radio wave transmitter arranged facing the authentication object across a predetermined space, and transmitted from an authentication device installed alongside the authentication object. measuring means for measuring the signal strength of a radio signal;
determination means for determining whether or not the user located in the predetermined space is facing the authentication object around the authentication object based on the radio wave intensity and the signal intensity;
a transmitting means for transmitting an authentication request signal including ID information of the user to the authentication device when it is determined that the user faces the authentication object;
A mobile terminal with

Images