JP4349333B2 - Electric lock system - Google Patents

Description

  The present invention relates to an electric lock system.

  Conventionally, an electric lock system as shown in Patent Document 1 has been used in ordinary houses and the like. This electric lock system is a reader device that reads ID code information from a non-contact ID tag by performing data communication by electromagnetic induction between the non-contact ID tag in which individual ID code information is written and the non-contact ID tag And an electric lock drive unit that locks or unlocks the electric lock provided on the entrance door, and when the ID code information read by the reader device matches the pre-registered ID code information, the electric lock drive unit It is comprised with the electric lock control apparatus which locks or unlocks.

  In this electric lock system, when a housekeeper who has gone out approaches the entrance of a building with a non-contact ID tag and enters the communication area of the reader device, the non-contact ID tag is not electromagnetically induced between the reader device and the non-contact ID tag. Data communication is performed by contact, and the reader device reads the ID code information written in the non-contact ID tag and outputs it to the electric lock control device. In the electric lock control device, the ID code information input from the reader device is collated with the ID code information registered in advance, and if the ID code information input from the reader device is registered, the electric lock is fixed. Since unlocking is performed after unlocking for a period of time, a householder can enter the house while the electric lock is unlocked.

By the way, in this electric lock system, there is a problem that power consumption is large because a radio wave is always transmitted from the reader device and a response from the non-contact ID tag entering the communication area is waiting to be received. Therefore, a human body detection sensor is provided to detect the presence or absence of a person in the detection area set near the entrance of the building. When this human body detection sensor does not detect a human body, the reader device stops transmitting radio waves and detects human bodies 2. Description of the Related Art Conventionally, an electric lock system that reduces the power consumption of a reader device by transmitting data by electromagnetic induction with a non-contact ID tag when the reader device detects a human body and performing electromagnetic communication with a non-contact ID tag has been conventionally used. More proposed.
Japanese Patent Laid-Open No. 11-161747

  In the latter electric lock system described above, when the communication distance between the reader device and the non-contact ID tag is short, the user must take out the non-contact ID tag one by one and bring the non-contact ID tag close to the reading unit of the reader device. There was a problem that it was not easy to use. Therefore, by increasing the transmission power of the reader device and extending the communication distance, non-contact communication between the reader device and the non-contact ID tag can be performed without bringing the non-contact ID tag close to the reader unit of the reader device. However, in this case, the following problems occur.

  That is, when a housekeeper with a non-contact ID tag enters the house when returning home and the electric lock controller locks the electric lock, the housekeeper stays at the entrance, that is, while in the communication area of the reader device. Non-contact communication is possible between the reader device and the non-contact ID tag. Therefore, when a suspicious person who has followed the family member stands in front of the entrance door during this period, the human body detection sensor detects the suspicious person, and the reader device transmits a radio wave triggered by the detection of the suspicious person. At this time, since there is a non-contact ID tag owned by the householder in the communication area of the reader device, non-contact communication is performed between the reader device and the non-contact ID tag owned by the householder to read the ID code information. Therefore, there is a possibility that the electric lock control device unlocks the electric lock by the electric lock driving unit.

  The present invention has been made in view of the above problems, and the purpose of the present invention is to unlock the electric lock by erroneously detecting the responder of the housekeeper after entering the house. It is an object of the present invention to provide an electric lock system that prevents the occurrence of a lock.

In order to achieve the above-mentioned object, the invention according to claim 1 distinguishes from the responder by performing contactless communication between the responder in which individual identification information is registered in advance and the responder in the communication area. An interrogator equipped with a non-contact communication unit for acquiring information and an electric lock drive unit for locking or unlocking an electric lock provided on the door, and the identification information acquired by the interrogator is registered in advance as identification information And an electric lock control device that locks the electric lock after the electric lock driving unit is unlocked by the electric lock driving unit and holds the locked state until a predetermined first holding time elapses from the time of locking . Provided with an unlocking operation unit that generates an unlocking signal in response to an operation, and a signal transmission unit having a communication distance longer than that of the non-contact communication unit. An unlock signal is sent from the signal transmitter, and the interrogator A signal receiving unit for receiving the identification information and the unlocking signal transmitted from the signal transmitting unit of the tester. In the electric lock control device, when the signal receiving unit of the interrogator receives the identification information and the unlocking signal, it is received. When the identification signal matches the previously registered identification information, the electric lock is unlocked by the electric lock drive unit according to the unlock signal and then locked, and the lock is set longer than the first holding time from the time of locking. The locked state is held until the predetermined second holding time has elapsed .

According to the present invention, even if a householder with a responder enters the house and the electric lock is locked, even if the householder stays in the communication area until the holding time elapses, the electric lock Since the control device holds the locked state during this period, it is possible to prevent the electric lock from being unlocked because the interrogator has obtained the identification information from the responder possessed by the householder. In addition, a signal transmission unit having a communication distance longer than that of the non-contact communication unit is provided in the responder, and by operating the unlocking operation unit of the responder, the identification signal and the unlock signal are transmitted from the signal transmission unit. Since the lock can be unlocked, the electric lock can be unlocked from a distance, and the person with the responder can quickly open the door without waiting for the electric lock to unlock in front of the door. You can get in through.

  According to the invention of claim 1, even if a householder with a responder enters the house and the household locker stays in the communication area until the holding time elapses after the electric lock is locked. Since the electric lock control device holds the locked state during this period, it is possible to prevent the electric lock from being unlocked because the interrogator has obtained the identification information from the responder possessed by the householder.

In addition , a signal transmission unit having a communication distance longer than that of the non-contact communication unit is provided in the responder, and by operating the unlocking operation unit of the responder, the identification signal and the unlock signal are transmitted from the signal transmission unit. Since the lock can be unlocked, the electric lock can be unlocked from a distance, and the person with the responder can quickly open the door without waiting for the electric lock to unlock in front of the door. You can get in through.

  Embodiments of the present invention will be described below with reference to the drawings. The electric lock system of this embodiment is a system for locking or unlocking an electric lock installed on a door, for example, a front door of a house, and as shown in the block diagram of FIG. A reader device 2 (interrogator), a portable transmitter 3 (response device), an approach detection device 4, and an electric lock 5 are provided as main components.

  The electric lock control device 1 includes a CPU 10, a data transmission / reception unit 11 that performs data communication between the reader device 2 and the approach detection device 4, and an electric lock 5 provided on the entrance door according to a control signal input from the CPU 10. And an electric lock drive unit 12 that locks or unlocks.

  The reader device 2 modulates and amplifies the CPU 20, the signal input from the CPU 20, and transmits the electromagnetic wave through the antenna 21a including the coil L1 and the capacitor C1, and the antenna 22a. A low-power receiving module 22 (signal receiving unit) that receives a specific low-power wireless signal, a data transmitting / receiving unit 23 that performs data communication with the electric lock control device 1, and a buzzer unit 24.

  The portable transmitter 3 receives a signal by electromagnetic induction via an antenna 31a composed of a CPU 30, a coil L2 and a capacitor C2, and demodulates the received signal, and an antenna 32a. A low power transmission module 32 (signal transmission unit) for transmitting a specific low power wireless signal, an encryption processing unit 33 for encrypting a transmission signal, an operation SW 34 (unlocking operation unit) for performing an unlocking operation, And a battery 35 for supplying power to the internal circuit. Further, individual identification information is set in advance in the portable transmission device 3 and stored in a memory (not shown). Here, compared with the non-contact communication part comprised by LF band transmission IC21 and LF band reception IC31, the communication distance of the low power reception module 22 and the low power transmission module 32 is long, and the non-contact communication part of Low power communication can be performed from outside the communication area.

  The approach detection device 4 is for detecting a person approaching the entrance door where the electric lock 5 is installed outside the house, and sends signals to the CPU 40, the human detection unit 41, and the electric lock control device 1. A data transmission unit 42 for transmission. The human detection unit 41 includes a pyroelectric sensor that detects the presence or absence of a person by detecting heat rays radiated from the human body, for example, and detects the presence or absence of a person in a detection area set near the entrance door outside the house. To do. In the detection area of the human detection unit 41, non-contact communication can be performed by the above-described non-contact communication unit (consisting of the LF band transmission IC 21 and the LF band reception IC 31).

  The electric lock system of the present embodiment has the above-described configuration, and the operation of this electric lock system will be described with reference to the flowchart of FIG. In a state where a family member with the portable transmission device 3 does not exist within the detection area of the approach detection device 4, the CPU 20 of the reader device 2 does not transmit radio waves from the LF band transmission IC 21, and the reader device 2 is in a standby state. (S1). In the standby state, the electric lock 5 is locked by the electric lock control device 1.

  In this standby state, when a householder with the portable transmitter 3 enters the detection area of the approach detection apparatus 4, the human detection unit 41 detects the householder (S2), and the CPU 40 generates a detection signal, A detection signal is transmitted from the data transmission unit 42 to the electric lock control device 1. In the electric lock control device 1, when the data transmission / reception unit 11 receives the detection signal transmitted from the proximity detection device 4, the detection signal is transferred to the reader device 2, and the detection signal of the proximity detection device 4 is transferred to the electric lock control device. 1 is transmitted to the reader device 2 via 1 (S3). In the reader device 2, when the data transmission / reception unit 23 receives the detection signal transmitted from the approach detection device 4, the CPU 20 generates an activation signal triggered by reception of the detection signal, and the LF band transmission IC 21 modulates this activation signal. Amplified and transmitted as an LF band radio signal via the antenna 21a (S4). When the LF band receiving IC 31 of the portable transmitter 3 of the householder receives the activation signal, the CPU 30 reads out its own identification information (ID code information) from the memory, encrypts it by the encryption processing unit 33, Transmission is performed from the power transmission module 32 (S5). At this time, in the reader device 2, the low power module 22 receives the encrypted identification information, and the CPU 20 causes the data transmission / reception unit 23 to transmit the received identification information to the electric lock control device 1 (S6). In the electric lock control device 1, when the data transmitting / receiving unit 11 receives the identification information transmitted from the reader device 2, the CPU 10 decodes the received identification information, compares it with the identification information registered in advance in the memory, Authentication is performed (S7).

  As a result of the ID authentication, if the identification information transmitted from the reader device 2 matches the identification information registered in the memory (authentication OK), the CPU 10 unlocks the electric lock 5 by the electric lock driving unit 12 (S8). ), A time limit operation for a predetermined unlocking time is started by the built-in timer 13, and the unlocked state is maintained until the time limit for the unlocking time ends (S9). When the timer 13 expires, the CPU 10 causes the electric lock 5 to be locked by the electric lock driving unit 12 (S10), and then starts a time limit operation for a predetermined holding time (for example, 5 seconds to 30 seconds) by the timer 13. The locked state is maintained until the holding time expires (S11), and when the holding time expires, the standby state is restored (S12). Note that the unlocking time is set to a short time that is expected to be necessary until the person closes the door after opening the door. In this embodiment, the unlocked state is locked after being held for a certain period of time. However, after the CPU 10 unlocks the electric lock 5 by the electric lock driving unit 12, an opening / closing sensor (not shown) detects opening / closing of the door. The electric lock 5 may be locked after detecting that the door is closed.

  On the other hand, if the identification information transmitted from the reader device 2 does not match the identification information registered in the memory (authentication NG) as a result of the ID authentication, the CPU 10 transmits an error signal from the data transmitting / receiving unit 11 to the reader device 2. At this time, in the reader device 2, the data transmission / reception unit 23 receives the error signal transmitted from the electric lock control device 1, and the CPU 20 sounds the buzzer unit 24 according to the error signal (S 13). The person in front can be informed that the authentication has failed, and after returning to the buzzer, the process returns to the standby state of S1 (S14).

  As described above, in the present embodiment, when the ID authentication is successful, the electric lock control device 1 unlocks the electric lock 5 for a predetermined unlocking time, locks the electric lock 5 when the unlocking time has elapsed, and The locked state is maintained until a predetermined holding time elapses from the time of locking, and the above holding time is set after the householder with the portable transmission device 3 enters the house and the electric lock 5 is locked. Even if the householder stays in the communication area of the reader device 2 until the elapse of time, the electric lock control device 1 maintains the locked state during this period. Since the reader device 2 reads the identification information, it is possible to prevent the electric lock from being unlocked, and it is possible to prevent a suspicious person who has followed the householder from entering the house.

  Incidentally, in the flowchart of FIG. 2, the operation in the case where the reader device 2 reads the identification information from the portable transmission device 3 entering the communication area and unlocks the electric lock 5 has been described. The operation in the case where the householder having the device 3 unlocks the electric lock 5 by himself / herself will be described based on the flowchart of FIG.

  In a state where a family member with the portable transmission device 3 does not exist within the detection area of the approach detection device 4, the CPU 20 of the reader device 2 does not transmit radio waves from the LF band transmission IC 21, and the reader device 2 is in a standby state. (S20).

  In this standby state, if a householder with the portable transmission device 3 presses the operation SW 34 of the portable transmission device 3 before entering the detection area of the human detection unit 41, the CPU 30 inputs from the operation SW 34. Based on the operation signal, the self-identification information and the unlock signal are encrypted by the encryption processing unit 33 and then transmitted from the low power transmission module 32 (S21). At this time, in the reader device 2, the low-power module 22 receives the encrypted identification information and unlock signal, and the CPU 20 causes the data transmission / reception unit 23 to transmit the received identification information and unlock signal to the electric lock control device 1. (S22). In the electric lock control device 1, when the data transmission / reception unit 11 receives the identification information and the unlock signal transmitted from the reader device 2, the CPU 10 decodes the received identification information and the unlock signal and is registered in the memory in advance. ID authentication is performed by collating with the identification information (S23).

  If the identification information transmitted from the reader device 2 matches the identification information registered in the memory as a result of the ID authentication (authentication OK), the CPU 10 causes the electric lock drive unit 12 to release the electric lock 5 in response to the unlock signal. While unlocking (S24), the built-in timer 13 starts a time limit operation for a predetermined unlock time, and the unlocked state is maintained until the time limit for the unlock time ends (S25). When the timer 13 expires, the CPU 10 causes the electric lock drive unit 12 to lock the electric lock 5 (S26), and then starts a time limit operation for a predetermined holding time (for example, 1 to 5 minutes) by the timer 13, The locked state is maintained until the holding time expires (S27), and when the holding time expires, the process returns to the standby state of S1 (S28).

  On the other hand, if the identification information transmitted from the reader device 2 does not match the identification information registered in the memory as a result of the ID authentication (authentication NG), the CPU 10 transmits an error signal from the data transmitting / receiving unit 11 to the reader device 2. . At this time, in the reader device 2, the data transmission / reception unit 23 receives the error signal transmitted from the electric lock control device 1, and the CPU 20 sounds the buzzer unit 24 in response to the error signal (S <b> 29). The person in front can be informed that the authentication has failed, and after returning to the buzzer, the process returns to the standby state of S1 (S30).

  As described above, in the electric lock control device 1, when the ID authentication is successful, the electric lock control device 1 unlocks the electric lock 5 for a predetermined unlocking time and then locks the electric lock 5. Until the holding time elapses, after the householder with the portable transmission device 3 enters the house and the electric lock 5 is locked. Even if the householder stays within the communication area of the reader apparatus 2, the electric lock control apparatus 1 maintains the locked state during this period, so that the reader apparatus 2 is identified from the portable transmitter 3 held by the householder. Since the information is read, it is possible to prevent the electric lock from being unlocked, and it is possible to prevent the suspicious person who has followed the householder from entering the house.

  Moreover, since the communication distance of the low-power transmission module 32 is longer than the communication distance of the non-contact communication unit composed of the LF band transmission IC 21 and the LF band reception IC 31, it is further distant by operating the operation SW 34 of the portable transmitter 3. Thus, the electric lock 5 can be unlocked. Therefore, the electric lock 5 can be unlocked before the housekeeper with the portable transmitter 3 reaches the entrance door, and the housekeeper unlocks the electric lock 5 in front of the entrance door. It is possible to shorten the waiting time, and to prevent being involved in a crime while waiting in front of the entrance door. In addition, when a householder unlocks the electric lock 5 by himself using the portable transmission device 3, it is expected that a suspicious person is going to enter the house early because the suspicious person is following, so the reader device Compared to the case where 2 reads the identification information from the portable transmitter 3 and unlocks it, the holding time for maintaining the locked state of the electric lock 5 after locking is set longer, so that the suspicious person can be more securely invaded. Can be prevented.

  It should be noted that a wide variety of different embodiments can be configured without departing from the spirit and scope of the present invention, and the present invention is not limited to a specific embodiment.

It is a system configuration figure of the electric lock system of this embodiment. It is a flowchart explaining operation | movement same as the above. It is a flowchart explaining other operation | movement same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric lock control apparatus 2 Reader apparatus 3 Portable transmission apparatus 4 Approach detection apparatus 5 Electric lock 12 Electric lock drive part

Claims (1)

An interrogator having a non-contact communication unit that acquires identification information from the responder by performing non-contact communication between the responder in which individual identification information is registered in advance and the responder in the communication area; An electric lock driving unit that locks or unlocks the electric lock provided on the door, and when the identification information acquired by the interrogator matches the identification information registered in advance, the electric lock driving unit puts the electric lock into an unlocked state. And an electric lock control device that holds the locked state until a predetermined first holding time elapses from the time of locking, and the unlocking device generates an unlocking signal according to the operation. An operation unit and a signal transmission unit having a longer communication distance than the non-contact communication unit are provided, and the identification information and the unlock signal are transmitted from the signal transmission unit according to the operation of the unlock operation unit, and The interrogator receives the information transmitted from the signal transmitter of the responder. A signal receiving unit for receiving information and an unlock signal is provided. In the electric lock control device, when the signal receiving unit of the interrogator receives the identification information and the unlock signal, the received identification signal is registered in advance. In accordance with the unlocking signal, the electric lock driving unit sets the electric lock to the unlocked state and then locks, and the predetermined second holding time set longer than the first holding time from the time of locking. An electric lock system characterized by maintaining a locked state until it elapses .

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