JP2006350861A - Security system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a security system capable of distinguishing the moving direction of a family member carrying a responder and performing control according to the moving direction. <P>SOLUTION: The security system comprises a responder TG with specific individual identification information set therein, and an interrogator RW for acquiring the identification information through wireless communication with the responder TG. The interrogator RW comprises two LF transmitters 8a, 8b, and the respective LF transmitters 8a, 8b are arranged so that their respective communication areas may not overlap each other along a path outside a door, and transmit interrogation signals including their own ID number respectively. In a controller 5 of the responder TG, only when a plurality of interrogation signals respectively with a different ID number are received by an LF receiver 2 within a predetermined time frame, information indicative of all the received ID numbers and the ID number receiving order is transmitted from an RF transmitter 1 together with its own identification information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a security system.

  As this type of security system, an electric lock system that controls unlocking or locking of an electric lock provided on a front door in a general house or the like has been conventionally provided (see, for example, Patent Document 1). In this electric lock system, when individual identification information is set and an interrogation signal transmitted from the outside is received as a radio signal, a first radio communication unit that returns a response signal including its own identification information as a radio signal, A communication control unit that controls communication of the wireless communication unit 1 and a responder that includes a battery that supplies power to the internal circuit; and a responder that is installed in the vicinity of the door and transmits an interrogation signal as a radio signal to the outside. When the identification information included in the response signal received by the interrogator matches the identification information registered in advance, the interrogator having the second wireless communication unit that receives the response signal returned from An electric lock control device that locks or unlocks the lock.

In this electric lock system, when a housekeeper who has gone out approaches the entrance door with a responder and enters the communication area of the interrogator, the response from the responder is triggered by the reception of the interrogator signal transmitted from the interrogator. A response signal including the identification information is returned, and the interrogator receives the response signal. In the electric lock control device, the identification information received by the interrogator is compared with the identification information registered in advance, and if the identification information received by the interrogator matches the registered identification information, the electric lock is unlocked. Since it is locked after being locked, the housekeeper can enter the house while the electric lock is unlocked without taking out the key and performing the unlocking operation.
Japanese Patent Laid-Open No. 11-161747

  In the electric lock system described above, when a householder with a transponder enters the communication area of the interrogator, the interrogator obtains identification information from the transponder by performing wireless communication with the transponder possessed by the householder. If the acquired identification information matches the identification information registered in advance, the electric lock is unlocked, but is the housekeeper who is going through the communication area going home or going out? Therefore, it is impossible to switch between locking and unlocking the electric lock according to the direction of movement of the householder, and the electrician is unlocked because the householder who wants to go out passes through the communication area of the interrogator. There was also a possibility of end.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to determine a moving direction of a householder having a responder and to perform control according to the moving direction. Is to provide.

  In order to achieve the above object, according to the first aspect of the present invention, when individual identification information is set and a query signal transmitted from the outside as a radio signal is received, a response signal including its own identification information is returned as a radio signal. A wireless communication unit, a communication control unit for controlling communication of the wireless communication unit, and a transponder having a battery for supplying power to the internal circuit, and are arranged away from each other along the advancing direction of the passage outside the door Included in the interrogator provided with a plurality of radio transmitters each transmitting an interrogation signal as a radio signal to the outside, and a radio receiver unit receiving a response signal returned from the responder, and the response signal received by the interrogator If the identification information matches the pre-registered identification information, at least one of the processes of locking or unlocking the electric lock provided on the door or switching the indoor monitoring mode to warning setting or warning cancellation is performed. A plurality of wireless transmission units, each of which is assigned an individual ID number, and each wireless transmission unit transmits an inquiry signal including its own ID number by a wireless signal, and a communication control unit of a responder Only when the wireless communication unit has received at least two interrogation signals having different ID numbers within a predetermined time, all ID numbers received within a predetermined time and information indicating the reception order of the ID numbers are self-identification information. And transmitting from a wireless communication unit.

  According to the present invention, when a plurality of interrogation signals having different ID numbers are received within a predetermined time, the communication control unit of the responder, together with its own identification information, all ID numbers and IDs received within the predetermined time. Since the information indicating the reception order of the numbers is transmitted from the wireless communication unit, the moving direction of the person having the responder can be determined from the reception order of the ID numbers assigned to the wireless transmission unit, and the security device moves. Control according to the direction can be performed. Moreover, if the communication control unit of the responder does not receive a plurality of response signals having different ID numbers within a predetermined time period, the response signal is not transmitted as a wireless signal from the wireless communication unit. The number of transmissions can be reduced.

  In the invention of claim 2, the communication control unit of the responder is an ID number registered in advance in the wireless communication unit, and only when at least two question signals having different ID numbers are received within a predetermined time, All the ID numbers received within the predetermined time and information indicating the reception order of the ID numbers are transmitted from the wireless communication unit together with its own identification information.

  According to this invention, even if the communication control unit of the responder receives a plurality of question signals having different ID numbers within a predetermined time, if the received ID number is not a pre-registered ID number, the wireless communication unit Since the response signal is not transmitted as a wireless signal, it is possible to prevent a response signal from being transmitted in response to an interrogator transmitted from an interrogator other than the corresponding interrogator.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, each of the wireless transmission units transmits a wireless signal with a transmission period shifted from each other.

  According to the present invention, since the wireless transmission units transmit the wireless signals with the transmission periods shifted from each other, even if the communication areas of the multiple wireless transmission units partially overlap, the multiple wireless transmission units Interference of radio signals transmitted from can be avoided.

  According to the invention of claim 1, when the communication control unit of the responder receives a plurality of question signals having different ID numbers within a predetermined time, all IDs received within the predetermined time together with its own identification information Since the wireless communication unit transmits information indicating the number and the reception order of the ID numbers, the moving direction of the person having the responder can be determined from the reception order of the ID numbers assigned to the wireless transmission unit. There is an effect that the device can perform control according to the moving direction. Moreover, if the communication control unit of the responder does not receive a plurality of response signals having different ID numbers within a predetermined time period, the response signal is not transmitted as a wireless signal from the wireless communication unit. There is an effect that the number of transmissions can be reduced, thus reducing the power consumption and extending the battery life.

  According to the invention of claim 2, even if the communication control unit of the responder receives a plurality of question signals having different ID numbers within a predetermined time, the received ID number is not a pre-registered ID number, Since the response signal is not transmitted as a wireless signal from the wireless communication unit, it is possible to prevent the response signal from being transmitted in response to the inquiry signal transmitted from an interrogator other than the corresponding interrogator.

  According to the invention of claim 3, since each wireless transmission unit transmits a wireless signal with a transmission period shifted from each other, even if communication areas of a plurality of wireless transmission units partially overlap, There is an effect that interference of radio signals transmitted from the radio transmission unit can be avoided.

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are block diagrams of the security system of the present embodiment, and this system includes a responder TG, an interrogator RW, a receiving device U, and an electric lock control device LTU as main components.

  A responder TG (wireless tag) includes an RF transmitter 1 that modulates a transmission signal and transmits the electromagnetic wave from the antenna 1a using a radiated electromagnetic wave, an LF receiver 2 that includes a loop antenna 2a and receives and demodulates a dielectric electromagnetic wave, An encryption processing unit 3 that performs encryption processing or decryption processing on a signal when the signal is modulated and demodulated in the RF transmission unit 1 and the LF reception unit 2, and an operation switch (hereinafter referred to as an operation SW) 4 for a carrier to perform a transmission operation; The control unit 5 that controls the units 1 to 4 and the battery 6 that supplies power to the internal circuit are provided. Individual identification information is preset in the responder TG and stored in a memory (not shown). Here, the RF transmission unit 1 and the LF reception unit 2 constitute a wireless communication unit, and the control unit 5 serving as a communication control unit controls the communication of the wireless communication unit and performs wireless communication with the interrogator RW. A response signal including its own identification information is transmitted as a radio signal.

  As shown in FIG. 3, the interrogator RW (wireless tag reader device) is installed in the vicinity of the entrance door D in each dwelling unit of a detached house or an apartment house, and transmits a question signal to the responder TG. An RF receiver 7 (wireless receiver) that receives and demodulates the electromagnetic wave radiated from the RF transmitter 1 by the antenna 7a, and a plurality of signals that are respectively transmitted from the loop antennas 9a and 9b by modulating the transmission signal into an induced electromagnetic wave. The signal is subjected to encryption processing or descrambling processing at the time of modulation / demodulation of signals in the LF transmitters 8a and 8b (wireless transmitters) of the base (two in this embodiment) and the RF receiver 7 and LF transmitters 8a and 8b The encryption processing unit 10, the display unit 11 for displaying the operating state, the buzzer 12 for notifying a predetermined abnormal state with a ringing sound, and an external interface (hereinafter referred to as an external I / F) for connecting the receiving device U to be communicable. ) Includes a 13, and a control unit 14 for controlling the entire. Note that wireless communication is performed between the RF reception unit 7 of the interrogator RW and the RF transmission unit 1 of the responder TG by a communication method such as specific low power communication.

  Here, individual ID numbers (Tx_LF1, Tx_LF2) are assigned to the two LF transmitters 8a and 8b, and a question signal (transmission signal) including the ID number is transmitted as a radio signal. The communication areas A1 and A2 are arranged so as not to overlap each other along the traveling direction of the passage W located outside the road. In the example of FIG. 3, the communication area A1 of the LF transmitter 8a is set closer to the entrance door D than the communication area A2 of the LF transmitter 8b. Although the communication areas A1 and A2 can be set by controlling the transmission output of the LF transmitters 8a and 8b, the loop antennas 9a and 9b provided in the LF transmitters 8a and 8b are adjusted so that the directions are separated from each other. For example, it is relatively easy to adjust so that the communication areas A1 and A2 do not overlap each other. Thus, by adjusting the direction of the loop antennas 9a and 9b so that the communication areas A1 and A2 do not overlap each other, a plurality of LF transmitters 8a and 8b can be incorporated in the same housing. The number of interrogators RW can be reduced to one. In this embodiment, the case where two LF transmitters 8a and 8b, which are wireless transmitters, are described for the sake of simplicity, but the number of wireless transmitters is limited to two. There is no need to decide the number of units according to the intended use and usage environment.

  The receiving device U includes an interrogator interface (hereinafter referred to as an interrogator I / F) 15 that is communicably connected to the external I / F 12 of the interrogator RW, a display unit 16 that displays an operating state, and a predetermined abnormal state. Alarm sound generating unit 17 for notifying by alarm sound, operation unit 18 for an operator to perform a desired operation, crime prevention for detecting opening / closing states of windows and doors, destruction of window glass, or intrusion into a room The receiving part 19 which receives the notification signal transmitted by radio signal from the disaster prevention sensor Sb such as the sensor Sa or the fire alarm or the gas leak alarm via the antenna 19a and the electric lock control device LTU are communicably connected. The electric lock interface (hereinafter referred to as an electric lock I / F) 20 and the entire control are performed, and the wired communication between the interrogator I / F 15 and the external I / F 12 is concealed. And a control unit 21 for performing an encryption process or decryption process to the signal.

  The electric lock control device LTU locks or unlocks an external interface (hereinafter referred to as an external I / F) 22 that is communicably connected to the electric lock I / F 20 of the receiving device U and an electric lock LK provided on the entrance door D. An electric lock drive unit 23 for locking, an opening / closing detection unit 24 for detecting opening / closing of the entrance door D, an expansion interface (expansion I / F) 25 for connecting other external devices, and overall control. And a control unit 26 to perform.

  Here, in the receiving device U, the identification information included in the response signal returned from the responder TG in response to the interrogation signal from the interrogator RW is registered in advance in an internal memory (not shown) of the control unit 21. If it matches the identification information, the electric lock control device LTU is controlled to unlock or lock the electric lock LK, and the monitoring mode is switched to a warning setting state or a warning release state for performing indoor warning monitoring. . Here, when the monitoring mode is switched to the alert setting state, the control unit 21 of the receiving device U causes an abnormality in the display unit 16 when the receiving unit 19 receives the notification signal transmitted from the security sensor Sa or the disaster prevention sensor Sb. The occurrence is displayed, and the alarm sound is generated by the alarm sound generation unit 17 to notify the householder in the house of the occurrence of the abnormality. On the other hand, when the monitoring mode is switched to the warning release state, the control unit 21 does not receive the notification signal from the security sensor Sa except when the notification signal from the disaster prevention sensor Sb is received. Then, the notification operation by the display unit 16 and the alarm sound generation unit 17 is not performed. Here, a security device is constituted by the receiving device U and the electric lock control device LTU.

  Next, as shown in FIG. 3, the operation of the security system when the person M having the responder TG moves through the passage W toward the entrance door D to enter the house is a flowchart shown in FIGS. An explanation will be given based on In the flowchart of FIG. 4, the operations of the interrogator RW, the receiving device U, and the electric lock control device LTU on the equipment side are described, and in the flowchart of FIG. 5, the operation of the responder TG is described.

  When the power is turned on and the interrogator RW enters an operating state, the interrogator RW enters a standby state where it waits for a response signal from the responder TG to be returned. In this standby state, the controller 14 of the interrogator RW periodically transmits an interrogation signal including its own ID number from the LF transmitters 8a and 8b to the reception areas A1 and A2, and the RF receiver 7 receives the responder TG. Waits for a response from (step S1).

  When the receiving unit 19 of the interrogator RW receives the reply signal from the responder TG in the standby state (step S2), the control unit 14 of the interrogator RW includes the identification information of the responder TG included in the reply signal and the received LF. The ID information of the transmission units 8a and 8b is transferred from the external I / F 13 to the reception device U (step S3), and the control unit 21 of the reception device U acquires the identification information acquired by the interrogator RW and the identification information registered in advance. And ID authentication is performed (step S4). Here, when transmitting the received ID information of the LF transmitters 8a and 8b, the responder TG transmits the ID information in the order of reception.

  If the identification information of the responder TG matches the pre-registered identification information as a result of the ID authentication (that is, if the person M having the responder TG is a management target person), the control of the receiving device U The unit 21 determines the reception order of the ID information of the LF transmitters 8a and 8b transmitted together with the identification information (step S5), and the ID information Tx_LF2 of the LF transmitter 8b is added after the ID information Tx_LF1 of the LF transmitter 8a. If it is transmitted, it is determined that the person M having the responder TG has moved from the communication area A2 to the communication area A1. That is, the control unit 21 of the receiving device U can determine that the person M having the responder TG is moving in a direction approaching the entrance door D, and the person M having the responder TG enters the room through the entrance door D. In order to permit this, the monitoring mode is switched from the previous warning setting state to the warning release state (step S6), and an open signal is sent from the electric lock I / F 20 to the electric lock control device LTU (step S7). At this time, in the electric lock control device LTU, the control unit 26 unlocks the electric lock LK by the electric lock driving unit 23 in accordance with the opening signal input via the external I / F 22 (step S8). Thereafter, the control unit 26 determines whether or not the entrance door D is once closed after being opened once based on the detection result of the open / close detection unit 24 (step S9), and when the entrance door D is closed again. The electric lock drive unit 23 locks the electric lock LK and transmits a standby signal from the external I / F 22 to the receiving device U. The standby signal is also transferred to the interrogator RW via the receiving device U. The RW and the receiving device U return to the standby state (step S1). On the other hand, if the closed state of the entrance door D is not detected by the open / close detection unit 24 even after a predetermined time has elapsed since the electric lock LK is unlocked in step S9, the control unit 26 opens the entrance door D. The notification signal is transmitted from the external I / F 22 to the receiving device U, and the receiving device U outputs an alarm sound from the alarm sound generating unit 17 or the display unit 16 generates an abnormality. By displaying it, the user is informed that the front door D remains open.

  In step S5, if the ID information Tx_LF1 of the LF transmitting unit 8a is transmitted after the ID information Tx_LF2 of the LF transmitting unit 8b, the control unit 21 of the receiving device U causes the person M having the responder TG to communicate with the communication area A1. It is judged that it moved to communication area A2. That is, the control unit 21 of the receiving device U can determine that the person M having the responder TG is moving away from the entrance door D, and the person M having the responder TG has exited through the entrance door D. The monitoring mode is switched from the previous warning release state to the warning setting state (step S10), and a close signal is sent from the electric lock I / F 20 to the electric lock control device LTU (step S11). At this time, in the electric lock control device LTU, the control unit 26 locks the electric lock LK by the electric lock driving unit 23 in accordance with the closing signal input via the external I / F 22 (step S12). Thereafter, based on the detection result of the open / close detection unit 24, the control unit 26 confirms whether or not the entrance door D is closed, that is, whether the electric lock LK is locked with the entrance door D open. (Step S13), if the entrance door D is closed, the external I / F 22 transmits a standby signal to the receiving device U, and the standby signal is also transferred to the interrogator RW via the receiving device U. The interrogator RW and the receiving device U return to the standby state (step S1). On the other hand, if the open / close detection unit 24 cannot detect the closed state of the entrance door D in step S13, the control unit 26 determines that the electric lock LK is locked while the entrance door D is open, and the external I / F 22 A notification signal is transmitted to the receiving device U, and the receiving device U outputs an alarm sound from the alarm sound generating unit 17 or displays an abnormality occurrence on the display unit 16 so that the entrance door D remains open. Let them know that

  In step S5, if the ID information of the LF transmitter transmitted from the responder TG does not match the ID information Tx_LF1 and Tx_LF2 of the LF transmitters 8a and 8b, the ID is transmitted in response to another interrogator RW. It is determined that the signal is a signal and the process returns to the standby state (step S1).

  Next, the operation of the responder TG corresponding to the operation on the facility side will be described with reference to FIG. In order that the responder TG does not waste the power of the battery 6, the control unit 5 switches the operation mode to the standby mode in a state where the radio wave from the interrogator RW is not received. In this standby mode, the interrogator It waits in a low consumption mode in which power is supplied only to the circuit elements necessary for receiving radio waves from the RW (step S21). During standby in the low power consumption mode, only the LF receiver 2 is in the standby state in the low power consumption mode among the elements of the responder TG, and other circuit elements are in the sleep mode in which the power consumption is lower than in the low power consumption mode. It has been switched to. In particular, the RF transmitter 1 that consumes the largest amount of power is in a state where the power supply is completely cut off.

  In this standby state, when the LF receiver 2 of the responder TG receives the induced electromagnetic wave from the interrogator RW (step S22), the ID information of the LF transmitter included in the induced electromagnetic wave (question signal) is read and read. Whether the ID information is the ID information Tx_LF1 of the LF transmission unit 8a or the ID information Tx_LF2 of the LF transmission unit 8b is identified (step S23). At this time, in the responder TG, as long as the signal format and the ID information code match, there is a possibility that the induced electromagnetic wave from the other interrogator RW that does not correspond may be received and demodulated. If the information is other than the ID information Tx_LF1 and Tx_LF2 of the LF transmitters 8a and 8b registered in advance, the process is stopped and the process returns to the standby state in step S21.

  As a result of identifying the ID information in step S23, when the control unit 5 recognizes the ID information Tx_LF2 of the LF transmission unit 8b, a timed operation for a predetermined time t is started by a timer (not shown) until the timed operation of the timer ends. (That is, until a predetermined time t elapses), the LF receiver 2 receives the induced electromagnetic wave again, and the ID information included in the induced electromagnetic wave is recognized as the ID information Tx_LF1 of the LF transmitter 8a. If possible (Y in step S24), power supply to the RF transmitter 1 is started, and the RF transmitter 1 and the LF receiver 2 wake up to a normal transmission / reception mode in which they can communicate with each other. After the response signal including the received ID information Tx_LF2 and Tx_LF1 of the LF transmitters 8b and 8a is transmitted from the RF transmitter 1 (step S25), the process returns to the standby state of step S21. When the control unit 5 transmits the ID information Tx_LF2 and Tx_LF1 received during the predetermined time as a response signal, the ID information Tx_LF2 and Tx_LF1 are transmitted in the order received, and the interrogator RW responds with the responder TG. Based on the order in which the ID information Tx_LF2 and Tx_LF1 are received by the response signal from, it is possible to determine which ID information the responder TG has received first. In the responder TG, when transmitting ID numbers as response signals, the ID numbers are transmitted in the order received from the LF transmitters 8b and 8a, and the ID numbers are received in the order of transmitting the ID numbers. Although order information is included, information indicating the order in which each ID number is received may be transmitted separately.

  When the control unit 5 recognizes the ID information Tx_LF1 of the LF transmission unit 8a as a result of identifying the ID information in step S23, a time limit operation for a predetermined time t is started by a timer (not shown), and the time limit operation of the timer is ended. In the meantime, if the LF receiver 2 receives the induced electromagnetic wave again and the ID information included in the induced electromagnetic wave can be recognized as the ID information Tx_LF2 of the LF transmitter 8b (Y in step S26), the RF transmitter 1 starts power supply to 1 and wakes up to a normal transmission / reception mode, and transmits a response signal including its own identification information and received ID information Tx_LF1 and Tx_LF2 of the LF transmission units 8a and 8b from the RF transmission unit 1 (Step S27), the process returns to the standby state of Step S21.

  When the person M carrying the responder TG operates the operation SW4 in the standby state in step S21, the control unit 5 of the responder TG starts supplying power to the RF transmission unit 1 in accordance with the operation input of the operation SW4. Then, after waking up to the normal transmission / reception mode and transmitting its own identification information from the RF transmission unit 1, it returns to the standby state of step S21, and the interrogator RW is sent to the reception device U and the electric lock control device LTU. A predetermined control operation can be performed based on the received signal.

  As described above, in the present embodiment, the LF transmitters 8a and 8b are arranged so that the communication areas A1 and A2 do not overlap each other, and in the controller 26 of the responder TG, the LF receiver 2 is connected to the interrogator RW. Even if a radio signal from the responder TG is received, if a plurality of interrogation signals having different ID numbers are not received within a predetermined time t, the RF transmitter 1 does not transmit a response signal. The number of transmissions can be reduced, thus reducing power consumption and extending the life of the battery 6. In this embodiment, since the number of LF transmitters 8a and 8b is two, the responder TG transmits a response signal only when both the ID information of the LF transmitters 8a and 8b can be received within a predetermined time. However, when the number of LF transmitters is 3 or more, it is sufficient to transmit a response signal only when ID information of at least two registered in advance can be received. It is possible to prevent a transmission signal from being output in response to an interrogator signal transmitted from any other interrogator, and to determine the moving direction of the person having the responder TG by returning a plurality of ID numbers. When the communication areas A1 and A2 of the LF transmitters 8a and 8b are not overlapped at all, a question signal can be transmitted simultaneously from each of the LF transmitters 8a and 8b as described above, but the communication areas A1 and A2 are In the case of partial overlap, a plurality of LF transmitters may transmit the interrogation signal while shifting the transmission period from each other, and interference of radio signals transmitted from each LF transmitter can be avoided. .

  Further, the relative positional relationship between the entrance door D and the LF transmitters 8a and 8b is registered in advance in the control unit 26 of the receiving device U in a memory (not shown), and the control unit 5 of the responder TG has a predetermined time. When a plurality of interrogation signals having different ID numbers are received, all ID numbers received within a predetermined time are transmitted from the RF transmitter 1 in the order in which each ID number is received, along with its own identification information. Therefore, in the control unit 26 of the receiving device U, whether the person M having the responder TG is moving in the direction approaching the entrance door D or in the direction away from the entrance door D by the process in step S5 in FIG. It can be determined whether it is moving or not, and control according to the moving direction can be performed as described in the flowchart of FIG.

  In the present embodiment, communication is performed between the interrogator RW and the receiving device U. When the interrogator RW receives a response signal from the responder TG, the identification information included in the received response signal is transmitted to the receiving device U. As shown in FIG. 6, the electric lock control device LTU is provided with an interrogator interface (hereinafter referred to as an interrogator I / F) 27 for connecting the external I / F 12 of the interrogator RW so that communication is possible. Communication may be performed between the electric lock control device LTU and the interrogator RW. In this case, in the electric lock control device LTU, the identification information included in the response signal returned from the responder TG in response to the interrogation signal from the interrogator RW is stored in advance in an internal memory (not shown) of the control unit 26. If it matches the registered identification information, the electric lock drive unit 23 unlocks or locks the electric lock LK, and the external I / F 22 controls the electric lock I / F 20 of the receiving device U by wire. A signal is transmitted, and the monitoring unit 21 of the receiving device U switches the monitoring mode to either the alert setting state or the alert release state.

  In addition, when the above-described receiving device U is installed and used in each dwelling unit of the apartment house, the function of the receiving device U may be incorporated in the housing information panel Y installed in each dwelling unit as shown in FIG. . Note that X in FIG. 7 is a monitoring panel X installed in a manager's room or the like, and the housing information panel Y of each dwelling unit can communicate with the monitoring panel X via a signal line L. That is, the device that receives the signal from the interrogator RW may be any of the receiving device U, the electric lock control device LTU, or the house information panel Y that constitutes the security device, and the security device has the function of the interrogator RW. Also good.

  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 the block diagram which showed the principal part of the security system of this embodiment. It is the block diagram which showed the other principal part same as the above. It is arrangement | positioning explanatory drawing explaining the use condition same as the above. It is a flowchart explaining operation | movement by the side of the installation same as the above. It is a flowchart explaining operation | movement of a responder same as the above. It is the block diagram which showed the other structure same as the above. It is the block diagram which showed another structure same as the above.

Explanation of symbols

RW Interrogator TG Responder U Receiver LTU Electric lock controller LK Electric lock D Entrance door W Passage 1 RF transmitter 2 LF receiver 5 Controller 8a, 8b LF transmitter

Claims (3)

Communication control that controls the communication of the wireless communication unit and the wireless communication unit that returns the response signal including its own identification information as a wireless signal when individual identification information is set and the inquiry signal transmitted from the outside is transmitted as a wireless signal And a responder comprising a battery for supplying power to the internal circuit,
A plurality of wireless transmission units that are arranged apart from each other along the advancing direction of the passage on the outside of the door, and each transmit a question signal as a wireless signal to the outside, and a wireless reception unit that receives the response signal returned from the responder An interrogator comprising:
When the identification information included in the response signal received by the interrogator matches the identification information registered in advance, the lock or unlocking of the electric lock provided on the door, or the process of switching the indoor monitoring mode to warning setting or warning cancellation A security device that performs at least one of the processes,
Individual ID numbers are assigned to the plurality of radio transmission units, and each radio transmission unit transmits an interrogation signal including its own ID number as a radio signal, and the communication control unit of the responder has a predetermined radio communication unit. Only when at least two interrogation signals with different ID numbers are received within the time, all ID numbers received within the predetermined time and information indicating the reception order of the ID numbers are transmitted from the wireless communication unit together with their own identification information. A security system characterized by The communication control unit of the responder receives the ID number registered in advance in the predetermined time only when the wireless communication unit receives at least two question signals having different ID numbers within a predetermined time. 2. The security system according to claim 1, wherein all the ID numbers and information indicating the reception order of the ID numbers are transmitted from the wireless communication unit together with the identification information of the ID numbers. 3. The security system according to claim 1, wherein each of the wireless transmission units transmits a wireless signal with a transmission period shifted from each other.

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