JP4517952B2 - Security system - Google Patents

Description

  The present invention relates to a security system that monitors or defends a target area such as a house or an office.

  In recent years, the number of crimes such as aiming for burial nests and robberies has been increasing. As countermeasures, crimes can be detected by detecting intruders in a dwelling unit, or by remotely controlling an electric lock installed at the entrance of a dwelling unit. Security systems that are locked and unlocked are rapidly spreading.

  As one of this type of security system, a wireless communication is performed between a responder (ID tag) carried by a resident and an interrogator (reader device) installed at an outside entrance, and a response received by the interrogator. When the ID (identification code) of the container matches an ID registered in advance, there is one that unlocks the electric lock provided on the entrance door (see, for example, Patent Document 1).

  In such a conventional example, the responder and the interrogator are each provided with an antenna composed of a coil and a capacitor, and the activation signal transmitted from the interrogator antenna by low-frequency (for example, hundreds of hertz) electromagnetic waves is transmitted to the responder. When received by the antenna, the responder creates an operating power supply for the internal circuit from the induced electromotive force generated in the antenna, receives the start signal and transmits the identification code, and the responder does not require a power source such as a battery. It has become. However, when the operating power source of the responder is created by the electromagnetic wave transmitted from the interrogator as described above, the communicable distance is at most several centimeters even in the radio communication system using the electromagnetic wave with relatively low power consumption. Since there are only a few tens of centimeters, it was necessary to hold the transponder close to the interrogator for communication.

On the other hand, a battery is built in the transponder to create an operating power supply, extend the reach of electromagnetic waves that transmit start signals, and use radio signals that use radio waves as a medium (for example, specific low-power radio systems and weak radio systems) For example, a responder that transmits an identification code using a radio signal) has been proposed. With such a responder, it is possible to save the trouble of holding it close to the interrogator.
JP-A-11-161747

  However, if the reach distance of the electromagnetic wave that transmits the activation signal is extended, the reach range (communication range) is also expanded at the same time, so if a person who goes out unintentionally enters the reach range of the electromagnetic wave, There is a risk that the lock may be unlocked by mistake. In such a case, the responder transmits an identification code by radio signal to the interrogator, so that useless power is consumed and the battery life of the responder is shortened. In order to prevent such problems, it is necessary to narrow the reach range while extending the reach distance of the electromagnetic wave, but in the wireless communication method using the electromagnetic wave, it is very important to achieve both extension of the reach range and narrowing of the reach range. Have difficulty.

  The present invention has been made in view of the above circumstances, and its purpose is to substantially increase the reach of the start signal transmitted from the interrogator and to narrow the communication range so that the waste in the responder can be used. An object of the present invention is to provide a security system that can suppress excessive power consumption.

In order to achieve the above object, the invention of claim 1 stores a unique identification code and a responder having a function of transmitting the identification code by a radio signal; An interrogator that makes an inquiry and receives an identification code returned from the responder, a control device that controls a security device for monitoring or protecting the target area, and detecting the vicinity of the entrance to the target area outside the target area A human body detection device that detects the presence of a person within the detection range, the interrogator includes a first wireless transmission unit that transmits an activation signal in the first wireless communication method, and a first wireless communication method The first wireless receiving means for receiving the identification code from the responder in a second wireless communication system different from the first wireless signal transmission means, the first signal transmitting means for signal transmission between the control device and the human body detecting device Interrogator control for causing the first wireless transmission means to transmit an activation signal and transmitting the identification code received by the first wireless reception means from the first signal transmission means to the control device when the presence of a person in the enclosure is detected And the first wireless transmission means includes a transmission antenna configured of a coil and a capacitor for transmitting a signal by electromagnetic waves, and an LF transmission unit for transmitting the activation signal from the transmission antenna by electromagnetic waves. The first radio receiving means includes a receiving antenna that receives a radio signal using radio waves as a medium, and an RF receiving unit that demodulates the radio signal received by the receiving antenna; A second wireless receiving means for receiving an activation signal in the first wireless communication system, a second wireless transmitting means for transmitting an identification code in the second wireless communication system, and a second wireless receiving means. Until the activation signal is received by the means, the second wireless transmission means is set in a stopped state without power consumption. When the second wireless reception means receives the activation signal, the second wireless transmission means is operated and an identification code is received by the wireless signal. The second wireless receiving means is configured to include a coil and a capacitor and receive the activation signal transmitted by electromagnetic waves. An antenna for receiving and an LF receiver for demodulating a signal received by the receiving antenna, and the second radio transmitting means includes a transmitting antenna for transmitting a radio signal using radio waves as a medium, and the transmitting antenna. And an RF transmitter for transmitting a radio signal from the second controller , and the control device registers in advance a second signal transmission means for transmitting signals to and from the interrogator and an identification code received by the second signal transmission means. And a control means for performing control related to the security device when matching with the recorded identification code, the detection range of the human body detection device is narrower than the communicable range of the first wireless transmission means, and the communicable range The detection range is included in the inside.

  According to a second aspect of the present invention, in the first aspect of the present invention, the interrogator control means causes the unique interrogator ID assigned in advance to be transmitted together with the activation signal from the first wireless transmission means as a radio signal, and responder control means Operates the second wireless transmission means and transmits the identification code by the wireless signal only when the interrogator ID received together with the activation signal by the second wireless receiving means matches the pre-registered interrogator ID. It is characterized by that.

  According to a third aspect of the present invention, in the first or second aspect of the invention, a plurality of human body detection devices are arranged along the direction of travel to the entrance / exit outside the target area, and the control device has each human body detection device within the detection range. Human body detection signal receiving means for receiving a human body detection signal output when the presence of a person is detected is provided, and the control means of the control device receives human body detection signals from a plurality of human body detection devices by the human body detection signal receiving means. In this case, the movement direction of the person with respect to the entrance / exit is determined based on the order in which the human body detection signals are received, and the control content related to the security device is switched according to the movement direction.

  According to the first aspect of the present invention, the detection range of the human body detection device is narrower than the communicable range of the first wireless transmission means, and the detection range is included in the communicable range, and the interrogator control means includes the human body detection device. Since the activation signal is transmitted by the first wireless transmission means when the presence of a person is detected within the detection range, the substantial communicable range of the first wireless transmission means is narrowed to the detection range of the human body detection device As a result, it is possible to substantially reduce both the extension of the reach of the activation signal transmitted from the interrogator and the narrowing of the communicable range, thereby suppressing wasteful power consumption in the responder.

  According to the invention of claim 2, for example, the responder included in one system receives the activation signal from the interrogator included in the other system as in the case where each dwelling unit of the apartment house is the target area. Thus, it is possible to prevent the identification code from being transmitted unnecessarily, and as a result, it is possible to suppress unnecessary power consumption in the responder.

  According to the invention of claim 3, it is possible to determine whether a person is entering the target area or has come out of the target area on the basis of the moving direction with respect to the entrance and exit, and control related to the security device according to each case. The content can be switched to an appropriate one.

(Embodiment 1)
As shown in FIG. 2, the security system of the present embodiment is installed in a dwelling unit, detects a security-related anomaly such as a suspicious person entering the dwelling unit, a gas leak in the dwelling unit, or a fire, and transmits an abnormality detection signal A transmitter (not shown), a human body detection device 1 having a detection range outside the dwelling unit as described later, and a function of storing a unique identification code and transmitting the identification code by radio signal. A portable responder 2, an interrogator 3 that is installed at the outside entrance and inquires of the responder 2 for an identification code by a wireless signal and receives an identification code returned from the responder 2 by a wireless signal, and a transmitter A security control device 4 that receives an abnormality detection signal from the door and notifies the occurrence of an abnormality, an electric lock 6 provided on the entrance door 7, and an electric lock control device 5 that controls locking / unlocking of the electric lock 6. ing.

  The human body detection device 1 detects the presence of a person in the detection range by detecting a heat ray radiated from the human body, and sends a human body detection signal to the interrogator 3 via the signal line Lx when the presence of the person is detected. As shown in FIG. 1, the transmission is embedded in a wall W separating the dwelling unit H and the passage R. The detection range A2 of the human body detection device 1 is set to a relatively narrow range that can detect one person in the passage R in the vicinity of the human body detection device 1.

  As shown in FIG. 3, the transponder 2 includes a coil L1 and a capacitor C1, and receives an activation signal transmitted from the interrogator 3 by electromagnetic waves, and demodulates a signal received by the reception antenna 20. LF reception unit 21, encryption processing unit 22 that encrypts and outputs a unique identification code (ID) set in advance, transmission antenna 23 that transmits a radio signal using radio waves as a medium, and a responder described later An activation signal from the interrogator 3 is input via the RF transmission unit 24 that modulates the signal input from the control unit 25 and transmits it as a radio signal from the transmission antenna 23, and the reception antenna 20 and the LF reception unit 21. Then, the encryption processing unit 22 is operated to capture the encrypted identification code, and the identification code is transmitted by a radio signal via the RF transmission unit 24 and the transmission antenna 23. That the transponder control unit 25 comprises a power supply circuit unit 26 supplies operating power to each unit of the battery as the power source. The responder 2 is in a standby state until the reception signal of the interrogator 3 is received by the receiving antenna 20. In this standby state, the responder control unit 25 operates in the standby mode in which the power consumption is smaller than normal, operates the LF reception unit 21 and stops the encryption processing unit 22 and the RF transmission unit 24. That is, the LF receiver 21 needs to be always operated so that the activation signal from the interrogator 3 can be received anytime, but the RF transmitter 24 only needs to be operated when transmitting the identification code. Except when the activation signal is received and the identification code is transmitted, the RF transmitter 24 is stopped to prevent useless power consumption and extend the battery life.

  The interrogator 3 is composed of a coil L2 and a capacitor C2 and modulates a transmission antenna 30 that transmits a signal by electromagnetic waves and an activation signal input from an interrogator controller 34 described later, and transmits the modulated signals from the transmission antenna 30 by electromagnetic waves. The LF transmitter 31, the reception antenna 32 that receives the radio signal (identification code) transmitted from the responder 2, the RF receiver 33 that demodulates the radio signal received by the reception antenna 32, and the CPU. Interrogator control unit 34 as a component, display unit 35 that performs display using a light emitting element such as an LED, buzzer unit 36 that sounds a buzzer, and human body detection transmitted from human body detection device 1 via signal line Lx An identification code received from the responder 2 via the human body detection device interface (I / F) 37 for passing the signal to the interrogator controller 34 and the signal line Ls Comprising an external interface 38 to transmit, it is embedded disposed in the wall W in a manner adjacent to the human body detecting device 1 as shown in FIG. Here, the reach (communication range) A1 of the electromagnetic wave transmitted from the transmitting antenna 30 is a sufficiently wide range including the detection range A2 of the human body detection device 1 in the vicinity of the interrogator 3 as shown in FIG. Is set.

  The security control device 4 includes a control unit 40 having a CPU as a main component, an interrogator interface (I / F) 41 that passes the identification code transmitted from the interrogator 3 through the signal line Ls to the control unit 40, and A receiving antenna 42 for receiving a radio signal (abnormality detection signal) transmitted from a transmitter installed in the dwelling unit, a receiving unit 43 for demodulating a signal received by the receiving antenna 42, and a light emitting element such as an LED Communicating between the display unit 44 for displaying the occurrence of an abnormality by means of, an alarm sound generating unit 45 for generating an alarm sound, an operation unit 46 having an operation switch, and the electric lock control device 5 via a signal line Lu. 1 and is installed inside the dwelling unit H as shown in FIG.

  The electric lock 6 is well known in the art and is connected to the electric lock control device 5 by a signal line Lv, and an electromagnetic solenoid is driven by a drive signal transmitted from the electric lock control device 5 through the signal line Lv to enter the entrance door 7. Is locked and unlocked, and a lock / unlock detection signal indicating the lock / unlock state and a door close detection signal indicating the door closed state are transmitted to the electric lock control device 5 via the signal line Lv. It has a function.

  The electric lock control device 5 includes a control unit 50 having a CPU as a main component, a communication interface (I / F) 51 for communicating with the crime prevention control device 4 via a signal line Lu, and a control unit 50. And an electric lock drive unit 52 for transmitting a drive signal for locking or unlocking the electric lock 6 through the signal line Lv based on an instruction from the terminal, and is installed inside the dwelling unit H as shown in FIG. Is done. Note that the locking / unlocking detection signal and the closing door detection signal transmitted from the electric lock 6 via the signal line Lv are input to the control unit 50 through the electric lock driving unit 52.

  In the crime prevention control device 4, when the abnormality detection signal transmitted as a radio signal from any transmitter is received via the reception antenna 42 and the reception unit 43 when the control unit 40 is set in the alert mode, the control is performed. The unit 40 controls the display unit 44 to display the occurrence of abnormality due to light, and at the same time, the alarm sound generation unit 45 generates an alarm sound, so that the residents in the dwelling unit H generate an abnormality, the type of abnormality, and the occurrence of the abnormality. Inform the location. However, when the alert mode is canceled, the control unit 40 does not perform any processing on the abnormality detection signal of the transmitter except for an abnormality of gas leakage or fire occurrence. The setting / cancellation of the warning mode for the control unit 40 can be switched by operating the operation switch of the operation unit 46.

  Further, in the electric lock control device 5, when the control unit 50 is set to the automatic lock mode, if the closing door detection signal is input and the lock / unlock detection signal indicates unlocking, the signal line from the electric lock drive unit 52. The electric lock 6 is locked by transmitting the drive signal via Lv, and the drive signal is sent from the electric lock drive unit 52 via the signal line Lv when the resident carrying the responder 2 returns home as will be described later. The electric lock 6 is unlocked by transmitting.

  Next, the overall operation when the resident M of the dwelling unit H returns home will be described. As shown in FIG. 1, when the resident M carrying the responder 2 passes through the corridor R in order to return to his home (dwelling unit H) and enters the detection range A2 of the human body detection device 1, the human body detection device 1 detects it. A resident M who has entered the range A2 is detected, and a human body detection signal is transmitted to the interrogator 3 via the signal line Lx. In the interrogator 3, the interrogator controller 34 is in a standby state and does not output a start signal until a human body detection signal is received via the signal line Lx, but the human body detection device interface 37 receives the human body detection signal. Then, the interrogator controller 34 outputs an activation signal to the LF transmitter 31 and causes the transmission antenna 30 to transmit the activation signal by electromagnetic waves.

  In the responder 2, when the activation signal from the interrogator 3 is input via the receiving antenna 20 and the LF receiving unit 21, the responder control unit 25 in the standby mode is activated and operates the encryption processing unit 22. Then, the encrypted identification code is captured, the identification code is transmitted by a radio signal via the RF transmission unit 24 and the transmission antenna 23, and after the identification code is transmitted by the radio signal, the process returns to the standby state. When the wireless signal (encrypted identification code) returned from the responder 2 is input to the interrogator controller 34 of the interrogator 3 via the receiving antenna 32 and the RF receiver 33, the interrogator control is performed. The unit 34 transmits the encrypted identification code from the external interface 38 to the security control device 4 via the signal line Ls.

  In the crime prevention control device 4, when the identification code is input to the control unit 40 via the interrogator interface 41, after decrypting the encrypted identification code, it is compared with an identification code registered in a memory (not shown), If the received identification code does not match the registered identification code, a signal indicating that (error signal) is transmitted to the interrogator 3 via the interrogator interface 41. When the error signal is input via the external interface 38, the interrogator controller 34 controls the display unit 35 and the buzzer unit 36 to give a warning by light and sound. On the other hand, when the received identification code matches the registered identification code, the control unit 40 of the crime prevention control device 4 cancels the warning mode and transmits the unlocking permission signal to the electric lock control device 5 via the communication interface 47. To do.

  In the electric lock control device 5, when the unlocking permission signal transmitted from the security control device 4 through the communication interface 51 is input to the control unit 50, a drive signal is sent from the electric lock driving unit 52 through the signal line Lv. The electric lock 6 is unlocked by transmitting. If the unlock detection signal is not transmitted from the electric lock 6 after the drive signal is transmitted, the control unit 50 causes the electric lock drive unit 52 to transmit the drive signal again.

  As described above, the detection range A2 of the human body detection apparatus 1 is narrower than the communicable range A1 of the transmission antenna 30 and the LF transmitter 31 (first wireless transmission means) of the interrogator 3, and is detected within the communicable range A1. The range A2 is included, and the interrogator control unit 34 causes the first wireless transmission means to transmit the activation signal when the human body detection device 1 detects the presence of a person within the detection range A2, and thus the first wireless transmission The substantial communicable range of the means is narrowed to the detection range A2 of the human body detecting device 1, and the extension of the reach of the activation signal transmitted from the interrogator 3 and the narrowing of the communicable range are substantially reduced. It is possible to suppress wasteful power consumption in the responder 2 by achieving both. However, since the actual communicable range A1 extends to the outside of the detection range A2, even if the responder 2 is outside the detection range A2, as long as the resident M is in the detection range A2, the activation signal is sent. Can be received.

  By the way, in the situation where many entrance doors 7 are arranged along the corridor R as in an apartment house, the responder 2 of the security system installed in one dwelling unit is installed in another dwelling unit. It is not necessary to communicate with the interrogator 3 of the security system. If the activation signal of the interrogator 3 of another system is received and the identification code is transmitted, the battery life of the responder 2 is shortened. Therefore, a unique ID is assigned to each of the interrogators 3 belonging to a plurality of security systems as described above, and the ID is transmitted together with the activation signal by electromagnetic waves. In the responder 2, the ID of the interrogator 3 registered in advance is transmitted. If the responder control unit 25 operates the RF transmission unit 24 and transmits the identification code by a radio signal only when the received ID and the ID received together with the activation signal match, the interrogator of the other system Therefore, it is possible to prevent the battery life of the responder 2 from being shortened.

  In the present embodiment, the interrogator 3 is connected to the crime prevention control device 4 and the identification code is collated by the crime prevention control device 4, but the interrogator 3 is connected to the electric lock control device 5 as shown in FIG. The electric lock control device 5 may collate the identification code and transmit the collation result to the security control device 4. Further, instead of connecting the human body detection device 1 to the interrogator 3, it is connected to the crime prevention control device 4 or the electric lock control device 5 so that the human body detection signal is transmitted to the interrogator 3 via these control devices 4 and 5. It may be.

  Alternatively, as shown in FIG. 5, the alarm monitoring panel X installed in the manager room of the apartment house, and connected to security devices such as fire detectors and gas leak detectors installed in each dwelling unit of the apartment house The technical idea of the present invention is applied to a housing information board system having a plurality of housing information boards U, and the interrogator 3 is connected to the housing information board U to control the housing information board U instead of the crime prevention control device 4. It is also possible. The interrogator 3 may be configured integrally with a control device such as the crime prevention control device 4 or the electric lock control device 5.

(Embodiment 2)
In this embodiment, as shown in FIG. 6, a plurality (two in the illustrated example) of human body detection devices 1A and 1B are arranged in a line along the corridor R, and each human body detection device 1A and 1B has a detection range A2a and A2b. When the human body detection signal output when the presence of a person is detected is received by the security control device 4 via the interrogator 3, the entrance is based on the order in which the control unit 40 receives the two human body detection signals. It is characterized in that the movement direction of the person (resident M) with respect to the door 7 is determined and the control content (setting / cancellation of the warning mode) related to the security device is switched according to the movement direction. However, since the basic configuration of the present embodiment is common to that of the first embodiment, the same reference numerals are given to common components, and illustration and description thereof are omitted as appropriate.

  The two human body detection devices 1A and 1B have the same configuration as that of the human body detection device 1 in the first embodiment, and are connected to the interrogator 3 via the signal lines Lx1 and Lx2, respectively. The detection device 1A is embedded in the wall W between the interrogator 3 and the entrance door 7, and the other human body detection device 1B is embedded in the wall W at a position away from the entrance door 7 with the interrogator 3 in between. It is arranged. The detection ranges A2a and A2b of the two human body detection devices 1A and 1B are both included in the communicable range A1 by the electromagnetic waves of the interrogator 3 and set so as not to overlap each other (see FIG. 6).

  As shown in FIG. 7, the interrogator 3 has the same configuration as that of the first embodiment, and a human body detection signal (hereinafter referred to as “first human body detection”) transmitted from one human body detection device 1A via the signal line Lx1. And a human body detection signal (hereinafter referred to as a “second human body detection signal”) transmitted from the other human body detection device 1B via the signal line Lx2. Can be received separately via the human body detection device interface 37. The interrogator controller 34 receives the first and second human body detection signals within a predetermined time (a time sufficient for a person to walk past the two human body detection devices 1A and 1B) and from the responder 2 When the same identification code is received twice, it is determined that “going out” if the first human body detection signal is received first, and “going home” if the second human body detection signal is received first. A discrimination code indicating a discrimination result of “going out” or “return home” is transmitted to the security control device 4 through the external interface 38 together with the identification code. That is, when the resident M goes out, the corridor R passes in a direction away from the entrance door 7, so that the first human body detection signal is output first from the human body detection device 1 </ b> A closer to the entrance door 7, and the entrance door The second human body detection signal will be output later from the human body detection device 1B far from 7, and when the resident M returns home, he passes through the corridor R in a direction approaching the entrance door 7, so that the entrance door 7 This is because the second human body detection signal is output first from the far body detection device 1B, and the first human body detection signal is output later from the human body detection device 1A closer to the entrance door 7. .

  When the identification code and the discrimination code are input via the interrogator interface 41, the control unit 40 of the crime prevention control device 4 decrypts the encrypted identification code and then compares it with an identification code registered in advance in a memory (not shown). If the identification code is “going out”, the warning mode is set and the lock permission signal is transmitted to the electric lock control device 5 via the communication interface 47. If the determination code is “going home”, the warning mode is set. In addition, the unlocking permission signal is transmitted to the electric lock control device 5 through the communication interface 47.

  In the electric lock control device 5, when the lock permission signal or the unlock permission signal transmitted from the crime prevention control device 4 via the communication interface 51 is input to the control unit 50, the electric lock drive unit 52 passes the signal line Lv. Then, the electric lock 6 is locked or unlocked by transmitting the drive signal.

  Thus, according to the present embodiment, the movement direction (going out or going home) of the person (resident M) with respect to the entrance door 7 is determined based on the order in which the plurality of human body detection devices 1A and 1B detect the presence of the person. At the same time, the security mode control device 4 is set / released according to the moving direction and the electric lock control device 5 is locked / unlocked. Appropriate control becomes possible.

It is operation | movement explanatory drawing of Embodiment 1 of this invention. It is a system block diagram same as the above. It is a block diagram of a responder and an interrogator in the same as above. It is another system block diagram same as the above. It is a further another system block diagram same as the above. It is operation | movement explanatory drawing of Embodiment 2 of this invention. It is a block diagram of the interrogator in the same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Human body detection apparatus 2 Response machine 3 Interrogator 4 Crime prevention control apparatus 5 Electric lock control apparatus 6 Electric lock 7 Entrance door A1 Communication range A2 Detection range

Claims (3)

A responder that stores a unique identification code and has a function of transmitting the identification code using a radio signal, inquires of the responder about the identification code using a radio signal, and receives an identification code returned from the responder An interrogator, a control device that controls a security device for monitoring or defending the target area, and a human body detection that detects the presence of a person within the detection range using the vicinity of the entrance to the target area outside the target area as a detection range With the device,
The interrogator receives a first wireless transmission means for transmitting an activation signal in the first wireless communication system, and a first wireless communication system for receiving an identification code from the responder in a second wireless communication system different from the first wireless communication system. A first signal transmission means for transmitting a signal between the wireless reception means and the control device, and a first wireless transmission means when the human body detection device detects the presence of a person within the detection range. Interrogator control means for transmitting and transmitting the identification code received by the first wireless reception means from the first signal transmission means to the control device;
The first wireless transmission means includes a transmission antenna that is configured by a coil and a capacitor and transmits a signal using an electromagnetic wave, and an LF transmission unit that transmits the activation signal from the transmission antenna using an electromagnetic wave. The radio receiving means includes a receiving antenna that receives a radio signal using radio waves as a medium, and an RF receiving unit that demodulates the radio signal received by the receiving antenna.
The transponder includes: a second wireless reception unit that receives an activation signal in the first wireless communication method; a second wireless transmission unit that transmits an identification code in the second wireless communication method; Until the reception signal is received by the reception means, the second wireless transmission means is in a stopped state without power consumption. When the second wireless reception means receives the activation signal, the second wireless transmission means is operated and identified by the wireless signal. Responder control means for transmitting a code, and a battery for supplying an operating power for each means,
The second wireless receiving means includes a receiving antenna configured to receive the activation signal configured by a coil and a capacitor and transmitted by electromagnetic waves, and an LF receiving unit that demodulates a signal received by the receiving antenna. The second wireless transmission means includes a transmission antenna that transmits a radio signal using radio waves as a medium, and an RF transmission unit that transmits a radio signal from the transmission antenna.
When the control device matches the second signal transmission means for performing signal transmission with the interrogator and the identification code received by the second signal transmission means by matching with a previously registered identification code, the security device Control means for performing control relating to,
A security system characterized in that the detection range of the human body detection device is narrower than the communicable range of the first wireless transmission means, and the detection range is included in the communicable range. The interrogator control means causes the unique interrogator ID assigned in advance to be transmitted together with the activation signal from the first wireless transmission means by a wireless signal,
The transponder control means operates the second radio transmission means only when the interrogator ID received together with the activation signal by the second radio reception means matches the pre-registered interrogator ID, and is identified by the radio signal. The security system according to claim 1, wherein the code is transmitted. A plurality of human body detection devices are arranged along the direction of travel to the entrance and exit outside the target area,
The control device comprises a human body detection signal receiving means for receiving a human body detection signal output when each human body detection device detects the presence of a person within the detection range,
When the human body detection signal receiving unit receives human body detection signals from a plurality of human body detection devices, the control unit of the control device determines the movement direction of the person with respect to the entrance and exit based on the order in which the human body detection signals are received. 3. The security system according to claim 1, wherein the control content related to the security device is switched in accordance with the moving direction.

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