JPH11144160A - Security sensor and guard system using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To identify if he is a normal employee when the person is detected. SOLUTION: A thermal sensor S sends an ID request code by radio when it detects a moving object. An employee 9 holds a portable card 9 and the card 9 sends an identification number that is allocated to itself by radio when it receives the ID request code. When the sensor S receives the identification number from the card 9, the sensor 9 stores it. The sensor S performs communication through polling with a security device 1 and when the sensor S is accessed by the device 1, it sends the identification number received from the card 9 to the device 1. Because a main controlling part 2 of the device 1 shows data that are received from the sensor S on a displaying part 4, it is possible to know that an employee with which identification number is detected by which thermal sensor S by observing the part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security sensor such as a heat ray sensor or a beam sensor, and a security system using the security sensor. In particular, when an object is detected by the security sensor, the object is registered properly. The present invention relates to a security sensor capable of identifying whether or not a person is a person, and a security system using the same.

[0002]

2. Description of the Related Art There is known a security system for detecting an intruder using a hot-wire sensor. However, in the conventional system, an object detected by the hot-wire sensor is a legitimate object. It was not possible to distinguish between an employee and an intruder.

[0003] However, it is clear that it is useful to be able to identify whether the object detected by the hot-wire sensor is a legitimate employee. For example, it is conceivable that an alert state may be set erroneously in spite of the fact that an employee still remains.In this case, when an object is detected by the hot-wire sensor, the detected If it can be identified as an employee, it can be determined that there has been an intruder and that the alert state has been set by mistake despite the presence of a remaining employee. Also, if the alert state is not set until late, if the residual person is detected by the heat ray sensor and the detected residual person can be identified as a regular employee,
Instead of forgetting to be alert, you can know that a legitimate employee is still working.

[0004] While the security system using a heat ray sensor has been described above, the same applies to a security system using a beam sensor in which a light emitter and a light receiver are arranged to face each other. In this specification, the heat ray sensor and the beam sensor are collectively referred to as a security sensor.

Accordingly, an object of the present invention is to provide a security sensor capable of identifying whether or not a detected object is a person having an identification number registered in advance, and a security system using the same. It is.

[0006]

In order to achieve the above object, the security sensor according to the first aspect is characterized in that when an object is detected, a signal for requesting the transmission of an identification number is transmitted wirelessly. .

A security sensor according to a second aspect of the present invention is a security sensor for detecting an object, wherein the security sensor wirelessly emits a signal requesting the transmission of an identification number at a predetermined period.

Further, a security system according to claim 3 is a security system comprising a security device and a security sensor connected to the security device, wherein the security device and the security sensor can communicate with each other, In addition, the security sensor wirelessly emits a signal requesting transmission of an identification number when detecting an object.

Further, the security system according to claim 4 is a security system including a security device and a security sensor connected to the security device, wherein the security device and the security sensor can communicate with each other. In addition, the security sensor wirelessly emits a signal requesting the transmission of the identification number at predetermined predetermined intervals.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment when a security system according to the present invention is constructed by a hot-wire sensor, and FIG. 2 is a diagram showing one embodiment when a security sensor according to the present invention is applied to a hot-wire sensor. In the figure, 1 is a security device, 2 is a main control unit, 3 is a communication control unit, 4 is a display unit, 5
Is a setting device, 6 is an identification number table, 9 is a mobile card,
L is a communication line, S is a heat ray sensor, 10 is a sensor head,
Reference numeral 11 denotes an A / D converter (hereinafter, referred to as ADC), 12 denotes a control unit, 13 denotes a communication control unit, 14 denotes a transmission / reception unit, and 15 denotes an antenna.

The security device 1 includes a main control unit 2, a communication control unit 3, and a display unit 4. The main control unit 2 is composed of a processing unit including a CPU and its peripheral circuits, and manages the operation of the security device 2 in an integrated manner. The main control unit 2 manages the identification number table 6. In the identification number table 6, an identification number assigned to the mobile card 9 described later and the name of the employee assigned the identification number are written in correspondence.

The communication control unit 3 performs communication with each of the heat ray sensors S by polling, and sequentially accesses each of the heat ray sensors S at a predetermined time or at a predetermined time. An operation of receiving the data sent from S and passing it to the main control unit 2 is performed. Display unit 4
Is composed of a display device such as a CRT and a liquid crystal display device, and displays various data under the control of the main control unit 2. Although the display unit 4 is shown as being integrated with the security device 1 in FIG. 1, the display unit 4 may be formed separately from the security device 1. Although only one loop of the heat ray sensor is shown in FIG. 1, this is to avoid complicating the drawing, and generally, a plurality of loops of the heat ray sensor can be connected.

An operating device 5 is connected to the main control unit 2.
The operating device 5 is for switching the guard state of the guard area in which the loop of the heat ray sensor S is disposed, that is, for switching from the guard state to the release state or for switching from the release state to the guard state. Yes, usually
This is called a remote controller or the like. Although the operation device 5 is separate from the security device 1 in FIG. 1, the operation device 5 may be integrated.

The security device 1 may be provided with a siren or the like for intimidating an intruder, and may be provided with a function of notifying an abnormality to a security center of a security company when an abnormality occurs. Needless to say, these are not essential matters in the present invention, and therefore description thereof is omitted.

As shown in FIG. 2, the hot-wire sensor S includes a sensor head 10, an ADC 11, a control unit 12, and a communication control unit 1.
3, a transmission / reception unit 14 and an antenna 15. The sensor head 10 includes a pyroelectric element and its circuit system, an optical system such as a reflecting mirror for forming a warning zone, and the like. Since the configuration of the sensor head 10 is well known, a detailed description is omitted.

The detection signal from the sensor head 10 is an ADC
11, digitized and supplied to the control unit 12. The control unit 12 performs a process for detecting the presence or absence of a moving object that radiates a heat ray (hereinafter, simply referred to as a moving object) based on a digital detection signal from the ADC 11. In addition,
A process for detecting the presence or absence of a moving object based on a digital detection signal from the ADC 11 is well known, and thus a detailed description is omitted.

When the control unit 12 determines that there is a moving object, it instructs the transmitting / receiving unit 14 to transmit a code for requesting transmission of an identification number (hereinafter, referred to as an ID request code). In response, the transmitting / receiving unit 14 wirelessly transmits the ID request code from the antenna 15.

The ID wirelessly transmitted from the antenna 15
When the data of the identification number wirelessly transmitted from the portable card 9 described later is received by the antenna 15 in response to the request code,
The transmission / reception unit 14 passes the received identification number to the control unit 12.
When receiving the identification number from the transmission / reception unit 14, the control unit 12 temporarily stores the detection of the moving object and the received identification number in an internal memory (not shown in FIG. 1).
However, when the identification number is not received from the portable card 9, the fact that the moving object is detected and the response of the identification number is not stored are stored in the memory.

The communication control unit 13 performs communication with the communication control unit 3 of the security device 1 by polling.
When accessed from the communication control unit 3 of the security device 1, the control unit 12 is notified of the fact. At this time, the control unit 12 gives the data indicating that the moving object has been detected and the identification number written in the memory to the communication control unit 13 and instructs them to transmit them. Accordingly, the communication control unit 13
Transmits to the communication control unit 3 of the security device 1 the data given by the control unit 12 indicating that the moving object has been detected, and the identification number. Thus, the data indicating that these moving objects have been detected and the identification number are received by the communication control unit 3 and passed to the main control unit 2.

However, if the identification number has not been received, the control unit 12 gives the communication control unit 13 data indicating that the moving object has been detected and data indicating that there has been no response to the identification number. , Direct them to send. At this time, the data indicating that these moving objects are detected and the data indicating that there is no response of the identification number are received by the communication control unit 3 and passed to the main control unit 2 by the above-described operation. Become.

The communication controller 13 of the heat ray sensor S
When transmitting any data to the communication control unit 3 of the security device 1, it is natural that an address assigned to itself is added.

In this security system, as shown in FIG. 1 and as apparent from the above description, a legitimate employee has a portable card 9. This portable card 9 has a configuration as shown in FIG. Transmitting / receiving unit 22
When receiving the ID request code transmitted from the hot-wire sensor S, the control unit 23 is notified of this. On the other hand, the control unit 23 gives an identification number assigned to itself to the transmitting / receiving unit 22 to instruct transmission. As a result, the identification number is transmitted from the antenna 21 by the transmission / reception unit 22. Power for the transmitting / receiving unit 22 and the control unit 23 is supplied from a battery 24. A card having a function of transmitting some data when predetermined data is received is well known. The portable card 9 can also have a function as a key card for specifying the operator of the operation device 5 described above. That is, the operation of the operation device 5 can be performed using the portable card 9.

Next, the operation of the entire security system will be described. Since the hot-wire sensor S is constantly operating, the above-described operation is performed both when the alert state is set for the alert area by the operating device 5 and when the alert state is set. That is, when the control unit 12 of the hot-wire sensor S determines that there is a moving object based on the digital detection signal from the ADC 11, it instructs the transmission / reception unit 14 to transmit an ID request code, and receives the identification number from the transmission / reception unit 14. , The detection of the moving object and the received identification number are temporarily stored in the memory, and then the security device 1
When the communication control unit 3 is accessed from the communication control unit 3, the communication control unit 13 transmits data indicating that a moving object has been detected and the received identification number to the communication control unit 3 of the security device 1. Also, the ID wirelessly transmitted by the transmitting / receiving unit 14
If the identification number as a response to the request code is not received, the detection of the moving object and the absence of the response of the identification number are stored in the memory, and thereafter, the communication control unit of the security device 1 is stored. 3, the data indicating that the moving object has been detected and the data indicating that the identification number has not been received are transmitted to the communication control unit 13.
To the communication control unit 3 of the security device 1. Furthermore, when the next access is received without detecting the moving object from the previous access from the communication control unit 3 of the security device 1, the control unit 12 of the heat ray sensor S sets the communication control unit 13
Transmits data indicating that no moving object has been detected.

When the release state is set by the operation device 5, the main control unit 2 of the security device 1 converts the data received from each heat ray sensor S by the communication control unit 3 into the heat ray transmitted from the data. Only the process of displaying on the display unit 4 together with the address of the sensor S is performed.
Even if data indicating that a moving object has been detected is received, it is not determined that an abnormality has occurred.

The details are as follows. In a case where the release state is set by the operation device 5, when data indicating that a moving object has been detected and a received identification number are received from a certain heat ray sensor S, the main control unit 2 determines the identification. Referring to the number table 6, the employee name corresponding to the received identification number is recognized, and the address of the hot-wire sensor S, the detection of the moving object, the identification number, and the corresponding employee name are displayed on the display unit 4. indicate. Therefore, by observing the display, it can be seen that the employee with the identification number is near the hot-wire sensor S at the address.

When data indicating that a moving object has been detected and data indicating that an identification number has not been received are received from a certain heat ray sensor S, the main controller 2
Displays on the display unit 4 that the address of the heat ray sensor S, that the moving object has been detected, and that the identification number has not been received. Therefore, by observing this display,
It is possible to predict whether the hot-wire sensor S has malfunctioned due to any cause or whether any problem has occurred in the hot-wire sensor S or the portable card 9, and it is possible to promptly deal with it.

Further, when data indicating that a moving object has not been detected is received from a certain heat ray sensor S, the main control unit 2 confirms that the address of the heat ray sensor S and that no moving object has been detected. It is displayed on the display unit 4.

The operation when the release state is set by the operation device 5 has been described above. The operation when the warning state is set for the security area by the operation device 5 is as follows.

In this case, when data indicating that a moving object has been detected and a received identification number are received from a certain heat ray sensor S, the main control unit 2 determines that the identification number is legitimate. Whether the identification number table 6
And if it is a legitimate one registered in the identification number table 6, the main control unit 2 does not determine that there has been an intruder, and although the employee remains, It is determined that the alert state has been set by mistake, and the display unit 4 displays the address of the heat ray sensor S, the detection of the moving object, and the identification number, and also indicates that the alert state has been set by mistake. I do. The display indicating that the alert state is set by mistake may be made by defining an appropriate pattern indicating the fact and displaying the pattern, or when the display unit 4 is a color display device such as a color CRT. What is necessary is just to display in a predetermined color. Therefore, by observing the display, it is possible to know that the alert state has been set by mistake and the names of the remaining employees.

On the other hand, if the received identification number is not registered in the identification number table 6, the main control unit 2 determines that there is an intruder, and the display unit 4
In addition to displaying the address of the heat ray sensor S, the detection of the moving object, and the received identification number, a display indicating the intruder abnormality is performed. The display indicating the intruder abnormality may be performed by setting an appropriate pattern indicating the abnormality and displaying the pattern, or when the display unit 4 is a color display device, the display may be performed in a predetermined color. Good. Therefore, by observing this display, it is possible to know which heat ray sensor S has detected the intruder, so that appropriate measures can be taken promptly.

When the alert state is set, when data indicating that a moving object has been detected and data indicating that the identification number has not been received are received from a certain heat ray sensor S, The main control unit 2 immediately determines that there is an intruder and displays on the display unit 4 the address of the heat ray sensor S, detection of a moving object, and reception of no identification number, A display indicating a user abnormality is performed. Therefore, also in this case, by observing the display on the display unit 4, it is possible to know which heat ray sensor S has detected the intruder, and it is possible to take appropriate measures promptly.

Further, when data indicating that a moving object has not been detected is received from a certain heat ray sensor S when the alert state is set, the main control unit 2 simply reads the address of the heat ray sensor S. And that no moving object is detected is displayed on the display unit 4. Therefore, by observing this display, it can be confirmed that there is no abnormality in the vicinity of the heat ray sensor S.

As described above, according to the present invention, when a moving object is detected, it can be determined whether or not the moving object is a regular employee. It becomes possible.

Note that the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, in the above embodiment, the hot-wire sensor S wirelessly transmits the ID request code when detecting the moving object, but may always transmit the ID request code at a constant cycle. In this case, every time the control unit 12 of the hot-wire sensor S transmits the ID request code, the control unit 12 stores the identification number when receiving the identification number, and when the identification number is not received, indicates that the control unit 12 did not receive the identification number. The identification number received when the communication control unit 3 of the security device 1 accesses the identification number or the fact that the identification number was not received may be transmitted.

The embodiment in which the security system according to the present invention is constructed by the heat ray sensor has been described above, but the present invention can naturally be applied to a security system using a beam sensor. In this case, polling communication is performed between the light receiving device of the beam sensor and the security device, and when an object is detected by the light receiving device or at predetermined regular intervals, the ID request code is wirelessly transmitted from the light receiving device. What is necessary is just to transmit.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment when a security system according to the present invention is constructed by a heat ray sensor.

FIG. 2 is a view showing an embodiment in which the security sensor according to the present invention is applied to a heat ray sensor, and is a view showing one embodiment of a heat ray sensor which can be used in the security system shown in FIG. 1; .

FIG. 3 is a diagram showing a configuration example of a mobile card 9;

[Explanation of symbols]

REFERENCE SIGNS LIST 1 security device 2 main control unit 3 communication control unit 4 display unit 5 setting device 6 identification number table 9 portable card 10 sensor head 11 ADC and 12 control Unit, 13: communication control unit, 14: transmission / reception unit, 15: antenna, 21: antenna, 22: transmission / reception unit, 23: control unit, 24: battery, L: communication line, S: hot-wire sensor.

Claims (4)

[Claims] 1. A security sensor which wirelessly emits a signal requesting transmission of an identification number when an object is detected. 2. A security sensor for detecting an object, wherein the security sensor wirelessly emits a signal requesting transmission of an identification number at predetermined predetermined cycles. 3. A security system comprising a security device and a security sensor connected to the security device, wherein the security device and the security sensor can communicate with each other, and the security sensor detects an object. A security system which wirelessly issues a signal requesting transmission of an identification number. 4. A security system comprising a security device and a security sensor connected to the security device, wherein the security device and the security sensor are communicable with each other, and the security sensor is provided at predetermined intervals. A security system which wirelessly issues a signal requesting transmission of an identification number.