JP2002074557A - Method for inspecting sensor circuit in security system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for inspecting a sensor circuit in a security system for making the security system function soundly coping with the abnormality of a sensor by constantly monitoring the abnormality of the sensor during the release of security by a monitoring center, etc. SOLUTION: The security system obtained by installing abnormality detection sensors S1 to Sn constantly in a detecting state for security against an invader within a security area connecting the sensors S1 to Sn with the monitoring sensor through a communication line to inform the monitoring center of the presence/absence of the invader detects the presence/absence of a detection signal from the sensors S1 to Sn during the release of security in the security system and judges the sensor to be abnormal when there is not any sensor detection signal within a set time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting a sensor circuit in a security system in which a detection signal of an abnormality detection sensor for security of an intruder is discriminated and released while the security is released.

[0002]

2. Description of the Related Art Conventionally, an abnormality detection sensor for intruder security has been installed in a security area, and a detection signal from an abnormality detection sensor during the period from security start to security release is detected in a security area. A security system that makes a distinction and notifies the monitoring center via a communication line is well known. Even if the abnormality detection sensor detects a person who is out of the security target while the security is released, it is not notified to the monitoring center. The detection signal of the abnormality detection sensor during the cancellation is not used at all to detect the presence or absence of an abnormality.

[0003]

However, if the contacts of the sensor circuit are fused by a lightning surge or if an infrared sensor is intentionally covered by an object that intends to penetrate, these sensors will always be a person or object. Thus, a state is detected in which it is detected that there is no movement of the intruder. Therefore, even if there is an intruder, the intruder cannot be detected, and there is a problem that security becomes impossible.

At present, workers regularly check the sensors, but they have a problem that they lack responsiveness and are troublesome.

[0005]

SUMMARY OF THE INVENTION According to the present invention, an environment change which is artificially changed due to the activity of a person or the like entering a security area during security release is provided as a signal of an abnormality detection sensor installed for crime prevention. Signal judgment placed in or near the area
It is recognized by the alarm device, and if there is a signal from the abnormality detection sensor within the set time, it is determined that the abnormality detection sensor is functioning, and if there is no signal from the abnormality detection sensor within the set time, the abnormality detection sensor function is abnormal Is determined, and an alarm is transmitted to the monitoring center.

[0006]

[Function] Normally, when an abnormality detection sensor installed in a security area changes a certain condition from the start of security to the release of security, a detection signal judgment / notification device determines the condition when the abnormality detection sensor installed in the security area is remote. The monitoring center is notified via a communication line.

Therefore, during the security by the security system, if a signal change exceeding a certain level does not occur in the abnormality detection sensor, or if a failure that cannot be notified to the detection signal determination / reporting device occurs even if the change occurs, the detection signal determination / reporting device is used. On the side, since the signal from the abnormality detection sensor does not change more than a certain amount, no abnormality occurs.

As described above, in the conventional security system, the signal from the abnormality detection sensor during security release is not considered as being out of the scope of security.

[0009] However, if the state where the signal transmitted from the abnormality detection sensor to the detection signal determination / notification device does not change artificially or due to a failure while the security is released,
Even when the security area is in a security state, the monitoring center is not notified of the abnormality at all. That is, even if a person enters the security area during security, the security system will not operate.

According to the present invention, the fact that a person always enters and exits the security area during security release is utilized to notify the opening / closing of the door and the movement of the person, which must naturally come within a set time. If the detection signal of the abnormality detection sensor does not come to the detection signal judgment / notification device, it is reported to the remote monitoring center as an abnormality of the abnormality detection sensor, the relevant person is notified, or the alarm is issued in the security area, and the system is checked. It can be performed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of a remote monitoring and security system, the basic configuration of which is as follows.

The abnormality detection sensors S1 to Sn are installed in a security area, and are always in a detectable state during security and during security cancellation.

The detection signal judging / notifying device 1 is usually installed in a security area.
The security state and the security release state are formed by operating the release operation device 2. The security start / cancel operation device 2 is installed in the security area or outside the security area.

As shown in FIG. 2, for example, the abnormality detecting sensors S1 to Sn include magnet sensors S1 and S2 for detecting opening and closing of a door, and infrared sensors S3 and S4 for detecting movement of a person or an object in a room. , These sensors S1 to Sn are wired or wireless, and the detection signal determination / notification device 1
It is connected to the.

The abnormality detection sensors S1 to Sn are connected to the detection signal judging / notifying device 1 individually in parallel or by bus connection.

Security start / release operation device 2 and detection signal judgment
The notification device 1 is connected by wire or wirelessly, and the detection signal determination / notification device 1 is connected to the monitoring device of the monitoring center 3 by a communication line (public telephone line or dedicated telephone line).

Next, the start and end of security will be described. When the security start / cancel operation device 2 is turned ON, a security start state is formed. In this state, when the abnormality detection sensors S1 to Sn placed in the security area detect an abnormality, the detection signal is transmitted from the abnormality detection sensors S1 to Sn to the detection signal determination / notification device 1.

During the period from when the security start / cancel operation device 2 is turned on to when the security start / cancel operation device 2 is turned off, that is, during security by the security system, the detection signal judging / notifying device 1 operates as the abnormality detection sensor S1. When the detection signal of Sn is received, the name of the building where the detection signal determination / notification device 1 is installed on the communication line 4, the name of the abnormality detection sensor that has detected the abnormality, and the like.
The required information is reported to the remote monitoring center 3. When the security start / cancel operation device 2 is turned off, security in the security area is cancelled.

When the security start / cancel operation device 2 is installed outside the security area, the security state is immediately set by turning on the security start device 2, but the security start / cancel operation device 2 is set.
Is installed in the security area, after the security start / release operation device 2 is turned on, security is started by a timer, etc. until the operator of the security start / release operation device 2 leaves the security area. The time is delayed and a security state is formed.

In any of the above cases, during the period from the release of security to the start of security, the abnormality detection sensors S1 to Sn installed in the security area detect the movement of a person or an object, and the detection signal is detected. Even if sent to the signal judgment / notification device 1, the detection signal judgment / notification device 1 does not emit an alarm signal.

According to the present invention, intrusion detection sensors S1 to Sn for intruder security are installed in the security area as described above, and these abnormality detection sensors S1 to Sn are connected to the monitoring center 3 via the communication line 4 to intrude. In the security system in which the presence or absence of a person is notified to the monitoring center 3, the abnormality detection sensors S1 to Sn during the security cancellation in the security system.
This is a sensor circuit inspection method in a security system that detects the presence or absence of a detection signal from a sensor, and judges that there is an abnormality when the sensor detection signal is absent within a set time and reports the abnormality.

That is, if there is no detection signal from the abnormality detection sensors S1 to Sn within the time set in the detection signal determination / notification device 1, the communication line 4 is sent to the monitoring center 3 with the name of the abnormality detection sensor that does not emit a detection signal. Notify via Or notify the concerned parties or issue a warning in the security area.

FIG. 3 shows the abnormality detection sensors S1 to Sn.
1 illustrates the relationship between an internal configuration of a detection signal determination / notification device 1 for performing an inspection operation during security release and a security start / release operation device 2.

The detection signal determination / notification device 1 has an abnormality detection unit 5, a notification unit 6, and a display unit 7. Signals from the abnormality detection sensors S1 to Sn are input to the abnormality detection unit 5 of the detection signal determination / notification device 1. The output of the abnormality detection unit 5 is input to the notification unit 6. In addition, O of security start and release operation device 2
The N / OFF signal is input to the notification unit 6 and the abnormality detection unit 5.

The output signal of the notification unit 6 is input to the monitoring device of the monitoring center 3 through the communication line 4 and, in parallel, the display unit 7
Is input to

FIG. 4 shows the internal structure of the abnormality detection unit 5. The operation of the abnormality detection unit 5, the notification unit 6, and the security start / cancel operation unit 2 for the abnormality detection sensors S1 to Sn will be described based on this. The configuration will be described.

When the security start / release operation device 2 is turned off (security release), the counter 8 starts counting time.

During this time, if there is a detection signal from any of the abnormality detection sensors S 1 to Sn, it is stored in the memory 9.
When a preset time has elapsed, the counter 8
A signal is sent to the signal determination unit 10. At the same time, the counter 8 resets the count and starts counting again.

The counter 8 stops counting when the security start / release operator 2 is turned on (security state) during counting, and counts again when the security start / release operator 2 is turned off next. To start.

When the detection signal stored in the memory 9 is zero, that is, when there is no detection signal from any of the abnormality detection sensors S1 to Sn within a set time, the signal determination unit 10 notifies the notification unit 6. Sends a sensor error signal. If there is an abnormality detection signal in the memory 9, a memory clear signal is issued to clear the memory 9.

Therefore, if a detection signal is not received from the abnormality detection sensors S1 to Sn connected to the detection signal determination / notification device 1 within a set time from the release of security to the start of security, that is, during the release of security, the security is released. Even inside, the detection signal determination / notification device 1 has a function of notifying the monitoring center 3 of the corresponding sensor names of the abnormality detection sensors S1 to Sn via the notification unit 6.

The set time is set for each of the abnormality detection sensors S1 to Sn or for each abnormality detection sensor group.

The security release is usually performed in order for a person to enter the security area. Therefore, after the security is released, the abnormality detection sensors S1, S in the security area illustrated in FIG.
The normal operation is performed in the room where the abnormality detection sensors S3 and S4 for opening and closing the door to which the device 2 is attached and for detecting the human are installed.

During this time, the abnormality detection sensor S in the security area
1 to S4 perform an operation of detecting the activity of a person who has entered the area and the opening and closing of the door, and send a detection signal to the detection signal determination / notification device 1. Not performed.

On the other hand, if there is an abnormality in the sensor circuit between the abnormality detection sensors S1 to Sn and the detection signal determination / notification device 1 including the abnormality detection sensors S1 to Sn itself, the detection signal determination / notification device is sent from the abnormality detection sensor. There is no signal to one.

According to the present invention, if a sensor detection signal to be naturally generated is not input to the detection signal determination / notification device 1 within a set time due to a human activity entering the security area or opening / closing of the door while the security is released, this is determined. Assuming that the sensor is abnormal, the detection signal determination / notification device 1 transmits a sensor abnormality signal to the remote monitoring center 3, and further, if necessary, the detection signal determination / notification device 1
Is displayed on the display unit 7 or is sounded. Or, notify the concerned person such as a manager.

As shown in FIG. 5A, the set time is equally divided into the security release time, and the sensor check is repeated at each set time H1 to Hn. In this case, the counter 8 and the memory 9 are repeatedly cleared at every set time H to Hn, and are restarted.

Alternatively, the set time is as shown in FIG.
The sensor is checked at the time H which is equal to the security release time.

The above H1 to Hn are abnormality detection sensors S1
Depending on the installation location of Sn, there are places where human activities are frequently performed and the abnormality detection sensor is frequently operated, and places where it is not so. Therefore, the set time is changed for each abnormality detection sensor.

The set time is calculated from the previous operation time of each abnormality detection sensor or from the release of security.

[0041]

According to the present invention, the abnormality of the sensor can be constantly monitored at the monitoring center or the like while the security is released, and the sensor abnormality can be immediately responded to, so that the security system can function properly.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an outline of a security system.

FIG. 2 is a plan view illustrating a sensor arrangement in a security area.

FIG. 3 is a block diagram illustrating an internal configuration of a detection signal determination / notification device in the security system.

FIG. 4 is a block diagram illustrating a configuration of an abnormality detection unit in the detection signal determination / notification device.

FIGS. 5A and 5B are time charts of a set time for detecting the presence or absence of a sensor signal.

[Explanation of symbols]

 S1 to Sn abnormality detection sensor 1 detection signal judgment / notification device 2 security start / release operation device 3 center 4 communication line 5 abnormality detection unit 6 notification unit 7 display unit 8 counter 9 memory 10 signal judgment unit

Claims (1)

[Claims] 1. An intrusion detection sensor which is always in a detection state for intruder security is installed in a security area, and the abnormality detection sensor is connected to a monitoring center via a communication line to notify the monitoring center of the presence or absence of an intruder. In a security system configured to detect the presence or absence of a detection signal from an abnormality detection sensor during security release in the security system, and determine that there is an abnormality when the sensor detection signal is absent within a set time and report the abnormality. A method for inspecting a sensor circuit in a security system characterized by the following.