JPH07203077A - Crime prevention reporting system - Google Patents

Abstract

PURPOSE:To detect the occurrence of a fault despite the disconnection of a telephone circuit by outputting a monitor signal to a general subscriber telephone circuit from a monitor signal oscillator after the signal showing the disconnection of the telephone circuit is received from a disconnection detector means. CONSTITUTION:A control part 21 receives a disconnection signal from a disconnection detecting part 22 and outputs a stop signal to a monitor signal oscillator 5. Thus the monitor signal is never superposed on an incoming line 31 so that the occurrence of disconnection is reported to a center from the nearest switchboard. Under such conditions, however, it is impossible for the center to concretely and directly know the relevant situation. Then the center can indirectly know the situation since the occurrence of disconnection is reported from an exchange station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects the presence or absence of an abnormality in a surveillance area based on signals from various sensors, and when an abnormality occurs, a predetermined location of a security company or the like through a general subscriber telephone line. The present invention relates to a crime prevention reporting system that reports that an abnormal condition has occurred in the.

[0002]

2. Description of the Related Art Conventionally, there has been known a crime prevention reporting system which guards an office building or a general household and reports to a center when an abnormality occurs such as an intruder. FIG. 2 shows a schematic configuration example thereof.

The crime prevention notification device 1 is arranged at an appropriate place in a place to be guarded such as an office building or a general home. And a heat ray sensor, a beam sensor,
Various sensors S such as a glass breakage sensor are connected. Here, the heat ray sensor detects an object that radiates far infrared rays by a pyroelectric element, and the beam sensor is
A projector that projects infrared rays and a photodetector that detects infrared rays projected from the projector are arranged to face each other, and both are known as sensors for detecting an intruder. The glass breakage sensor is a sensor that detects that the window glass has been broken. These sensors S are always operating.

By the way, in the crime prevention reporting system,
There are two states, an alert state and an alert release state. Normally, when there is movement of a person during the daytime, the alert is released, and in this state an abnormality occurs even if the sensor S outputs a warning signal. Although it is not determined that the crime prevention alarm device 1 is in an alert state when it becomes unattended at night or the like, and the sensor S outputs a warning signal at this time, the crime prevention notification device 1 determines that an abnormality has occurred and a crime prevention bell (not shown). And crime prevention siren (not shown)
In addition to ringing the alarm, information about the alarm signal is sent via the line 3 to indicate what kind of abnormality has occurred in the center device 2 arranged at a predetermined location (hereinafter referred to as the center) of a security company or the like. To do.

The alarm signal is a signal output when the sensor S detects that the sensor S is in a predetermined state.
Specifically, the heat ray sensor outputs when a moving object that radiates far infrared rays is detected, and the beam sensor detects that the amount of light received by the light receiver is below or below a predetermined amount. It is output when the window glass is broken in the glass breakage sensor. The same applies to the other sensors.

With this, it is possible to know what kind of abnormality has occurred in which place on the side of the center device 2. The notification to the center device 2 is performed based on a predetermined information transmission method.

In the past, a dedicated line was used as the line 3, but recently, a general subscriber telephone line (hereinafter simply referred to as a telephone line) has begun to be used as the line 3, and in this case, crime prevention is required. A disconnection detection service is provided for the purpose of ensuring reliability as a reporting device.

The disconnection detection service detects whether or not the telephone line to which the crime prevention reporting device is connected is disconnected, and when a disconnection is detected, the telephone number registered in advance is automatically detected. This is a service for notifying that a wire has been disconnected by dialing, and the outline thereof will be described below with reference to FIG.

As shown in FIG. 3, the crime prevention notification device 1 is installed on the user 9 side, but in addition to this, a supervisory signal oscillator 5 is installed. The supervisory signal oscillator 5 constantly outputs a predetermined supervisory signal, and the supervisory signal output from the supervisory signal oscillator 5 is superimposed on the telephone line 3. A continuous wave of 7.8125 kHz is currently used as the monitor signal.

The nearest exchange 6 is provided with a supervisory signal monitor 7. The supervisory signal monitoring unit 7 detects the presence or absence of a supervisory signal on the telephone line 3, and when the supervisory signal cannot be detected, determines that the telephone line is disconnected,
The telephone number of the center 10 registered in advance in the exchange 8 of the exchange 6 is automatically dialed to notify that a disconnection has occurred.

By performing the above operation, when the telephone line 3 is disconnected, it is possible to confirm that the center 10 side is disconnected. Note that the sensor is omitted in FIG.

[0012]

By the way, when switching the line used in the existing crime prevention notification system from the dedicated line to the telephone line, it is necessary to newly provide the supervisory signal oscillator 5, but the installation work is easy. In consideration of the above, it is considered that the supervisory signal oscillator 5 is often attached to the connection portion of the service line of the telephone line and the indoor wiring of the user. That is, as shown in FIG.
The position indicated by 0 of A have been lead-3 ₁ branched by the branching means 11 from the main 3 ₀ telephone line is drawn,
At this point A, the lead-in wire 3 ₁ and the indoor wiring 3 ₂ for the telephone in the house 10 are usually connected, but in such a case, when the supervisory signal oscillator 5 is connected to this point A It is thought that there are many. This is because, in this way, it is not necessary to add any action to the crime prevention notification device 1, and it suffices to connect the supervisory signal oscillator 5 to the point A, so that the labor for construction can be minimized. In FIG. 4, the supervisory signal oscillator 5 is placed outdoors, but it goes without saying that it may be placed inside the house 10.

However, when the supervisory signal oscillator 5 is connected as shown in FIG. 4, the supervisory signal from the supervisory signal oscillator 5 is not superposed on the main line 3 ₀ when the lead-in line 3 ₁ is disconnected. (not shown in FIG. 4) nearest exchange but can be determined that the telephone line has been disconnected, the monitoring signal is superimposed on the main line 3 ₀ if the indoor wiring 3 ₂ breaks by any cause like Therefore, the nearest exchange cannot judge that the telephone line is disconnected,
Therefore, if there is an intruder at this time, the center device cannot be notified that an abnormal situation has occurred.

The present invention is intended to solve the above problems, and the occurrence of an abnormality can be detected on the side of the center device even when the telephone line between the supervisory signal oscillator and the crime prevention reporting device is disconnected. The purpose is to provide a crime prevention reporting system.

[0015]

In order to achieve the above-mentioned object, the crime prevention reporting system of the present invention is provided with various sensors and detects the occurrence of an abnormality in the alert state based on the signals from these sensors. In this case, in a crime prevention reporting system that reports the occurrence of an abnormality to the center device via a general subscriber telephone line, a supervisory signal oscillator that outputs a supervisory signal for disconnection detection on the general subscriber telephone line, and a disconnection detecting means, And a control unit for stopping the output of the supervisory signal output from the supervisory signal oscillator to the general subscriber telephone line when the signal indicating the disconnection is received from the disconnection detection unit.

[0016]

When the control means receives the signal indicating the disconnection from the disconnection detection means, it stops outputting the supervisory signal from the supervisory signal oscillator onto the general subscriber telephone line.

As a result, the nearest exchange station determines that the telephone line to the crime prevention notification system has been disconnected. As a result, the telephone number registered in the exchange is notified that a disconnection has occurred.

Therefore, when the intruder intentionally tries to interrupt the notification of the occurrence of an abnormal situation to the center device and disconnects the indoor telephone line, the information indicating that there is an intruder is directly transmitted to the center device. Although no notification is sent to the center device, a notification indicating that the wire has been disconnected is sent to the center device from the nearest exchange of the crime prevention notification system, so that the center device side can indirectly know that an abnormal situation has occurred.

[0019]

Embodiments will be described below with reference to the drawings.
FIG. 1 is a diagram showing a configuration of an embodiment of a crime prevention notification system according to the present invention, in which 21 denotes a control unit and 22 denotes a disconnection detection unit. The same components as those shown in FIG. 4 are designated by the same reference numerals.

In FIG. 1, a control unit 21 centrally manages the operation of the crime prevention notification device 1, and is composed of a microprocessor and its peripheral circuits. Although various sensors are connected to the control unit 21, they are omitted in FIG.

The disconnection detector 22 detects the disconnection by constantly monitoring the current or voltage on the indoor wiring 3 _{2. When} the disconnection occurs, a disconnection signal indicating that the disconnection has occurred is sent. It is output to the control unit 21. It is well known that the disconnection is detected by monitoring the current or voltage on the telephone line, and the detailed description thereof will be omitted.

The supervisory signal oscillator 5 always outputs the supervisory signal to the lead-in line 3 ₁ in the same manner as described above.
When the stop signal is received from 1, the operation is stopped.

Now, in the configuration shown in FIG. 1, the control unit 2
1 performs the same operation as the conventional one. That is, when a warning signal is received from a sensor (not shown in FIG. 1) in the alert state, it is determined that an abnormality has occurred, and a crime prevention bell (not shown)
And with sound the burglar siren (not shown), information about the alarm signal, the indoor wiring 3 _2, via a drop line 3 ₁ and the main line 3 _0, the center apparatus 2 (not shown in FIG. 1) Report what kind of abnormality has occurred. Also,
The control unit 21 exchanges necessary data with the center device 2.

Upon receiving the disconnection signal from the disconnection detector 22, the controller 21 outputs a stop signal to the supervisory signal oscillator 5. Since the monitoring signal is not superimposed thereto by the upper feedthrough 3 _1, disconnection from the nearest exchange to the center side is notified that occurred as described above. Therefore, in this case, it is not possible to directly and directly know what kind of situation is occurring on the side of the center, but since the switching center is notified of the disconnection, it is possible to indirectly You can know that an abnormal situation has occurred.

When the lead-in wire 3 ₁ is disconnected, the supervisory signal is not superimposed on the telephone line as described above, but the disconnection detection unit 22 detects the disconnection also at this time, so the control unit It is natural that the disconnection signal is output to 21 and, as a result, the operation of the supervisory signal oscillator 5 is stopped.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications can be made. For example, in the above embodiment, when the disconnection detection unit 22 detects disconnection, the operation of the supervisory signal oscillator 5 is stopped, but a switch is provided between the supervisory signal oscillator 5 and the point A in FIG. It goes without saying that the monitoring signal may not be output on the lead-in line 3 ₁ by opening the switch.

Further, in the above embodiment, the crime prevention reporting device 1 has the built-in disconnection detecting section 22, but when using the crime prevention reporting device having no disconnection detecting function,
A commercially available disconnection detector may be provided. In that case, the disconnection detector should be the indoor wiring 3 _{2 of the} crime prevention reporting device.
It is desirable to connect to the connection end with.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a diagram showing a configuration example of a crime prevention alarm system.

FIG. 3 is a diagram for explaining a disconnection detection service.

FIG. 4 is a diagram for explaining a problem to be solved by the present invention.

[Explanation of symbols]

1 ... Crime prevention notification device, 2 ... Center device, 3 ... Telephone line,
5 ... Supervisory signal oscillator, 6 ... Exchange station, 7 ... Supervisory signal monitoring section, 8 ... Exchange, 21 ... Control section, 22 ... Disconnection detecting section.

Claims (1)

[Claims] Claims: 1. A crime prevention report provided with various sensors, and when the occurrence of an abnormality is detected based on the signals from these sensors in the alert state, the center apparatus is notified of the occurrence of the abnormality via a general subscriber telephone line. In the system, the supervisory signal oscillator that outputs the supervisory signal for detecting disconnection to the general subscriber telephone line, the disconnection detection means, and the supervisory signal oscillator when the signal indicating the disconnection from the disconnection detection means is received. A crime prevention notification system, comprising: a control unit for stopping the output of the output monitoring signal to the general subscriber telephone line.