JPH0116231Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an intruder detection device, and in particular, the components include an intruder detection relay and an intruder detection contact that are connected in series via a communication cable to form a closed loop during monitoring. In addition, a selection switch, a polarity conversion relay, a track monitoring relay, a diode for shorting the track monitoring relay, a diode for shorting the intruder detection relay, and a diode for shorting the intruder detection contact are provided. Therefore, during monitoring, intrusion by intruders, disconnection of communication cables,
The present invention relates to an intruder detection device that effectively detects not only the removal of an intruder detector but also the disconnection of a communication cable and the removal of the intruder detector during non-monitoring.

Conventional intruder detection devices include an intruder detector that detects intrusion by an outsider, a receiver that detects the operation of the intruder detector with an alarm sound, etc., and a communication between the intruder detector and the receiver. Intruder detectors are installed at doors, windows, etc. through which outsiders enter, or receivers are installed in monitoring rooms where people are permanently stationed. As an intruder detector, a relay contact or the like is used that is turned on when a door, window, etc. is closed and turned off when it is opened. As shown in FIG. 1, when the operations of multiple intruder detectors 1 are detected by one receiver 2,
The intruder detection contacts 1A of the plurality of intruder detectors 1 are connected in series through a communication cable 3 and connected to the receiver 2 so as to form a closed loop during monitoring.
When an intruder enters during monitoring, the intruder detector 1
If the intruder detection contact 1A of the receiver is turned off, if the intruder cuts the communication cable 3, or if the intruder removes the intruder detector 1, the closed loop becomes an open loop and the The intruder detection relay 4 is demagnetized and the intruder detection relay 4 is
Break contact 4B is turned on, alarm B is energized, and an alarm is issued, but the alarm is also issued when an alarm is not required, such as when someone inside enters or exits during the day or when a window is opened, that is, when not being monitored. To prevent this, the power switch SW must be turned off. Under these circumstances, if an outsider plotting a nighttime intrusion cuts the communication cable 3 or removes the intruder detector 1, an alarm will not be issued the moment the act is committed. However, there is a drawback that an abnormality can only be detected when the power switch W is turned on to monitor the building etc. at night. There was a problem in that it was difficult to find the cut point of the cable 3, and the function of the intruder detection device was not performed, making it impossible to detect the intrusion of the intruder.

This idea was created by focusing on the problems of the conventional technology, and consists of an intruder detection relay and an intruder detection contact that are connected in series via a communication cable to form a closed loop during monitoring. A selection switch, a polarity conversion relay, a track monitoring relay, a diode for shorting the track monitoring relay, a diode for shorting the intruder detection relay, and a diode for shorting the intruder detection contact. The aim is to solve the above problems.

This invention will be explained below based on the drawings.

FIG. 2 is a diagram showing an embodiment of this invention. First, to explain the configuration, 43 is a selection switch for selecting monitoring/non-monitoring, and X is a polarity conversion relay, both of which are connected in series and connected to a DC control power source.

X ₁ and X ₃ are break contacts of the polarity conversion relay X, one end of which is connected to the positive and negative sides of the DC control power source, respectively.

X ₂ and X ₄ are the make contacts of the polarity conversion relay X,
One end of it is connected to the negative side and the positive side of the DC control power supply, respectively.

The other end of break contact X ₁ is connected to the other end of make contact X ₂ , and the other end of break contact X ₃ is connected to the other end of make contact X ₄ .

Y ₁ is a line monitoring relay that is energized only when not monitoring, and D ₁ is a diode that shorts line monitoring relay Y ₁ when monitoring. Line monitoring relay Y ₁ and diode D ₁ are connected in parallel.

Y ₂ is an intruder detection relay that is energized only when _monitoring , and D ₂ is a diode that shorts intruder detection relay Y ₂ when not monitoring.
and diode _D2 are connected in parallel.

1A is the intruder detection contact of intruder detector 1, D ₃
is a diode that short-circuits intruder detection contact 1A when not monitored, and intruder detection contact 1A and diode D ₃
are connected in parallel. Diode D ₃ is housed within intruder detector 1 . The intruder detection contact 1A is one that turns on when the door or window is closed and turns off when it is opened.

Line monitoring relay Y ₁ and diode _{D 1 are} connected between the other end a of break contact X 1 (or make contact X ₂ ) and the other end b of break contact X ₃ (or make contact X ₄ ).
, a parallel circuit of intruder detection relay Y ₂ and diode D ₂ , and a parallel circuit of intruder detection contact 1A and diode D ₃ that form a closed loop of communication cable 3 during monitoring. 1 are connected in series.

X ₅ is the break contact of the polarity conversion relay X, Y ₂₁
is the break contact of intruder detection relay _Y2 , and both are connected in series.

X ₆ is the make contact of the polarity conversion relay X, and Y ₁₁ is the break contact of the track monitoring relay Y ₁ , both of which are connected in series.

The series circuit of X ₅ - Y ₂₁ and the series circuit of X ₆ - Y ₁₁ are connected in parallel, one end of which is connected to one end of alarm B whose other end is connected to a DC control power supply, The other end is connected to a DC control power source to form an alarm circuit.

Note that components other than the intruder detector 1 are housed within the receiver 2.

Next, the action will be explained.

When the power switch 8D is turned on and monitoring is selected during nighttime monitoring and the selection switch 43 is turned off, the polarity conversion relay X is demagnetized.
Make contacts X ₂ , X ₄ , and X ₆ of polarity conversion relay X are turned off, and break contacts of polarity conversion relay
X ₁ , X ₃ , and X ₅ are turned on. In this situation, _the other end a of _the break contact X _{1 has} a positive potential and _the other end b of the break contact is from the positive side of the DC control power supply to the break contact X ₁ - diode D ₁ - intruder detection relay Y ₂ - intruder detection contact 1A (on) - break contact X ₃ - to the negative side of the DC control power supply , and only intruder detection relay _Y2 is energized.

When an intruder enters and the intruder detection contact 1A turns off, and the communication cable 3 is cut or the intruder detector 1 is removed, the current is cut off and the intruder detection relay _Y2 is turned off. Demagnetized, break contact Y ₂₁ of intruder detection relay Y ₂
is turned on, alarm B is excited and issues an alarm.

Next, when monitoring is not required during the day, that is, when non-monitoring is required, with power switch 8D turned on, select non-monitoring and turn on selection switch 43, polarity conversion relay X is energized, and polarity conversion relay Make contacts X ₂ , X ₄ , and X ₆ of X are turned on, and break contacts X ₁ , X ₃ , and X ₅ of polarity conversion relay X are turned OFF. As a result, the polarity of the other end a of the break contact X ₁ is changed from a positive potential to a negative potential, and the polarity of the other end b of the break contact X ₃ is changed from a negative potential to a positive potential. Therefore, diode D ₁ is non-conductive, and diodes D ₂ and D ₃ are conductive.
Current flows from the positive side of the DC control power supply to the make contact.
X ₄ - Diode D ₃ - Diode D ₂ - Track monitoring relay Y ₁ - Make contact X ₂ - Flows to the negative side of the DC control power supply, and only track monitoring relay Y ₁ is energized.

In this state, even if intruder detection contact 1A is turned off due to opening of a door, window, etc., intruder detection contact 1
Since A is shorted by diode D ₃ ,
It does not affect the excitation of track monitoring relay Y ₁ and does not issue an alarm.

When the communication cable 3 is cut or the intruder detector 1 is removed, the current is cut off, the track monitoring relay Y ₁ is demagnetized, and the break contact Y ₁₁ of the track monitoring relay Y ₁ is turned on. Alarm B is then energized and issues an alarm. This makes it possible to instantly detect abnormal conditions such as disconnection of communication cables and removal of intruder detectors during non-monitoring periods, allowing prompt measures to be taken in response to abnormal conditions, such as discovering the person intending to intrude, and identifying the disconnection point of the communication cable. Discovery, recovery work, replenishment of the intruder detector, etc. become possible, and the original function of the intruder detection device is fully demonstrated.

The above explanation is for monitoring when the selection switch 43 is off and non-monitoring when it is on, but in order to set it to non-monitoring when the selection switch 43 is off and monitoring when it is on, as shown in FIG. In Fig. 2, connect one end of break contact X ₁ and make contact X ₄ to the negative side of the DC control power supply, and connect one end _{of break contact X 3 and} make contact ₅ to track monitoring relay Y ₁
The make contact X 6 may be connected in series with the break contact Y ₁₁ of the intruder detection relay Y ₂ and the make contact X ₆ may be connected in series with the break contact Y ₂₁ of the intruder detection relay Y 2 .

The device for turning on and off the intruder detection contact 1A of the intruder detector 1 may be a mechanical device such as a micro switch, or may be a device using infrared ultrasound or the like.

As explained above, this invention consists of an intruder detection relay that is connected in series via a communication cable to form a closed loop during monitoring, an intruder detection contact, a selection switch, and a polarity conversion switch. By providing a relay, a track monitoring relay, a diode for shorting the track monitoring relay, a diode for shorting the intruder detection relay, and a diode for shorting the intruder detection contact, it is possible to prevent intruders when not being monitored. An alarm is not issued regardless of the detection contact, but an alarm is issued for abnormal conditions such as disconnection of the communication cable and removal of the intruder detector, so quick measures can be taken in response to abnormal conditions. The effect is that the intruder detection device can operate normally.

[Brief explanation of the drawing]

Figure 1 shows the prior art, Figures 2 and 3.
The figure shows an embodiment of this invention. 1...Intruder detector, 2...Receiver, 3...Communication cable, X...Polarity conversion relay, Y ₁ ...
Track monitoring relay, Y ₂ ...Intruder detection relay,
D ₁ , D ₂ , D ₃ ...diode, 43 ... selection switch, 8D ... power switch.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Connecting one end of two make contacts of a polarity conversion relay that is energized by turning on a selection switch for selecting monitoring/non-monitoring to the positive and negative sides of a DC control power source, respectively. At the same time, one ends of the two break contacts of the polarity conversion relay are connected to the positive and negative sides of the DC control power supply, respectively, and the make is connected to the positive and negative sides of the DC control power supply separately. Between the other end formed by connecting the other end of the contact and the other end of the break contact, a diode that short-circuits the line monitoring relay, which is energized only when not monitoring, during monitoring, and the line monitoring relay are connected in parallel. a parallel circuit of the intruder detection relay and a diode that shorts the intruder detection relay, which is energized only during monitoring, when not monitored; a diode that shorts the intruder detection contact during non-monitoring; and the intruder detection. A parallel circuit with a contact is connected in series via a connecting cable, and a series circuit with a contact of the polarity conversion relay and a break contact of the line monitoring relay is connected between the DC control power source and the polarity converting relay. An intruder detection device in which an alarm is connected in series with a parallel circuit of a series circuit of a contact of a conversion relay and a break contact of the intruder detection relay. 2. The contact of the polarity conversion relay connected in series with the break contact of the line monitoring relay is a break contact, and the contact of the polarity conversion relay connected in series with the break contact of the intruder detection relay. The intruder detection device according to claim 1, wherein is a make contact. 3. The contact of the polarity conversion relay connected in series with the break contact of the line monitoring relay is a make contact, and the contact of the polarity conversion relay connected in series with the break contact of the intruder detection relay. The intruder detection device according to claim 1, wherein is a break contact.