CN201374535Y - Communication cable burglar alarm - Google Patents
Communication cable burglar alarm Download PDFInfo
- Publication number
- CN201374535Y CN201374535Y CN200920089011U CN200920089011U CN201374535Y CN 201374535 Y CN201374535 Y CN 201374535Y CN 200920089011 U CN200920089011 U CN 200920089011U CN 200920089011 U CN200920089011 U CN 200920089011U CN 201374535 Y CN201374535 Y CN 201374535Y
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- CN
- China
- Prior art keywords
- circuit
- communication cable
- alarm
- dialer
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000004891 communication Methods 0.000 title claims abstract description 15
- 238000012544 monitoring process Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to a communication cable burglar alarm which comprises at least one way of alarm circuit; and each way of alarm circuit comprises a monitoring circuit and a dialer; the monitoring circuit comprises a rectifying circuit, wherein a pair of input terminals of the rectifying circuit is used for being connected with a pair of terminals of a space source power line pair loop in a communication cable, and a circuit formed by the series connection of a current limiting device and an electromagnetic coil of a relay is connected between the positive electrode and the negative electrode of an output terminal of the rectifying circuit; a normally-closed contact of the relay is accessed to a trigger terminal of the dialer; and a number source terminal of the dialer is used for being accessed to a number source line of a stored program control (SPC) exchange. The communication cable burglar alarm is mainly used for solving the problems that the existing cable burglar alarm can not identify the short circuit caused by fire burning and the burglar alarm is out of operation due to the fault of a power supply.
Description
Technical field
The utility model relates to a kind of communication cable alarm, belongs to anti-theft device.
Background technology
The existing cable alarm is as power supply by alternating current 220V or direct current 48V, be used for alerting call by a number source, multipotency is monitored 8 or 16 cables simultaneously, get a pair of cable generally speaking from monitored cable, their termination is gone into alarm, and other end short circuit together, main adopt earthed circuit, loop resistance to open a way to discern cable stolen, promptly this loop resitance to cable is made a decision, when resistance is worth greater than certain, promptly think cable open circuit; When occur burning short circuit, but can not discern, if the power supply fault of alarm then alarm with regard to complete failure, are given robber's opportunity, cause heavy losses easily.
The utility model content
The purpose of this utility model provides a kind of alarm that can discern the communication cable of short circuit, with solving existing cable theft-prevention device to burning the problem that short circuit nonrecognition and power supply fault alarm lost efficacy.
For achieving the above object, the utility model adopts following technical scheme: a kind of communication cable alarm, this alarm comprises at least one road warning circuit, each road warning circuit comprises a supervisory circuit and a dialer, described supervisory circuit comprises a rectification circuit, the a pair of input of this rectification circuit is used for connecting a pair of end of a spacing source current of communication cable circuit to the loop, be connected to a circuit that constitutes by the solenoid series connection of a current limiting device and a relay between the both positive and negative polarity of its output, a normally closed interlock access dial device trigger end of described relay, number source end of dialer is used to insert a number source circuit of stored-program control exchange.
Also be provided with a failure indicating circuit in described each road warning circuit, this failure indicating circuit comprises another rectification circuit, be connected to a circuit that is made of another normally closed interlock series connection of an indicator light, a current-limiting resistance and above-mentioned relay between the both positive and negative polarity of this rectification circuit output end, number source end of the input of this rectification circuit and dialer connects together.
Described current limiting device is resistance or indicator light or is made of resistance and indicator light parallel connection.
The beneficial effects of the utility model are: the power supply of every warning circuit of this telecommunication cable alarm all is with another circuit to be connected in series the back by another spacing source to the circuit access switch at far-end by a pair of circuit in the cable of this circuit supervision, directly power by switch, each bar warning circuit works alone, and is independent of each other; When certain root cable occurs burning short circuit, opens circuit to be cut and steal or during swinging cross, the warning circuit dead electricity on this road, normally closed relay in the warning circuit returns to normal, the dialer trigger end is connected, alarm is sent in the dialer dialing, utilize the rectifier bridge power supply as power supply, make input have the function of anti-power supply reversal connection, made things convenient for on-the-spot construction.
Description of drawings
Fig. 1 is a use winding diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
In conjunction with Fig. 1, Fig. 2 specifies the utility model, a kind of communication cable alarm, it comprises No. one warning circuit, described warning circuit comprises a supervisory circuit, a dialer and a failure indicating circuit, described supervisory circuit comprises a rectifier bridge DB107, connect a circuit that constitutes by the solenoid series connection of indicator light L1 and relay J between the both positive and negative polarity of the output of this rectifier bridge DB107, the two ends of described indicator light L1 resistance R 1 in parallel, a normally closed interlock access dial device trigger end of described relay J, number source end of dialer and the input of described failure indicating circuit connect together, described failure indicating circuit comprises another rectifier bridge DB107, connect one by indicator light L2 between the both positive and negative polarity of the output of this rectifier bridge DB107, the circuit that another normally closed interlock series connection of current-limiting resistance R2 and above-mentioned relay J constitutes, wherein a pair of input of supervisory circuit is used to connect a pair of terminal a2 of spacing source current circuit to the loop, b2, a number source circuit c of number source termination stored-program control exchange of dialer, d.
The using method and the operation principle of this alarm are: at first selecting two pairs of lines to be connected on terminal a1, b1 and a2, the b2 of cross-connecting box respectively in monitored cable, far-end these two pairs of lines are connected in series respectively, in machine room, this that is connected on terminal a1, b1 connect a spacing source of switch to line then, this connects the input of alarm, number source circuit c, a d of number source terminate switched machine of dialer in the alarm to line connecting terminal a2, b2; Its operation principle is: when communication cable is disconnected, short circuit is cut steals or swinging cross when connecting, the solenoid dead electricity of supervisory circuit repeat circuit, its normally closed switch restPoses, dialer is connected and is begun the dialing alarm, searching spacing source circuit as people's line inspection cuts preventing reporting to the police when stealing, the supply current of the electromagnetic coil relay of supervisory circuit in the alarm is reduced, the contact of relay also can closedly be connected dialer, send alarm, play the effect of anti-free call on somebody else's expense through illegal means, regulate the size of the resistance R 1 in the supervisory circuit simultaneously, can also regulate the distance of alarm telecommunication cable control.
Claims (3)
1, a kind of communication cable alarm, it is characterized in that: this alarm comprises at least one road warning circuit, each road warning circuit comprises a supervisory circuit and a dialer, described supervisory circuit comprises a rectification circuit, the a pair of input of this rectification circuit is used for connecting a pair of end of a spacing source current of communication cable circuit to the loop, be connected to a circuit that constitutes by the solenoid series connection of a current limiting device and a relay between the both positive and negative polarity of its output, a normally closed interlock access dial device trigger end of described relay, number source end of dialer is used to insert a number source circuit of stored-program control exchange.
2, communication cable alarm according to claim 1, it is characterized in that: also be provided with a failure indicating circuit in described each road warning circuit, this failure indicating circuit comprises another rectification circuit, be connected to a circuit that is made of another normally closed interlock series connection of an indicator light, a current-limiting resistance and above-mentioned relay between the both positive and negative polarity of this rectification circuit output end, number source end of the input of this rectification circuit and dialer connects together.
3, communication cable alarm according to claim 1 and 2 is characterized in that: described current limiting device is resistance or indicator light or is made of resistance and indicator light parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920089011U CN201374535Y (en) | 2009-03-12 | 2009-03-12 | Communication cable burglar alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920089011U CN201374535Y (en) | 2009-03-12 | 2009-03-12 | Communication cable burglar alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201374535Y true CN201374535Y (en) | 2009-12-30 |
Family
ID=41500616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920089011U Expired - Fee Related CN201374535Y (en) | 2009-03-12 | 2009-03-12 | Communication cable burglar alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201374535Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI651691B (en) * | 2017-11-07 | 2019-02-21 | 台灣高速鐵路股份有限公司 | A rail cable theft system |
-
2009
- 2009-03-12 CN CN200920089011U patent/CN201374535Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI651691B (en) * | 2017-11-07 | 2019-02-21 | 台灣高速鐵路股份有限公司 | A rail cable theft system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20120312 |