CN104700527A - Cable anti-theft device and method thereof - Google Patents
Cable anti-theft device and method thereof Download PDFInfo
- Publication number
- CN104700527A CN104700527A CN201410428642.1A CN201410428642A CN104700527A CN 104700527 A CN104700527 A CN 104700527A CN 201410428642 A CN201410428642 A CN 201410428642A CN 104700527 A CN104700527 A CN 104700527A
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- CN
- China
- Prior art keywords
- cable
- control center
- detection unit
- resistance
- alarm
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- 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.)
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
Abstract
The invention relates to a cable anti-theft device and a method thereof and belongs to the field of cable theft prevention. A cable comprises a cable core, a protective layer located outside the cable core and a sheath layer covering the protective layer. The device comprises an alarm unit, a control center, a line breakage detection unit and a ranging unit; the control center outputs a signal to the alarm unit and the ranging unit; the input end of the line breakage detection unit is connected with the ranging unit; the output end of the line breakage detection unit is connected with the control center. The line breakage detection unit detects trace current in a circuit under detection, through volt-ampere characteristics of a triode and through the control center, thereby judging line breakage of a transmission line; once line breakage occurs, a ranging alarm is given out fast, and thus, economic loss is reduced and mistaken alarming of the existing detection circuit is avoided; the circuit is simple, and the problem that the prior cable anti-theft device is high in false alarm rate is solved.
Description
Technical field
The present invention relates to field of cables, be related specifically to cable theft-prevention field.
Background technology
Power cable safeguard protection is the problem that power department will solve always, existing cable anti-theft alarm circuit all adopts installs at power cable end the remote detection terminal that has voltage detecting and power line carrier, PLC function, so circuit is very complicated so components and parts are many, cost is high, reliability is low, also because wireless system is by terrain environment (mountain area or remote districts) impact, be difficult to large scale application, and for the burglar alarm of street lamp and transformer side power cable, rate of false alarm is higher, low cost reliable anti-theft device demand is very large.
Summary of the invention
In order to overcome the problem that in prior art, burglar alarm for cable rate of false alarm is higher, the invention provides a kind of cable anti-theft device and method thereof.
Technical scheme of the present invention is: a kind of burglar alarm for cable; the restrictive coating that cable comprises cable core, is positioned at the protective seam outside cable core and is wrapped in outside protective seam; this device comprises alarm unit, control center, burn out detection unit and range cells; control center outputs signal to alarm unit and range cells; the input end of burn out detection unit connects range cells, the output terminal connection control center of burn out detection unit.
Described range cells comprise a power supply, No. two power supplys, two be positioned at the signal wire of cable, plural diode and the equal-sized resistance of resistance, a power supply and No. two reversal of power are connected in parallel between two signal wires, a positive source is connected in series a K switch, No. two whole diodes of power sources in parallel, No. two positive sources and diode cathode reverse, each Diode series resistance, at the terminal of a signal wire resistance in parallel, the output terminal of range cells is the point of crossing B of No. two power circuits.
Described control center is by K switch connection control power supply.
Diode in described range cells all in the same way and equidistant placement.
Described burn out detection unit comprises triode Q, resistance and diode, the base stage of triode Q connects the output terminal of range cells through resistance, diode, the emitter of Q connects public terminal GND, and collector connects power Vcc through resistance, and draws the output terminal of burn out detection unit through collector.
Described control center comprises display, display alarm information.
A method for described burglar alarm for cable, the steps include:
Step one, circuit UNICOM;
Step 2, signal judge through open circuit;
Step 3, judged result send control end back to;
Step 4, control end measure accident point.
The present invention has following good effect: the burn out detection unit that this device adopts, utilize the volt-ampere characteristic of triode and in conjunction with control center to detect the Weak current in circuit-under-test, to judge the broken string situation of transmission line, the mistake alarm of existing testing circuit can be avoided, and circuit is very simple, once occur that broken string situation can also be found range rapidly warning, to reduce economic loss.This apparatus structure is simple, easy to use, does not need manually to check, has saved labour, and can carry out test and monitoring constantly, eliminate check frequency, improve security of system.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of the specific embodiment of the invention;
Fig. 2 be specific embodiment of the invention burn out detection unit working circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, this embodiment is described.
As shown in Figure 1; a kind of burglar alarm for cable; the restrictive coating that cable comprises cable core, is positioned at the protective seam outside cable core and is wrapped in outside protective seam; this device comprises alarm unit, control center, burn out detection unit and range cells; control center outputs signal to alarm unit; the input end of burn out detection unit connects range cells, the output terminal connection control center of burn out detection unit.In addition, control center comprises display, when range cells breaks down, can display alarm cue over the display, and display can be LCDs.
The method of this burglar alarm for cable is:
Step one, circuit UNICOM;
Step 2, signal judge through open circuit;
Step 3, judged result send control end back to;
Step 4, control end measure accident point.Apparatus and method provided by the invention ensure that low cost and the reliability of cable theft-prevention.
As shown in Figure 2, range cells comprises a power supply V1, No. two power supply V2, two signal wires, plural diode and the equal-sized resistance of resistance.Signal wire is arranged in the protective seam outside cable core; a power supply V1 and No. two power supply V2 is connected in reverse parallel between two signal wire ends; a power supply V1 positive pole is connected in series a K switch; K switch is in off-state; one end of switch is the input end A of range cells, and control center connects range cells by K switch.No. two power supply V2 all diodes in parallel, and diode is all in the same way and equidistant placement.Oppositely, each Diode series resistance, at the terminal of a signal wire resistance in parallel, the output terminal of range cells is the point of crossing B of No. two power supply V2 circuits, and output terminal connects burn out detection unit for the positive pole of No. two power supply V2 and diode cathode.When circuit is normal, only have No. two power supply V2 in running order, diode branch not conducting, No. two power supply V2 and terminal resistance R form loop.When open circuit conditions appears in circuit, No. two power supply V2 place Circuit Interrupt, burn out detection unit will send a signal to control center, and range cells is made up of general resistance and diode, and cost is low, easy to use.
As shown in Figure 2, burn out detection unit comprises triode Q, resistance and diode, the base stage of triode Q is through resistance R1, the output terminal B of range cells is connected after diode D, and connect public terminal GND through resistance R2, and diode D negative electrode be connected electric capacity C between public terminal GND, emitter connects public terminal GND, collector connects power supply VCC through resistance R3, and the output terminal of burn out detection unit is drawn at collector, thus the signal of burn out detection unit output terminal is with the sampled signal change on the output terminal B of range cells, the output terminal of burn out detection unit is connected to control center.This device only needs the loading section of range cells to be placed in the protective seam outside cable core, and remainder is all arranged in pulpit, observes testing circuit all convenient.
During cable work, signal wire is also in running order, during path, No. two power supply V2 of range cells work, and current signal exports to burn out detection unit simultaneously, and triode is in magnifying state, the output end current of burn out detection unit is exaggerated, output to control center, control center, according to Comparative result, can draw the normal conclusion of cable.Cable is stolen, during signal wire open circuit, triode is in cut-off duty, the output end current of burn out detection unit is almost nil, after control center contrasts the signal received, just can show that electric discontinuity of cable breaks down likely stolen conclusion, control center sends alerting signal to alarm unit, simultaneously display display alarm information.Control center can send a signal to K switch simultaneously, K switch closes, a power supply V1 is that remaining range cells continues powered operation, now, also in the loop, control center, by measuring circuit all-in resistance size, can calculate the resistance number in loop for diode and corresponding resistance in series, again because resistance is equidistant arrangement, so control center can calculate rapidly the distance of accident point to control center.So that the timely accident settlement of staff, this device does not need manually to check, has saved labour, and can carry out test and monitoring constantly, eliminates check frequency, improves security of system.
Claims (7)
1. a burglar alarm for cable; the restrictive coating that cable comprises cable core, is positioned at the protective seam outside cable core and is wrapped in outside protective seam; it is characterized in that: this device comprises alarm unit, control center, burn out detection unit and range cells; control center outputs signal to alarm unit and range cells; the input end of burn out detection unit connects range cells, the output terminal connection control center of burn out detection unit.
2. burglar alarm for cable according to claim 1, it is characterized in that: described range cells comprises a power supply, No. two power supplys, two signal wires being positioned at cable, plural diode and the equal-sized resistance of resistance, a power supply and No. two reversal of power are connected in parallel between two signal wires, a positive source is connected in series a K switch, No. two whole diodes of power sources in parallel, No. two positive sources and diode cathode reverse, each Diode series resistance, at the terminal of a signal wire resistance in parallel, the output terminal of range cells is the point of crossing B of No. two power circuits.
3. burglar alarm for cable according to claim 2, is characterized in that: described control center is by K switch connection control power supply.
4. burglar alarm for cable according to claim 2, is characterized in that: the diode in described range cells all in the same way and equidistant placement.
5. burglar alarm for cable according to claim 1, it is characterized in that: described burn out detection unit comprises triode Q, resistance and diode, the base stage of triode Q connects the output terminal of range cells through resistance, diode, the emitter of Q connects public terminal GND, collector connects power Vcc through resistance, and draws the output terminal of burn out detection unit through collector.
6. burglar alarm for cable according to claim 1, is characterized in that: described control center comprises display, display alarm information.
7., according to the method for the burglar alarm for cable of claim 1-6 described in any one, the steps include:
Step one, circuit UNICOM;
Step 2, signal judge through open circuit;
Step 3, judged result send control end back to;
Step 4, control end measure accident point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410428642.1A CN104700527B (en) | 2014-08-28 | 2014-08-28 | Cable anti-theft device and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410428642.1A CN104700527B (en) | 2014-08-28 | 2014-08-28 | Cable anti-theft device and its method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104700527A true CN104700527A (en) | 2015-06-10 |
| CN104700527B CN104700527B (en) | 2017-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410428642.1A Expired - Fee Related CN104700527B (en) | 2014-08-28 | 2014-08-28 | Cable anti-theft device and its method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104700527B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119216A (en) * | 2015-08-26 | 2015-12-02 | 芜湖市凯鑫避雷器有限责任公司 | High voltage wall bushing having crack monitoring device |
| CN105186417A (en) * | 2015-08-26 | 2015-12-23 | 芜湖市凯鑫避雷器有限责任公司 | High-voltage wall bushing with double-layer crack monitoring device |
| CN107545709A (en) * | 2016-06-29 | 2018-01-05 | 上海宝钢化工有限公司 | A kind of more spelling cable break alarm devices |
| CN107861021A (en) * | 2017-09-21 | 2018-03-30 | 天津市电力科技发展有限公司 | Cable theft-prevention positioner and method based on traveling wave characteristic |
| CN109921515A (en) * | 2019-03-12 | 2019-06-21 | 上海荷福人工智能科技（集团）有限公司 | A kind of overall power distribution management system |
| CN111080988A (en) * | 2019-12-24 | 2020-04-28 | 天地伟业技术有限公司 | Alarm input circuit capable of detecting loop and detection method |
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2014
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| CN200997158Y (en) * | 2007-01-15 | 2007-12-26 | 张立 | Front-movable inducting band for buried pipeline safety alarm |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119216A (en) * | 2015-08-26 | 2015-12-02 | 芜湖市凯鑫避雷器有限责任公司 | High voltage wall bushing having crack monitoring device |
| CN105186417A (en) * | 2015-08-26 | 2015-12-23 | 芜湖市凯鑫避雷器有限责任公司 | High-voltage wall bushing with double-layer crack monitoring device |
| CN107545709A (en) * | 2016-06-29 | 2018-01-05 | 上海宝钢化工有限公司 | A kind of more spelling cable break alarm devices |
| CN107861021A (en) * | 2017-09-21 | 2018-03-30 | 天津市电力科技发展有限公司 | Cable theft-prevention positioner and method based on traveling wave characteristic |
| CN109921515A (en) * | 2019-03-12 | 2019-06-21 | 上海荷福人工智能科技（集团）有限公司 | A kind of overall power distribution management system |
| CN111080988A (en) * | 2019-12-24 | 2020-04-28 | 天地伟业技术有限公司 | Alarm input circuit capable of detecting loop and detection method |
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| CN104700527B (en) | 2017-09-29 |
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xin Jianfang Inventor after: Li Shujing Inventor after: Zhu Zhilong Inventor after: Zhang Fang Inventor after: Liang Guangjun Inventor after: Li Linguo Inventor before: Liang Guangjun |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170929 Termination date: 20190828 |