CN204029084U - Cable anti-theft device - Google Patents
Cable anti-theft device Download PDFInfo
- Publication number
- CN204029084U CN204029084U CN201420488741.4U CN201420488741U CN204029084U CN 204029084 U CN204029084 U CN 204029084U CN 201420488741 U CN201420488741 U CN 201420488741U CN 204029084 U CN204029084 U CN 204029084U
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- CN
- China
- Prior art keywords
- cable
- control center
- detection unit
- out detection
- burn out
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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.)
- Expired - Fee Related
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Abstract
The utility model relates to a kind of cable anti-theft device, belongs to cable theft-prevention field.This cable anti-theft alarm device; cable comprises cable core, is positioned at the protective seam outside cable core and is wrapped in the restrictive coating 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, and the output terminal of burn out detection unit connects control center.The burn out detection unit that this device adopts, utilize the volt-ampere characteristic of triode and detect the Weak current in circuit-under-test in conjunction with control center, broken string situation with judgement transmission line, once there is the range finding warning rapidly of broken string situation, to reduce economic loss, avoid false alarm and the circuit of existing testing circuit very simple, solved the higher problem of cable anti-theft alarm device rate of false alarm in prior art.
Description
Technical field
The utility model relates to field of cables, specially refers 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 at power cable end a remote detection terminal with voltage detecting and power line carrier, PLC function is installed, so so the very complicated components and parts of circuit are many, cost is high, reliability is low, also because wireless system is subject to 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, it is low-cost that anti-theft device demand is very large reliably.
Utility model content
In order to overcome the higher problem of cable anti-theft alarm device rate of false alarm in prior art, the utility model provides a kind of cable anti-theft device.
The technical solution of the utility model is: a kind of cable anti-theft alarm device; cable comprises cable core, is positioned at the protective seam outside cable core and is wrapped in the restrictive coating 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, and the output terminal of burn out detection unit connects control center.
Described range cells comprises that power supply, No. two power supplys, two are 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 K switch of a positive source serial connection, No. two power supply all diodes in parallel, No. two positive sources and diode cathode are reverse, a resistance of each diode series connection, at a terminal resistance in parallel of signal wire, the output terminal of range cells is the point of crossing B of No. two power circuits.
Described control center is connected and is controlled a power supply by K switch.
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 through collector, draws the output terminal of burn out detection unit.
Described control center comprises display, display alarm information.
A method for described cable anti-theft alarm device, the steps include:
Step 1, circuit UNICOM;
Step 2, signal are through opening circuit judgement;
Step 3, judged result are sent control end back to;
Step 4, control end are measured accident point.
The utility model has following good effect: the burn out detection unit that this device adopts, utilize the volt-ampere characteristic of triode and detect the Weak current in circuit-under-test in conjunction with control center, broken string situation with judgement transmission line, can avoid the mistake alarm of existing testing circuit, and circuit is very simple, once there is the range finding warning rapidly of broken string situation, to reduce economic loss.This apparatus structure is simple, easy to use, does not need manually to check, has saved labour, and can detect constantly monitoring, has eliminated detection blind area, has improved security of system.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of the utility model embodiment;
Fig. 2 be the utility model embodiment 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 cable anti-theft alarm device; cable comprises cable core, is positioned at the protective seam outside cable core and is wrapped in the restrictive coating 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, and the output terminal of burn out detection unit connects control center.In addition, control center comprises display, when range cells breaks down, can display alarm cue on display, and display can be LCDs.
The method of this cable anti-theft alarm device is:
Step 1, circuit UNICOM;
Step 2, signal are through opening circuit judgement;
Step 3, judged result are sent control end back to;
Step 4, control end are measured accident point.The apparatus and method that the utility model provides have guaranteed low cost and the reliability of cable theft-prevention.
As shown in Figure 2, range cells comprises 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 are connected in reverse parallel between two signal wire ends; a K switch of an anodal serial connection of power supply V1; 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.Positive pole and the diode cathode of No. two power supply V2 are reverse, a resistance of each diode series connection, and at a terminal resistance in parallel of signal wire, the output terminal of range cells is the point of crossing B of No. two power supply V2 circuits, output terminal connects burn out detection unit.When circuit is normal, only have No. two power supply V2 in running order, not conducting of diode branch, 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 interrupts, and burn out detection unit will send a signal to control center, and range cells is comprised 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 R 1, the output terminal B that connects range cells after diode D, and connect public terminal GND through resistance R 2, and be connected capacitor C between diode D negative electrode and public terminal GND, emitter connects public terminal GND, collector connects power supply VCC through resistance R 3, and at collector, draw the output terminal of burn out detection unit, thereby the signal of burn out detection unit output terminal changes with the sampled signal on the output terminal B of range cells, the output terminal of burn out detection unit is connected to control center.This device only need to be placed in the loading section of range cells 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 work of range cells, current signal is exported 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 contrasts according to result, can draw the normal conclusion of cable.Cable is stolen, when signal wire opens 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 of receiving, just can draw the electric discontinuity of cable likely stolen conclusion that breaks down, 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 is closed, a power supply V1 is that remaining range cells continues powered operation, now, diode and corresponding resistance in series are also in loop, and control center, by measuring circuit all-in resistance size, can calculate the resistance number in loop, again because resistance is equidistant arrangement, so control center can calculate rapidly accident point to the distance of control center.So that staff's processing accident in time, this device does not need manually to check, has saved labour, and can detect constantly monitoring, has eliminated detection blind area, has improved security of system.
Claims (6)
1. a cable anti-theft alarm device; cable comprises cable core, is positioned at the protective seam outside cable core and is wrapped in the restrictive coating 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, and the output terminal of burn out detection unit connects control center.
2. cable anti-theft alarm device according to claim 1, it is characterized in that: described range cells comprises power supply No. one, No. two power supplys, two signal wires that are positioned at cable, the equal-sized resistance of plural diode and resistance, a power supply and No. two reversal of power are connected in parallel between two signal wires, a K switch of a positive source serial connection, No. two power supply all diodes in parallel, No. two positive sources and diode cathode are reverse, a resistance of each diode series connection, a terminal resistance in parallel at signal wire, the output terminal of range cells is the point of crossing B of No. two power circuits.
3. cable anti-theft alarm device according to claim 2, is characterized in that: described control center is connected and controlled a power supply by K switch.
4. cable anti-theft alarm device according to claim 2, is characterized in that: the diode in described range cells all in the same way and equidistant placement.
5. cable anti-theft alarm device 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 through collector, draws the output terminal of burn out detection unit.
6. cable anti-theft alarm device according to claim 1, is characterized in that: described control center comprises display, display alarm information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488741.4U CN204029084U (en) | 2014-08-28 | 2014-08-28 | Cable anti-theft device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488741.4U CN204029084U (en) | 2014-08-28 | 2014-08-28 | Cable anti-theft device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204029084U true CN204029084U (en) | 2014-12-17 |
Family
ID=52068920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420488741.4U Expired - Fee Related CN204029084U (en) | 2014-08-28 | 2014-08-28 | Cable anti-theft device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204029084U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104700527A (en) * | 2014-08-28 | 2015-06-10 | 安徽工程大学 | Cable anti-theft device and method thereof |
| CN108230591A (en) * | 2016-12-10 | 2018-06-29 | 赵芳 | The anti-lost detection method of low-power consumption that a kind of signal lines disconnection is alarmed immediately |
-
2014
- 2014-08-28 CN CN201420488741.4U patent/CN204029084U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104700527A (en) * | 2014-08-28 | 2015-06-10 | 安徽工程大学 | Cable anti-theft device and method thereof |
| CN108230591A (en) * | 2016-12-10 | 2018-06-29 | 赵芳 | The anti-lost detection method of low-power consumption that a kind of signal lines disconnection is alarmed immediately |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20150828 |
|
| EXPY | Termination of patent right or utility model |