CN2694285Y - Lighting cable conductor anti-theft monitoring device in lighting monitoring system - Google Patents
Lighting cable conductor anti-theft monitoring device in lighting monitoring system Download PDFInfo
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- CN2694285Y CN2694285Y CN 200420020826 CN200420020826U CN2694285Y CN 2694285 Y CN2694285 Y CN 2694285Y CN 200420020826 CN200420020826 CN 200420020826 CN 200420020826 U CN200420020826 U CN 200420020826U CN 2694285 Y CN2694285 Y CN 2694285Y
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Abstract
The utility model discloses a lighting cable conductor anti-theft monitoring device in lighting monitoring system which comprises an impedance adjuster arranged at one end of the lighting cables and an anti-theft monitoring device arranged at the other end of the lighting cables; the impedance adjuster comprises an induction coil and a corresponding protection circuit; the input terminal of the resistance regulator is connected with one end of the lighting cables; the anti-theft monitoring device comprises an input balance circuit, an input protective circuit, a comparison and output driving circuit, and a light isolating output circuit; the input end of the input balance circuit is connected with the other end of the lighting cables; the output end of the input balance circuit is connected with the input end of the input protective circuit; the output end of the input protective circuit is connected with the input end of the comparison and output driving circuit; the output end of the comparison and output driving circuit is connected with the input end of the light isolating output circuit; the output end of the light isolating output circuit is connected with an alarming device. The lighting cable conductor anti-theft monitoring device can achieve the aim of detecting the circuit stolen through monitoring the change of the line impedance.
Description
Technical field
The utility model relates to the antitheft monitoring device of power for illumination cable in the illumination monitoring system that a kind of lawless person of preventing steals electric wire.
Background technology
Lighting control box and circuit are in the field, particularly in the combination area of city and country, steal phenomenon take place easily.When evening during bright lamp, illumination monitoring system can be by the differentiation to working current behind the bright lamp, can realize the burglar alarm of the illuminating line behind the bright lamp.Because bright lamp back lighting circuit is charged, general less generation cable is stolen phenomenon, therefore the illumination monitoring system monitoring that stealer often is chosen in morning or the back circuit of just having turned off the light is charged, not general is less than stealing illuminating line the opportunity of working current, and this will cause the heavy losses of street lamp facility.
Summary of the invention
The utility model is that existing illuminating line might be stolen and general illumination monitoring system is difficult for the problem of discovery in time again in order to solve, and a kind of antitheft monitoring device of power for illumination cable that is used for the illumination monitoring system of timely monitoring light circuit integrality that provides, this device utilizes that monitored illuminating power circuit length is constant, the loading of circuit institute is constant and the changeless principle of line impedance, whether stolen whether the impedance by Monitoring Line and cable terminating impedance regulator changes, and reach detection line purpose.
The technical measures that the utility model is taked are: the antitheft monitoring device of power for illumination cable in the illumination monitoring system, be characterized in, and comprise an antitheft monitoring device that is located at the impedance regulator of light conduits one end and is located at the light conduits other end;
Described impedance regulator is made of a telefault and corresponding protection circuit, and its input end is connected with an end of light conduits;
Described antitheft monitoring device comprises that an input balancing circuitry, an input protection circuit, a comparison and output driving circuit and a light are every output circuit; The input end of described input balancing circuitry is connected with the light conduits other end, and the output terminal of this input balancing circuitry is connected with the input end of input protection circuit; The output terminal of input protection circuit is connected with the input end of output driving circuit with comparison, relatively is connected with the input end of light every output circuit with the output terminal of output driving circuit, and light is connected with illumination monitoring terminal or warning device every the output terminal of output circuit.
The antitheft monitoring device of power for illumination cable in the above-mentioned illumination monitoring system, wherein, described comparison and output driving circuit are made of operational amplifier A R.
The antitheft monitoring device of power for illumination cable in the above-mentioned illumination monitoring system, wherein, described input balancing circuitry is a bridge balancing circuit, by constituting at the input end of operational amplifier A R high-low level and two pairs of balance brachium pontis that connect, wherein: a pair of brachium pontis is resistance R 4, R5, another is to branch road that brachium pontis is two resistance R 6, R7 serial connection in the brachium pontis, and the branch road that another brachium pontis is made up of resistance R 8, illuminating line impedance and impedance regulator constitutes.
The antitheft monitoring device of power for illumination cable in the above-mentioned illumination monitoring system, wherein, described input protection circuit is made of transient state diode V5 and fuse F1.
The antitheft monitoring device of power for illumination cable in the above-mentioned illumination monitoring system, wherein, described light is made of every coupling mechanism U1 light every output circuit.
The antitheft monitoring device of power for illumination cable in the above-mentioned illumination monitoring system, wherein, the described impedance regulator voltage dependent resistor (VDR) R1 and that is connected in parallel on inductance L 1 two ends by the inductance L 1, between live wire that is attempted by power for illumination cable one end and the zero line current-limiting resistance R2 that is serially connected in this end power for illumination cable live wire end forms; Described voltage dependent resistor (VDR) R1 and current-limiting resistance R2 form the holding circuit of inductance L 1.
The antitheft monitoring device of power for illumination cable in the above-mentioned illumination monitoring system wherein, also comprises an attention display, and described attention display is by constituting every the light emitting diode V6 that the output circuit input end connects at light.
Because the utility model has been taked above technical scheme, utilize that whole piece power circuit length is constant, line impedance immobilizes and install impedance regulator additional at line end presents the normal operation that high impedance does not influence lighting installation when alternating current is arranged, and when direct current, present the principle of low resistive state, when certain section electric wire is stolen, the impedance of circuit is changed, cause the change of loop voltage thus, make light every the coupling mechanism conducting or by, thereby realize the purpose that detection line is whether stolen.
Description of drawings
Concrete characteristic performance of the present utility model is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is that the utility model is applied in the connection diagram in the test line.
Fig. 2 is the circuit block diagram of the antitheft monitoring device of the utility model.
Fig. 3 is the circuit diagram of the utility model impedance regulator specific embodiment.
Fig. 4 is the circuit diagram of the specific embodiment of the antitheft monitoring device of the utility model.
Embodiment
See also Fig. 1.The antitheft monitoring device of power for illumination cable in the utility model illumination monitoring system comprises: the antitheft monitoring device 3 that is located at the impedance regulator 2 of light conduits 1 one ends and is located at the light conduits other end, and at the output terminal connection one illumination monitoring terminal or the local alarm 4 of antitheft monitoring device 3.
See also Fig. 2.Antitheft monitoring device 3 comprises that an input balancing circuitry 31, input protection circuit 32, a comparison and output driving circuit 33 and a light are every output circuit 34; The input end of described input balancing circuitry is connected with the light conduits other end, and the output terminal of this input balancing circuitry is connected with the input end of input protection circuit; The output terminal of input protection circuit is connected with the input end of output driving circuit with comparison, relatively is connected with the input end of light every output circuit with the output terminal of output driving circuit, and light is connected with illumination monitoring terminal or warning device every the output terminal of output circuit.
The antitheft monitoring device of this illuminating line can be understood the circuit situation by the physical parameter of monitoring light circuit, when taking place to steal cable, the impedance of circuit changes, and causes the change of loop voltage thus, and give alerting signal of illumination monitoring terminal, prompting the operator on duty in time handle.Also can connect a sonic alarm, send audible alarm, thereby guarantee the safety of illuminating line in this locality.
See also Fig. 3.Impedance regulator 2 of the present utility model is made of a telefault and corresponding protection circuit, and its input end is connected with an end of light conduits.In the present embodiment; the current-limiting resistance R2 that the voltage dependent resistor (VDR) R1 and that described impedance regulator is connected in parallel on inductance L 1 two ends by an inductance L 1, is serially connected in this end power for illumination cable live wire end forms, and wherein: voltage dependent resistor (VDR) R1 and current-limiting resistance R2 form the holding circuit of inductance L 1.When receiving high reject signal on the illuminating line when for example being struck by lightning, voltage dependent resistor (VDR) R2 short circuit has guaranteed the safety of telefault; Current-limiting resistance R2 has limited the short-circuit current that flows through voltage dependent resistor (VDR) R1 again, has guaranteed the safety of voltage dependent resistor (VDR).Telefault L1 has following feature: it is rendered as high impedance status during alternating current, and it is a low impedance state during direct current.Therefore when having alternating current to pass through on the cable, telefault L1 is a high impedance status, does not influence the operation of illuminator; When not having alternating current on the cable, telefault L1 is connected with the antitheft monitoring device 3 of the utility model monitoring device by cable, so it is the used direct current of antitheft monitoring device 3 that telefault L1 goes up what pass through, this moment, telefault L1 was rendered as low impedance state, at this moment, if someone steals cable, total line impedance will change, and makes the brachium pontis impedance unbalance of input balancing circuitry.
See also Fig. 4, this is a kind of embodiment circuit diagram of the antitheft monitoring device 3 of the utility model.The comparison and the output driving circuit 33 of the antitheft monitoring device of power for illumination cable in the utility model illumination monitoring system mainly are made of operational amplifier A R.Input balancing circuitry 31 is bridge balancing circuits, by constituting at the input end of operational amplifier A R high-low level and two pairs of balance brachium pontis that connect, wherein: a pair of brachium pontis is resistance R 4, R5, another is to branch road that brachium pontis is two resistance R 6, R7 serial connection in the brachium pontis, the branch road that another brachium pontis is made up of resistance R 8, illuminating line impedance and impedance regulator constitutes, stolen when illuminating line, illuminating line is opened a way; Resistance R 8 terminal impedances are changed, cause the voltage of comparer AR input end to change, compare and the output driving circuit upset.Input protection circuit 32 is made of transient state diode V5 and fuse F1, and when illuminating line produced the strong jamming impact signal, this circuit can guarantee the safety of this antitheft monitoring device.Light is made of every coupling mechanism U1 light every output circuit, is connected the output terminal of comparison and output driving circuit, and anti-theft warning circuit and monitoring or warning circuit are separated, and guarantees the safety of monitoring or warning circuit.This circuit can adopt the low-voltage DC power supply, and present embodiment adopts the 12V direct current as power supply.
The antitheft monitoring device of power for illumination cable in the utility model illumination monitoring system also comprises an attention display, and described attention display is by constituting every the light emitting diode V6 that the output circuit input end connects at light.
Principle of work of the present utility model is: from illuminating line, after power circuit and lighting install, on-the-spot power circuit length and added lighting are constant, therefore can think that the impedance of circuit is also to answer substantially constant, and impedance are bigger.In the utility model, installed impedance regulator additional at the end of circuit, this impedance regulator is made up of a telefault and corresponding protection circuit, and it is rendered as high impedance status when alternating current; It is a low impedance state when being the direct current situation.After line outage, the circuit that this anti-theft device is installed is stolen, and illuminating line disconnects, and impedance regulator and alarm disconnect, and the impedance that causes importing balancing circuitry changes, and destroys the balance of original input end; Comparer is overturn, cause U1 light to become conducting every coupling mechanism by ending, light is exported to follow-up monitor terminal or warning device every coupling mechanism, produces alerting signal, thereby realizes stealing the monitoring of line.
Claims (7)
1, the antitheft monitoring device of power for illumination cable in the illumination monitoring system is characterized in that, comprises an antitheft monitoring device that is located at the impedance regulator of power for illumination cable one end and is located at the power for illumination cable other end;
Described impedance regulator is made of a telefault and corresponding protection circuit, and its input end is connected with an end of light conduits;
Described antitheft monitoring device comprises that an input balancing circuitry, an input protection circuit, a comparison and output driving circuit and a light are every output circuit; The input end of described input balancing circuitry is connected with the light conduits other end, and the output terminal of this input balancing circuitry is connected with the input end of input protection circuit; The output terminal of input protection circuit is connected with the input end of output driving circuit with comparison, relatively is connected with the input end of light every output circuit with the output terminal of output driving circuit, and light is connected with monitor terminal or warning device every the output terminal of output circuit.
2, the antitheft monitoring device of power for illumination cable in the illumination monitoring system according to claim 1 is characterized in that described comparison and output driving circuit are made of operational amplifier A R.
3, the antitheft monitoring device of power for illumination cable in the illumination monitoring system according to claim 1, it is characterized in that, described input balancing circuitry is a bridge balancing circuit, by constituting at the input end of operational amplifier A R high-low level and two pairs of balance brachium pontis that connect, wherein: a pair of brachium pontis is resistance R 4, R5, another is to branch road that brachium pontis is two resistance R 6, R7 serial connection in the brachium pontis, and the branch road that another brachium pontis is made up of resistance R 8, illuminating line impedance and impedance regulator constitutes.
4, the antitheft monitoring device of power for illumination cable in the illumination monitoring system according to claim 1 is characterized in that, described input protection circuit is made of transient state diode V5 and fuse F1.
5, the antitheft monitoring device of power for illumination cable in the illumination monitoring system according to claim 1 is characterized in that described light is made of every coupling mechanism U1 light every output circuit.
6, the antitheft monitoring device of power for illumination cable in the illumination monitoring system according to claim 1, it is characterized in that the current-limiting resistance R2 that the voltage dependent resistor (VDR) R1 and that described impedance regulator is connected in parallel on inductance L 1 two ends by the inductance L 1, between live wire that is attempted by power for illumination cable one end and the zero line is serially connected in this end power for illumination cable live wire end forms; Described voltage dependent resistor (VDR) R1 and current-limiting resistance R2 form the holding circuit of inductance L 1.
7, the antitheft monitoring device of power for illumination cable in the illumination monitoring system according to claim 1 is characterized in that, also comprises an attention display, and described attention display is by constituting every the light emitting diode V6 that the output circuit input end connects at light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420020826 CN2694285Y (en) | 2004-03-03 | 2004-03-03 | Lighting cable conductor anti-theft monitoring device in lighting monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420020826 CN2694285Y (en) | 2004-03-03 | 2004-03-03 | Lighting cable conductor anti-theft monitoring device in lighting monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2694285Y true CN2694285Y (en) | 2005-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420020826 Expired - Fee Related CN2694285Y (en) | 2004-03-03 | 2004-03-03 | Lighting cable conductor anti-theft monitoring device in lighting monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2694285Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118214A (en) * | 2015-09-22 | 2015-12-02 | 浙江方大智控科技有限公司 | Cable antitheft system and corresponding cable antitheft method |
-
2004
- 2004-03-03 CN CN 200420020826 patent/CN2694285Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118214A (en) * | 2015-09-22 | 2015-12-02 | 浙江方大智控科技有限公司 | Cable antitheft system and corresponding cable antitheft method |
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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: 20050420 Termination date: 20110303 |