CN204229563U - High frequency capacitive reactance formula cable wireless theft-proof alarm - Google Patents
High frequency capacitive reactance formula cable wireless theft-proof alarm Download PDFInfo
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- CN204229563U CN204229563U CN201420716906.9U CN201420716906U CN204229563U CN 204229563 U CN204229563 U CN 204229563U CN 201420716906 U CN201420716906 U CN 201420716906U CN 204229563 U CN204229563 U CN 204229563U
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Abstract
The utility model discloses a kind of high frequency capacitive reactance formula cable wireless theft-proof alarm, tunable high-frequency signal generator produces high-frequency signal, this signal is adjustable, mainly according to the distributed capacitance of tested cable and the frequency of impedance conditions decision tunable high-frequency signal generator, this electrical signal of the frequency is transported to high-frequency output circuit and amplifies, after amplification, this electrical signal of the frequency is sent into capacitive reactance testing circuit and is carried out capacitive reactance detection after sealing in detected cable, after cable is cut-off, the total capacitance of cable changes, because high frequency electrical signal is connected in series on cable, the capacitive reactance that cable feeds back in capacitive reactance testing circuit changes, after this change is tested, capacitive reactance testing circuit exports a voltage U v trigger alarm circuit, trigger alarm circuit sends warning, radio is launched through internal wireless module, reach the object of informing, achieve the function that high frequency capacitive reactance formula cable wireless theft-proof alarm is reported to the police.The utility model has the advantage that structure is simple, be convenient to miniaturization, easy-to-operate.
Description
Technical field
The present invention relates to a kind of anti-theft alarm for cable, imperial its relates to a kind of high frequency capacitive reactance formula cable wireless theft-proof alarm.Have structure simple, be convenient to small-sized and integrated, no electrolytic capacitor, resistance to certain high temperature, long service life, economize energy advantage.
Background technology
The stolen incidence of cases of current power cable is more and more higher, all a large amount of cable can be used in power construction and real estate development process, before cable is not energized, occur that stolen probability is higher, cause economic loss large, at present the normal method adopted has laid cable in time very short before energising, prevent stolen, this cabling that starts before energising just causes cable duration anxiety or delays the duration, in addition cable laying good after also will through a series of test and inspection, safety guarantee is in the meantime maked an inspection tour by personnel, some enterprise is at production anti-theft alarm for electric power cable now, but what mostly adopt is all the method for resistance detection, this detection method has a lot of weak point, one be detected cable needs is closed loop, so just need all to connect together at the other end of cable, but cable is that requirement just to be received in cabinet on switch at once after electric-examination and withstand voltage test, so just cause and connect and do not allow, the other end also having partial high pressure cable receives in the switching station of electric company, also join operation is just caused not allow, therefore the present invention adopts the mode of high frequency capacitive reactance formula can overcome above problem.
Summary of the invention
The object of the invention is to propose a kind of high frequency capacitive reactance formula cable wireless theft-proof alarm, there is the advantage that structure is simple, be convenient to miniaturization, easy-to-operate.
For achieving the above object, following technical scheme is adopted:
A kind of high frequency capacitive reactance formula cable wireless theft-proof alarm, comprises tunable high-frequency signal generator 1, high-frequency output circuit 2, capacitive reactance testing circuit 3, trigger alarm circuit 4, it is characterized in that:
Tunable high-frequency signal generator 1 produces high-frequency signal, this signal is adjustable, mainly according to the distributed capacitance of tested cable and the frequency of impedance conditions decision tunable high-frequency signal generator, this electrical signal of the frequency is transported to high-frequency output circuit 2 and amplifies, send into capacitive reactance testing circuit 3 after this electrical signal of the frequency seals in detected cable 5 after amplification and carry out capacitive reactance detection, after cable 5 is cut-off, the total capacitance of cable changes, because high frequency electrical signal is connected in series on cable, the capacitive reactance that cable feeds back in capacitive reactance testing circuit 3 changes, after the tested survey of this change, capacitive reactance testing circuit 3 exports a voltage U v trigger alarm circuit 4, trigger alarm circuit 4 sends warning, radio is launched through internal wireless module, reach the object of informing, achieve the function that high frequency capacitive reactance formula cable wireless theft-proof alarm is reported to the police.
Tunable high-frequency signal generator 1, is made up of 555 circuit, and the frequency of output can regulate, and is prior art.
In high-frequency output circuit 2;
Triode TV1 and triode TV2 emitter connect the positive level of power supply, triode TV1 collector is connected with the collector of triode TV3 through resistance R3, triode TV2 collector is connected with the collector of triode TV4 through resistance R4, triode TV3 and triode TV4 emitter connect power-level, the base stage of triode TV1 is connected with the current collection collection of triode TV4 through resistance R6, the base stage of triode TV3 connects through the current collection collection of resistance R8 and TV4, the base stage of triode TV2 is connected with the collector of triode TV3 through resistance R5, the base stage of triode TV4 is connected with the collector of triode TV3 through resistance R7, the base stage of triode TV1 connects power supply negative terminal through resistance R2, the base stage of triode TV2 connects power supply negative terminal through resistance R1, the base stage of triode TV3 is connected with the positive terminal of diode D1, the base stage of triode TV4 is connected with the positive terminal of diode D2, access high frequency signal generator 1 after diode D1 is connected with the negative pole end of diode D2, thus export large shaping high-frequency alternating current from TV3 after playing the low power high-frequency ac source of access, the collector of TV4 exports,
In capacitive reactance testing circuit 3:
The high-frequency electrical series connection A exported by high-frequency output circuit 2, after the cable 5 of B two ends access, connect VC rectification circuit, A, the other end that B two ends seal in cable requires to be in open circuit, the direct current that VC rectification exports is through the resistance R9 of series connection, contact resistance R10 respectively, the two ends of electric capacity C1, the positive terminal of the cathode connecting diode D3 of VC rectification circuit and optocoupler CP, the negative pole end contact resistance R11 of diode D3, electric capacity C2, optocoupler CP, resistance R11, the other end of electric capacity C2 connects the electric capacity C1 of negative pole end connection and the contact place of resistance R9 of VC rectification circuit, the RC circuit time constant that wherein resistance R10 and electric capacity C1 forms is greater than the RC circuit time constant that resistance R11 and electric capacity C2 forms, after the cable connected when AB two ends is cut off a part, cable total capacitance is a certain amount of by suddenly dropping to, cause the capacitive reactance of high-frequency electrical after cable maximum, make resistance R10, electric capacity C1 and resistance R11, the voltage drop at electric capacity C2 two groups of RC circuit two ends, because the time constant of two groups of RC circuit is different, therefore reverse voltage Uv can be produced at diode D3 two ends, voltage U v progressively drops to zero in time, this voltage U v can trigger alarm circuit 4 after optocoupler CP simultaneously.
In trigger alarm circuit 4:
Optocoupler CP contact resistance R12, the trigger pip that optocoupler CP exports is amplified through resistance R12 connecting triode TV5, the emitter of triode TV5 connects power positive end, collector connecting resistance R13, resistance R14, another termination power supply negative terminal of resistance R13, another termination controllable silicon V of resistance R14 controls pole, the negative pole termination hummer HA of controllable silicon V and wireless transmitter module TT, another termination power supply negative terminal of hummer HA and wireless transmitter module TT power lead, the positive pole termination normally closed switch K of controllable silicon V, another termination power positive end of normally closed switch K, material is thus formed trigger alarm circuit, work when trigger pip triggers hummer HA and wireless transmitter module TT after controllable silicon through resistance R14 again after triode TV5 amplifies simultaneously, sound and radio transmission, reach the staff informing and keep and listen, needing to press normally closed switch K again when removing warning makes controllable silicon end.
Detected cable 5 comprises the twisted polyethylene cable of multicore, twisted-pair feeder, concentric cable and multiplely can form electric capacity between heart yearn and heart yearn, and the cable of high frequency capacitive reactance (impedance) relation, require to open a way in cable one end, the other end accesses tested end A, B two ends of specifying.
Compared with prior art tool of the present invention has the following advantages and beneficial effect:
It is simple that the present invention has structure, convenient test, solves electric-resistivity method and detect and need to form the complicacy also come closed-loop path, while also solve the equipment and connection complexity that response formula detection method brings.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention
Fig. 2 is circuit diagram of the present invention
Wherein: 1-adjustable signal generator, 2-high-frequency output circuit, 3-capacitive reactance testing circuit, 4-trigger alarm circuit, 5-are detected cable.
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
A kind of high frequency capacitive reactance formula cable wireless theft-proof alarm, comprises tunable high-frequency signal generator 1, high-frequency output circuit 2, capacitive reactance testing circuit 3, trigger alarm circuit 4, it is characterized in that:
Tunable high-frequency signal generator 1 produces high-frequency signal, this signal is adjustable, mainly according to the distributed capacitance of tested cable and the frequency of impedance conditions decision tunable high-frequency signal generator, this electrical signal of the frequency is transported to high-frequency output circuit 2 and amplifies, send into capacitive reactance testing circuit 3 after this electrical signal of the frequency seals in detected cable 5 after amplification and carry out capacitive reactance detection, after cable 5 is cut-off, the total capacitance of cable changes, because high frequency electrical signal is connected in series on cable, the capacitive reactance that cable feeds back in capacitive reactance testing circuit 3 changes, after the tested survey of this change, capacitive reactance testing circuit 3 exports a voltage U v trigger alarm circuit 4, trigger alarm circuit 4 sends warning, radio is launched through internal wireless module, reach the object of informing, achieve the function that high frequency capacitive reactance formula cable wireless theft-proof alarm is reported to the police.
Tunable high-frequency signal generator 1, is made up of 555 circuit, and the frequency of output can regulate, and is prior art.
In high-frequency output circuit 2;
Triode TV1 and triode TV2 emitter connect the positive level of power supply, triode TV1 collector is connected with the collector of triode TV3 through resistance R3, triode TV2 collector is connected with the collector of triode TV4 through resistance R4, triode TV3 and triode TV4 emitter connect power-level, the base stage of triode TV1 is connected with the current collection collection of triode TV4 through resistance R6, the base stage of triode TV3 connects through the current collection collection of resistance R8 and TV4, the base stage of triode TV2 is connected with the collector of triode TV3 through resistance R5, the base stage of triode TV4 is connected with the collector of triode TV3 through resistance R7, the base stage of triode TV1 connects power supply negative terminal through resistance R2, the base stage of triode TV2 connects power supply negative terminal through resistance R1, the base stage of triode TV3 is connected with the positive terminal of diode D1, the base stage of triode TV4 is connected with the positive terminal of diode D2, access high frequency signal generator 1 after diode D1 is connected with the negative pole end of diode D2, thus export large shaping high-frequency alternating current from TV3 after playing the low power high-frequency ac source of access, the collector of TV4 exports,
In capacitive reactance testing circuit 3:
The high-frequency electrical series connection A exported by high-frequency output circuit 2, after the cable 5 of B two ends access, connect VC rectification circuit, A, the other end that B two ends seal in cable requires to be in open circuit, the direct current that VC rectification exports is through the resistance R9 of series connection, contact resistance R10 respectively, the two ends of electric capacity C1, the positive terminal of the cathode connecting diode D3 of VC rectification circuit and optocoupler CP, the negative pole end contact resistance R11 of diode D3, electric capacity C2, optocoupler CP, resistance R11, the other end of electric capacity C2 connects the electric capacity C1 of negative pole end connection and the contact place of resistance R9 of VC rectification circuit, the RC circuit time constant that wherein resistance R10 and electric capacity C1 forms is greater than the RC circuit time constant that resistance R11 and electric capacity C2 forms, after the cable connected when AB two ends is cut off a part, cable total capacitance is a certain amount of by suddenly dropping to, cause the capacitive reactance of high-frequency electrical after cable maximum, make resistance R10, electric capacity C1 and resistance R11, the voltage drop at electric capacity C2 two groups of RC circuit two ends, because the time constant of two groups of RC circuit is different, therefore reverse voltage Uv can be produced at diode D3 two ends, voltage U v progressively drops to zero in time, this voltage U v can trigger alarm circuit 4 after optocoupler CP simultaneously.
In trigger alarm circuit 4:
Optocoupler CP contact resistance R12, the trigger pip that optocoupler CP exports is amplified through resistance R12 connecting triode TV5, the emitter of triode TV5 connects power positive end, collector connecting resistance R13, resistance R14, another termination power supply negative terminal of resistance R13, another termination controllable silicon V of resistance R14 controls pole, the negative pole termination hummer HA of controllable silicon V and wireless transmitter module TT, another termination power supply negative terminal of hummer HA and wireless transmitter module TT power lead, the positive pole termination normally closed switch K of controllable silicon V, another termination power positive end of normally closed switch K, material is thus formed trigger alarm circuit, work when trigger pip triggers hummer HA and wireless transmitter module TT after controllable silicon through resistance R14 again after triode TV5 amplifies simultaneously, sound and radio transmission, reach the staff informing and keep and listen, needing to press normally closed switch K again when removing warning makes controllable silicon end.
Detected cable 5 comprises the twisted polyethylene cable of multicore, twisted-pair feeder, concentric cable and multiplely can form electric capacity between heart yearn and heart yearn, and the cable of high frequency capacitive reactance (impedance) relation, require to open a way in cable one end, the other end accesses tested end A, B two ends of specifying.
In FIG, tunable high-frequency signal generator 1 produces high-frequency signal, this signal is adjustable, mainly according to the distributed capacitance of tested cable and the frequency of impedance conditions decision tunable high-frequency signal generator, this electrical signal of the frequency is transported to high-frequency output circuit 2 and amplifies, send into capacitive reactance testing circuit 3 after this electrical signal of the frequency seals in detected cable 5 after amplification and carry out capacitive reactance detection, after cable 5 is cut-off, the total capacitance of cable changes, because high frequency electrical signal is connected in series on cable, the capacitive reactance that cable feeds back in capacitive reactance testing circuit 3 changes, after the tested survey of this change, capacitive reactance testing circuit 3 exports a voltage U v trigger alarm circuit 4, trigger alarm circuit 4 sends warning, radio is launched through internal wireless module, reach the object of informing, achieve the function that high frequency capacitive reactance formula cable wireless theft-proof alarm is reported to the police.
In fig. 2, tunable high-frequency signal generator 1 sets suitable high-frequency signal according to cable length size, this frequency can produce certain capacitive reactance in the cable, export to high-frequency output circuit 2, carry out shaping and amplification, comprise: TV1 and TV2 sends out and thank to pole and just connecing power supply, collector is respectively through resistance R3, R4 and TV3 is connected with the collector of TV4, TV3 and TV4 emitter connects power-, the base stage of TV1 and TV3 is respectively through resistance R6, the current collection collection of R8 and TV4 connects, the base stage of TV2 and TV4 is respectively through resistance R5, the collector of R7 and TV3 connects, TV1, the base stage of TV2 is respectively through resistance R2, power supply negative terminal is connect after R1, TV3, the base stage of TV4 respectively with diode D1, the positive terminal of D2 is connected, D1, the negative pole end of D2 accesses high frequency signal generator after being connected, from TV3 after shaping amplification, the collector of TV4 exports, through the tested cable 5 of series connection, be connected to capacitive reactance testing circuit 3 pairs of cables to detect, realize monitoring cable whether to be cut off, capacitive reactance testing circuit 3 comprises rectification circuit VC, the direct current that VC rectification exports is after the resistance R9 of series connection, contact resistance R10 respectively, electric capacity C1, two ends, the positive terminal of the cathode connecting diode D3 of this part, optocoupler CP, the negative pole end contact resistance R11 of D3, electric capacity C2, optocoupler CP, R11, C2, the other end connect the contact place of negative pole end C1 and the R9 of this part, wherein the RC circuit time constant of R10 and C1 composition is greater than the RC circuit time constant of R11 and C2 composition, after the cable connected when AB two ends is cut off a part, cable total capacitance is a certain amount of by suddenly dropping to, cause the capacitive reactance of high-frequency electrical after cable maximum, make R10, C1 and R11, the voltage drop at C2 two groups of RC circuit two ends, because the time constant of two groups of RC circuit is different, therefore reverse voltage Uv can be produced at D3 two ends, voltage U v progressively drops to zero in time, this voltage U v can trigger alarm circuit 4 after optocoupler CP simultaneously, warning circuit 4 realizes sounding and radio transmission, the distally function of personnel's warning, comprise optocoupler CP contact resistance R12, the trigger pip that optocoupler CP exports connects TV5 through R12 and amplifies, sending out of TV5 thanks to pole connection power positive end, collector connecting resistance R13, R14, another termination power-of R13, another termination controllable silicon V of R14 controls pole, the negative pole termination hummer HA of controllable silicon V, connect wireless transmitter module TT, another termination power-of HA and TT power lead, the positive pole termination normally closed switch K of controllable silicon V, another termination power of K switch just, material is thus formed trigger alarm circuit, work when trigger pip triggers hummer HA and wireless transmitter module TT after controllable silicon through R14 again after TV5 amplifies simultaneously, sound and radio transmission, reach the staff informing and keep and listen, needing to press K switch again when removing warning makes controllable silicon end, detected cable 5 is peripheral hardware parts of high frequency capacitive reactance formula cable wireless theft-proof alarm, and this alarm is detachable with detected cable 5, and the feature of this circuit is that capacitive reactance testing circuit 3 separates completely with trigger alarm circuit 4, by optocoupler coupled electrical signal.
Claims (1)
1. a high frequency capacitive reactance formula cable wireless theft-proof alarm, comprises tunable high-frequency signal generator (1), high-frequency output circuit (2), capacitive reactance testing circuit (3), trigger alarm circuit (4), it is characterized in that:
In high-frequency output circuit (2):
Triode TV1 and triode TV2 emitter connect the positive level of power supply, triode TV1 collector is connected with the collector of triode TV3 through resistance R3, triode TV2 collector is connected with the collector of triode TV4 through resistance R4, triode TV3 and triode TV4 emitter connect power-level, the base stage of triode TV1 is connected with the current collection collection of triode TV4 through resistance R6, the base stage of triode TV3 connects through the current collection collection of resistance R8 and TV4, the base stage of triode TV2 is connected with the collector of triode TV3 through resistance R5, the base stage of triode TV4 is connected with the collector of triode TV3 through resistance R7, the base stage of triode TV1 connects power supply negative terminal through resistance R2, the base stage of triode TV2 connects power supply negative terminal through resistance R1, the base stage of triode TV3 is connected with the positive terminal of diode D1, the base stage of triode TV4 is connected with the positive terminal of diode D2, diode D1 accesses high frequency signal generator (1) after being connected with the negative pole end of diode D2,
In capacitive reactance testing circuit (3):
After the cable (5) of high-frequency electrical series connection A, B two ends access exported by high-frequency output circuit (2), connect VC rectification circuit, the other end that A, B two ends seal in cable requires to be in open circuit, the direct current that VC rectification exports is through the resistance R9 of series connection, the two ends of contact resistance R10, electric capacity C1 respectively, the positive terminal of the cathode connecting diode D3 of VC rectification circuit and optocoupler CP, the negative pole end contact resistance R11 of diode D3, electric capacity C2, optocoupler CP, the other end of resistance R11, electric capacity C2 connects the electric capacity C1 of negative pole end connection and the contact place of resistance R9 of VC rectification circuit;
In trigger alarm circuit (4):
Optocoupler CP contact resistance R12, the trigger pip that optocoupler CP exports is amplified through resistance R12 connecting triode TV5, the emitter of triode TV5 connects power positive end, collector connecting resistance R13, resistance R14, another termination power supply negative terminal of resistance R13, another termination controllable silicon V of resistance R14 controls pole, the negative pole termination hummer HA of controllable silicon V and wireless transmitter module TT, another termination power supply negative terminal of hummer HA and wireless transmitter module TT power lead, the positive pole termination normally closed switch K of controllable silicon V, another termination power positive end of normally closed switch K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420716906.9U CN204229563U (en) | 2014-11-25 | 2014-11-25 | High frequency capacitive reactance formula cable wireless theft-proof alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420716906.9U CN204229563U (en) | 2014-11-25 | 2014-11-25 | High frequency capacitive reactance formula cable wireless theft-proof alarm |
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| Publication Number | Publication Date |
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| CN204229563U true CN204229563U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420716906.9U Expired - Fee Related CN204229563U (en) | 2014-11-25 | 2014-11-25 | High frequency capacitive reactance formula cable wireless theft-proof alarm |
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| CN (1) | CN204229563U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104376669A (en) * | 2014-11-25 | 2015-02-25 | 湖北鼎汉投资有限公司 | High-frequency capacitive reactance type wireless cable anti-theft alarm |
| 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 |
-
2014
- 2014-11-25 CN CN201420716906.9U patent/CN204229563U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104376669A (en) * | 2014-11-25 | 2015-02-25 | 湖北鼎汉投资有限公司 | High-frequency capacitive reactance type wireless cable anti-theft alarm |
| CN104376669B (en) * | 2014-11-25 | 2017-01-18 | 湖北鼎汉投资有限公司 | High-frequency capacitive reactance type wireless cable anti-theft alarm |
| 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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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20161125 |