CN104407272A - Cable identification device - Google Patents
Cable identification device Download PDFInfo
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- CN104407272A CN104407272A CN201410784571.9A CN201410784571A CN104407272A CN 104407272 A CN104407272 A CN 104407272A CN 201410784571 A CN201410784571 A CN 201410784571A CN 104407272 A CN104407272 A CN 104407272A
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Abstract
The invention discloses a cable identification device. The cable identification device comprises a signal generator and a signal receiver, wherein the signal generator comprises a power module, a high-voltage transformation unit and a discharge control unit, the high-voltage transformation unit comprises an electronic pulse generation module as well as a voltage detection circuit and a pulse capacitor which are connected onto the electronic pulse generation module in parallel, and the discharge control unit comprises time relays for controlling periodic discharge for cables, direct current electromagnets and a mechanical periodic discharge switch connected to an output end of the pulse capacitor; the signal receiver comprises a flexible Rogowski coil, a control unit, a signal processing unit connected with the flexible Rogowski coil, a data acquisition unit, a triggering unit and a human-machine interaction unit which are connected with the control unit as well as a power management module for supplying electricity to all the units in the signal receiver. The cable identification device has characteristics of stable and reliable identification performance, high anti-interference performance, high applicability, small size and the like.
Description
Technical field
The present invention relates to a kind of cable identification device, belong to cable recognition technology field.
Background technology
Along with urban economy is fast-developing and the raising of life of urban resident quality, the requirement of people to living environment and appearance of city is also more and more higher.Power cable is powered due to its safety, reliably, is conducive to the advantage such as beautifying city and factories and miness layout, cable is made to become a kind of trend of New Times new century, it produces brand-new realistic effect to beautifying urban environment and lifting city function, obtains and applies more and more widely.The fast development of urban economy, need for electricity also increases substantially, and makes cable rush to repair operation and cable and moves and change engineering and also get more and more.Change and rush to repair in operation moving, be often many different cross-sectional in cable duct or excavation region, the cable of different brackets lays side by side, needing to distinguish which bar is the cable that this task will be found, and this work is referred to as cable identification.According to the requirement of " electric power safety working regulation " 10.2.1.9 bar, cable identification work relates to the person and device security, and the reliability of identification result is extremely important, and necessary 100% accurately and reliably.
The classic method of cable identification checks drawing, and manual site examines, but the drawing of cable laying usually inadequate specification, detailed not, even lose damage, bury the change disappearance of environment and marker in addition underground, be difficult to find target cable.
The main cable identifier that relies on carries out cable identification at present.The identifier device of Present Domestic Wai Ge producer is with the typical case the most of SEBAKMT and BAUR company.Although most of identifier Realization of Product circuit structure and technical parameter all have difference, but its principle of work is roughly the same, mainly contain pulse polarity method (direction of current method, the most universal at present) and frequency induction method two kinds (mainly carrying out in conjunction with cable trace detection operation).Namely a signal is added with transmitter from target cable head end, this signal has the characteristic quantity with the power current voltage signal significant difference running cable, the time of launching as the size of the shape of sense of current, signal, amplitude, signal and cycle and duration etc., then detect the characteristic quantity of observation signal on each bar cable need differentiating place with receiver on request, thus determine this target cable.
Find in actual job, the most universal all kinds of cable identifiers of current use are meeting under the disturbed conditions such as strong induced electricity, usually cause judging or apply the situation that signal is more difficult, even damage identification instrument by accident, this moves to change to cable and brings great security risk with breakdown repair work.The analysis found that, domestic many cities and area due in order to easy construction or cable passage nervous, many mesolow cables and EHV XLPE power cable use same channels to lay, polycore cable and single core cable mixing are laid, and the objective environment of high water stage often causes cable sheath multipoint earthing in a part of cable passage, when have a power failure tested cable and same passage run cable lay in the same way longer or different cable grounding resistance difference larger, often cause and induce stronger induction current or voltage on power failure cable line; In addition; due to the revision of new edition design specifications, the sheath induced voltage of original single core cable, under the prerequisite having insulation protection, has brought up to 300V from 50V; while obtaining the advantage that cable length is elongated, intermediate head tails off, single-ended cable sheath induced voltage improves greatly.
The cable identifier of current use is in order to reach the safe and reliable performance taking into account small in volume, signal generator adopts middle low power, and the current signal amplitude added is by the impact of different cable grounding resistance, often cause the pulse signal that induced electricity severe jamming signal generator applies, after induced electricity reaches certain numerical value, the automatic protection act of superpotential of instrument, thus cause signal to apply difficulty, part home products is without over-voltage protection module, the fault that even occurring smolders burns out, this is also one of reason being unfavorable for that the current digital miniwatt cable identifier generally used cannot normally work, thus greatly have impact on cable repairing and road move the on-the-spot efficiency changing the work such as engineering.
And no matter be domestic or external import instrument, receiving instrument and probe are comparatively large, are not too applicable to the application of test site, as cable shaft ditch, narrow space, receiving instrument is transferred to other use comparatively difficult, is sometimes even difficult to instrument to carry into Jing Gou; The cable discharge of laying at present is comparatively tight, and the distance between cable and space are too little, cannot be placed in therebetween by probe or clamp, directly affects carrying out smoothly of test.
So it is reliable and stable that the uniqueness of cable differentiates to be badly in need of a kind of recognition performance, volume is little, lightweight, be convenient to receiving trap, particularly probe segment that tester carries with, and given volume will be applicable to the test request of close-packed arrays cable.
In view of this, the present inventor studies this, and develop a kind of cable identification device specially, this case produces thus.
Summary of the invention
The object of this invention is to provide a kind of cable identification device, there is the features such as recognition performance is reliable and stable, anti-interference by force, applicability is strong, volume is little.
To achieve these goals, solution of the present invention is:
A kind of cable identification device, comprise signal generator and signal receiver, wherein, described signal generator comprises power module, high-voltage transformation unit and control of discharge unit, described high-voltage transformation unit comprises electronic impulse generation module, be connected in parallel on the voltage detecting circuit in electronic impulse generation module and pulsed capacitance, described control of discharge unit comprises the time relay, DC electromagnet for controlling to carry out cable periodic discharge, and is connected to the mechanical type periodic discharging switch of pulsed capacitance output terminal, described signal receiver comprises flexible Luo-coil, control module, the signal processing unit be connected with flexible Luo-coil, the data acquisition unit be connected with control module, trigger element and man-machine interaction unit, and the power management module being in signal receiver, unit is powered, the low-voltage dc power supply that signal generator power module provides enters electronic impulse generation module after control of discharge unit, direct output high direct voltage, voltage detecting circuit detects high direct voltage output valve in real time, the high direct voltage exported is pulsed capacitance charging, the energy of cable discharge is provided, then by the timing of control of discharge unit, cable is discharged, flexible Luo-coil detects the pulse signal of tested cable in real time, and the pulse signal collected is sent to signal processing unit, signal processing unit after filtering, signal sends to data acquisition unit after amplifying process, data acquisition unit sends to control module after the simulating signal of input is converted to digital signal, after control module processes by analysis, relevant information is shown by man-machine interaction unit, control module is simultaneously according to the output signal of trigger element, the collection of dash current signal waveform in automatic startup target cable, and automatically identify target cable, shown by man-machine interaction unit.
As preferably, described control of discharge unit comprises the mechanical type ground connection discharge switch being connected in parallel on pulsed capacitance two ends further, and when cable induction voltage to be identified exceeds gap breakdown voltage, ground connection discharge switch is breakdown, over the ground discharge prevention signal generator; When signal generator power-off or accident power-off, the action of ground connection discharge switch, pulsed capacitance shorted to earth, release store electrical energy, prevents signal generator from exporting charged.
As preferably, described control of discharge unit is primarily of 2 groups of time relays, 2 groups of DC electromagnets, 1 mechanical type periodic discharging switch, 1 mechanical type ground connection discharge switch, and moving electrode and stationary electrode are formed, in DC electromagnet, iron staff connects moving electrode, stationary electrode is connected to signal generator output terminal, DC electromagnet is connected with power module, the time relay controls the on/off of DC electromagnet, direct solenoid railway traction moving electrode, when DC electromagnet power supply disconnects, DC electromagnet is affected by gravity and falls, dynamic copper electrode contacts with quiet copper electrode, pulsed capacitance discharges to target cable impacting with high pressure, produce pulse current in the cable, pulse current is maximum reaches hundreds of ampere.When DC electromagnet power supply closes, DC electromagnet adhesive, copper electrode is moved in pull-up, and isolate with cable, isolation voltage reaches 5kV, completes single step of releasing electric process, and the time relay constantly repeats above-mentioned discharge process, forms periodic discharging.The make-and-break time of regulating time relay, the cycle of adjustable pulses generation, setting cycle be 6 seconds adjustable by 15 seconds.
As preferably, described power module comprises power supply adaptor, rechargeable battery and power switch, power supply adaptor to be 24VDC power supply by the 220VAC Power convert of input be rechargeable battery charging, rechargeable battery by power switch for control of discharge unit provides low-voltage dc power supply.Described rechargeable battery adopts polymer Li-ion rechargeable battery.
As preferably, described pulsed capacitance adopts the noninductive pulsed capacitance of high pressure, filled with oil, and overload capacity is strong, safe and reliable.
As preferably, described high-voltage transformation unit adopts 30KV silicon rubber insulation line to carry out the direct wiring of each circuit to connect.
Described electronic impulse generation module mainly adopts electronic type high frequency high voltage dc power source to convert voltage 24V the DC voltage of 3kV to, charges to storage capacitor.Its input voltage is DC24V, exports the negative polarity high pressure into direct current 3kV.
As preferably, the control module of described signal receiver adopts 51 system single-chip microcomputers.
As preferably, described trigger element comprises and is connected in parallel on peak comparator on signal processing unit and valley comparer, and peakedness ratio is connected and door and d type flip flop successively with the output terminal of valley comparer comparatively by force, and the control module of d type flip flop is connected.
As preferably, described man-machine interaction unit comprises the button that display screen and user for data display input.
During above-mentioned a kind of cable identification device work, impacting with high pressure signal is applied on target cable core by signal generator, and signal, along cable distribution to far-end, then flows back to signal generator through ground connection.In discriminating place, signal receiver utilizes a flexible Luo-coil measurement to flow through the current signal of each bar cable, then goes out target cable according to the characteristic differentiation of signal.
Compared with prior art, cable identification device tool of the present invention has the following advantages:
1) signal generator can produce the direct current negative polarity high pressure of 3kV, the high direct voltage exported is impulse capacitor charging, the energy of cable discharge is provided, by the timing of mechanical type periodic discharging switch, cable is discharged, under solving strong induced electricity, pulse signal is difficult to the problem applied;
2) adopt high performance chargeable lithium cell to power, normally can work under most rugged environment, ensure the adaptability of instrument, solve the problem of on-the-spot AC-less power;
3) security of signal generator is high, inside establishes control of discharge unit, can under the emergency circumstance or powering-off state direct short-circuit pulsed capacitance, ensure cable identification device without High voltage output; Simultaneously when cable induction voltage to be identified exceeds gap breakdown voltage, ground connection discharge switch is breakdown, over the ground discharge prevention instrument, and antijamming capability is strong; Casing and High voltage output place of working between add protection, ensure the safety of operating personnel;
4) electric signal generator overall appearance is generous, simple and practical, and when operating, wiring is easy, simple to operate, and stable performance is safe and reliable;
5)signal receiver adopts portable detecting structure, after getting pulse signal by flexible Luo-coil, through signal processing unit filtering, after amplifying process, flow to control module and carry out operational analysis, after being confirmed to be effective impulse, shown by good man-machine interface, utilize the characteristic of flexible Luo-coil and the filter action of signal processing unit bandpass filter, eliminate the impact of power current, prevent erroneous judgement, as sniffer, because scene detects under the environment of disturbance of industry frequency, the Intelligent Measurement of instrument can judge the possibility of failing to judge unavoidably by accident, therefore need to provide good man-machine interaction, make up the misjudgment phenomenon that may occur.
6) because site environment exists disturbance of industry frequency, cable size is thick, clamp opening effectively can not cover the problems such as cable, so traditional caliper brake current transformer can not be adopted, and the flexible Luo-coil that the present invention adopts is the coil of a hollow circular, there is no iron core, without hysteresis effect, input is without saturated, measurement range is wide, big current can be born, be not subject to outside electromagnetic interference, and Luo-coil itself does not have direct circuit to contact with tested loop, but pass through electromagnetic field couples, achieve measuring circuit and tested loop electrically on isolation, easily be accepted, use safety, Luo-coil response frequency wide ranges, the response time is fast, and the response time can reach uS rank, can comply with fast changing electric current, the linearity that Luo-coil exports is better, can reach 0.2%, can the size of accurately reflected input signal.
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the cable identification device detected state figure of the present embodiment;
Fig. 2 is the signal generator theory diagram of the present embodiment;
Fig. 3 is the signal generator control of discharge unit electrical schematic diagram of the present embodiment;
Fig. 4 is the signal receiver theory diagram of the present embodiment;
Fig. 5 is the signal receiver trigger element schematic diagram of the present embodiment.
Embodiment
As shown in Figure 1, a kind of cable identification device, comprises signal generator 1 and signal receiver 2, during work, impacting with high pressure signal is applied on target cable 3 core by signal generator 1, and signal propagates into far-end along cable 3, then flows back to signal generator 1 through ground connection.In discriminating place, signal receiver 2 utilizes a flexible Luo-coil 21 to measure the current signal flowing through each bar cable 3, then goes out target cable according to the characteristic differentiation of signal.
As shown in Figure 2, described signal generator 1 comprises power module, high-voltage transformation unit and control of discharge unit 14, described power module comprises power supply adaptor 11, rechargeable battery 12 and power switch 13, the 220VAC Power convert of input is 24VDC power supply by power supply adaptor is that rechargeable battery 12 charges, rechargeable battery 12 by power switch 13 for control of discharge unit 14 provides low-voltage dc power supply.In the present embodiment, described rechargeable battery 12 adopts polymer Li-ion rechargeable battery, and direct current exports 24V, capacity reaches 20Ah, and moment, working current was at more than 40A, was equipped with high-performance electric source adapter 11, maximum charging current can reach 2.5A, and has constant-current charge and be full of automatic stop function.Described high-voltage transformation unit comprises electronic impulse generation module 15, is connected in parallel on the voltage detecting circuit 16 in electronic impulse generation module 15 and pulsed capacitance 17.The principle of work of signal generator 1 is: the low-voltage dc power supply that described power module provides enters electronic impulse generation module 15 after control of discharge unit, direct output high direct voltage, voltage detecting circuit 16 detects high direct voltage output valve in real time, the high direct voltage exported is that pulsed capacitance 17 charges, the energy of cable discharge is provided, then by the timing of control of discharge unit, cable is discharged.
Described control of discharge unit is primarily of very first time relay 1KT, second time relay 2KT, cable periodic discharging DC electromagnet 3YA1, ground connection electric discharge DC electromagnet 3YA2, be connected to the mechanical type periodic discharging switch S 1 of pulsed capacitance 17 output terminal, be connected in parallel on the mechanical type ground connection discharge switch S2 at pulsed capacitance 17 two ends, and moving electrode and stationary electrode are formed, in 2 DC electromagnets, iron staff connects moving electrode, stationary electrode is connected to signal generator output terminal, DC electromagnet is connected with power module, very first time relay 1KT, second time relay 2KT is timing relay, wherein, within 6 seconds to 15 seconds, (to the general delay time of the very first time relay 1KT fundamental purpose one be full of electricity in order to ensure storage capacitor, two is to form obvious period distances, convenient operation identification), in the present embodiment, very first time relay 1KT sets time delay 6 seconds, and the second time relay 2KT is set as 0.4 second.The on/off of Control DC electromagnet, direct solenoid railway traction moving electrode, when DC electromagnet power supply disconnects, DC electromagnet is affected by gravity and falls, dynamic copper electrode contacts with quiet copper electrode, pulsed capacitance 17 pairs of target cable impacting with high pressure electric discharges, produce pulse current in the cable, pulse current is maximum reaches hundreds of ampere.When DC electromagnet power supply closes, DC electromagnet adhesive, copper electrode is moved in pull-up, isolate with cable, isolation voltage reaches 5kV, completes single step of releasing electric process, as shown in Figure 3, the specific works principle of control of discharge unit is: after turning on the power switch 13, and DC electromagnet 3YA1,3YA2 power on pull-up, and two switches are in open mode; 2KT-1 is normally closed contact, very first time relay 1KT connects through contact 2KT-1, owing to being delayed, when after the time delays reaching 6s, very first time relay 1KT action, normally closed contact 1KT-1 opens, cable periodic discharging DC electromagnet 3YA1 power-off, and fall, pulsed capacitance 17 pairs of cable discharges; The normally opened contact 1KT-2 of very first time relay 1KT closes, second time relay 2KT is energized, after 0.4s, second time relay 2KT action, normally closed contact 2KT-1 action is opened, very first time relay 1KT power-off, normally closed contact 1KT-1 power-failure close, cable periodic discharging DC electromagnet 3YA1 powers on pull-up, and electronic impulse generation module 15 paired pulses electric capacity 17 charges, and normally opened contact 1KT-2 power-off is opened, time relay 2KT power-off, normally closed contact 2KT-1 closes, and time relay 1KT powers on, and new loop cycle starts.When signal generator power-off or accident power-off, ground connection electric discharge DC electromagnet 3YA2 power-off, ground connection discharge switch S2 action falls, pulsed capacitance 16 shorted to earth, release store electrical energy, prevents device and exports charged, when cable induction voltage to be identified exceeds gap breakdown voltage, S2 is breakdown for ground connection discharge switch, over the ground discharge prevention signal generator;
In the present embodiment, described pulsed capacitance 16 adopts the noninductive pulsed capacitance of high pressure, filled with oil, and overload capacity is strong, safe and reliable.High frequency high voltage dc power source output terminal is connected to 50k Ω resistance, is connected to the storage capacitor of 10 μ F/5kV, and during power frequency, capacitive reactance is about 318 Ω, when induced voltage in heart yearn is 300V, and the undercurrent 1A of generation, and DC pulse current can reach hundreds of ampere.And DC pulse voltage can reach 3kV, much larger than induced voltage, pulse can be easy to be applied on cable.
Described electronic impulse generation module 16 mainly adopts electronic type high frequency high voltage dc power source 24V DC voltage to be converted to the DC voltage of 3kV, charges to storage capacitor.The input voltage of electronic impulse generation module 16 is DC24V, exports the negative polarity high pressure into direct current 3kV.Described high-voltage transformation unit adopts 30KV silicon rubber insulation line to carry out the direct wiring connection of each circuit.
As shown in Figure 4, described signal receiver 2 comprises flexible Luo-coil 21, control module 23, the signal processing unit 22 be connected with flexible Luo-coil coil 21, the data acquisition unit 24 be connected with control module 23, trigger element 25 and man-machine interaction unit 26, and the Power Management Unit being in signal receiver, unit is powered.Flexible Luo-coil 21 detects the pulse signal of tested cable in real time, and the pulse signal collected is sent to signal processing unit 22, signal processing unit 22 after filtering, signal sends to data acquisition unit 24 after amplifying process, data acquisition unit 24 sends to control module 23 after the simulating signal of input is converted to digital signal, relevant information is shown by man-machine interaction unit 26 after processing by analysis by control module 23, control module 23 can according to the output signal of trigger element 25, the collection of dash current signal waveform in automatic startup target cable, simultaneously according to the data gathered, automatic decision goes out target cable, and shown by man-machine interaction unit.
Described man-machine interaction unit 26 comprises liquid crystal display for data display and the button that inputs of user.Total at the present embodiment Hu, consider and will show pulse waveform signal, therefore display screen employing resolution is the monochromatic giant-screen dot matrix graphic liquid crystal of the surplus of the yellow end of 240X128.Button comprises " start ", " shutdown ", " time-out ", " backlight ", " memory ", " comparison ", " moving to left ", " moving to right " eight keys.
The control module 23 of described signal receiver 2 adopts 51 system single-chip microcomputer 89C58, has the EPROM of 32K byte, therefore without the need to outside extender storer in single-chip microcomputer 89C58 sheet.Single-chip microcomputer 89C58 according to the output signal of trigger element, can start the collection of dash current signal waveform in target cable, and is presented on liquid crystal display automatically, and simultaneously according to the data gathered, automatic decision goes out target cable.
As shown in Figure 5, described trigger element 25 comprises and is connected in parallel on peak comparator 251 on signal processing unit 22 and valley comparer 252, peakedness ratio stronger 251 and the output terminal of valley comparer 252 are connected and door 253 and d type flip flop 254 successively, and the control module 23 of d type flip flop 254 is connected.The data-signal that signal receiver 2 gathers is High-voltage Signal Generator is applied on cable dash current signal at interval of discharge cycle.Due to the uncertainty of dash current signal generation time, only relying on software triggering mode, the Real-time Collection to impacting current signal cannot being ensured.For ensureing, to the Real-time Collection impacting current signal, hardware trigger unit must to be designed.The function of trigger element is exactly the dash current signal of catching in cable, and triggers the collection of single-chip microcomputer turn-on data.The d type flip flop 254 of trigger element 25 has reset function, and after data acquisition completes, can reset d type flip flop 254, to facilitate next trigger data acquisition.In the present embodiment, discharge cycle is about 150 μ s, triggers Real-time Collection gives at about 200 before and after this cycle trigger rate setting after suitable expansion.
Signal receiver 2 described in the present embodiment adopts lithium battery, and lithium battery has the features such as long service life, capacity are large, memory-less effect, use safety.Lithium battery single-unit voltage is 3.6V, and the circuit voltage such as single-chip microcomputer and data acquisition is 5V, therefore adopts the mode of 2 joint series connection in the design, then converts single-chip microcomputer and other chip required voltage to through three linear integrated regulators.Lithium battery voltage is 7.2V, and capacity is 1.2Ah, and battery can run 5 hours for instrument.Cell voltage, with special AD conversion chip, is converted to digital signal by the Power Management Unit described in the present embodiment, can Real-time Collection battery electric quantity, and at liquid crystal display display electricity, automatic shutoff protective functions when simultaneously having a battery undervoltage.Battery charger wide input voltage range (input voltage is AC110 ~ AC220V), has the functions such as over-charge protective.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present invention.
Claims (10)
1. a cable identification device, it is characterized in that: comprise signal generator and signal receiver, wherein, described signal generator comprises power module, high-voltage transformation unit and control of discharge unit, described high-voltage transformation unit comprises electronic impulse generation module, be connected in parallel on the voltage detecting circuit in electronic impulse generation module and pulsed capacitance, described control of discharge unit comprises the time relay, DC electromagnet for controlling to carry out cable periodic discharge, and is connected to the mechanical type periodic discharging switch of pulsed capacitance output terminal, described signal receiver comprises flexible Luo-coil, control module, the signal processing unit be connected with flexible Luo-coil, the data acquisition unit be connected with control module, trigger element and man-machine interaction unit, and the power management module being in signal receiver, unit is powered, the low-voltage dc power supply that signal generator power module provides enters electronic impulse generation module after control of discharge unit, direct output high direct voltage, voltage detecting circuit detects high direct voltage output valve in real time, the high direct voltage exported is pulsed capacitance charging, the energy of cable discharge is provided, then by the timing of control of discharge unit, cable is discharged, flexible Luo-coil detects the pulse signal of tested cable in real time, and the pulse signal collected is sent to signal processing unit, signal processing unit after filtering, signal sends to data acquisition unit after amplifying process, data acquisition unit sends to control module after the simulating signal of input is converted to digital signal, after control module processes by analysis, relevant information is shown by man-machine interaction unit, control module is simultaneously according to the output signal of trigger element, the collection of dash current signal waveform in automatic startup target cable, and automatically identify target cable, shown by man-machine interaction unit.
2. a kind of cable identification device as claimed in claim 1, is characterized in that: described control of discharge unit comprises the mechanical type ground connection discharge switch being connected in parallel on pulsed capacitance two ends further.
3. a kind of cable identification device as claimed in claim 2, it is characterized in that: described control of discharge unit is primarily of 2 groups of time relays, 2 groups of DC electromagnets, 1 mechanical type periodic discharging switch, 1 mechanical type ground connection discharge switch, and moving electrode and stationary electrode are formed, in DC electromagnet, iron staff connects moving electrode, stationary electrode is connected to signal generator output terminal, DC electromagnet is connected with power module, the time relay controls the on/off of DC electromagnet, direct solenoid railway traction moving electrode, when DC electromagnet power supply disconnects, DC electromagnet is affected by gravity and falls, dynamic copper electrode contacts with quiet copper electrode, pulsed capacitance discharges to target cable impacting with high pressure, when DC electromagnet power supply closes, DC electromagnet adhesive, copper electrode is moved in pull-up, isolate with cable, complete single step of releasing electric process.
4. a kind of cable identification device as claimed in claim 1, it is characterized in that: described power module comprises power supply adaptor, rechargeable battery and power switch, the 220VAC Power convert of input is 24VDC power supply by power supply adaptor is rechargeable battery charging, rechargeable battery is by power switch for control of discharge unit provides low-voltage dc power supply, and rechargeable battery adopts polymer Li-ion rechargeable battery.
5. a kind of cable identification device as claimed in claim 1, is characterized in that: described pulsed capacitance adopts the noninductive pulsed capacitance of high pressure.
6. a kind of cable identification device as claimed in claim 1, is characterized in that: described high-voltage transformation unit adopts 30KV silicon rubber insulation line to carry out the direct wiring connection of each circuit.
7. a kind of cable identification device as claimed in claim 1, it is characterized in that: described electronic impulse generation module mainly adopts electronic type high frequency high voltage dc power source to convert voltage 24V the DC voltage of 3kV to, its input voltage is DC24V, exports the negative polarity high pressure into direct current 3kV.
8. a kind of cable identification device as claimed in claim 1, is characterized in that: the control module of described signal receiver adopts 51 system single-chip microcomputers.
9. a kind of cable identification device as claimed in claim 1, it is characterized in that: described trigger element comprises and is connected in parallel on peak comparator on signal processing unit and valley comparer, peakedness ratio is connected and door and d type flip flop successively with the output terminal of valley comparer comparatively by force, and the control module of d type flip flop is connected.
10. a kind of cable identification device as claimed in claim 1, is characterized in that: described man-machine interaction unit comprises display screen for data display and the button that inputs of user.
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