CN104407271A - Signal receiver for cable identification device - Google Patents
Signal receiver for cable identification device Download PDFInfo
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- CN104407271A CN104407271A CN201410784472.0A CN201410784472A CN104407271A CN 104407271 A CN104407271 A CN 104407271A CN 201410784472 A CN201410784472 A CN 201410784472A CN 104407271 A CN104407271 A CN 104407271A
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Abstract
The invention discloses a signal receiver for a cable identification device. The signal receiver includes a flexible Rogowski coil, a control unit, a signal processing unit connected with the flexible Rogowski coil, a data acquisition unit, a triggering unit, a man-machine interaction unit and a power management module which supplies power to all units in the signal receiver, wherein the data acquisition unit, the triggering unit and the man-machine interaction unit are all connected with the control unit; the flexible Rogowski coil detects the pulse signals of a cable undergoing detection in a real-time manner and transmits the collected pulse signals to the signal processing unit; after filtering and amplifying the signals, the signal processing unit transmits the signals to the data acquisition unit; the data acquisition unit converts the input analog signals into digital signals and then transmits the digital signals to the control unit; after analyzing and processing the digital signals, the control unit automatically identifies the target cable and displays related information on the man-machine interaction unit. The signal receiver provided by the invention has the characteristics of stable and reliable identification performance, high anti-interference performance, wide applicability, small size and the like.
Description
Technical field
The present invention relates to a kind of signal receiver for 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 signal receiver for cable identification device specially, this case produces thus.
Summary of the invention
The object of this invention is to provide a kind of signal receiver for cable identification device, have that recognition performance is reliable and stable, applicability is strong, the little feature such as to be easy to carry of volume.
To achieve these goals, solution of the present invention is:
A kind of signal receiver for cable identification device, comprise 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, 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, 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 the above-mentioned work of the signal receiver for cable identification device, 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, signal receiver tool of the present invention has the following advantages:
1)adopt 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,
2) 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 receiver theory diagram of the present embodiment;
Fig. 3 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 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 3, 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 (4)
1. the signal receiver for cable identification device, it is characterized in that: comprise 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, 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 signal receiver for 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.
3. a kind of signal receiver for 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.
4. a kind of signal receiver for cable identification device as claimed in claim 1, is characterized in that: described man-machine interaction unit comprises the button that display screen and user for data display input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784472.0A CN104407271A (en) | 2014-12-16 | 2014-12-16 | Signal receiver for cable identification device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410784472.0A CN104407271A (en) | 2014-12-16 | 2014-12-16 | Signal receiver for cable identification device |
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| CN104407271A true CN104407271A (en) | 2015-03-11 |
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| CN201410784472.0A Pending CN104407271A (en) | 2014-12-16 | 2014-12-16 | Signal receiver for cable identification device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109379897A (en) * | 2016-04-08 | 2019-02-22 | 新能源资产有限公司 | For cancelling the non-clamping method and apparatus of the public cable of underground electric from spatially adjacent electric utility cable identification |
| CN110161570A (en) * | 2019-06-11 | 2019-08-23 | 武汉三相电力科技有限公司 | Cable run path detection method |
| CN112213583A (en) * | 2020-09-29 | 2021-01-12 | 广东电网有限责任公司广州供电局 | Y-shaped receiver for detecting cable signals |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109379897A (en) * | 2016-04-08 | 2019-02-22 | 新能源资产有限公司 | For cancelling the non-clamping method and apparatus of the public cable of underground electric from spatially adjacent electric utility cable identification |
| CN110161570A (en) * | 2019-06-11 | 2019-08-23 | 武汉三相电力科技有限公司 | Cable run path detection method |
| CN112213583A (en) * | 2020-09-29 | 2021-01-12 | 广东电网有限责任公司广州供电局 | Y-shaped receiver for detecting cable signals |
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Application publication date: 20150311 |