CN204101677U - A kind of cable digital display is synchronously fixed a point path instrument - Google Patents
A kind of cable digital display is synchronously fixed a point path instrument Download PDFInfo
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- CN204101677U CN204101677U CN201420558471.XU CN201420558471U CN204101677U CN 204101677 U CN204101677 U CN 204101677U CN 201420558471 U CN201420558471 U CN 201420558471U CN 204101677 U CN204101677 U CN 204101677U
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Abstract
A kind of cable digital display of the utility model path instrument of synchronously fixing a point relates to cable detection, is a kind of detection instrument for buried power cable insulation fault point.Comprise electromagnetic sensor, acoustic vibration sensor, data processor, range display and note amplifier, electromagnetic sensor and acoustic vibration sensor are connected with data processor respectively, electromagnetic sensor is delivered to data processor process being received the electromagnetic wave transmitted by cable radiation, and acoustic vibration sensor processes also delivering to data processor after the trouble spot seismic event transmitted by underground received; Data processor is connected with range display, carries out information mutual communication.By electromagnetic sensor and sound transducer, the electromagnetic wave signal received and seismic event are delivered to data processor to process, and the data message after process is shown by range display.
Description
Technical field
A kind of cable digital display of the utility model path instrument of synchronously fixing a point relates to cable detection, is a kind of detection instrument for buried power cable insulation fault point.
Background technology
When past is to failure cable built on stilts in cable duct fixed point, the chatter of full cable makes any fixed point path instrument feel simply helpless, and cannot judge the particular location of closure fault.Also cannot suppress the interference of 50Hz power frequency component in addition, there is very large fixed point blind area.
Utility model content
The purpose of this utility model provides a kind of cable digital display synchronously to fix a point path instrument for above-mentioned weak point, buried power cable insulation fault point and accurate detection cable burial path can be located fast, accurately, there is function singleness, location out of true to solve existing like product, there is the defect problems such as fixed point blind area.
The utility model cable digital display path instrument of synchronously fixing a point takes following technical scheme to realize:
Cable digital display path instrument of synchronously fixing a point comprises electromagnetic sensor, acoustic vibration sensor, data processor, range display and note amplifier, electromagnetic sensor and acoustic vibration sensor are connected with data processor respectively, electromagnetic sensor is delivered to data processor process being received the electromagnetic wave transmitted by cable radiation, and acoustic vibration sensor processes also delivering to data processor after the trouble spot seismic event transmitted by underground received; Data processor is connected with range display, carries out information mutual communication;
Amplification processor and filter processor is also provided with before data processor.
Described acoustic vibration sensor is connected with note amplifier, note amplifier is connected with earphone by detection instrument and fixed point/path function shift key, note amplifier amplifies the faintly seismic wave signal of acoustic vibration sensor pickup, import its size of headphone monitor into, coordinate display data, the pinpoint of range display.
Described sound transducer adopts commercially available sound transducer, and electromagnetic sensor adopts commercially available electromagnetic sensor.
Described range display adopts LED nixie display.
Data processor adopts 8 commercially available single-chip microcomputers.
Principle of work: the electromagnetic wave signal received and seismic event are delivered to data processor by electromagnetic sensor and sound transducer and processed by cable digital display path instrument of synchronously fixing a point, and are shown by range display by the data message after process.Note amplifier can amplify the faintly seismic wave signal of acoustic vibration sensor pickup, by its size of headphone monitor, coordinates screen data pinpoint.
Synchronously the fix a point fix-point method of path instrument of cable digital display comprises the steps:
1) when carrying out impulse high voltage electric discharge fixed point, electromagnetic sensor delivers to data processor after receiving the electromagnetic wave transmitted by cable radiation, through amplifying Shape correction, starting inner counter and starting working, namely starting to carry out distance transform;
2) when sound transducer receives the trouble spot seismic event transmitted by underground, this seismic signal is delivered to data processor and amplify shaping, produce counting interrupt signal, and the counting interrupt signal of generation is delivered to range display display final process result, and freeze display numeral, provide stable and observe;
Described result is fault distance;
3) repeat above-mentioned steps (1) and step (2) during second time impulsive discharge and refresh and showed data last time, and the faintly seismic wave signal of acoustic vibration sensor pickup is amplified by note amplifier, by its size of headphone monitor, range display is coordinated to show accurate fixed-point data.
Described fault distance calculates by the following method, because propagation velocity of electromagnetic wave is exceedingly fast, far above earth's surface acoustic wave propagation velocity, so can think that Method of Cable Trouble Point point breakdown time and receiver receive electromagnetic time point is synchronization.Start counting thus, until receive the vibrations sound signal of breakdown point.The aerial velocity of propagation V=340M/S of sound is known, and according to the propagation time difference of electromagnetic wave and sound wave, utilize formula I=TV, wherein I is fault distance, unit rice; T is unit second mistiming; V is the velocity of propagation of sound wave in surface layer or cable, and unit is meter per second, converses the fault distance of trouble spot to current location by data processing circuit.
Synchronously fix a point path instrument and fix-point method thereof of the utility model cable digital display uses the acoustic vibration sensor of special construction and low noise dedicated devices to make enlarge leadingly, substantially increases the sensitivity of instrument fixed point and path detection.In signal processing technology, by the distance between numerical monitor trouble spot and sensing probe, substantially eliminating blindness during fixed point.Realize quick, accurately location and cable burial path accurate detection.This digital display utilizes acoustic-electric synchronously to receive display technique with one-step site path instrument, effectively overcomes the fixed point difficult problem that the noise jamming of fixed point site environment causes.Especially the numerical monitor of fault distance eliminates operator and judges the analysis of complicated wave form, instead of the bigness scale range capability of flash tester to a great extent.For the failure cable that hundreds of rice is long, generally just can implement fixed point without bigness scale, it is efficient, quick, accurate really to achieve.
Accompanying drawing explanation
Below with reference to accompanying drawing, the utility model is described in further detail:
Fig. 1 is that the utility model cable digital display is synchronously fixed a point the principle of work schematic diagram of path instrument.
Embodiment
With reference to accompanying drawing 1, the utility model cable digital display path instrument of synchronously fixing a point comprises electromagnetic sensor, acoustic vibration sensor, data processor, range display and note amplifier, electromagnetic sensor and acoustic vibration sensor are connected with data processor respectively, electromagnetic sensor is delivered to data processor process being received the electromagnetic wave transmitted by cable radiation, and acoustic vibration sensor processes also delivering to data processor after the trouble spot seismic event transmitted by underground received; Data processor is connected with range display, carries out information mutual communication;
Amplification processor and filter processor is also provided with before data processor.
Described acoustic vibration sensor is connected with note amplifier, note amplifier is connected with earphone by detection instrument and fixed point/path function shift key, note amplifier amplifies the faintly seismic wave signal of acoustic vibration sensor pickup, import its size of headphone monitor into, coordinate display data, the pinpoint of range display.
Described sound transducer adopts commercially available sound transducer, and electromagnetic sensor adopts commercially available electromagnetic sensor.
Described range display adopts LED nixie display.
Data processor adopts 8 commercially available single-chip microcomputers.
Synchronously the fix a point fix-point method of path instrument of cable digital display comprises the steps:
1) when carrying out impulse high voltage electric discharge fixed point, electromagnetic sensor delivers to data processor after receiving the electromagnetic wave transmitted by cable radiation, through amplifying Shape correction, starting inner counter and starting working, namely starting to carry out distance transform;
2) when acoustic vibration sensor receives the trouble spot seismic event transmitted by underground, this seismic signal is delivered to data processor and amplify shaping, produce counting interrupt signal, and the counting interrupt signal of generation is delivered to range display display final process result, and freeze display numeral, provide stable and observe;
Described result is fault distance;
3) repeat above-mentioned steps (1) and step (2) during second time impulsive discharge and refresh and showed data last time, and the faintly seismic wave signal of acoustic vibration sensor pickup is amplified by note amplifier, by its size of headphone monitor, range display is coordinated to show accurate fixed-point data.
This digital display is as follows with the use-pattern of one-step site path instrument:
1. fix a point: when impacting with high pressure made by impulse high voltage generator to failure cable, (impulse high voltage amplitude is enough high, to ensure the abundant disruptive discharge in trouble spot), by the probe placement of acoustic vibration sensor in cable trace (or failure cable body) top, stir power switch, switch on power, the function conversion key of fixed point path instrument is arranged on " path ", on the one hand by headphone monitor seismic event, and viewing distance display screen on the other hand.When not hearing seismic event (audiometry point is too far away apart from trouble spot), every impulsive discharge once, the display screen of range display counts and refreshes once, each display completely measures 200/500.0 meter, above cable, along path, continuous mobile sensor is popped one's head in, until hear the seismic event sound (now showing apart from trouble spot within sight) of trouble spot.When the seismic event sound heard is enough strong, the display screen of range display will show fault distance number.Now just the probe of acoustic vibration sensor directly can be placed on corresponding position according to the distance number of display screen display.Move forward and backward the probe of acoustic vibration sensor at this place, find the minimum place of digital display value, be fault exact position herein.And this digital display value is also the locality roughly depth of burying (now in earphone, sound should be maximum, and the sound heard all shows synchronous with the refreshing of digital display) of cable at every turn.
2. seeking and survey path: now adding 15KHz amplitude modulation path signal source for surveying cable head-end, 15KHz probe is inserted at the input port of instrument, and perpendicular to ground, cable digital display path instrument function conversion key of synchronously fixing a point is arranged on " path " shelves, with the sound of headphone monitor 15KHz discontinuous wave.When probe is positioned at directly over cable, sound is minimum, is the cable buried underground below probe.What be this cable along the line burying each minimum sound point that direction leans out underground accurately buries path underground.
Claims (3)
1. a cable digital display is synchronously fixed a point path instrument, it is characterized in that: comprise electromagnetic sensor, acoustic vibration sensor, data processor, range display and note amplifier, electromagnetic sensor and acoustic vibration sensor are connected with data processor respectively, electromagnetic sensor is delivered to data processor process being received the electromagnetic wave transmitted by cable radiation, and acoustic vibration sensor processes also delivering to data processor after the trouble spot seismic event transmitted by underground received; Data processor is connected with range display, carries out information mutual communication.
2. cable digital display according to claim 1 is synchronously fixed a point path instrument, it is characterized in that: before data processor, be also provided with amplification processor and filter processor.
3. cable digital display according to claim 1 is synchronously fixed a point path instrument, it is characterized in that: described acoustic vibration sensor is connected with note amplifier, note amplifier is connected with earphone by detection instrument and fixed point/path function shift key, note amplifier amplifies the faintly seismic wave signal of acoustic vibration sensor pickup, import its size of headphone monitor into, coordinate display data, the pinpoint of range display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420558471.XU CN204101677U (en) | 2014-09-26 | 2014-09-26 | A kind of cable digital display is synchronously fixed a point path instrument |
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| CN201420558471.XU CN204101677U (en) | 2014-09-26 | 2014-09-26 | A kind of cable digital display is synchronously fixed a point path instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198894A (en) * | 2014-09-26 | 2014-12-10 | 国家电网公司 | Cable digital display synchronous fixed point path instrument and fixed point method thereof |
| CN108387815A (en) * | 2018-01-15 | 2018-08-10 | 大连理工大学 | A kind of test method using special wall line analyzer |
-
2014
- 2014-09-26 CN CN201420558471.XU patent/CN204101677U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198894A (en) * | 2014-09-26 | 2014-12-10 | 国家电网公司 | Cable digital display synchronous fixed point path instrument and fixed point method thereof |
| CN108387815A (en) * | 2018-01-15 | 2018-08-10 | 大连理工大学 | A kind of test method using special wall line analyzer |
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