CN105699832A - Cable checking and grouping method - Google Patents

Cable checking and grouping method Download PDF

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Publication number
CN105699832A
CN105699832A CN201410704399.1A CN201410704399A CN105699832A CN 105699832 A CN105699832 A CN 105699832A CN 201410704399 A CN201410704399 A CN 201410704399A CN 105699832 A CN105699832 A CN 105699832A
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CN
China
Prior art keywords
cable
core
test pencil
resistance
grouping method
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410704399.1A
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Chinese (zh)
Inventor
苏云鹏
杨志新
全海潮
王娜
张辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Original Assignee
Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd filed Critical Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority to CN201410704399.1A priority Critical patent/CN105699832A/en
Publication of CN105699832A publication Critical patent/CN105699832A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a cable checking and grouping method. On one hand, the cable checking and grouping method is expanded to dual selection of resistance values and voltage values, and the application range is wider; on the other hand, test results are visually displayed, cables in the processes of checking and grouping are marked, analyzed, and ranked in time, the number of operation personnel is small, multiple cables can be simultaneously tested, the work efficiency is high, and the continuity and accuracy of checking and grouping operation can be realized in time.

Description

A kind of cable examination grouping method
Technical field
The present invention relates to electric power facility checking method technical field, particularly relate to a kind of cable examination grouping method。
Background technology
Transformer station electric power facility install and management course work in, the examination after cable drum with marshalling be always up the work taken time and effort because the number of cables in each work area just can reach hundreds of even thousands of more than。The method of traditional cable examination marshalling mainly has following several: one is utilize circuit tester, transmitter receiver to carry out both sides to exchange, two is according to cable core numbering verification, but the former staff is many, efficiency is low, length consuming time, and there is limitation in the latter, it is impossible to the cable unclear without core or core to be realized examination marshalling。
The Chinese patent that application number is 89211732.X relates to a kind of cable checker, has monitoring part and school line part, is made up of diode, light emitting diode, power supply, current relay, tone generator and binding post etc. respectively。Which overcoming loaded down with trivial details time-consuming shortcoming during the examination marshalling of current domestic cable core, reasonable in design, simple in construction, easy to operate, time saving and energy saving, rapidly accurately, and cost is low, and the suitability is strong, has application value and economic results in society preferably。
Application number be 201220136044.3 Chinese patent relate to a kind of secondary cable correcting line machine, including secondary cable, digital multimeter, internal circuit board on secondary cable correcting line machine housing, circuit board is provided with resistance, common port terminal, the cable shield two of secondary cable right-hand member connects the positive pole of digital multimeter, terminal in the negative pole correspondence connecting secondary cable checker of numeral universal meter, secondary cable correcting line machine makes the precision height of correcting line machine, good stability, noise is low, temperature coefficient is little, saves the operating personnel of engineering, improves work efficiency。
But all there is limitation in such scheme, core during test is put value and is confined to resistance value on the one hand, and the scope of application is wideless, directly perceived not for the display of test result on the other hand, and for the cable in examination grouping procedures can not spectroscopic analysis in time, be not easy to examination and organize into groups the seriality of work。
Summary of the invention
It is an object of the invention to provide a kind of cable examination grouping method, it utilizes simple circuit theory, and operator are few, surveys multi-cable simultaneously, and work efficiency is high, in time test result can be displayed, compares, analyze, it is achieved the seriality of examination marshalling work。
Be the technical scheme is that a kind of cable examination grouping method by realizing the purpose of the present invention, comprised the steps:
1) after cable drum completes, the core quantity at statistics cable group two ends, it is ensured that two ends are consistent, as inconsistent, check along unwrapping wire track;
2), after determining that two ends core quantity is equivalent, strip out shielding layers of copper from cable two ends respectively, be marked as common port;To the cable not having screen layer, choose the ground potential points at cable two ends as common port;
3) choose the resistance bridge of multiple-channel output, the multiple-channel output mouth of resistance bridge is connected with the multichannel core of cable one end respectively, and to delivery outlet according to output resistance size number consecutively, core is carried out reference numeral simultaneously;
4) the digital display type circuit tester that range is suitable is chosen, and it is adjusted to corresponding resistance grade, test pencil one end overlap joint common port, the test pencil other end overlaps the other end of each core respectively, resistance value will be obtained by measurement and carry out size sequence, and carry out label according to delivery outlet numbering before, thus the label marshalling completing cable core two ends is consistent;
5) for step 3), the voltage source of multiple-channel output can be chosen, its multiple-channel output mouth is connected with the multichannel core of cable one end respectively, and delivery outlet is exported size number consecutively according to output voltage, core be carried out reference numeral simultaneously;
6) for step 4); display controller can be chosen and carry out the examination marshalling of cable core; the input of display controller is drawn and is measured test pencil; test pencil one end overlap joint common port; the test pencil other end overlaps the other end of each core respectively, and test pencil introduces signal through analog digital conversion and protection circuit, enters processor and is analyzed judging; and finally show over the display, thus complete the generic reference numeral marshalling at cable core two ends。
Described protection circuit is current-limiting protection circuit, including electric current control chip。
Described processor includes singlechip chip。
Described analog digital conversion adopts 15 A/D analog-digital converters。
The present invention is when starting to measure, the loading output of signal is carried out by resistance bridge or voltage source, and the one end measuring electroprobe is connected shielding line, the electroprobe other end puts survey n group core respectively, the signal magnitude being loaded due to each group of core is different, the signal that measuring terminals detects is also different, the size sequence according to detection signal, namely may determine that and measures the core label that end is corresponding。Common port in the present invention, is as the zero point measured, represents with shielding line or earth potential。When measuring, by many groups of cable core, being set as n group, connect the multiple-channel output mouth of the amount of putting end, and the delivery outlet that correspondence connects respectively, core one end is carried out generic reference numeral, for shielding line for No. 0 line, then core label starts to n from 1。
Protection circuit in the present invention is current-limiting protection circuit, including electric current control chip UC3842, in order to prevent the big electric current of interference or the breakdown current impact on module of burst, analog digital conversion adopts 15 A/D analog-digital converters, coordinate with processor and be controlled processing, transmission and measurement error can be made to be reduced to 1.5%, measure wide ranges, accuracy of measurement can reach 0.5 grade, and store conversion value transmission to the processor of display controller carries out and compare, processor includes singlechip chip, MCS-51 series of programmable microcontroller can be preferably, adopt the high-precision crystal oscillator of 12MHz, there is relatively stabilizing clock frequency, reduce measurement error。Single-chip microcomputer utilizes the signal of outer middle fracture monitoring analog digital conversion output, with latter aspect, the signal received is converted to general-purpose digital signal, it is transferred to the display of external connection, on the other hand digital signal is stored in internal storage, after treating one group of data storage, perform the interruption subroutine of encapsulation in single-chip microcomputer, carry out data to compare, and comparative result is finally shown over the display, display is chosen as the liquid crystal matrix formula of 128 × 64 dot matrix, as adopted display lcd l2864, show for data, accelerate the transfer rate of data. in addition, data interaction is carried out with host computer in order to convenient, expansible 485 EBIs of display end, select the MAX485 type bus converter of MAXIM company, each through SPI interface communication between each module。
Cable is checked grouping method and is extended for the double selection of resistance value and magnitude of voltage by one aspect of the present invention, the scope of application is wider, on the other hand for the display directly perceived of test result, and the cable in examination grouping procedures is carried out mark, analysis in time, sorted, operator are few, surveying multi-cable, work efficiency is high simultaneously, can realize seriality and the accuracy of examination marshalling work in time。
Accompanying drawing explanation
Fig. 1 is the structure application drawing of this method embodiment one。
Fig. 2 is the structure application drawing of this method embodiment two。
Fig. 3 is the measuring principle figure of this method protection circuit。
Detailed description of the invention
Embodiment one
As shown in Figure 1, Figure 3, a kind of cable examination grouping method, comprise the steps:
1) after cable drum completes, the core quantity at statistics cable group two ends, it is ensured that two ends are consistent, as inconsistent, check along unwrapping wire track;
2), after determining that two ends core quantity is equivalent, strip out shielding layers of copper from cable two ends respectively, be marked as common port;To the cable not having screen layer, choose the ground potential points at cable two ends as common port;
3) choose the voltage source 1 of multiple-channel output, its multiple-channel output mouth is connected with the multichannel core of cable one end respectively, and delivery outlet is exported size number consecutively according to output voltage, core is carried out reference numeral simultaneously;
4) the digital display type circuit tester that range is suitable is chosen, and it is adjusted to corresponding resistance grade, test pencil one end overlap joint common port, the test pencil other end overlaps the other end of each core respectively, resistance value will be obtained by measurement and carry out size sequence, and carry out label according to delivery outlet numbering before, thus the label marshalling completing cable core two ends is consistent;
In the present embodiment, display controller can be chosen and carry out the examination marshalling of cable core, the input of display controller is drawn and is measured test pencil 2, test pencil one end overlap joint common port, the test pencil other end overlaps the other end of each core respectively, test pencil introduces signal through analog digital conversion 3 and protection circuit 4, enter processor 5 to be analyzed judging, and finally show on the display 6, thus completing the generic reference numeral marshalling at cable core two ends, wherein, protection circuit is current-limiting protection circuit, including electric current control chip UC3842, in order to prevent the big electric current of interference or the breakdown current impact on module of burst, when output circuit is short-circuit or crosses stream, primary side current of transformer increases, increase drops in R3 both end voltage, 3. foot voltage raises, UC3842 6. foot output duty cycle is gradually increased, 3. when foot voltage exceedes rated voltage, UC3842 closes without output;Analog digital conversion adopts 15 A/D analog-digital converters, coordinate with processor and be controlled processing, transmission and measurement error can being made to be reduced to 1.5%, measure wide ranges, accuracy of measurement can reach 0.5 grade, and store conversion value transmission to the processor of display controller carries out and compare, processor includes singlechip chip, it may be preferable to for MCS-51 series of programmable microcontroller, the employing high-precision crystal oscillator of 12MHz, there is relatively stabilizing clock frequency, reduce measurement error。Single-chip microcomputer utilizes the signal of outer middle fracture monitoring analog digital conversion output, with latter aspect, the signal received is converted to general-purpose digital signal, it is transferred to the display of external connection, on the other hand digital signal is stored in internal storage, after treating one group of data storage, perform the interruption subroutine of encapsulation in single-chip microcomputer, carry out data to compare, and comparative result is finally shown over the display, display is chosen as the liquid crystal matrix formula of 128 × 64 dot matrix, as adopted display lcd l2864, show for data, accelerate the transfer rate of data. in addition, data interaction is carried out with host computer in order to convenient, expansible 485 EBIs of display end, select the MAX485 type bus converter of MAXIM company, each through SPI interface communication between each module。
Common port 7 in the present invention, is as the zero point measured, represents with shielding line or earth potential。When measuring, by many groups of cable core, being set as n group, connect the multiple-channel output mouth of the amount of putting end, and the delivery outlet that correspondence connects respectively, core one end is carried out generic reference numeral, for shielding line for No. 0 line, then core label starts to n from 1。In the present embodiment, can being chosen to be the desirable 1.5V of U, U by unified for the single normal voltage in voltage source, when shielding line is common terminal, between Line 1 core and the common terminal of numbering 1, resistance is 1.5V;No. 2 resistance between core and common terminal of numbering 2 are 3V;No. 3 resistance between core and common terminal of numbering 3 are 4.5V, and the amount of putting arrives N*1.5V by that analogy, measure respective value at measurement end and are the numbering of correspondence。
When selecting voltage signal, resistance pressure-dividing network can be set between test pencil and analog-to-digital conversion module, in order to voltage signal to be converted to the electric pressure that analog-to-digital conversion module may identify which, it is easy to export to display end, display end can show the magnitude of voltage or resistance value currently surveyed, it is possible to preserves the measurement numerical value that point is surveyed every time, after a wheel measurement, this group is tested data be ranked up, thus demonstrating the core number of correspondence。Owing to there is line resistance and measurement error, detection signal possibility can not follow strictly the integral multiple of U, but only according to the size sequence of detection signal, need to namely may determine that and measure the core label that end is corresponding。
Embodiment two
As shown in Figure 2 and Figure 3, a kind of cable examination grouping method, comprise the steps:
1) after cable drum completes, the core quantity at statistics cable group two ends, it is ensured that two ends are consistent, as inconsistent, check along unwrapping wire track;
2), after determining that two ends core quantity is equivalent, strip out shielding layers of copper from cable two ends respectively, be marked as common port;To the cable not having screen layer, choose the ground potential points at cable two ends as common port;
3) choose the resistance bridge 8 of multiple-channel output, the multiple-channel output mouth of resistance bridge is connected with the multichannel core of cable one end respectively, and to delivery outlet according to output resistance size number consecutively, core is carried out reference numeral simultaneously;
4) the digital display type circuit tester that range is suitable is chosen, and it is adjusted to corresponding resistance grade, test pencil one end overlap joint common port, the test pencil other end overlaps the other end of each core respectively, resistance value will be obtained by measurement and carry out size sequence, and carry out label according to delivery outlet numbering before, thus the label marshalling completing cable core two ends is consistent;
In the present embodiment; display controller can be chosen and carry out the examination marshalling of cable core; the input of display controller is drawn and is measured test pencil; test pencil one end overlap joint common port; the test pencil other end overlaps the other end of each core respectively, and test pencil introduces signal through analog digital conversion and protection circuit, enters processor and is analyzed judging; and finally show over the display, thus complete the generic reference numeral marshalling at cable core two ends。
Common port in the present invention, is as the zero point measured, represents with shielding line or earth potential。When measuring, by many groups of cable core, being set as n group, connect the multiple-channel output mouth of the amount of putting end, and the delivery outlet that correspondence connects respectively, core one end is carried out generic reference numeral, for shielding line for No. 0 line, then core label starts to n from 1。In the present embodiment, can being chosen to be desirable 100 Ω of R, R by unified for the measuring resistance in resistance bridge, when shielding line is common terminal, between Line 1 core and the common terminal of numbering 1, resistance is 100 Ω;No. 2 resistance between core and common terminal of numbering 2 are 200 Ω;No. 3 resistance between core and common terminal of numbering 3 are 300 Ω, and the amount of putting arrives N*100 Ω by that analogy, measure respective value at measurement end and are the numbering of correspondence。Owing to there is line resistance and measurement error, the detection signal possibility of test side can not follow strictly the integral multiple of R, but only according to the size sequence of detection signal, need to namely may determine that and measure the core label that end is corresponding。

Claims (4)

1. a cable examination grouping method, it is characterised in that: comprise the steps:
After cable drum completes, the core quantity at statistics cable group two ends, it is ensured that two ends are consistent, as inconsistent, check along unwrapping wire track;
After determining that two ends core quantity is equivalent, strip out shielding layers of copper from cable two ends respectively, be marked as common port;To the cable not having screen layer, choose the ground potential points at cable two ends as common port;
Choose the resistance bridge of multiple-channel output, the multiple-channel output mouth of resistance bridge is connected with the multichannel core of cable one end respectively, and to delivery outlet according to output resistance size number consecutively, core is carried out reference numeral simultaneously;
Choose the digital display type circuit tester that range is suitable, and it is adjusted to corresponding resistance grade, test pencil one end overlap joint common port, the test pencil other end overlaps the other end of each core respectively, resistance value will be obtained by measurement and carry out size sequence, and carry out label according to delivery outlet numbering before, thus the label marshalling completing cable core two ends is consistent;
For step 3), the voltage source of multiple-channel output can be chosen, its multiple-channel output mouth is connected with the multichannel core of cable one end respectively, and delivery outlet is exported size number consecutively according to output voltage, core be carried out reference numeral simultaneously;
For step 4); display controller can be chosen and carry out the examination marshalling of cable core; the input of display controller is drawn and is measured test pencil; test pencil one end overlap joint common port; the test pencil other end overlaps the other end of each core respectively, and test pencil introduces signal through analog digital conversion and protection circuit, enters processor and is analyzed judging; and finally show over the display, thus complete the generic reference numeral marshalling at cable core two ends。
2. cable examination grouping method as claimed in claim 1, it is characterised in that: described protection circuit is current-limiting protection circuit, including electric current control chip。
3. cable examination grouping method as claimed in claim 1, it is characterised in that: described processor includes singlechip chip。
4. cable examination grouping method as claimed in claim 1, it is characterised in that: described analog digital conversion adopts 15 A/D analog-digital converters。
CN201410704399.1A 2014-11-28 2014-11-28 Cable checking and grouping method Pending CN105699832A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107015098A (en) * 2017-04-28 2017-08-04 国网河南省电力公司安阳供电公司 Cable branch instrument
CN107271831A (en) * 2017-05-31 2017-10-20 国家电网公司 A kind of novel transformer substation secondary cable alignment device and method
CN109738787A (en) * 2018-12-28 2019-05-10 上海新纪元机器人有限公司 A kind of cable recognition methods and system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2057514U (en) * 1989-10-24 1990-05-23 吴庆苏 Apparatus for calibrating cables
CN2200188Y (en) * 1994-05-30 1995-06-07 李鸿清 Quick-acting line fault test meter
CN201532437U (en) * 2009-11-13 2010-07-21 徐天锡 Cable number checking and phase checking device
CN202404191U (en) * 2012-01-19 2012-08-29 北京市电力公司 Cable checking device
CN202583377U (en) * 2012-03-31 2012-12-05 辽宁省电力有限公司盘锦供电公司 Secondary cable wire corrector
CN103033720A (en) * 2012-12-09 2013-04-10 太原理工大学 Multi-core cable long distance distinguishing method
CN203929955U (en) * 2014-05-28 2014-11-05 国家电网公司 A kind of secondary circuit control cables core verifying unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2057514U (en) * 1989-10-24 1990-05-23 吴庆苏 Apparatus for calibrating cables
CN2200188Y (en) * 1994-05-30 1995-06-07 李鸿清 Quick-acting line fault test meter
CN201532437U (en) * 2009-11-13 2010-07-21 徐天锡 Cable number checking and phase checking device
CN202404191U (en) * 2012-01-19 2012-08-29 北京市电力公司 Cable checking device
CN202583377U (en) * 2012-03-31 2012-12-05 辽宁省电力有限公司盘锦供电公司 Secondary cable wire corrector
CN103033720A (en) * 2012-12-09 2013-04-10 太原理工大学 Multi-core cable long distance distinguishing method
CN203929955U (en) * 2014-05-28 2014-11-05 国家电网公司 A kind of secondary circuit control cables core verifying unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107015098A (en) * 2017-04-28 2017-08-04 国网河南省电力公司安阳供电公司 Cable branch instrument
CN107271831A (en) * 2017-05-31 2017-10-20 国家电网公司 A kind of novel transformer substation secondary cable alignment device and method
CN107271831B (en) * 2017-05-31 2020-06-19 国家电网公司 Transformer substation secondary cable alignment device and method
CN109738787A (en) * 2018-12-28 2019-05-10 上海新纪元机器人有限公司 A kind of cable recognition methods and system

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