CN106353643B - Resistance ratio electric cable failure detector - Google Patents
Resistance ratio electric cable failure detector Download PDFInfo
- Publication number
- CN106353643B CN106353643B CN201610984379.3A CN201610984379A CN106353643B CN 106353643 B CN106353643 B CN 106353643B CN 201610984379 A CN201610984379 A CN 201610984379A CN 106353643 B CN106353643 B CN 106353643B
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- Prior art keywords
- voltage
- sampler
- accuracy
- control unit
- loop control
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The present invention relates to a kind of resistance ratio electric cable failure detectors, comprising: cabinet has liquid crystal display, keyboard above cabinet；Voltage signal generator, high-accuracy voltage sampler, high-accuracy current sampler, signal amplifier, A/D converter, measurement loop control unit, CPU processor, data storage, display unit are internally integrated in cabinet；Wherein, measurement loop control unit is connected with high-accuracy voltage sampler, high-accuracy voltage sampler is connected with signal amplifier, signal amplifier is connected with A/D converter, high-accuracy current sampler is connected with signal amplifier, signal amplifier is connected with A/D converter, and CPU processor is connected with voltage signal generator, measurement loop control unit, A/D converter, data storage, display unit, keyboard respectively, and display unit is connected with liquid crystal display.The present invention is not influenced by factors such as the length of cable, capacity, type, running environment, can accurately test out fault point distance, and instrument performance is stable, easy to operate.
Description
Technical field:
The present invention relates to technical field of electric power, in particular to a kind of resistance ratio electric cable failure detector.
Background technique:
In power equipment, the conveying of the unimpeded and electric power of wire communication depends on the normal operation of cable run.Once
Obstacle occurs for route, finds failure not in time and is excluded rapidly, will result in very huge economic loss and undesirable society
It influences.Thus, electric cable failure detector is the important tool for safeguarding various cables.Electric cable failure detector is a set of comprehensive
Electric cable failure detector device, can the failures such as ground connection, short circuit, broken string, poor contact to cable carry out test failure point distance,
It can be used as in the calibration to cable length.But with the development in city, cable length and capacity are directly proportional to the development in city, when super
When high resistive fault, leakage failure occur for length, large-sized cable, to Method of Cable Trouble Point apart from extremely difficult；Even because of failure electricity
The factors such as cable type, cable fault property, running environment can not measure Method of Cable Trouble Point distance.
Summary of the invention:
The present invention provides a kind of resistance ratio cable fault test to overcome drawbacks described above existing in the prior art
Instrument.
To solve the above problems, resistance ratio electric cable failure detector proposed by the present invention, comprising: cabinet, the cabinet
There are liquid crystal display, keyboard above；Voltage signal generator, high-accuracy voltage sampler, high-precision cipher telegram are internally integrated in cabinet
Flow sampler, signal amplifier, A/D converter, measurement loop control unit, CPU processor, data storage, display unit；Its
In, measurement loop control unit is connected with high-accuracy voltage sampler, and high-accuracy voltage sampler is connected with signal amplifier, signal
Amplifier is connected with A/D converter, and high-accuracy current sampler is connected with signal amplifier, signal amplifier and A/D converter
It is connected, CPU processor is single with voltage signal generator, measurement loop control unit, A/D converter, data storage, display respectively
Member, keyboard are connected, and display unit is connected with liquid crystal display.
Preferably, the resistance ratio electric cable failure detector further includes that voltage signal generator, high-accuracy voltage take
Sample device, high-accuracy current sampler export test voltage signal in a cable wherein good phase line by voltage signal generator
In failure phase line, this two phase lines end is connected into short circuit.
Preferably, the resistance ratio electric cable failure detector, voltage, current sampler and measurement loop control unit are
Voltage bridge formula balancing circuitry or resistance test circuit.
Preferably, the resistance ratio electric cable failure detector, test scope: 10V~110KV cable.
Preferably, the resistance ratio electric cable failure detector, instrument power supply system alternating current-direct current and included battery supply
Electricity.
Preferably, the resistance ratio electric cable failure detector, voltage signal generator can also be constant current source generator.
Preferably, the resistance ratio electric cable failure detector, the sliding end of voltage or current signal input potentiometer,
Sliding end is adjusted to be allowed to balance with the both ends of test failure cable.
The present invention measures loop control unit according to CPU after voltage signal generator is to one test signal of cable fault
Processor instruction selects circuit to get test signal for high-accuracy voltage sampler, high-accuracy current sampler, will test signal
It is conveyed to signal amplifier to amplify, then exports and give A/D converter change data, data give input CPU processor analysis, will
Test data is saved in data storage, while being exported to display unit, in liquid crystal display screen display.
The principles of science based on the technical program:
Coaxial cable A, B, C phase line resistance is almost equal, and error can be ignored, faulty by not having in coaxial cable
Phase line (hereinafter referred to as: relief cable) is connected with failure phase line end, a voltage is added between relief cable and failure phase line, just
HaveWherein, L, R1 and R2 can measure to obtain, such as figure two, so
The present invention: calculating failure cable phase line resistance ratio, converses Method of Cable Trouble Point distance, i.e. resistance ratio cable event
Hinder tester.
The present invention has the advantages that compared with prior art and advantage:
The present invention converses Method of Cable Trouble Point distance, and this measurement according to failure cable phase line resistance ratio is calculated
Method is not influenced by factors such as the length of cable, capacity, type, running environment, can accurately test out fault point distance, instrument
Performance is stable, easy to operate, to electricity when can effectively solve because of overlength degree, large-sized cable generation high resistive fault, leakage failure
Cable fault point distance measurement causes difficulty and because the factors such as failure type of cable, cable fault property, running environment can not be measured
Method of Cable Trouble Point apart from the problems such as.
Detailed description of the invention:
Fig. 1 is resistance ratio electric cable failure detector schematic diagram of the present invention；
Fig. 2 is equivalent measuring test chart of the present invention.
Explanation: 1, data storage is numbered in figure；2, keyboard；3, liquid crystal display；4, voltage signal generator；5,CPU
Processor；6, display unit；7, high-accuracy voltage sampler；8, signal amplifier；9, high-accuracy current sampler；10, it measures
Loop control unit；11, A/D converter.
Specific embodiment:
With reference to the accompanying drawing and specific example, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate this
It invents rather than limits the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention various
The modification of equivalent form falls within the application range as defined in the appended claims.
As shown in Figure 1, resistance ratio electric cable failure detector, including cabinet, have above the cabinet liquid crystal display 3,
Keyboard 2 is internally integrated voltage signal generator 4, high-accuracy voltage sampler 7, high-accuracy current sampler 9, signal in cabinet
Amplifier 8, A/D converter 11, measurement loop control unit 10, CPU processor 5, data storage 1；Tester passes through display key
Parameter inputs to CPU processor 5 before disk 2 sets test, and CPU processor 5 sends instructions to the control of voltage signal generator 4
Part, voltage signal generator 4 export a test voltage signal to failure cable, and CPU processor 5 controls measure back simultaneously
Road controller 10 needs to select different test loops according to calculating, each test loop by high-accuracy voltage sampler 7,
The data that high-accuracy current sampler 9 measures, the amplification test signal of input signal amplifier 8, input a/d converter 11, conversion
Test result is passed through at CPU processor 5 is exported after digital signal after CPU processor 5 is handled according to measuring and calculation mathematical expression
Display unit 6 shows on liquid crystal display 3, meanwhile, test result data will be saved in data storage 1, wait tester
Member's call instruction.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (4)
1. resistance ratio electric cable failure detector, which is characterized in that including cabinet, there is liquid crystal display, key above the cabinet
Disk；Be internally integrated in cabinet voltage signal generator, high-accuracy voltage sampler, high-accuracy current sampler, signal amplifier,
A/D converter, measurement loop control unit, CPU processor, data storage, display unit；
Wherein, measurement loop control unit is connected with high-accuracy voltage sampler, high-accuracy voltage sampler and signal amplifier phase
Even, signal amplifier is connected with A/D converter, and high-accuracy current sampler is connected with signal amplifier, signal amplifier and A/D
Converter be connected, CPU processor respectively with voltage signal generator, measurement loop control unit, A/D converter, data storage,
Display unit, keyboard are connected, and display unit is connected with liquid crystal display；
The voltage signal generator, for input test after one good phase line is connect with the end short circuit of failure phase line into cable
Voltage signal, and voltage signal generator is using the power supply system of alternating current-direct current and included storage battery power supply；
On the one hand the high-accuracy voltage sampler, high-accuracy current sampler constitute voltage bridge with measurement loop control unit flat
Weigh circuit, on the other hand constitutes resistance test circuit with measurement loop control unit, needs CPU processor control measurement according to calculating
Loop control unit selects different test loops；
User sends test instruction to CPU processor by keyboard, and CPU processor controls voltage signal generator output signal
Test signal is inputed to load by size, meanwhile, CPU processor passes through height according to requirement control measurement loop control unit is calculated
Accurate voltage sampler, high-accuracy current sampler are by measuring signal input signal amplifier, and input A/D turns after signal is amplified
Parallel operation is converted into digital signal and exports test result to display unit and liquid crystal after digital signal inputs CPU processor calculating
Display screen, while measurement result is saved in data storage.
2. resistance ratio electric cable failure detector according to claim 1, which is characterized in that test scope: 10V~
110KV cable.
3. resistance ratio electric cable failure detector according to claim 1, which is characterized in that voltage signal generator can be adopted
With constant current source generator.
4. resistance ratio electric cable failure detector according to claim 1, which is characterized in that voltage or current signal input
The sliding end of potentiometer adjusts sliding end and is allowed to balance with the both ends of test failure cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610984379.3A CN106353643B (en) | 2016-11-09 | 2016-11-09 | Resistance ratio electric cable failure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610984379.3A CN106353643B (en) | 2016-11-09 | 2016-11-09 | Resistance ratio electric cable failure detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106353643A CN106353643A (en) | 2017-01-25 |
| CN106353643B true CN106353643B (en) | 2019-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610984379.3A Active CN106353643B (en) | 2016-11-09 | 2016-11-09 | Resistance ratio electric cable failure detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN106353643B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594080A (en) * | 2018-05-30 | 2018-09-28 | 武汉国鼎科技有限公司 | The full-automatic online navigation positioning system of cable fault |
| CN112415433A (en) * | 2019-08-21 | 2021-02-26 | 华东师范大学 | Long-lead short-circuit fault point positioning device and method |
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|---|---|---|---|---|
| CN2325783Y (en) * | 1998-05-08 | 1999-06-23 | 李全用 | Comprehensive type instrument for locating faults in communication cable |
| CN102096023A (en) * | 2010-12-17 | 2011-06-15 | 西安四方机电有限责任公司 | Device and method for testing power cable fault |
| CN202649380U (en) * | 2012-05-30 | 2013-01-02 | 上海电力学院 | Digital cable insulation fault automatic locator |
| CN202758035U (en) * | 2012-08-12 | 2013-02-27 | 湖北仪天成电力设备有限公司 | Cable fault tester |
| CN105137292A (en) * | 2015-09-22 | 2015-12-09 | 国家电网公司 | Direct-current signal intelligent acquiring device used for high-voltage cable fault positioning |
| CN105785228A (en) * | 2016-04-14 | 2016-07-20 | 无锡南理工科技发展有限公司 | Multifunctional communication cable fault tester |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02231580A (en) * | 1989-03-03 | 1990-09-13 | Fuji Electric Co Ltd | Method for surveying accident point of three-phase cable |
| JPH0830726B2 (en) * | 1990-05-08 | 1996-03-27 | 東京電力株式会社 | Insulation deterioration telemetry device for cable lines |
-
2016
- 2016-11-09 CN CN201610984379.3A patent/CN106353643B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2325783Y (en) * | 1998-05-08 | 1999-06-23 | 李全用 | Comprehensive type instrument for locating faults in communication cable |
| CN102096023A (en) * | 2010-12-17 | 2011-06-15 | 西安四方机电有限责任公司 | Device and method for testing power cable fault |
| CN202649380U (en) * | 2012-05-30 | 2013-01-02 | 上海电力学院 | Digital cable insulation fault automatic locator |
| CN202758035U (en) * | 2012-08-12 | 2013-02-27 | 湖北仪天成电力设备有限公司 | Cable fault tester |
| CN105137292A (en) * | 2015-09-22 | 2015-12-09 | 国家电网公司 | Direct-current signal intelligent acquiring device used for high-voltage cable fault positioning |
| CN105785228A (en) * | 2016-04-14 | 2016-07-20 | 无锡南理工科技发展有限公司 | Multifunctional communication cable fault tester |
Non-Patent Citations (1)
| Title |
|---|
| 基于电桥法电缆绝缘故障自动测距的研究;桂媛 等;《电气应用》;20151231;第434-438页 |
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| CN106353643A (en) | 2017-01-25 |
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Effective date of registration: 20200714 Address after: Room b-004, 12 / F, unit 1, building 1, Qingshan Torch Building, No. 54, metallurgy Avenue, Qingshan District, Wuhan City, Hubei Province Patentee after: WUHAN GUODING TECHNOLOGY Co.,Ltd. Address before: Yao town 430322 Hubei province Wuhan city Huangpi District Yao Ji Cun Yao Jia Da Wan No. 29 Patentee before: Lei Xijun |