CN101937037A - Device for automatically testing performance of cable bunch - Google Patents
Device for automatically testing performance of cable bunch Download PDFInfo
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- CN101937037A CN101937037A CN2009100724233A CN200910072423A CN101937037A CN 101937037 A CN101937037 A CN 101937037A CN 2009100724233 A CN2009100724233 A CN 2009100724233A CN 200910072423 A CN200910072423 A CN 200910072423A CN 101937037 A CN101937037 A CN 101937037A
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Abstract
The invention discloses a device for automatically testing the performance of a cable bunch, which relates to a cable bunch performance testing device and solves the problems that the traditional cable bunch performance testing method is inefficient and incapable of detecting misconnection, over-connection and poor contact. A control interface board in the device is used for controlling a measuring interface board to sequentially connect each connector at one end of a cable bunch to be measured and each connector at the other end to two power output ends of an excitation power module respectively, controlling a voltage signal output by the excitation power module and detecting the voltage and the current between two terminals connected to a measuring circuit so as to obtain the resistance value of a lead wire to be measured; a measuring structure board comprises a measuring interface and a relay array and is used for selecting and switching a measured port; and the excitation power module comprises a high-voltage direct-current power supply, a low-voltage direct-current power supply and a constant-current direct-current power supply and is used for providing a power signal for measurement. The device is applicable to the performance testing of a multi-core cable bunch.
Description
Technical field
The present invention relates to the bunch of cables performance testing device.
Background technology
Bunch of cables, be commonly used, important electric connecting part on the existing various electrical equipments, be responsible for transmitting the effect of power supply, control signal and various electric informations, in the bunch of cables every lead whether correctly be connected with two terminal adapters, the size of the resistance of every lead, every lead and connector probe contact whether good or the like bunch of cables performance parameter, all influence the serviceability of bunch of cables, and directly have influence on the serviceability and the reliability of whole device, system.
Because distinct device needs different bunchs of cables, the tieing at the connected mode of lead and bunch of cables two ends is all inequality in the different bunchs of cables, have detection method now to the quality of bunch of cables, generally be by manually detecting, the general traditional poor efficiency testing tool such as megohmmeter and multimeter that adopts detects, and this monitoring method efficient is low; Can only the detection path state, problem such as be difficult in the bunch of cables of tens cores, hundreds of core even several thousand cores and detect misconnection, connect more, more can't detect the problem of loose contact, and detect the misconnection not come out, connect and the problem of loose contact more, all be the major accident that can cause device or system can't operate as normal even burn.
Summary of the invention
Exist efficient low and can not detect misconnection, connect and the problem of loose contact more in the existing method of testing to bunch of cables in order to solve, the present invention proposes a kind of bunch of cables performance automatic test device.
Bunch of cables performance automatic test device, it comprises the excitation power supply module, control survey plate and measurement interface board, the control survey plate comprises control circuit, signal conditioning circuit, A/D change-over circuit and control address decoding scheme, the measurement address signal output terminal of control circuit connects the address signal input end of control address decoding scheme, the power control signal output terminal of control circuit connects the signal input end of excitation power supply module, two excitation power supply signal output parts of excitation power supply module connect two excitation power supply signal input parts of test interface plate, the input end of analog signal of A/D change-over circuit connects the signal output part of signal conditioning circuit, the digital signal output end of described A/D change-over circuit connects the input end of analog signal of control circuit, the signal input part of described signal conditioning circuit connects the measuring-signal output terminal of measuring interface board, described measurement interface board comprises bunch of cables head end test interface, bunch of cables tag end test interface, relay array, simulation multiplexer, relay drive circuit, multiplexer driver and interface board address decoding circuitry, wherein bunch of cables head end test interface is identical with the quantity of the connection terminal of bunch of cables tag end test interface, be respectively applied for the two ends that connect bunch of cables to be measured, corresponding connection of terminals in the input end of relay array and bunch of cables head end test interface and the bunch of cables tag end test interface, a plurality of signal input output ends of simulation multiplexer connect the measuring-signal input/output terminal of relay array, the signal output part of described simulation multiplexer is for measuring the measuring-signal output terminal of interface board, the drive signal output terminal of the signal input end connection multiplexing device driver of described simulation multiplexer, the measurement address signal output terminal of the signal input end connecting interface plate address decoding circuitry of described multiplexer driver, the relay address signal output terminal of described interface board address decoding circuitry connects the signal input end of relay drive circuit, and the control signal output ends of described relay drive circuit connects the signal input end of relay array.
Bunch of cables performance automatic test device of the present invention, can be after the bunch of cables manufacturing be finished, automatically to the correctness of the connection of the lead in the bunch of cables and connect the reliability that contacts between resistance, lead and the interface unit and detect, and obtain more lead in the bunch of cables connects, misses, misconnection, open circuit and the position of the lead of fault such as short circuit.
Description of drawings
Fig. 1 is the electrical block diagram of embodiment one described bunch of cables performance automatic test device.Fig. 2 is when adopting embodiment one described bunch of cables performance automatic test device to test, the circuit theory synoptic diagram of excitation power supply module 3 and tested lead 30.Fig. 3 is the electrical block diagram of embodiment two described bunch of cables performance automatic test devices.Fig. 4 is the electrical block diagram of the constant current source in the excitation power supply module in the embodiment three described bunch of cables performance automatic test devices.
Embodiment
Embodiment one: present embodiment is described referring to Fig. 1.The described bunch of cables performance automatic test of present embodiment device comprises excitation power supply module 3, control survey plate 1 and measurement interface board 2,
Control interface board comprises control circuit 11, signal conditioning circuit 13, A/D change-over circuit 12 and control address decoding scheme 14, the measurement address signal output terminal of control circuit 11 connects the address signal input end of control address decoding scheme 14, the power control signal output terminal of control circuit 11 connects the signal input end of excitation power supply module 3, two excitation power supply signal output parts of excitation power supply module 3 connect two excitation power supply signal input parts of test interface plate, the input end of analog signal of A/D change-over circuit 12 connects the signal output part of signal conditioning circuit 13, the digital signal output end of described A/D change-over circuit 12 connects the input end of analog signal of control circuit 11, the signal input part of described signal conditioning circuit 13 connects the measuring-signal output terminal of measuring interface board 2
Described measurement interface board 2 comprises bunch of cables head end test interface 21, bunch of cables tag end test interface 22, relay array 23, simulation multiplexer 24, relay drive circuit 25, multiplexer driver 26 and interface board address decoding circuitry 27, wherein bunch of cables head end test interface 21 is identical with the quantity of bunch of cables tag end test interface 22, be respectively applied for the two ends that connect bunch of cables to be measured, a plurality of input ends of relay array 23 respectively with bunch of cables head end test interface 21 and bunch of cables tag end test interface 22 in corresponding connection of terminals, a plurality of signal input parts of simulation multiplexer 24 connect the measuring-signal output terminal of relay array 23, the signal output part of described simulation multiplexer 24 is for measuring the measuring-signal output terminal of interface board 2, the drive signal output terminal of the signal input end connection multiplexing device driver 26 of described simulation multiplexer 24, the measurement address signal output terminal of the signal input end connecting interface plate address decoding circuitry 27 of described multiplexer driver 26, the relay address signal output terminal of described interface board address decoding circuitry 27 connects the signal input end of relay drive circuit 25, and the control signal output ends of described relay drive circuit 25 connects the signal input end of relay array 23.
Described relay array 23 is used for pumping signal is communicated with cable under test bundle access point, also is used for the voltage measurement signal that band is measured is communicated with the measuring-signal input end of control survey plate 1.
Described control address decoding scheme 14 and interface board address decoding circuitry 27 can adopt the EPLD integrated circuit to realize.Described control address decoding scheme 14 is in order to expand the external interface of control circuit 11.Because counting of the tested object of the described proving installation of present embodiment is many, and quantity is uncertain, adopt control address decoding scheme 14 and interface board address decoding circuitry 27 can be according to actual needs as much as possible the quantity of expansion controlling object, make the scope of application of the described proving installation of present embodiment wider.
Simulation multiplexer in the present embodiment selects for use 16 of multi-disc 24MPC506A model to select 1 integrated circuit realization.
The described excitation power supply module 3 of present embodiment is by high-voltage DC power supply 31, low-voltage dc power supply 32, constant current direct supply 33 and select module 34 to form, described selection module 34 is according to the control signal of signal input end input, selects two power supply signal output terminals of two power supply signal output terminals of two power supply signal output terminals, low-voltage dc power supply 32 of high-voltage DC power supply 31 or constant current direct supply 33 to be connected to two excitation power supply signal output parts of excitation power supply module 3.
The output dc voltage of the high-voltage DC power supply 31 in the excitation power supply module 3 is 1000V, and electric current is 2mA, and constant current direct supply 33 output currents are the DC current of 1A.
The described bunch of cables performance automatic test of present embodiment device is in practical application, at first with the two ends of bunch of cables to be tested respectively with the bunch of cables head end test interface 21 of measuring interface board 2, bunch of cables tag end test interface 22 reliably connects, treat test cable Shu Jinhang test then, the principle of work of the described device of present embodiment is in test process: the control circuit of measuring in the control panel 1 11 passes through control address decoding scheme 14, two power output ends of the low-voltage dc power supply in the control excitation power supply module 3 connect measures the connection of two power supply pumping signals of interface board input end, i terminals in the control head end test interface 21 are connected with a power supply pumping signal input end, and each terminals in the umbilical cable bundle tag end test interface 22 are connected with another power supply pumping signal input end respectively successively, simultaneously, gather the voltage signal V1 and the V2 of described two power supply pumping signal input ends simultaneously respectively by signal conditioning circuit 13 and A/D change-over circuit 12, obtain the resistance R of the lead between two power supply pumping signal input ends, it promptly is the resistance R between each terminals in i terminals in the control head end test interface 21 and the bunch of cables tag end test interface 22, judge according to the resistance R of the lead that obtains i terminals in the head end test interface 21 with which terminals in the bunch of cables tag end test interface 22 are connected, and record, suppose to be judged to be with bunch of cables tag end test interface 22 in j terminals be communicated with, then control circuit 11, successively control two power output ends of the high-voltage DC power supply 31 in the excitation power supply module 3 then by control circuit 11, two power output ends of constant current direct supply 33 are connected with two excitation power supply signal input parts of control survey interface board 2, simultaneously, gather to obtain i terminals in the control head end test interface 21 and high-tension electricity resistance Rg and the accurate resistance value Rj between j the terminals in the bunch of cables tag end test interface 22, control circuit 1 is judged the insulation of measuring lead according to the high-tension electricity resistance Rg that obtains then, withstand voltage properties obtains to measure the phenomenon whether lead exists loose contact according to the precision resistance Rj that obtains.
In test process, circuit theory between 3 pairs of employing excitation power supply modules and the measured lead is referring to shown in Figure 2, when tested lead selected, be after K switch 4 closures, by controlling K switch 1, K2 or the K3 closure of selecting in the module 34 respectively, tested lead successively is connected in the current supply circuit that adopts high-voltage DC power supply 31, low-voltage dc power supply 32 or constant current direct supply 33 in the excitation power supply module 3.The device of present embodiment adopts the method for single end driver source input measurement, and the driving source of selection is divided into the little testing current of low-voltage source, three kinds of steady current test source and high voltage weak current test sources.Every kind test philosophy is:
Adopt low-voltage dc power supply 32 to be mainly used in break-make, short circuit and the wrong wire distribution function of measuring the bunch of cables wire harness.In the process of low voltage test, the measuring process of the resistance R of described lead is: calculate according to formula R=(V1-V2)/I and obtain resistance R, electric current I=Vr1/R1 wherein, R1 is the precision resistance of connecting in the measurement loop of low-voltage dc power supply, Vr1 is the voltage at described precision resistance two ends, then the R1/Vr1 of resistance R=(V1-V2).Material and length according to measured core of a cable, can estimate the resistance value of every lead, according to the resistance value that estimates, set reasonable range, if the resistance R of measuring is in described scope, then think between measured two terminals to be that lead connects, the terminals and the lead between the terminals in the bunch of cables tag end test interface 22 that promptly obtain in the control head end test interface 21 connect corresponding relation, when practical application, can judge the correctness that lead connects by the connection corresponding relation of contrast acquisition and the schematic diagram of measured bunch of cables.
The output voltage of the high-voltage DC power supply 31 that adopts is 1000V, and its output maximum current is used for problems such as the insulation of detection streamer bunch Shu Keneng existence, withstand voltage deficiency less than 2mA.The procurement process of described high-tension electricity resistance Rg, identical with the principle of said process, because the voltage excitation signals of high-voltage DC power supply 31 outputs is the direct current signal of high voltage-small current, principle of work is identical with megohmmeter.
The output current of the constant current direct supply 33 that adopts is controlled, can export the electric current up to 1A, cooperates 4 line Kelvin measuring methods, obtains the accurate resistance value of lead, can detect the subtle change of bunch of cables.The procurement process of described accurate resistance value Rj, be with the logical continuous current of measured lead, adopt four line Kelvin measuring methods to obtain the accurate resistance value of measured lead then, the method of replanting can be measured and obtain milliohm level resistance value, can be accurate to below 5 milliohms, can know the subtle change of lead according to the accurate resistance value Rj that obtains, and then obtain the situation existence whether lead exists loose contact.
Because present embodiment need be to the bunch of cables precision measurement of milliohm level, so the described constant current direct supply 33 of present embodiment adopts precision constant current source module able to programme.Described precision constant current source module able to programme has the characteristics of low drift, and its circuit structure is referring to shown in Figure 4.
The described precision constant current source module able to programme of present embodiment can be exported the accurate steady current of 1Ma, 10mA, 100mA or 1A as required.
REF200 in the described precision constant current source module able to programme is the precision constant current source of twin-channel 100uA ± 0.5%, produces the accurate voltage of 2mV behind 20 ohm the precision resistance Ref1 of flowing through, and offers instrument amplifier PGA204 as accurate input voltage.
Described constant current source follower is selected the precision operational-amplifier OPA602 with extremely low bias current (1pA) of TI company for use.Its positive input terminal and negative input end are equivalent to " empty disconnected ", and voltage equals voltage G (the VIN+-VIN-)+VREF (the Voltage Reference input of PGA204) of PGA204 output.The electric current at precision resistance Ref2 two ends of then flowing through is:
I_OUT＝{[G(VIN+-VIN-)+VREF]-VREF}/Ref2
＝G(VIN+-VIN-)/Ref2＝G*IREF*Ref1/Ref2
＝G*100uA*10＝G(mA)(IREF＝100uA，Ref1/Ref2＝10)
Select the strong N-channel MOS FET of driving force for use, when software set G=1000, constant current source can be exported the precision current that reaches 1A.The effect of R1 and C1 is to improve amplifier stability among the figure, reduces noise effect.
When adopting Kelvin's four line measuring methods, when accurate constant excitation electric current is 1A, be 1 milliohm if require the measuring accuracy in this machine, then minimum resolution voltage is 1mV.Adopt 12 A/D converter to carry out analog to digital conversion in the present embodiment, input range reference voltage VREF is 2.5V, and then the A/D Measurement Resolution is 0.61mV, demand that can graceful then measuring accuracy.
Described signal conditioning circuit 13 adopts programmable gain instrument amplifier PGA204 to realize, when the gain of described instrument amplifier is 100, the reading of 1mV is 1mV*100*211/2.5V ≈ 81LSB, almost eliminated noise and interference to the influence of measuring accuracy, fully satisfied of the requirement of the described measurement mechanism of present embodiment measuring accuracy.
By above-mentioned detection, if the bunch of cables that n bar lead is formed detects, need N=[n* (n-1)]/2 times switching, detection, just can obtain the connection situation of all leads of described bunch of cables two ends, and the situation that contacts between the insulation situation of every lead, every lead two ends and the connector.
Embodiment two: the described bunch of cables performance automatic test of present embodiment device is on the basis of embodiment one described technical scheme, increased driven in series circuit 18, the data serial I/O end of described driven in series circuit 18 connects the serial data I/O end of control circuit 11.
The driven in series circuit 18 that present embodiment increases can adopt existing SPI communication drive circuit to realize.After increasing this driven in series circuit 18, can realize the cascade operation of many bunch of cables performance automatic test devices.
In order to improve communication speed, simplified design has adopted the synchronous serial Peripheral Interface SPI of single-chip microcomputer C8051 in the present embodiment, the communication speed that surpasses 2Mbps is provided.Wherein the single-chip microcomputer SPI interface of main proving installation is cooked main leaf, does from sheet from the single-chip microcomputer SPI interface of proving installation, and the communication bus one between them has 8 data lines, adopts the mode cascade of daisy chain.Described serial communication bus comprises that serial time clock line (SPICLK), main leaf input/from sheet output data line SPIMISO, main leaf output/from sheet input data line SPIMOSI, low level is effectively from sheet selection wire SPINSS, the SPIINT bus that is used for the slave unit interrupt request and three gating IO lines.Described three IO buses are used for and the slave unit address decoding, and the internal sheets choosing and the interrupt request line of maximum 7 slave units of timesharing gating have reduced the bus number that connects.When slave unit address not during gating, MISO signal wire and INT signal wire in this machine are in high-impedance state.Main proving installation and connect to adopt RS422 bus driver form from the SPI interface Physical layer between the proving installation, the RS422 interface adopts difference modes, can transmit the transfer rate of 10Mbps on twisted-pair feeder, can satisfy the needs of SPI interface among the design.
A plurality of proving installations of the cascade in the present embodiment can adopt the cabinet board plug type structure based on bus form.
Embodiment three: the described bunch of cables performance automatic test of present embodiment device is on the basis of embodiment one or two described technical schemes, increased USB driving circuit 15, the serial data I/O end of described USB driving circuit 15 connects the Serial Control data I/O end of control circuit 11.
The USB driving circuit 15 that present embodiment increases can be realized the communication function between proving installation and the host computer.In measuring process, by the described USB driving circuit 15 real-time measurement data that obtain to the host computer reporting measurement.Described USB driving circuit 15 can adopt the device PDIUSBD12 type integrated circuit of the complete compatible USB1.1 standard of PHILIPS company to realize, PDIUSBD12 communicates by High Speed General parallel interface and single-chip microcomputer, interface modes adopts address/bus multiplex mode, to a slice RAM device that the read-write of device extends out just as single-chip microcomputer, handle the host computer communication event by triggering single-chip microcomputer external interrupt pattern notice master routine.
In the present embodiment, adopt inner 12 the A/D change-over circuits of single-chip microcomputer to realize the voltage of measuring the bunch of cables contact that obtains is carried out analog to digital conversion.The high-voltage DC power supply 31, low-voltage dc power supply 32 or the constant current direct supply that adopt 12 DAC circuit to realize controlling in the driving source module 3 are exported correspondent voltage or current excitation signal.
Embodiment four: the described bunch of cables performance automatic test of present embodiment device is on the basis of embodiment one, two or three described technical schemes, SRAM storer 16 and eeprom memory 17 have been increased, the data I/O end of described SRAM storer 16 connects the SRAM data I/O end of control circuit 11, and the data I/O end of described eeprom memory 17 connects the data I/O end of the EEPROM of control circuit 11.
Can adopt I between eeprom memory 17 that increases in the present embodiment and the control circuit 11
2The C bus connects.Described eeprom memory 17 is used for the access times (being the switch number of times) of all relays of storage relay array, prevents owing to the performance that the life-span overload influences proving installation appears in relay.When the access times of a certain relay during near its serviceable life, send information by control circuit 11, be convenient to the instant maintenance of maintainer to proving installation, guarantee precision of test result and reliability that proving installation obtains.
The SRAM storer 16 that present embodiment increases is outside extended memories, is used for temporary test data.
Claims (10)
1. bunch of cables performance automatic test device is characterized in that it comprises excitation power supply module (3), control survey plate (1) and measures interface board (2),
Control survey plate (1) comprises control circuit (11), signal conditioning circuit (13), A/D change-over circuit (12) and control address decoding scheme (14), the measurement address signal output terminal of control circuit (11) connects the address signal input end of control address decoding scheme (14), the power control signal output terminal of control circuit (11) connects the signal input end of excitation power supply module (3), two excitation power supply signal output parts of excitation power supply module (3) connect two excitation power supply signal input parts of test interface plate, the input end of analog signal of A/D change-over circuit (12) connects the signal output part of signal conditioning circuit (13), the digital signal output end of described A/D change-over circuit (12) connects the input end of analog signal of control circuit (11), the signal input part of described signal conditioning circuit (13) connects the measuring-signal output terminal of measuring interface board (2)
Described measurement interface board (2) comprises bunch of cables head end test interface (21), bunch of cables tag end test interface (22), relay array (23), simulation multiplexer (24), relay drive circuit (25), multiplexer driver (26) and interface board address decoding circuitry (27), wherein bunch of cables head end test interface (21) is identical with the quantity of the connection terminal of bunch of cables tag end test interface (22), be respectively applied for the two ends that connect bunch of cables to be measured, a plurality of input ends of relay array (23) respectively with bunch of cables head end test interface (21) and bunch of cables tag end test interface (22) in corresponding connection of terminals, a plurality of signal input output ends of simulation multiplexer (24) connect the measuring-signal input/output terminal of relay array (23), the signal output part of described simulation multiplexer (24) is for measuring the measuring-signal output terminal of interface board (2), the drive signal output terminal of the signal input end connection multiplexing device driver (26) of described simulation multiplexer (24), the measurement address signal output terminal of the signal input end connecting interface plate address decoding circuitry (27) of described multiplexer driver (26), the relay address signal output terminal of described interface board address decoding circuitry (27) connects the signal input end of relay drive circuit (25), and the control signal output ends of described relay drive circuit (25) connects the signal input end of relay array (23).
2. bunch of cables performance automatic test device according to claim 1, it is characterized in that described excitation power supply module (3) is by high-voltage DC power supply (31), low-voltage dc power supply (32), constant current direct supply (33) and selection module (34) are formed, described selection module (34) is selected two power supply signal output terminals of high-voltage DC power supply (31) according to the control signal of signal input end input, two power supply signal output terminals of low-voltage dc power supply (32) or two power supply signal output terminals of constant current direct supply (33) are connected to two excitation power supply signal output parts of excitation power supply module (3).
3. bunch of cables performance automatic test device according to claim 1 is characterized in that described control address decoding scheme (14) and interface board address decoding circuitry (27) adopt the EPLD integrated circuit to realize.
4. bunch of cables performance automatic test device according to claim 2, the output dc voltage that it is characterized in that described high-voltage DC power supply (31) is 1000V, and electric current is 2mA, and constant current direct supply (33) output current is the DC current of 1A.
5. bunch of cables performance automatic test device according to claim 2 is characterized in that described constant current direct supply (33) adopts precision constant current source module able to programme, exports the accurate steady current of 1mA, 10mA, 100mA or 1A respectively.
6. bunch of cables performance automatic test device according to claim 1 is characterized in that described signal conditioning circuit (13) adopts programmable gain instrument amplifier PGA204 to realize.
7. bunch of cables performance automatic test device according to claim 1, it is characterized in that described proving installation also comprises driven in series circuit (18), the data serial I/O end of described driven in series circuit (18) connects the serial data I/O end of control circuit (11).
8. bunch of cables performance automatic test device according to claim 1, it is characterized in that described proving installation also comprises USB driving circuit (15), the serial data I/O end of described USB driving circuit (15) connects the Serial Control data I/O end of control circuit (11).
9. bunch of cables performance automatic test device according to claim 1 is characterized in that described control circuit (11) and A/D change-over circuit select for use the single-chip microcomputer C8051F020 of the analog-and digital-mixed signal of Cygnal company to realize.
10. bunch of cables performance automatic test device according to claim 1, it is characterized in that described proving installation also comprises SRAM storer (16) and eeprom memory (17), the data I/O end of described SRAM storer (16) connects the SRAM data I/O end of control circuit (11), and the data I/O end of described eeprom memory (17) connects the data I/O end of the EEPROM of control circuit (11).
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| CN2009100724233A CN101937037A (en) | 2009-07-01 | 2009-07-01 | Device for automatically testing performance of cable bunch |
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| CN102967789A (en) * | 2011-09-01 | 2013-03-13 | 致茂电子股份有限公司 | High voltage test method and device with contact point loop rapid test function |
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| CN102955096A (en) * | 2012-10-25 | 2013-03-06 | 西安开容电子技术有限责任公司 | Cable testing mechanism |
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| CN103323730B (en) * | 2013-06-06 | 2016-07-06 | 南通东辰安费诺汽车电子有限公司 | Multifunctional high pressure measuring instrument |
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| CN103344868A (en) * | 2013-06-19 | 2013-10-09 | 四国电线（东莞）有限公司 | Cable automatic tester |
| CN103454557B (en) * | 2013-08-29 | 2016-06-22 | 华为技术有限公司 | The detection method of a kind of cable fault and detecting device |
| CN103454557A (en) * | 2013-08-29 | 2013-12-18 | 华为技术有限公司 | Method and device for detecting cable fault |
| CN103675459A (en) * | 2013-11-29 | 2014-03-26 | 上海华力微电子有限公司 | Method for measuring conductor resistance in integrated circuit |
| CN104297623B (en) * | 2014-10-31 | 2017-04-12 | 中国商用飞机有限责任公司 | Automatic test system for onboard cable integrity |
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| CN104569601A (en) * | 2014-12-23 | 2015-04-29 | 北京新能源汽车股份有限公司 | Device and method for detecting insulating property of high-voltage control box of electric automobile |
| CN105223461A (en) * | 2015-09-25 | 2016-01-06 | 长治清华机械厂 | A kind of polycore cable insulation, short-circuit detecting device and method |
| JP2017131053A (en) * | 2016-01-21 | 2017-07-27 | パナソニックＩｐマネジメント株式会社 | Motor adjustment system |
| CN106324441A (en) * | 2016-11-08 | 2017-01-11 | 骆香山 | Cable detection system based on single chip |
| CN108983019A (en) * | 2018-05-25 | 2018-12-11 | 中车青岛四方机车车辆股份有限公司 | Cable continuity test method, apparatus and test equipment |
| CN110286285A (en) * | 2019-07-10 | 2019-09-27 | 深圳国人通信股份有限公司 | A kind of test equipment and test method for testing AISG electricity tune equipment |
| CN110286285B (en) * | 2019-07-10 | 2022-02-01 | 深圳国人通信股份有限公司 | Test equipment and test method for testing AISG (automatic identification System) electric tilt equipment |
| CN110763919A (en) * | 2019-11-06 | 2020-02-07 | 余姚市劲仪仪表有限公司 | Resistance measuring meter and measuring method for measuring resistance value of thermal resistance lead |
| CN112630533A (en) * | 2020-11-19 | 2021-04-09 | 上海电机学院 | Power cable core detection device and method thereof |
| CN112763815A (en) * | 2020-12-03 | 2021-05-07 | 北京无线电计量测试研究所 | Cable bundle injection simulation source embedded test method |
| CN114323101A (en) * | 2021-11-30 | 2022-04-12 | 广西科学院 | Multi-path magnetic flux sensor fault detection device and detection method thereof |
| CN114323101B (en) * | 2021-11-30 | 2024-03-08 | 广西科学院 | Multi-path magnetic flux sensor fault detection device and detection method thereof |
| CN113960456A (en) * | 2021-12-20 | 2022-01-21 | 深圳市永达电子信息股份有限公司 | Automatic detection device and method for micro-damage of circuit interface |
| CN113960456B (en) * | 2021-12-20 | 2022-03-29 | 深圳市永达电子信息股份有限公司 | Automatic detection method for micro-damage of circuit interface |
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Application publication date: 20110105 |