CN206818799U - A kind of multichannel precision micro resistance test system - Google Patents
A kind of multichannel precision micro resistance test system Download PDFInfo
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- CN206818799U CN206818799U CN201720506571.1U CN201720506571U CN206818799U CN 206818799 U CN206818799 U CN 206818799U CN 201720506571 U CN201720506571 U CN 201720506571U CN 206818799 U CN206818799 U CN 206818799U
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Abstract
The utility model provides a kind of multichannel precision micro resistance test system, micro resistance is milliohm rank, including be sequentially connected electrically CPLD control units, measurement module, more gear switching control modules, multichannel integrated circuit, multiple signals analytic unit, I/O unit, CPLD control unit electric connection of power supply input/output modules, input power use after CPLD control units are adjusted to required voltage for system.This multichannel precision micro resistance test system provided by the utility model, by detecting tested cable wire harness and connector loop resistance minor variations, realize connector and the precision measurement of multi-route cable bundles, detect disconnected short circuit existing for connector or cable wire harness, connect, the hidden danger of quality that disconnected core is stranded more, precision is high, and speed is fast.
Description
Technical field
The utility model belongs to instrumentation technical field of measurement and test, and in particular to a kind of multichannel precision micro resistance test system
System.
Background technology
At present, either military enterprise, or Aero-Space or the processing of household line cable bundles, to core of a cable, connector
Deng requirement more and more higher, it is therefore desirable on off test and multichannel milliohm are carried out automatically to connector and multi-route cable bundles
Rank resistance test and cored wire interrupt the stranded detection of core, the technological means that detection uses at present be using traditional universal meter or
It is middle conduction instrument on the market.
But because the loop resistance majority in connector or cable wire harness belongs to milliohm rank, universal meter or on the market in
Conduction instrument can not meet work requirements already, and not only test scope is narrow, detection precision is low, and can not detect multiply electricity simultaneously
Situations such as more wrongs occurred in cable connect, detection efficiency is low.
Utility model content
The purpose of this utility model is to realize that connector and multi-route cable bundles carry out on off test and multichannel automatically
Milliohm rank resistance test and cored wire interrupt the stranded detection of core.
Therefore, the utility model provides a kind of multichannel precision micro resistance test system, micro resistance is milliohm rank, bag
Include the CPLD control units being sequentially connected electrically, measurement module, more gear switching control modules, multichannel integrated circuit, multichannel letter
Number analytic unit, I/O unit, described CPLD control unit electric connection of power supply input/output modules, input power warp
CPLD control units use after adjusting to required voltage for system；Described I/O unit includes input block and output
Unit, the input block electrical connection CPLD control units of I/O unit, output unit electrical connection multiple signals analysis are single
Member；The measured piece of testing resistance is electrically connected by switching tooling with measurement module, and described multichannel integrated circuit preserves mark
Quasi- resistance value, and including a plurality of autonomous channel, at the preservation for resistance test value after multiple conducting wires in measured piece simultaneously test
Reason；The resistance test Value Data and measuring resistance data of described multiple signals analytic unit collection multichannel integrated circuit, lead to
Judge whether measured piece is qualified after crossing comparative analysis, and test result signal is sent to I/O unit.
Also include being used for located at the filter unit between multichannel integrated circuit and multiple signals analytic unit, filter unit
Remove interference and not clear data of the multichannel integrated circuit printed board in itself and between signal.
The output end of the I/O unit is also connected with display and keypad, parameter setting and test result it is aobvious
Show and operate and show by display and keypad.
The measurement module is high-precision constant flow source circuit, and the test of micro resistance is realized using 4-Wire Kelvin Test method.
The precision of the tested cable resistance of high-precision constant flow source circuit test is 0.5% ± 2m Ω.
The beneficial effects of the utility model are：
This multichannel precision micro resistance test system provided by the utility model, by detecting that tested cable resistance is micro-
Small change, connector and the precision measurement of multi-route cable bundles are realized, detected disconnected short existing for connector or cable wire harness
Road, connect, the hidden danger of quality that disconnected core is stranded, precision is high, and speed is fast more.
It is described in further details below in conjunction with accompanying drawing.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Embodiment 1：
A kind of multichannel precision micro resistance test system is present embodiments provided, micro resistance is milliohm rank, including successively
The CPLD control units of electrical connection, measurement module, more gear switching control modules, multichannel integrated circuit, multiple signals analysis
Unit, I/O unit, described CPLD control unit electric connection of power supply input/output modules, input power are controlled through CPLD
Unit processed uses after adjusting to required voltage for system；Described I/O unit includes input block and output unit, defeated
Enter/the input block of output unit electrical connection CPLD control units, output unit electrical connection multiple signals analytic unit；Electricity to be measured
The measured piece of resistance is electrically connected by switching tooling with measurement module, and described multichannel integrated circuit preserves standard electric resistance,
And including a plurality of autonomous channel, the preservation processing of resistance test value tested for multiple conducting wires in measured piece simultaneously after；Described
Multiple signals analytic unit gathers the resistance test Value Data and measuring resistance data of multichannel integrated circuit, passes through comparative analysis
Judge whether measured piece is qualified afterwards, and test result signal is sent to I/O unit.
The measured piece of testing resistance by an input of switching tooling and I/O unit connect, by input/
Another input of output unit sends instructions to CPLD control units, and CPLD control units send a signal to survey after receiving instruction
Module is measured, the resistance of measured piece is tested, test result signal is transferred to more gear switching control modules, more gear switches
Control module switches to corresponding gear according to test result signal, and sends data at most passage integrated circuit and preserved,
Wherein, multichannel integrated circuit preserves standard electric resistance, and including a plurality of autonomous channel, it is same for multiple conducting wires in measured piece
When test after resistance test value preservation processing, multiple signals analytic unit gather multichannel integrated circuit resistance test value number
According to measuring resistance data, by judging whether measured piece qualified after comparative analysis, and by test result signal be sent to input/
Output unit, it will be exported after test result progress A/D conversions by I/O unit output end.
Multichannel precision micro resistance testing process, by taking the cable containing a plurality of wire as an example：
After a qualified cable both ends are accessed into the I/O unit port of test system first, test system is carried out
Self study is tested, and for a plurality of wire after measurement module measures, self study result is stored in multichannel integrated circuit conduct in cable
Standard electric resistance.When the cable of same specification is tested, multichannel integrated circuit is same by resistance test value and standard electric resistance
When send data to multiple signals analytic unit, signal acquisition process of the multiple signals analytic unit to multichannel integrated circuit
Afterwards, by data analysis, judge whether surveyed data are qualified, you can judge whether its annexation is correct, and whether is resistance error
It is within the scope of setting, such as exceeds error range, then it is stranded there is disconnected core.
The test system function：Whether the annexation of the tested cable of test is correct, by resistance multilevel iudge by survey line
Cable is stranded with the presence or absence of disconnected core, judges that one is long or too short whether there is a certain loop line length in cable.
Embodiment 2：
On the basis of embodiment 1, a kind of multichannel precision micro resistance test system as shown in Figure 1 is present embodiments provided
System, in addition to located at the filter unit between multichannel integrated circuit and multiple signals analytic unit, filter unit is used for removing
Interference and not clear data of the multichannel integrated circuit printed board in itself and between signal.
The present embodiment provides the electric current needed for test using high precise current source, will using Kelvin bridge test resistance
Test resistance is compared with measuring resistance, is shifted gears using more gear switching control modules, with reference to multichannel integrated circuit
Tested, and carry out data preservation, the cable of such user avoids the need for being to correspond to connect, and can select corresponding logical
Road is tested, and realizes the test of multichannel precision resistance tester, the demand of more efficient adaptation user.The input/output
The output end of unit is also connected with display and keypad, and the display of parameter setting and test result passes through display and keypad
To operate and show.
Wherein, multiple signals analytic unit is amplified by forward path and filtered after electrical isolation and A/D is carried out
After signal acquisition process, by data analysis, judge whether surveyed data are qualified, send a signal to I/O unit afterwards,
I/O unit transmits a signal to CPLD control units again, after CPLD control units are handled and are stored, output signal
To I/O unit, final test result is transmitted and shown by display by CPLD control units, realizes multichannel precision
The test of resistance.
In the present embodiment, the precision of the tested cable resistance of high-precision constant flow source circuit test is 0.5% ± 2m Ω.It is high-precision
Degree constant-current source uses CYT3000B chips, and multiple signals analytic unit selects high-speed comparator ADCMP600 chips, multichannel collection
One is may be designed into circuit and more gear switching control modules, is realized using TX series of signals relay, CPLD control units
Belong to prior art with filter unit.Switching tooling is to realize the connection of part to be measured and detecting system, avoid interface from not uniting
One can not connect.
The part and the well-known components and common structure of the structure category industry or conventional that above example does not describe in detail
Means, do not describe one by one here.
Exemplified as above is only for example, not forming to the scope of protection of the utility model to of the present utility model
Limitation, it is every to be belonged to the same or analogous design of the utility model within protection scope of the present invention.
Claims (5)
1. a kind of multichannel precision micro resistance test system, micro resistance is milliohm rank, it is characterised in that：Including being sequentially connected electrically
CPLD control units, measurement module, more gear switching control modules, multichannel integrated circuit, multiple signals analytic unit, defeated
Enter/output unit, described CPLD control unit electric connection of power supply input/output modules, input power is through CPLD control units
Used after regulation to required voltage for system；Described I/O unit includes input block and output unit, input/defeated
Go out the input block electrical connection CPLD control units of unit, output unit electrical connection multiple signals analytic unit；Testing resistance
Measured piece is electrically connected by switching tooling with measurement module, and described multichannel integrated circuit preserves standard electric resistance, and wraps
A plurality of autonomous channel is included, the preservation processing of resistance test value tested for multiple conducting wires in measured piece simultaneously after；Described multichannel
Signal analysis unit includes collection resistive module and comparative analysis module, and the collection resistive module integrates for gathering multichannel
The resistance test Value Data and measuring resistance data of circuit, the comparative analysis module are used for resistance test Value Data and standard
Resistance data compares post analysis and judges whether measured piece is qualified, and test result signal is sent into I/O unit.
A kind of 2. multichannel precision micro resistance test system according to claim 1, it is characterised in that：Also include located at more
Filter unit between passage integrated circuit and multiple signals analytic unit, filter unit are used for removing multichannel integrated circuit print
Interference and not clear data of the making sheet in itself and between signal.
A kind of 3. multichannel precision micro resistance test system according to claim 1, it is characterised in that：The input/defeated
The output end for going out unit is also connected with display and keypad, and the display of parameter setting and test result passes through display and button
Plate is operated and shown.
A kind of 4. multichannel precision micro resistance test system according to claim any one of 1-3, it is characterised in that：It is described
Measurement module is high-precision constant flow source circuit, and the test of micro resistance is realized using 4-Wire Kelvin Test method.
A kind of 5. multichannel precision micro resistance test system according to claim 4, it is characterised in that：The high-accuracy and constant
The precision of the tested cable resistance of current source circuit test is 0.5% ± 2m Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720506571.1U CN206818799U (en) | 2017-05-09 | 2017-05-09 | A kind of multichannel precision micro resistance test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720506571.1U CN206818799U (en) | 2017-05-09 | 2017-05-09 | A kind of multichannel precision micro resistance test system |
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| Publication Number | Publication Date |
|---|---|
| CN206818799U true CN206818799U (en) | 2017-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720506571.1U Expired - Fee Related CN206818799U (en) | 2017-05-09 | 2017-05-09 | A kind of multichannel precision micro resistance test system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030949A (en) * | 2018-08-17 | 2018-12-18 | 深圳市派捷电子科技有限公司 | A kind of device and method of four lines test resistance |
| CN109298243A (en) * | 2018-09-06 | 2019-02-01 | 国营芜湖机械厂 | A kind of multichannel sensor internal resistance rapid measurement device and its application method |
| CN114089040A (en) * | 2021-11-01 | 2022-02-25 | 苏州茂鼎电子科技有限公司 | Multichannel high-precision LCR test system |
| CN114200346A (en) * | 2021-11-18 | 2022-03-18 | 苏州浪潮智能科技有限公司 | Device and method for detecting on-off of cables in server system |
| CN115561527A (en) * | 2022-11-17 | 2023-01-03 | 之江实验室 | Multi-path small-size small-resistance power-on aging and resistance monitoring system and method |
-
2017
- 2017-05-09 CN CN201720506571.1U patent/CN206818799U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030949A (en) * | 2018-08-17 | 2018-12-18 | 深圳市派捷电子科技有限公司 | A kind of device and method of four lines test resistance |
| CN109298243A (en) * | 2018-09-06 | 2019-02-01 | 国营芜湖机械厂 | A kind of multichannel sensor internal resistance rapid measurement device and its application method |
| CN114089040A (en) * | 2021-11-01 | 2022-02-25 | 苏州茂鼎电子科技有限公司 | Multichannel high-precision LCR test system |
| CN114200346A (en) * | 2021-11-18 | 2022-03-18 | 苏州浪潮智能科技有限公司 | Device and method for detecting on-off of cables in server system |
| CN114200346B (en) * | 2021-11-18 | 2024-01-12 | 苏州浪潮智能科技有限公司 | Device and method for detecting on-off of cable in server system |
| CN115561527A (en) * | 2022-11-17 | 2023-01-03 | 之江实验室 | Multi-path small-size small-resistance power-on aging and resistance monitoring system and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |