CN102680859B - Conduction and insulation testing method for cable network - Google Patents
Conduction and insulation testing method for cable network Download PDFInfo
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- CN102680859B CN102680859B CN201210176715.3A CN201210176715A CN102680859B CN 102680859 B CN102680859 B CN 102680859B CN 201210176715 A CN201210176715 A CN 201210176715A CN 102680859 B CN102680859 B CN 102680859B
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Abstract
The invention discloses a conduction and insulation testing method for a cable network, which realizes the conduction test and insulation test of the cable network. As for the induction test, connectors of one or more than one terminal of the tested cable network are all short-circuited, and the connectors of the rest terminals are connected with a junction box; common ends of the junction box are short-circuited, and the test end connected with the contact of the connectors which are connected parallely, is closed; the resistance value of a reference point is confirmed; the contact of the tested connectors is selected, and the resistance value of the reference point connected with the contact of the tested connectors is measured by a universal meter so as to serve as the test resistance value; and the conduction state can be judged according to the practical resistance value of the signal contact of the tested connectors which is obtained through the test resistance value. As for the insulation test, connectors of one or more than one terminal of the tested cable network are connected to the test end of the junction box; the common ends of the junction box are all short-circuited, and the test end and the corresponding public end are closed; and the insulation detection of the test end is carried out by a megameter. The method provided by the invention simplifies the conduction and insulation test process of the cable network.
Description
Technical field
The present invention relates to a kind of conducting insulation test method for cable system.
Background technology
Interconnected power supply and the signal transmission pathway of providing that large scale system engineering is hardware device as complicated and diversified cable system systems in field such as Aeronautics and Astronautics, building, electrical engineerings, in order to ensure the safe reliability of power supply and signal, before use, need whole cable system to check.
Traditional continuity test method, not only can not realize the continuity test of longer transmission cable system, and also need the resistance to line to carry out the calculating of resistance for multiple spot wiring, and there is error in the result of calculation obtaining and actual line resistance, for long line service cable net, resistance accuracy requires strict, in power supply process, it is excessive that error amount may cause that line pressure falls, and causes power supply capacity deficiency, and power-supply unit is damaged.
And traditional method of testing requires harsh to cable system test environment, conducting can not realize remote long line transmission and single-ended cable system inspection, Insulation test need to carry out one by one each contact on each connector to the single-point of all the other whole contacts to single-point, the insulation inspection of single point-to-multipoint, method of testing complexity and engaged test time are longer.And the safe reliability of conventional test methodologies is poor, cover not comprehensively, manpower and materials time resource utilization factor is low.
Summary of the invention
Technology of the present invention is dealt with problems and is: for the deficiencies in the prior art, provide a kind of conducting insulation test method for cable, simplified the conducting Insulation test flow process to cable system.
Technical solution of the present invention is:
In continuity test:
(1A) by the whole short circuits of connector contact of one or more terminals in tested cable system, corresponding being connected of test lead by the connector in all the other terminals with interconnecting device, described interconnecting device comprises test lead and common port, described test lead is corresponding one by one with described common port, and can being communicated with by switch control test lead and common port;
(1B) common port of described interconnecting device is carried out to short circuit, and by described cable system and connect the connected test lead closure of connector contact, described and connect connector contact for transmitting same signal at described cable system;
(1C) choose the arbitrary contact of test lead in interconnecting device as reference point, and utilize the loop resistance value of multimeter datum mark, and definite reference point resistance;
(1D) select tested connector signal contact, the test lead signal contact that utilizes multimeter to measure to be connected with tested connector and the resistance of reference point are as test resistance;
(1E) the test resistance of acquisition is deducted to the circuit resistance of multimeter test and described reference point resistance and obtain the actual resistance of tested connector, determine the conducting state of tested connector according to the actual resistance of tested connector signal contact;
In Insulation test:
(2A) the connector correspondence of one or more terminals in tested cable system is connected to the test lead of interconnecting device;
(2B) by whole the common port of interconnecting device short circuits, and by all test leads and corresponding common port closure on interconnecting device;
(2C) utilize megohmmeter to the inspection of insulating of whole test leads.
The present invention compared with prior art tool has the following advantages:
The present invention has realized path resistance to cable system and comprehensive checking of dielectric voltage withstand performance by cable system being carried out to conducting and Insulation test, and can further embody the unfailing performance of cable system in engineering application, greatly reduce manpower and materials time resource simultaneously and utilized problem.
In continuity test, adopt the method for testing of far-end connector short circuit near-end connector parallel connection, solve the continuity test at complicated cable and cable system, be more suitable for long-range complicated cable system test, effect is more outstanding.And compared with wireline test in the past, this method of testing is suitable for flexibly, has reached universalization and the easy of testing process.
In Insulation test, adopt near-end short circuit one-to-many, many-to-one method of testing, has solved many single-points and cable system test coverage and loaded down with trivial details problem many and point, more becomes effective for complicated contact cable system test.
Brief description of the drawings
Fig. 1 is process flow diagram of the present invention, and wherein, Fig. 1 a is continuity test process flow diagram, and Fig. 1 b is Insulation test process flow diagram;
Fig. 2 is continuity test connection layout;
Fig. 3 is Insulation test connection layout.
Embodiment
Just by reference to the accompanying drawings the present invention is described further below.
If Fig. 1 a is continuity test process flow diagram of the present invention, process is as follows:
Step 1A: by tested cable system by being connected with interconnecting device shown in Fig. 2, wherein, cable system comprises two terminals, by the whole short circuits of connector contact of one of them terminal, corresponding being connected of test lead by the connector in another terminal with interconnecting device, described interconnecting device comprises test lead and common port, in interconnecting device inside, test lead and described common port are corresponding connected one by one by switch, utilize being communicated with of switch control test lead and common port.If for the complicated long cable network of satellite launch pylon, cable network terminal connector on pylon is used to the whole short circuits of dead-short-circuit head, under launching tower, the n of a cable system terminal is connected to test lead on interconnecting device.
Step 1B: utilize short circuit head to carry out short circuit the common port of above-mentioned interconnecting device, simultaneously by with the same signal of transmission in cable system and connect the corresponding test lead closure of connector.
Step 1C: choose the arbitrary contact of test lead in interconnecting device as reference point, utilize the loop resistance value of multimeter datum mark as reference point resistance.When test, multimeter is selected " automatic range " ohms range, uses the negative optional interconnecting device test lead of test pencil a bit as reference point, and the positive optional interconnecting device test lead of test pencil a bit carries out the measurement of reference point resistance as reference point loop point.
Step 1D: select tested connector, the test lead contact that utilizes multimeter to measure to be connected with tested connector and the resistance of reference point are as test resistance.Negative multimeter test pencil is plugged on to the above-mentioned datum of choosing constant, any point that the positive test pencil of multimeter was placed on and connect the test lead that connector is corresponding measure in cable system and connect connector in the resistance of signal transmission.
Step 1E: the test resistance obtaining in step 1D is deducted to the circuit resistance of multimeter test and described reference point resistance and obtains the actual resistance of tested connector signal contact, determine the conducting state of tested connector signal according to the actual resistance of tested connector signal contact.
Fig. 1 b is Insulation test process flow diagram of the present invention, and process is as follows:
Step 2A: by tested cable system by the test lead that shown in Fig. 3, the connector correspondence of a terminal is connected to interconnecting device.For the cable system on launching tower, the cable system terminal on satellite launch pylon can be connected to interconnecting device test lead, utilize dead-short-circuit head to carry out short circuit interconnecting device common port.
Step 2B: by whole the common port of interconnecting device short circuits, and the gauge tap between test lead on interconnecting device and common port is all closed, be communicated with corresponding test lead and common port.
Step 2C: utilize megohmmeter to the inspection of insulating of whole test leads.Comprise the insulation inspection between connector and connector housings and and connect the insulation inspection between connector insulation inspection.In test process, corresponding test lead is as occurred and connecing connector contact, the insulation of megohmmeter is designated as conducting state, until also interface all disconnects, megohmmeter instruction just can be shown as state of insulation, as occurred in test process, connector is adhered and off-state, and this method of testing can both be verified.Guarantee the safety and reliability of cable system.
When test, utilize megohmmeter " 250V " voltage gear, by constant the negative megohmmeter test pencil public termination point of any interconnecting device of pegging graft, the positive test pencil of megohmmeter is connected in cable system and patches on body contact, measure the insulativity of the whole connector contacts of cable system to plug shell, observe megohmmeter instruction, be designated as " ∞ ", represent normal phenomenon, there is no signal and package case short circuit.Utilize the positive test pencil of megohmmeter to be connected on the tested contact of interconnecting device test lead, disconnect corresponding signal contact simultaneously, megohmmeter pointer to " ∞ ", represents that this signal isolation is normal by conducting state automatic fall-back, and this test signal and all the other whole signals do not have short circuit phenomenon.
Traditional insulation test method, can only carry out man-to-man Insulation test by the contact on connector, measures number of times to be: (n-1)+and (n-2)+... + [n-(n-1)], wherein, n is connector number of contacts.Data volume is loaded down with trivial details, and can not embody in cable system and connect connector and other connectors between insulativity, if there is a large amount of and contact connector in now in cable system, because poor insulativity causes and interface disconnects, this method of testing can not be verified and the integrity of interface.Above-mentioned insulation test method adopts near-end short circuit one-to-many, many-to-one test, and near-end refers to, in the cable system of complicated difficult operation, can select arbitrarily end relatively easy to operate in one end to carry out Insulation test, and dirigibility is good.One-to-many refers to the Insulation test of single transmission signal path and multiway transmission signal, and many-one refers to multichannel and connects signal and the Insulation test of one-channel signal.Therefore, adopt the present invention to reduce the triviality of test, testing time is less than or equal to n time, and cable system contact are more much more complicated, tests simplyr, and measurement number of times is fewer, more saves time.In large scale system cable system, cable radical is thousands of, the limb complexity of collecting, terminal interface connector number kind quantity is also various, the contact difference of each connector, for 50 core contacts entirely independently connector according to traditional insulation test method need to carry out 1250 times test, and adopt insulation test method of the present invention, only need 50 tests, further, if there is and connect connector in 50 core connectors, measuring test is less than 50 times, and contact is more, measure number of times fewer, simultaneously can verify and connect connector and the integrity in parallel of the inspection of insulate connect in the situation that.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (1)
1. for a conducting insulation test method for cable system, it is characterized in that comprising the following steps:
In continuity test:
(1A) by the whole short circuits of connector contact of a terminal in tested cable system, corresponding being connected of test lead by the connector in another terminal with interconnecting device, described interconnecting device comprises test lead and common port, described test lead is corresponding one by one with described common port, and can being communicated with by switch control test lead and common port;
(1B) common port of described interconnecting device is carried out to short circuit, and by described cable system and connect the connected test lead closure of connector contact;
(1C) choose the arbitrary contact of test lead in interconnecting device as reference point, and utilize the loop resistance value of multimeter datum mark, and definite reference point resistance;
(1D) select tested connector signal contact, the test lead signal contact that utilizes multimeter to measure to be connected with tested connector and the resistance of reference point are as test resistance;
(1E) the test resistance of acquisition is deducted to the circuit resistance of multimeter test and described reference point resistance and obtain the actual resistance of tested connector, determine the conducting state of tested connector according to the actual resistance of tested connector signal contact;
In Insulation test:
(2A) the connector correspondence of a terminal in tested cable system is connected to the test lead of interconnecting device;
(2B) by whole the common port of interconnecting device short circuits, and by all test leads and corresponding common port closure on interconnecting device;
(2C) utilize megohmmeter to the inspection of insulating of whole test leads, insulation inspection comprise to the insulation inspection between connector and connector housings and and connect the insulation inspection between connector; Insulation checking process between described connector housings is as follows: utilize megohmmeter " 250V " voltage gear, by constant negative megohmmeter any public termination point of test pencil grafting interconnecting device, the positive test pencil of megohmmeter is connected in cable system on connector contact, measure the insulativity of the whole connector contacts of cable system to plug shell, the instruction of observation megohmmeter, be designated as " ∞ ", represent normal phenomenon, there is no signal and plug shell short circuit.
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| CN201210176715.3A CN102680859B (en) | 2012-05-31 | 2012-05-31 | Conduction and insulation testing method for cable network |
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| CN201210176715.3A CN102680859B (en) | 2012-05-31 | 2012-05-31 | Conduction and insulation testing method for cable network |
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| CN102841159A (en) * | 2012-09-26 | 2012-12-26 | 苏州大学 | Method for detecting residual amount of phoxim inside body of silkworm |
| CN105334352B (en) * | 2014-08-11 | 2018-08-21 | 北京航天动力研究所 | A kind of three-position switch array conducting insulated test device and method |
| CN109425805A (en) * | 2017-09-01 | 2019-03-05 | 中国科学院长春光学精密机械与物理研究所 | The single-ended measurement method of cable on-off and system on machine |
| CN108594015A (en) * | 2018-04-17 | 2018-09-28 | 中北大学 | Cable static impedance auto testing instrument and test method |
| CN110045208A (en) * | 2019-04-30 | 2019-07-23 | 北京航天时代光电科技有限公司 | It is a kind of for quickly detecting the fexible unit and method of electric connector |
| CN111044816B (en) * | 2019-12-03 | 2022-07-05 | 中国船舶重工集团公司第七0九研究所 | Method and device for testing technical conditions of channels of multi-channel system |
| CN111505458B (en) * | 2020-05-07 | 2022-10-11 | 北京无线电测量研究所 | Insulation resistance and electric strength detection system and detection method |
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| CN113341281A (en) * | 2021-05-13 | 2021-09-03 | 北京电子工程总体研究所 | Multifunctional cable detector |
| CN113534016A (en) * | 2021-05-31 | 2021-10-22 | 北京航天光华电子技术有限公司 | Self-learning test system and method suitable for tester |
| CN113848422B (en) * | 2021-09-22 | 2023-04-18 | 中国商用飞机有限责任公司 | Cable conduction testing device |
| CN113960518A (en) * | 2021-10-14 | 2022-01-21 | 中车长春轨道客车股份有限公司 | Band knob type address calibration device and calibration method |
| CN116256543B (en) * | 2023-05-15 | 2023-08-01 | 广东电网有限责任公司佛山供电局 | System for shielding and measuring insulation resistance of 10kV cable |
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| CN101750564A (en) * | 2008-11-27 | 2010-06-23 | 王欣鹏 | Multi-core cable tester |
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