CN102854430B - Method and system for testing swinging cross or breaking of multi-core cable - Google Patents
Method and system for testing swinging cross or breaking of multi-core cable Download PDFInfo
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- CN102854430B CN102854430B CN201110180639.9A CN201110180639A CN102854430B CN 102854430 B CN102854430 B CN 102854430B CN 201110180639 A CN201110180639 A CN 201110180639A CN 102854430 B CN102854430 B CN 102854430B
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Abstract
The invention discloses a method and a system for testing swinging cross or breaking of a multi-core cable. The method includes the steps of A, selecting a one cable core of a tested cable and performing a continuity test by respectively connecting two ends of the cable core on a testing channel of a continuity tester; B, selecting another cable core and repeating the step A until continuity tests for all cable cores are finished; C, selecting one pair of cable cores of the tested cable and respectively connecting one ends thereof on a test channel of a capacitance unbalance tester to test capacitance difference of the pair of the cable cores relative to other cable cores and a metal sheath; D, selecting another pair of cable cores and repeating the step C until all capacitance unbalance tests for the cable cores are finished; E, selecting cable core pairs with abnormal test results obtained in the step C and the step D, combining the cable cores two by two, respectively connecting one ends on the continuity tester to finish the continuity test between two random cable cores, obtaining result of the swinging cross, and then recording the result.
Description
Technical field
The present invention relates to the measuring technology of cable, being specifically related to a kind of method and system for testing polycore cable swinging cross, broken string.
Background technology
In cable production run, due to various improper reason, cause the abnormal (swinging cross) between cable core or between cable core and protective metal shell sometimes, or the improper fracture (broken string) of cable core, thus great trouble is caused to the actual use of cable.Therefore mixed, the broken string test of cable are the necessary conditions ensureing that cable normally uses.The mode that cable mixed in the past, combination of two test conduction is generally taked in test of breaking.By all cable core combination of two (protective metal shell is also as an independent core), then test the conduction status of various combination successively.This method is little for little pair count cable tests affect, but when cable core number is more, its testing efficiency just seems lower.For 100 cores (50 to) cable, its various combination reaches 5050 (100*101/2) and plants, and that is system need test 5050 times.And cable core number is more, its testing efficiency is lower.
Mixed, broken string conventional test methodologies as shown in Figure 1, the two ends of tested cable 7 are connected respectively to the Wiring port 51 of near-end switch 5 and the Wiring port 61 of far-end switch 6, every root cable core of tested cable 7 is all connected on a Wiring port, on off test instrument (Single Chip Microcomputer (SCM) system) 2 controls near-end switch 5 and far-end switch 6 by control signal wire 12, be connected with near-end public passage 3 by near-end cable core, a cable core of far-end is connected with far-end public passage 4.Near-end public passage 3 is connected with on off test instrument 2 with far-end public passage 4.Obtained mixed, the broken string result of tested cable by the combination of two of testing all cable cores, then send computing machine 1 to by communication port 11.This method is due to for each root near-end cable core, and far-end all needs to carry out N time successively and selects, so the mixed broken string test completing N core cable needs to combine for N* (N+1)/2 time.Therefore, for Multi-core number cable, the testing efficiency of this conventional test methodologies is very low.
Summary of the invention
The technical problem to be solved in the present invention is to provide one polycore cable swinging cross more efficiently, broken string method of testing.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of polycore cable swinging cross, broken string method of testing, comprise the following steps:
A. select a cable core of tested cable, the two ends of this root cable core are connected in the test channel of on off test instrument, self on off test is carried out to this root cable core;
B. select another root cable core, repeat above-mentioned steps A, until complete the on off test of all cable cores, obtain broken string test result and record;
C. select a pair cable core of tested cable, one end of this pair cable core is connected in the test channel of capacitance unbalance tester, test the capacitance difference of this pair cable core relative to all the other cable cores and protective metal shell;
D. select other a pair cable core, repeat above-mentioned steps C, until complete the capacitive unbalance to earth test of all cable cores, and logging test results;
E. the cable core pair of all test result exceptions in above-mentioned steps C, D is selected, by cable core combination of two wherein, and one end of these two cable cores is connected in the test channel of on off test instrument, complete the on off test between any two cable cores, obtain swinging cross test result and record.
Preferably, the cable core at tested cable two ends is connected on the Wiring port of switching device shifter, the connection of automatically switched by switching device shifter each cable core and on off test instrument, capacitance unbalance tester.
Further, described switching device shifter is connected with computing machine directly or indirectly, is controlled the switching action of switching device shifter by computing machine.
Preferably, described on off test instrument, capacitance unbalance tester are all connected with computing machine, by computer recording test result.
Another technical matters that the present invention will solve is to provide a kind of polycore cable swinging cross, the broken string test macro of applying above-mentioned method of testing.
This test macro comprises with lower part: near-end switch, comprises multiple Wiring port; Far-end switch, comprises multiple Wiring port; Switch controller, is connected with described near-end switch, far-end switch respectively by control signal wire; Switch controller is also connected with near-end switch by a near-end public passage, is connected with far-end switch by a far-end public passage; On off test instrument, is connected with switch controller by the first test channel, the second test channel; Capacitance unbalance tester, is connected with switch controller by the 3rd test channel, the 4th test channel; Computing machine, is connected with switch controller with described on off test instrument, capacitance unbalance tester respectively by communication port.
Preferably, described switch controller is Control matrix.
Preferably, described near-end switch, far-end switch are relay matrix switcher.
Preferably, described computing machine is connected with switch controller with described on off test instrument, capacitance unbalance tester by serial ports.
Compared with prior art, the present invention can improve the testing efficiency of cable significantly.Owing to present invention employs on off test and capacitive unbalance to earth tests the mode combined, only need to carry out on off test to the cable core combination of two of capacitive unbalance to earth test result exception, all the other cable cores only need through an on off test and a capacitance balancing test, therefore the number of times of test is greatly reduced, improve testing efficiency, for the cable that core number is more, good effect of the present invention is very significant.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the schematic diagram of a kind of existing cable swinging cross, broken string test macro.
Fig. 2 is the schematic diagram of a kind of polycore cable swinging cross of the present invention, broken string test macro.
Embodiment
As shown in Figure 2, test macro of the present invention comprises near-end switch 5 and a far-end switch 6, and wherein, near-end switch 5 comprises multiple Wiring port 51, for being connected with the cable core of tested cable 7 near-end; Far-end switch 6 comprises multiple Wiring port 61, for being connected with the cable core of tested cable 7 far-end.
Near-end switch 5, far-end switch 6 are connected with switch controller 9 respectively by control signal wire 12, and switch controller 9 is also connected with near-end switch 5 by a near-end public passage 3, are connected with far-end switch 6 by a far-end public passage 4.
Switch controller 9 is connected with on off test instrument 2 by the first test channel 21, second test channel 22, is connected with capacitance unbalance tester 8 by the 3rd test channel 81, the 4th test channel 82.
Computing machine 1 is connected with switch controller 9 with on off test instrument 2, capacitance unbalance tester 8 respectively by communication port 11 (such as serial ports).Wherein, switch controller 9 is the Control matrix controlled by computing machine 1.
The effect of near-end switch 5 (or far-end switch 6) be by many cable cores being connected on its Wiring port 51 (or 61) alternatively with public passage 3 (or 4) conducting, therefore they can be the devices that relay matrix switcher etc. has similar functions.
Polycore cable swinging cross of the present invention, broken string method of testing comprise the following steps:
Steps A. select a cable core of tested cable, the two ends of this root cable core are connected in the test channel of on off test instrument, self on off test is carried out to this root cable core.
This step can manually complete, and such as the direct two ends by a cable core are connected in the test channel of on off test instrument, then test.
But more conveniently adopt the said apparatus shown in Fig. 2, on each Wiring port 51 in advance whole cable cores of tested cable 7 one end being connected to near-end switch 5, (numbering is respectively 1 ... N), again by corresponding for the cable core of the other end each Wiring port 61 being connected to far-end switch 6, (numbering is respectively 1 ... N), Wiring port 51 and 61 is numbered the two ends of the corresponding same cable core of identical port, then utilize switching device shifter (as near-end switch 5, far-end switch 6 and switch controller 9) automatic switchover, can the two ends of a certain cable core be connected in the test channel of on off test instrument, then on off test is carried out.
Step B. selects another root cable core, repeats above-mentioned steps A, until complete the on off test of all cable cores, obtains broken string test result and record.For N root cable core, on off test needs test N time altogether.
This test result can manual record, also on off test instrument can be connected with computing machine and by the automatic record of computing machine.
After the on off test of each root cable core of step C. self completes, select a pair cable core of tested cable again, one end of this pair cable core is connected in the test channel of capacitance unbalance tester, tests the capacitance difference of this pair cable core relative to all the other cable cores and protective metal shell.
This step can manually complete, and such as direct one end by a pair cable core is connected in the test channel of capacitance unbalance tester, then tests.
But more conveniently adopt the said apparatus shown in Fig. 2, described in steps A, in advance whole cable cores at tested cable 7 two ends are connected on each Wiring port 51 (or each Wiring port 61 of far-end switch 6) of near-end switch 5, then the automatic switchover of switching device shifter is utilized, one end of certain a pair cable core (such as Wiring port 51 being numbered one end of 1,2) can be connected in the test channel of capacitance unbalance tester, then carry out capacitive unbalance to earth test.Switching device shifter can be connected with computing machine directly or indirectly, is controlled the switching action of switching device shifter by computing machine.
Capacitive unbalance to earth test can according to standard GB/T 5441.3-85, and the regulation of " telecommunication cable test method capacitive coupling and capacitive unbalance to earth test " is carried out.The test philosophy of capacitive unbalance to earth is line to A, B core respectively to the capacitance difference of all the other cores of cable and protective metal shell, if there is sleet jump, its test result must be abnormal.
Step D. selects other a pair cable core, repeats above-mentioned steps C, until complete the capacitive unbalance to earth test of all cable cores, and logging test results.For N root cable core, because capacitive unbalance to earth test is pairwise testing, therefore need test N/2 time altogether.
Test result can manual record, also capacitance unbalance tester can be connected with computing machine and by the automatic record of computing machine.
Step e. select the cable core pair of all test result exceptions in above-mentioned steps C, D, by cable core combination of two wherein, and one end of these two cable cores is connected in the test channel of on off test instrument, complete the on off test between any two cable cores, obtain swinging cross test result and record.
Suppose that total n is abnormal to cable core capacity unbalance test result, so need combination of two to carry out the number of times of on off test, from 2n, namely appoint the number of combinations of getting 2
generally, in whole N root cable core, the cable core quantity that swinging cross occurs is little, namely 2n < < N (2n is much smaller than N), therefore,
it is a very little number.
Like this, complete whole test of the present invention, need altogether
secondary, for the cable that core number is more, testing time will far less than existing methodical N* (N+1)/2 time.For 100 cores (50 to) cable, suppose that tested cable has 2 pairs of cable core swinging cross (2 pairs of cable core capacity unbalance tests are abnormal to having), then need 100 on off tests, 50 capacity unbalance tests, 6 (4*3/2) abnormal wire to combination of two on off test altogether, totally 156 tests.And need nearly 5050 (100*101/2) secondary test by classic method.
Claims (8)
1. polycore cable swinging cross, a broken string method of testing, is characterized in that, comprise the following steps:
A, select a cable core of tested cable, the two ends of this root cable core are connected in the test channel of on off test instrument, self on off test is carried out to this root cable core;
B, select another root cable core, repeat above-mentioned steps A, until complete the on off test of all cable cores, obtain broken string test result and record;
C, select a pair cable core of tested cable, one end of this pair cable core is connected in the test channel of capacitance unbalance tester, test the capacitance difference of this pair cable core relative to all the other cable cores and protective metal shell;
D, select other a pair cable core, repeat above-mentioned steps C, until complete the capacitive unbalance to earth test of all cable cores, and logging test results;
The cable core pair of all test result exceptions in E, selection above-mentioned steps C, D, by cable core combination of two wherein, and one end of these two cable cores is connected in the test channel of on off test instrument, complete the on off test between any two cable cores, obtain swinging cross test result and record.
2. method of testing according to claim 1, is characterized in that, the cable core at tested cable two ends is connected on the Wiring port of switching device shifter, the connection of automatically switched by switching device shifter each cable core and on off test instrument, capacitance unbalance tester.
3. method of testing according to claim 2, is characterized in that, described switching device shifter is connected with computing machine directly or indirectly, is controlled the switching action of switching device shifter by computing machine.
4. method of testing according to claim 1, is characterized in that, described on off test instrument, capacitance unbalance tester are all connected with computing machine, by computer recording test result.
5., for realizing a test macro for polycore cable swinging cross described in claim 1, broken string method of testing, it is characterized in that, comprise with lower part:
Near-end switch (5), comprises multiple Wiring port (51);
Far-end switch (6), comprises multiple Wiring port (61);
Switch controller (9), is connected with described near-end switch (5), far-end switch (6) respectively by control signal wire; Switch controller (9) is also connected with near-end switch (5) by a near-end public passage (3), is connected with far-end switch (6) by a far-end public passage (4);
On off test instrument (2), is connected with switch controller (9) by the first test channel (21), the second test channel (22);
Capacitance unbalance tester (8), is connected with switch controller by the 3rd test channel (81), the 4th test channel (82);
Computing machine (1), is connected with switch controller (9) with described on off test instrument (2), capacitance unbalance tester (8) respectively by communication port.
6. test macro according to claim 5, is characterized in that, described switch controller (9) is Control matrix.
7. test macro according to claim 5, is characterized in that, described near-end switch (5), far-end switch (6) are relay matrix switcher.
8. test macro according to claim 5, is characterized in that, described computing machine (1) is connected with switch controller (9) with described on off test instrument (2), capacitance unbalance tester (8) by serial ports.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110180639.9A CN102854430B (en) | 2011-06-29 | 2011-06-29 | Method and system for testing swinging cross or breaking of multi-core cable |
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| CN201110180639.9A CN102854430B (en) | 2011-06-29 | 2011-06-29 | Method and system for testing swinging cross or breaking of multi-core cable |
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| Publication Number | Publication Date |
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| CN102854430A CN102854430A (en) | 2013-01-02 |
| CN102854430B true CN102854430B (en) | 2015-01-21 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104914332A (en) * | 2015-05-28 | 2015-09-16 | 江西洪都航空工业集团有限责任公司 | Man-machine interactive type testing method for multi-core cable |
| CN105301408A (en) * | 2015-11-17 | 2016-02-03 | 中国神华能源股份有限公司 | Cable fault monitoring method, device and system |
| CN107271854B (en) * | 2017-07-28 | 2023-08-29 | 北京航天光华电子技术有限公司 | Dual-redundancy equipotential cable network mixed wire testing device and testing method |
| JP6947072B2 (en) * | 2018-02-15 | 2021-10-13 | 日立金属株式会社 | Multi-core cable inspection method, multi-core cable assembly manufacturing method, and multi-core cable inspection equipment |
| CN111830452B (en) * | 2020-07-22 | 2023-05-23 | 云南电网有限责任公司电力科学研究院 | Method and simulation equipment for verifying reliability of double-end ranging positioning formula |
| CN112230165A (en) * | 2020-09-22 | 2021-01-15 | 卡斯柯信号有限公司 | Mixed line test circuit |
| CN113391098B (en) * | 2021-06-15 | 2023-04-07 | 贵州电网有限责任公司 | Optical difference protection coaxial cable channel control device and control method thereof |
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| CN2289249Y (en) * | 1996-10-19 | 1998-08-26 | 薛茂林 | Communication cable failure detector |
| CN200986582Y (en) * | 2006-12-20 | 2007-12-05 | 孙社文 | Communication cable integration integrated test device |
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