CN117517891A - Method for testing insulativity by utilizing one-to-many step-down algorithm - Google Patents
Method for testing insulativity by utilizing one-to-many step-down algorithm Download PDFInfo
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- CN117517891A CN117517891A CN202311473772.2A CN202311473772A CN117517891A CN 117517891 A CN117517891 A CN 117517891A CN 202311473772 A CN202311473772 A CN 202311473772A CN 117517891 A CN117517891 A CN 117517891A
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- 238000012360 testing method Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009413 insulation Methods 0.000 claims abstract description 46
- 238000010586 diagram Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 5
- 238000010998 test method Methods 0.000 abstract description 4
- 238000004590 computer program Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010845 search algorithm Methods 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a method for testing insulativity by utilizing a one-to-many step-down algorithm, which is characterized in that insulation testing is carried out between a target core wire and a remaining core wire set in a non-connection relation after a set which does not need repeated traversal is removed from a core wire set in a non-connection relation of a target core wire to be tested. Therefore, the action times of the relay are greatly reduced under the condition of maintaining a faster test rate and complete test coverage rate. The invention has strong logic, easy realization of computer programs and better universality, and can be applied to automatic test equipment; the insulation test method of one-to-many step-down is adopted, so that the action times of the relay can be effectively reduced, the service life of the equipment and the test efficiency are greatly improved, the whole coverage is realized during the test, and the method can be widely applied to the rapid insulation test of the cable; in addition, the invention can also realize the rapid positioning of the cable insulation fault and plays a role in cable maintenance.
Description
Technical Field
The invention belongs to the technical field of cable testing, and particularly relates to a method for testing insulativity by using a one-to-many step-down algorithm.
Background
The cable is widely applied to various industries such as military industry, electric power, communication, traffic and the like. In particular in the military industry, the reliability of cables is the most basic requirement for ensuring stable operation of the weapon equipment, which may cause significant losses once problems arise due to the insulation of the cables in the weapon equipment. Because the cable has the characteristics of diversified interfaces and complex wiring relation, the more and more complex the number of cable core wires for the weapon equipment, the lower the traditional manual testing efficiency and the high error rate are when the core-core insulation test is carried out, and the automatic intelligent cable testing equipment is generally adopted for cable insulation test at present.
At present, a quick insulation test method adopted in automatic intelligent cable test equipment is mature, a method of 'one core to multiple cores' is generally adopted, one core is a current tested core, multiple cores are core wire sets which are not related to the tested core, and related search algorithms such as a non-related search algorithm and the like exist. Insulation test is performed between the target core wire and the core wire set in non-connection relation, and the core wire insulation index can be obtained rapidly. The method accelerates the insulation test speed, but has certain defects in engineering application: the relay connected with the multi-core end has excessive action times.
The reed relay or electromagnetic relay has a characteristic of not affecting insulation test accuracy due to no leakage current, and is generally used as an element for switching a path of an automated intelligent cable test apparatus. The mechanical life of the relay is limited, namely the action times are 10 in general 6 ～10 7 And twice. Excessive number of actions of the relay can affect the overall life of the cable test device. However, the related algorithm is still deficient, so a one-to-many step-down algorithm needs to be constructed: after the uncorrelated set of cable cores is known, by applying the algorithm, the control reduces the action times of the relay (namely reduces the number of times of traversing the uncorrelated set), so that the service life of the cable test equipment can be prolonged.
Disclosure of Invention
In order to solve the above-mentioned problems of the prior art, the present application proposes a method for testing insulation by using a one-to-many step-down algorithm, comprising the following steps:
determining a connection relation between two ports of a tested cable;
the insulation of each core to be tested of one port of the cable to be tested from the other port is measured in turn.
Further, the connection relation between the two ports of the tested cable is established according to the circuit diagram or the wiring diagram of the cable.
Further, the connection relationship between two ports of the tested cable specifically includes:
when the correct communication relation of the tested cable is determined, selecting any core wire at the first end of the tested cable as a tested core;
according to the communication relation, all the core wires of the second end of the tested cable, which are not conducted with the tested core, can be known.
Further, sequentially measuring the insulation between each core to be measured and another port of one of the ports of the cable to be measured specifically includes:
selecting one of the cores at the A end of the cable to be tested as A-1, determining all the cores at the B end of the cable to be tested, which are theoretically non-conductive with A-1, as B X, and then measuring the insulativity between A-1 and B X;
continuously selecting another core to be measured of the end A of the cable to be measured as A-2, determining that all core wires which are theoretically conducted between the end B of the cable to be measured and the end A-2 are B-Y; removing B < Y > from B < X >, the remainder being denoted as B < X '>, and then measuring the insulation between A-2 and B < X' >;
continuously selecting another core to be measured of the end A of the cable to be measured as A-3, determining that all core wires which are theoretically conducted between the end B of the cable to be measured and the end A-3 are B-Z; b < Z > is removed from B < X ' ], the remainder is denoted as B < X ' ], and then the insulation between A-3 and B < X ' ] is measured;
and continuing the steps until reaching the preset condition and stopping.
Further, the preset conditions specifically include:
to-be-tested set B X 'of B end of tested cable' … ’]Is an empty set.
Compared with the prior art, the invention has the beneficial effects that:
the invention has strong logic, easy realization of computer programs and better universality, and can be applied to automatic test equipment; the insulation test method of one-to-many step-down is adopted, so that the action times of the relay can be effectively reduced, the service life of the equipment and the test efficiency are greatly improved, the whole coverage is realized during the test, and the method can be widely applied to the rapid insulation test of the cable; in addition, the invention can also realize the rapid positioning of the cable insulation fault and plays a role in cable maintenance.
Drawings
FIG. 1 is a schematic block diagram of a cable insulation test of the present invention;
fig. 2 is a schematic diagram of a typical cable connection relationship.
Detailed Description
The present invention will be further described with reference to the drawings and the detailed description below, so that those skilled in the art can better understand the technical solutions of the present invention.
As shown in fig. 1, under the premise of ensuring a faster test rate and complete test coverage rate on the premise of knowing all core wire sets with non-connection relation with the tested target core wire, the invention provides a one-to-many step-down algorithm for greatly reducing the action times of a multi-core terminal relay: and removing the set which does not need repeated traversal from the core wire set of the non-connection relation of the target core wire to be tested, and performing insulation test between the target core wire and the core wires of the rest non-connection relation to quickly obtain the core wire insulation index.
A block diagram of the hardware of the cable test is shown in fig. 1. The tested cable is connected to the test circuit through the relay array by the transfer cable, and the test of each core wire of the cable can be realized by closing different relay combinations connected to the two ends of A, B to be connected to the test circuit.
Fig. 2 is a schematic diagram of a typical cable connection relationship, where the A1 core of the connector is connected to the B1 core of the connector, A2 is connected to B3, A3 is connected to B2, A4 is connected to B4, B5, A5 is connected to B5, and A5 is connected to B4 due to A4. The typical cable covers the main wiring relation types of 1-to-1 connection interconnection, cross interconnection, 1-to-multiple interconnection and the like of the tested cable.
Assuming that the connector a is connected to the relay array at the end a of the inspection station through the transfer cable, and the connector B is connected to the relay array at the end B of the inspection station through the transfer cable, the numbers A1 to A5 and B1 to B5 respectively represent the numbers of the relays at the two ends A, B.
By establishing a cable connection relation description table and manufacturing a transfer cable, the test of different tested cables can be realized. A cable connection relationship description table, such as table 1, is created in accordance with fig. 2, in which connection relationships of core wires at both ends are described.
Table 1, cable connection relationship description table
The set of unassociated core wires of the target core wire is shown in table 2.
TABLE 2 non-associated core set description table for target core
| Sequence number | Target core wire | Non-associated core wire set | Remarks |
| 1 | A1 | B2、B3、B4、B5 | |
| 2 | A2 | B1、B2、B4、B5 | |
| 3 | A3 | B1、B3、B4、B5 | |
| 4 | A4 | B1、B2、B3 | |
| 5 | A5 | B1、B2、B3 |
Conventional rapid insulation testing methods: the insulation property of the target core wire A1 of the connector A is measured, A1, B2, B3, B4 and B5 are connected into a measuring circuit, the insulation property of A2 is measured, A2, B1, B2, B4 and B5 are connected into the measuring circuit, and the like.
The invention relates to a one-to-many gradual descent algorithm idea: since A1 and B1 are communicated, A2 and B3 are communicated, and insulation between A1 and B3 is tested, and simultaneously, insulation between A2 and B1 is also tested. Therefore, in testing the insulation of A2, it is not necessary to repeat the test of the insulation of A2 and B1.
Taking five tested cores as an example, the testing method of the application specifically comprises the following steps:
all cores { B2, B3, B4 and B5} of which the first core A1 and the B end are not conducted with the A1 core at the A end are connected with the A1 and { B2, B3, B4 and B5} into a test circuit; after the insulation test between A1 and { B2, B3, B4 and B5} is completed, disconnecting A1 from the test circuit, and keeping { B2, B3, B4 and B5} to be connected to the test circuit;
taking a second core A2 to be tested at the A end, wherein all cores conducted with the A2 are { B3}, and removing B3 from { B2, B3, B4 and B5}, namely disconnecting the B3 from the test circuit; after the insulation test between A2 and { B2, B4 and B5} is completed, the connection between A2 and the test circuit is disconnected, and { B2, B4 and B5} is kept to be connected to the test circuit;
taking a third core A3 to be tested at the A end, wherein all cores conducted with the A3 are { B2}, and removing B2 from { B2, B4 and B5}, namely disconnecting B2 from a test circuit; after the insulation test between A3 and { B4, B5} is completed, disconnecting A3 and the test circuit, and { B4, B5} keeps accessing the test circuit;
taking a fourth core A4 to be tested at the A end, wherein all cores conducted with the A4 are { B4 and B5}, and removing the B4 and the B5 from the { B4 and the B5}, namely disconnecting the B4 and the B4 from the test circuit; because the B-end to-be-tested set is empty at this time, the test is not needed;
and taking the fifth tested core A5 at the end A, wherein the set to be tested at the end B is empty, and the test is finished.
The relay action time sequence in the embodiment is shown in table 3, and each relay at the end B only performs 1 turn-off action in the whole test process.
TABLE 3 Relay action time schedule Using one-to-many step-down algorithm
The action sequence of the conventional rapid insulation test relay is shown in table 4, wherein B1, B2 and B3 respectively need to execute the opening and closing actions for 4 times, and B4 and B5 respectively need to execute the opening and closing actions for 3 times.
TABLE 4 conventional fast insulation test Relay action time Meter
The cable connectors in fig. 2 have fewer relationships, and if the connection relationships are more, the difference of the operation times becomes more obvious, and if the connection relationships are 100, the difference of the operation times is nearly hundred times.
Compared with the conventional rapid insulation test method, the method has the advantages that a one-to-many step-down algorithm is used, insulation test is carried out between the target core wire and the remaining core wire set in the non-connection relation after the core wire set in the non-connection relation of the target core wire to be tested is removed from the core wire set in the non-connection relation of the target core wire to be tested, the action times of the relay are greatly reduced under the condition that the rapid test rate and the complete test coverage rate are maintained, and the service life of test equipment is prolonged.
In summary, the present invention is not limited to the preferred embodiments, but is intended to cover modifications and equivalent arrangements included within the scope of the appended claims and their equivalents.
Claims (5)
1. A method for testing insulation using a one-to-many step-down algorithm, comprising the steps of:
determining a connection relation between two ports of a tested cable;
the insulation of each core to be tested of one port of the cable to be tested from the other port is measured in turn.
2. The method for testing insulation using a one-to-many step-down algorithm according to claim 1, wherein: the connection relation between two ports of the tested cable is established according to the circuit diagram or the wiring diagram of the cable.
3. The method for testing insulation by using a one-to-many step-down algorithm according to claim 2, wherein the connection relationship between two ports of the tested cable specifically comprises:
when the correct communication relation of the tested cable is determined, selecting any core wire at one end of the tested cable as a tested core;
according to the communication relation, all the core wires of the second end of the tested cable, which are not conducted with the tested core, can be known.
4. A method for testing insulation using a one-to-many step-down algorithm according to claim 3, wherein sequentially measuring the insulation of each core under test of one port of the cable under test from another port comprises:
selecting one of the cores at the A end of the cable to be tested as A-1, determining all the cores at the B end of the cable to be tested, which are theoretically non-conductive with A-1, as B X, and then measuring the insulativity between A-1 and B X;
continuously selecting another core to be measured of the end A of the cable to be measured as A-2, determining that all core wires which are theoretically conducted between the end B of the cable to be measured and the end A-2 are B-Y; removing B < Y > from B < X >, the remainder being denoted as B < X '>, and then measuring the insulation between A-2 and B < X' >;
continuously selecting another core to be measured of the end A of the cable to be measured as A-3, determining that all core wires which are theoretically conducted between the end B of the cable to be measured and the end A-3 are B-Z; b < Z > is removed from B < X ' ], the remainder is denoted as B < X ' ], and then the insulation between A-3 and B < X ' ] is measured;
and continuing the steps until reaching the preset condition and stopping.
5. The method for testing insulation using a one-to-many step-down algorithm according to claim 4, wherein the predetermined conditions specifically include:
to-be-tested set B X 'of B end of tested cable' … ’]Is an empty set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311473772.2A CN117517891A (en) | 2023-11-07 | 2023-11-07 | Method for testing insulativity by utilizing one-to-many step-down algorithm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311473772.2A CN117517891A (en) | 2023-11-07 | 2023-11-07 | Method for testing insulativity by utilizing one-to-many step-down algorithm |
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| CN202311473772.2A Pending CN117517891A (en) | 2023-11-07 | 2023-11-07 | Method for testing insulativity by utilizing one-to-many step-down algorithm |
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