CN112305371A - Cable network testing device, system and method suitable for spacecraft - Google Patents
Cable network testing device, system and method suitable for spacecraft Download PDFInfo
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- CN112305371A CN112305371A CN202010980903.6A CN202010980903A CN112305371A CN 112305371 A CN112305371 A CN 112305371A CN 202010980903 A CN202010980903 A CN 202010980903A CN 112305371 A CN112305371 A CN 112305371A
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
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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
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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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
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Abstract
One embodiment of the invention discloses a device, a system and a method suitable for testing a spacecraft cable network, which comprise the following steps: the cable contact spreading device is used for amplifying the tested contact of the connector in the tested cable network; the adapter cable is used for connecting the cable contact unfolding device and a tested cable network; and the short-circuit plug is used for short-circuiting the cable contact unfolding device. The testing method designed by the invention effectively solves the insulation testing problem among a plurality of connectors by means of the cable contact spreading device. The cable testing method is flexible, simple and easy to operate, and can be suitable for testing any complex cable network.
Description
Technical Field
The invention relates to the field of cable testing. And more particularly to a cable network testing device, system and method suitable for use in spacecraft.
Background
The aerospace engineering system has high cost and high risk, and has strict requirements on reliability and safety. For spacecraft engineering, the primary condition for ensuring reliability is to ensure the safety and reliability of interconnection of hardware equipment, power supply access and signal transmission, namely to ensure the reliability of a cable network system and prevent access errors, short circuit between connector contacts and a shell, joint rosin joints and lap joint faults. Therefore, the test of a cable network system is very important after the cable is developed and assembled, before the cable is assembled and after long-distance transportation.
The cable network performance test is mainly divided into a conduction test and an insulation test. The conduction test is used for checking the corresponding relation of the spacecraft cable network access, ensuring the correctness of the access by measuring the point-to-point resistance value and providing a basis for calculating the voltage drop of the power supply access. The insulation test is to verify the insulation capability of the cable under transient high voltage generated by equipment failure (overvoltage) by applying high voltage between non-communicated contacts, and whether the cable has failures such as moisture, aging, overlapping and other local defects can be preliminarily judged through the insulation test.
In order to reduce the weight of cables and save the wiring space of the spacecraft, the integration level of the development of a spacecraft cable network is higher, and the complexity of the cable network is increased, for example, a certain spacecraft model is taken, a main cable in a service cabin comprises 50 connectors, the connection relationship is close to 900 loops, and the test difficulty of the complex cable is very high.
Disclosure of Invention
In view of the above, a first embodiment of the present invention provides a spacecraft cable network test apparatus, including:
the cable contact spreading device is used for amplifying the tested contact of the connector in the tested cable network;
the adapter cable is used for connecting the cable contact unfolding device and a tested cable network;
and the short-circuit plug is used for short-circuiting the cable contact unfolding device.
In one embodiment, the cable contact deployment device comprises: a first public end, a second public end, an upper row of jacks, a lower row of jacks and a toggle switch, wherein,
the first public end is connected with the upper row of jacks through leads, and the second public end is connected with the lower row of jacks through leads;
a toggle switch is arranged between the upper row of jacks and the lower row of jacks, when the toggle switch is closed, the upper row of jacks is communicated with the lower row of jacks, and when the toggle switch is disconnected, the upper row of jacks is disconnected with the lower row of jacks;
the upper row of jacks and the lower row of jacks are equal in number and are in one-to-one correspondence in position.
In one particular embodiment, the patch cable includes:
the adapter end is connected with the tested cable network, and the common end is connected with the cable contact unfolding device.
In a particular embodiment, the shorting plug includes a test port for connection to a cable contact deployment device and a connection port for connection to test equipment.
A second embodiment of the present invention provides a cable network testing system for a spacecraft, comprising:
according to the use of the device according to any of the first embodiments;
the testing device comprises a first testing end and a second testing end and is used for testing whether the tested contact is normal or not.
A third embodiment of the present invention provides a method for testing a spacecraft cable network, including:
judging the type of the tested cable network;
selecting a test requirement according to the type of the tested cable network;
and selecting a proper test method according to the test requirement, and judging whether the tested network is normal by using the test device according to the test method.
In a specific embodiment, the type of the cable network to be tested includes: multiple cables, a single connector, multiple connectors.
In a specific embodiment, the selecting the test requirement according to the type of the cable network to be tested includes:
when the tested cable network is a plurality of cables, whether the cables are conducted or not needs to be tested;
when the tested cable network is a single connector, whether each connector in the single connector is insulated or not needs to be tested;
when the cable network to be tested is a plurality of connectors, it is necessary to test whether the plurality of connectors are insulated.
In a specific embodiment, the selecting a suitable testing method according to the testing requirement includes:
when the tested cable network is a plurality of cables, respectively selecting matched switching cables according to the test ports of the plurality of cables, respectively connecting the adaptive ends of the switching cables with the test ports of the plurality of cables, respectively connecting the common ends with the first common ends or the second common ends of the plurality of cable contact unfolding devices, respectively connecting the test ends of the test devices with the upper row of jacks or the lower row of jacks corresponding to the first common ends or the second common ends of the plurality of cable contact unfolding devices, and judging whether the plurality of cables are conducted according to the test result displayed by the test equipment;
when the tested cable network is a single connector, selecting a matched adapter cable according to the test port of the single connector, connecting the adaptive end of the adapter cable with the test port of the single connector, connecting the common end with the first common end of the cable contact spreading device, connecting the second common end of the cable contact spreading device with a matched short-circuit plug, disconnecting the toggle switches except for the first upper row of jacks and the first lower row of jacks, closing the other toggle switches, connecting the first test end of the test equipment with the first upper row of jacks, connecting the second test end with the test end of the short-circuit plug, judging whether the first plug-in point in the single connector is insulated according to the test result displayed by the test equipment, disconnecting the toggle switches between the second upper row of jacks and the second lower row of jacks, connecting the first test end of the test equipment with the second upper row of jacks and connecting the second test end of the short-circuit plug, and sequentially carrying out insulation test until the last row jack test is finished, namely the test is finished.
In a specific embodiment, the selecting a suitable testing method according to the testing requirement further includes:
when the tested cable network is a plurality of connectors, matched adapter cables are selected according to the test ports of the connectors, the adaptive ends of the adapter cables are respectively connected with the test ports of the connectors, the public ends are respectively connected with the first public ends of the cable contact unfolding devices, the second public ends of the cable contact unfolding devices are respectively connected with matched short-circuit plugs, toggle switches are switched on, the first test end of the test equipment is connected with the test end of the short-circuit plug of the tested connector, the second test end of the test equipment is connected with the test end of the short-circuit plug of the other tested connector, whether the tested connector is insulated from the other tested connector is judged according to the test result displayed by the test equipment, and then the test equipment is used for sequentially carrying out insulation test on the rest tested connectors until the test among all the connectors is finished.
The invention has the following beneficial effects:
the invention can lead out all the contacts in the cable network for testing by utilizing the matched adapter cable, so that the cable testing is simple and easy to operate, and the cable damage possibly caused by directly operating the cable connector is avoided. The efficiency of the insulation test of the cable can be greatly improved, the traditional insulation test only can carry out one-to-one insulation test on the contacts on the connector, and for example, the insulation test between the contacts on a single connector is carried out, if n contacts are arranged on the connector, when a short-circuit plug is not used, the insulation test needs to be carried out for n + (n-1) + (n-2) … … +3+2 times, but by utilizing the method of the invention, the insulation test only needs to be carried out for n-1 times, the conduction test of complex cables (one end to multiple ends and multiple ends to multiple ends) is solved, the multiple parallel point relations on the multiple connectors can be tested at one time by connecting a plurality of cable contact spreading devices, the test complexity is reduced, the insulation test of the complex cables (one end to multiple ends and multiple ends to multiple ends) is also solved, the traditional insulation test method is difficult to carry out the insulation test among the multiple connectors in the same cable, the testing method provided by the invention effectively solves the insulation testing problem among a plurality of connectors by means of the adapter switch and the short-circuit plug. The cable testing method is flexible, simple and easy to operate, and can be suitable for testing any complex cable network.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 shows a schematic diagram of a spacecraft cable network test system in which an embodiment of the invention can be implemented.
Fig. 2 shows a schematic diagram of a spacecraft cable network test equipment suitable for use in accordance with an embodiment of the present invention.
Fig. 3 shows a flowchart of a method for testing a spacecraft cable network according to an embodiment of the present invention.
Fig. 4 shows a cable continuity test diagram of an embodiment of the present invention.
FIG. 5 shows a schematic diagram of a single inter-connector insulation test according to one embodiment of the present invention.
FIG. 6 is a schematic diagram illustrating insulation testing between multiple connectors according to one embodiment of the present invention
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Embodiment 1-A Cable network test device and System for spacecraft
As shown in fig. 1, a cable network testing system for spacecraft comprises: the method is suitable for the spacecraft cable network test equipment 10 and the test device 20.
As shown in fig. 2, the spacecraft cable network test equipment 10 includes: a cable contact deployment device 101, a patch cable 103, and a shorting plug 105.
The cable contact spreading device 101 includes a first common end 1011, a second common end 1013, an upper row of insertion holes 1015, a lower row of insertion holes 1017 and a toggle switch 1019 for amplifying the tested contacts of the connectors in the tested cable network.
The upper row of jacks 1015 includes a first jack, a second jack, a third jack, and so on, up to the nth jack, where n is a natural number different from zero.
The lower-row jack 1017 comprises a first jack, a second jack and a third jack, and so on until the nth jack, wherein n is a natural number which is not zero.
And, the upper row of jacks 1015 and the lower row of jacks 1017 are equal in number, are n, and have a one-to-one correspondence in position, where n may be set according to actual conditions.
The first common end 1011 is connected to the upper row of holes 1015 and the second common end 1013 is connected to the lower row of holes 1017. those skilled in the art will appreciate that the two can be connected by wires, and other conductive materials can be used, such as other conductive metals, e.g., solder. It can also be appreciated from fig. 2 that the first common end 1011 and the second common end 1013 are of the same type.
A toggle switch 1019 is arranged between the upper row of jacks 1015 and the lower row of jacks 1017, when the toggle switch 1019 is closed, the upper row of jacks 1015 is connected with the lower row of jacks 1017, and when the toggle switch 1019 is disconnected, the upper row of jacks 1015 is disconnected with the lower row of jacks 1017.
The patch cable 103 includes a mating end 1031 and a common end 1033 for connecting the cable contact deployment device to the network of cables under test. Wherein the adapter terminal 1031 is connected to a test port of the network under test, and the common terminal 1033 is connected to the first common terminal 1011 or the second common terminal 1013 of the cable contact deployment apparatus 101. A plurality of patch cables are required to be configured according to the type of a test port of a tested network.
The shorting plug 105, including the test port 1051 and the connection port 1053, is used to short the cable contact deployment device. All contacts in the short circuit plug are short-circuited and led out to a test port 1051, and the model of the short circuit plug connection port 1053 is matched with the model of the first public end 1011 or the second public end 1013 of the cable contact spreading device 101.
In a preferred example, the test port 1051 of the shorting plug 105 is a banana plug. Those skilled in the art will appreciate that the banana plug is used only for convenience of testing, and may be a wire connector or other conductive connector.
The testing device 20 includes a first testing terminal 201 and a second testing terminal 203 for testing whether the tested contact is normal. In one particular embodiment, the test device 20 may be a multimeter, an insulated megohmmeter, an ohmmeter, or the like.
Embodiment 2-a cable network testing method suitable for spacecraft
As shown in fig. 3, a method for testing a spacecraft cable network includes:
judging the type of the tested cable network;
selecting a test requirement according to the type of the tested cable network;
and selecting a proper test method according to the test requirement, and judging whether the tested network is normal by using the test device according to the test method.
Wherein, the cable network type under test includes: multiple cables, a single connector, multiple connectors.
As shown in fig. 4, when the tested cable network is a plurality of cables, it is required to test whether the cables are conducted.
The cable is divided into a first cable and a second cable which are analogized in sequence until an Nth cable, wherein N is a natural number greater than zero and is determined according to actual conditions. And selecting a matched transfer cable according to the test port of the first cable, wherein the first transfer cable is adaptively connected with the test port of the first cable, the common end of the first transfer cable is connected with the first common end or the second common end of the first cable contact spreading device, and so on until the matched transfer cable is selected according to the test port of the Nth cable, the Nth transfer cable is adaptively connected with the test port of the Nth cable, and the common end of the Nth transfer cable is connected with the first common end or the second common end of the Nth cable contact spreading device.
Taking the example of testing whether the first cable and the second cable are conducted or not, it should be understood by those skilled in the art that the method for testing whether any two cables are conducted or not is the same, and will not be described herein too much.
If the common end of the first adapter cable is connected with the first common end of the first cable contact spreading device, the first testing end of the testing device is in butt joint with the upper row of jacks of the first cable contact spreading device, if the common end of the first adapter cable is connected with the second common end of the first cable contact spreading device, the first testing end of the testing device is in butt joint with the lower row of jacks of the first cable contact spreading device, and the second testing end of the testing device is in the same way.
According to the rules and the actual conditions, the first testing end of the testing device is connected with the upper row of jacks or the lower row of jacks corresponding to the first cable contact unfolding device of the first cable, the second testing end of the testing device is connected with the upper row of jacks or the lower row of jacks corresponding to the second cable contact unfolding device of the second cable, and then whether the plurality of cables are conducted or not is judged according to the testing result displayed by the testing equipment.
When the cable network under test is a single connector, it is tested whether each of the contacts in the single connector is insulated, as shown in FIG. 5.
Selecting a matched adapter cable according to a test port of a single connector, connecting an adaptive end of the adapter cable with the test port of the single connector, connecting a common end with a first common end of the cable contact spreading device, connecting a second common end of the cable contact spreading device with a matched short-circuit plug, disconnecting toggle switches except for the first upper row of jacks and the first lower row of jacks, closing the rest toggle switches, connecting a first test end of the test equipment with the first upper row of jacks, connecting a second test end with the test end of the short-circuit plug, judging whether the first plug contacts in the single connector are insulated according to a test result displayed by the test equipment, disconnecting the toggle switches between the second upper row of jacks and the second lower row of jacks, connecting the first test end of the test equipment with the second upper row of jacks, connecting the second test end with the test end of the short-circuit plug, and sequentially carrying out insulation test, and completing the test until the last second upper row jack test is completed.
It will be appreciated by those skilled in the art that it is also possible for the common end of the patch cable to terminate the second common end of the cable contact deployment device and the first common end of the cable contact deployment device to be connected to a mating shorting plug, and that the method steps are similar.
As shown in fig. 6, when the cable network to be tested is a plurality of connectors, it is necessary to test whether the plurality of connectors are insulated.
The connector is divided into a first connector and a second connector, and the like, until the mth connector, m is a natural number larger than zero.
Taking the test of whether the first connector and the second connector are insulated, it should be understood by those skilled in the art that the method for determining whether any two connectors are insulated is the same, and will not be described herein.
The first adapter cable and the second adapter cable which are matched are selected according to the test ports of the first connector and the second connector, the adaptive ends of the first adapter cable are respectively connected with the test port of the first connector, the public end of the first adapter cable is connected with the first public end of the first cable contact unfolding device, and the second public end of the first cable contact unfolding device is connected with the matched first short-circuit plug. Similarly, the adaptive end of the second adapter cable is connected to the test port of the second connector, the common end of the second adapter cable is connected to the first common end of the second cable contact deployment device, and the second common end of the second cable contact deployment device is connected to the second short-circuit plug.
And then, closing toggle switches of the first cable contact unfolding device and the second cable contact unfolding device, connecting a first test end of the test equipment with a test end of a short-circuit plug of the first cable contact unfolding device, connecting a second test end with a test end of a short-circuit plug of the second cable contact unfolding device, and judging whether the first connector and the second connector are insulated according to a test result displayed by the test equipment.
It will be appreciated by those skilled in the art that the common end of the first patch cable may terminate at the second common end of the first cable contact deployment device, and that the first common end of the first cable contact deployment device may be connected to a mating first shorting plug, and that other cable contact deployment devices may be similarly configured, with similar method steps.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. A spacecraft cable network test apparatus adapted to be used in a spacecraft, comprising:
the cable contact spreading device is used for amplifying the tested contact of the connector in the tested cable network;
the adapter cable is used for connecting the cable contact unfolding device and a tested cable network;
and the short-circuit plug is used for short-circuiting the cable contact unfolding device.
2. The apparatus of claim 1, wherein the cable contact deployment device comprises: a first public end, a second public end, an upper row of jacks, a lower row of jacks and a toggle switch, wherein,
the first public end is connected with the upper row of jacks through leads, and the second public end is connected with the lower row of jacks through leads;
a toggle switch is arranged between the upper row of jacks and the lower row of jacks, when the toggle switch is closed, the upper row of jacks is communicated with the lower row of jacks, and when the toggle switch is disconnected, the upper row of jacks is disconnected with the lower row of jacks;
the upper row of jacks and the lower row of jacks are equal in number and are in one-to-one correspondence in position.
3. The apparatus of claim 1, wherein the patch cable comprises:
the adapter end is connected with the tested cable network, and the common end is connected with the cable contact unfolding device.
4. The apparatus of claim 1, wherein the shorting plug includes a test port and a connection port, the connection port being connected to the cable contact deployment device, the test port being for connection to a test apparatus.
5. A system for testing a cable network suitable for use in a spacecraft, comprising:
the apparatus according to any one of claims 1-4;
the testing device comprises a first testing end and a second testing end and is used for testing whether the tested contact is normal or not.
6. A method for spacecraft cable network testing using the system of claim 5, comprising:
judging the type of the tested cable network;
selecting a test requirement according to the type of the tested cable network;
and selecting a proper test method according to the test requirement, and judging whether the tested network is normal by using the test device according to the test method.
7. The method of claim 6, wherein the tested cable network types comprise: multiple cables, a single connector, multiple connectors.
8. The method of claim 7, wherein selecting test requirements according to the type of cable network under test comprises:
when the tested cable network is a plurality of cables, whether the cables are conducted or not needs to be tested;
when the tested cable network is a single connector, whether each connector in the single connector is insulated or not needs to be tested;
when the cable network to be tested is a plurality of connectors, it is necessary to test whether the plurality of connectors are insulated.
9. The method of claim 7, wherein selecting the appropriate test method based on the test requirements comprises:
when the tested cable network is a plurality of cables, respectively selecting matched switching cables according to the test ports of the plurality of cables, respectively connecting the adaptive ends of the switching cables with the test ports of the plurality of cables, respectively connecting the common ends with the first common ends or the second common ends of the plurality of cable contact unfolding devices, respectively connecting the test ends of the test devices with the upper row of jacks or the lower row of jacks corresponding to the first common ends or the second common ends of the plurality of cable contact unfolding devices, and judging whether the plurality of cables are conducted according to the test result displayed by the test equipment;
when the tested cable network is a single connector, selecting a matched adapter cable according to the test port of the single connector, connecting the adaptive end of the adapter cable with the test port of the single connector, connecting the common end with the first common end of the cable contact spreading device, connecting the second common end of the cable contact spreading device with a matched short-circuit plug, disconnecting the toggle switches except for the first upper row of jacks and the first lower row of jacks, closing the other toggle switches, connecting the first test end of the test equipment with the first upper row of jacks, connecting the second test end with the test end of the short-circuit plug, judging whether the first plug-in point in the single connector is insulated according to the test result displayed by the test equipment, disconnecting the toggle switches between the second upper row of jacks and the second lower row of jacks, connecting the first test end of the test equipment with the second upper row of jacks and connecting the second test end of the short-circuit plug, and sequentially carrying out insulation test until the last row jack test is finished, namely the test is finished.
10. The method of claim 7, wherein selecting an appropriate test method based on test requirements further comprises:
when the tested cable network is a plurality of connectors, matched adapter cables are selected according to the test ports of the connectors, the adaptive ends of the adapter cables are respectively connected with the test ports of the connectors, the public ends are respectively connected with the first public ends of the cable contact unfolding devices, the second public ends of the cable contact unfolding devices are respectively connected with matched short-circuit plugs, toggle switches are closed, the first test end of the test equipment is connected with the test end of the short-circuit plug of the tested connector, the second test end of the test equipment is connected with the test end of the short-circuit plug of the other tested connector, whether the tested connector is insulated from the other tested connector is judged according to the test result displayed by the test equipment, and then the test equipment is used for sequentially carrying out insulation test on the rest tested connectors until the test among all the connectors is finished.
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