CN105116293A - Conduction and insulation automatic test method of aerospace low frequency cable network - Google Patents
Conduction and insulation automatic test method of aerospace low frequency cable network Download PDFInfo
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- CN105116293A CN105116293A CN201510582965.0A CN201510582965A CN105116293A CN 105116293 A CN105116293 A CN 105116293A CN 201510582965 A CN201510582965 A CN 201510582965A CN 105116293 A CN105116293 A CN 105116293A
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Abstract
The present invention discloses a conduction and insulation automatic test method of an aerospace low frequency cable network, comprising the specific steps: the step 1, introducing a contact connection relation of the low frequency cable network consisting of cable numbers and electric coupler numbers to an upper computer; step 2, sending conduction and insulation test parameter information, the electric coupler numbers and the cable numbers information to a relay control module through a single chip microcomputer, controlling switch of the relay, selecting a corresponding pathway of the conduction and insulation test circuit to test, and obtaining conduction and insulation values; the step 3, transmitting the conduction and insulation values obtained in the test in the step 2 to a data acquisition module through the single chip microcomputer, and transmitting resistance values of the conduction and the insulation to the upper computer; and the step 4, checking the resistance values of the conduction and the insulation obtained in the step 3 and the conduction and insulation test parameters, and verifying the correctness of the conduction and insulation test values. According to the invention, the conversion from the qualitative test to the quantitative test is realized, and automatic recording and comparison of data are achieved, thereby improving the testing efficiency and the accuracy of the test.
Description
Technical field
The present invention relates to the conducting of a kind of space flight low-frequency cable net and insulation automated testing method, be applied in the conducting of telstar low-frequency cable net and insulation automatic test.
Background technology
Low-frequency cable net, after whole star laying installation colligation, needs to test the conducting of low-frequency cable net and insulation characterisitic.The correctness of checking cable system contact, avoids occurring short circuit or open circuit, causes on-board equipment to burn or security incident.
When current telstar low-frequency cable net carries out continuity test on star, two lines are inserted on the corresponding point of two electric connectors, centre seals in hummer, point conducting on electric connector is described when hummer rings, adopt and can only provide result qualitatively in this way, actual resistance during cable conducting cannot be provided.When Insulation test, with insulation meter, an electric connector every bit on star and other are carried out manual test a little successively, adopt this kind of mode to need to take a large amount of time and manpower, simultaneously long dull repeated work, the as easy as rolling off a log situation occurring leak source.
Summary of the invention
The technical problem to be solved in the present invention is: for overcoming the deficiencies in the prior art, provide the conducting of a kind of space flight low-frequency cable net and insulation automated testing method, automatically to record and comparison the conducting of low-frequency cable net and insulation numerical value, improve testing efficiency and test accuracy.
The technology of the present invention solution: a kind of space flight low-frequency cable net conducting insulation automatic test approach, comprise host computer and slave computer, it is characterized in that, host computer is connected with slave computer by network interface, the supply module that slave computer comprises single-chip microcomputer, constant current source module, constant pressure source module, logic control circuit, data acquisition module, relay control module and powers for slave computer, wherein constant current source module, constant pressure source module, logic control circuit and relay control module form conducting insulation test circuit, and concrete steps are:
Step one: the contact annexation importing the low-frequency cable net comprising cable number and electric connector numbering in host computer;
Step 2: conducting insulated instruction, conducting Insulation test parameter, cable number and electric connector number information of host computer sends to single-chip microcomputer, single-chip microcomputer is resolved conducting insulation instruction, and control constant current source blocks current gear and constant pressure source module voltage gear information are exported to logic control circuit, send instruction to logic control circuit by single-chip microcomputer simultaneously, control constant current source module or the switching of constant pressure source module; Conducting Insulation test parameter information, electric connector numbering, cable number information are sent to relay control module, pilot relay switching over by single-chip microcomputer, select the respective channels of conducting insulation test circuit to test, obtain conducting insulation values;
Step 3: single-chip microcomputer passes to data acquisition module by testing the conducting insulation values obtained in step 2, data acquisition module converts the process of conducting insulation values to single-chip microcomputer discernible data message and passes to single-chip microcomputer, single-chip microcomputer obtains conducting insulating resistance value by computing, and the resistance value that conducting is insulated is passed to host computer;
Step 4: the resistance value insulate the conducting drawn in step 3 and conducting Insulation test parameter are checked, the correctness of checking conducting Insulation test value, if resistance value is not in conducting Insulation test parameter area, then get back in step one and re-start test, if resistance value is not still in conducting Insulation test parameter area after tested, illustrate that low-frequency cable net has problems.
After the resistance value insulated to conducting in step 4 and conducting Insulation test parameter are checked, if resistance value drops in conducting Insulation test parameter area, then carry out the comparison of conducting Insulation test consistance, by doublely carry out step one ~ twice conducting insulating resistance value that step 3 obtains compare, verify the consistance of twice conducting Insulation test value, if twice resistance value difference exceeds the difference range provided in conducting Insulation test parameter, illustrate that low-frequency cable net has problems.
In step one, the determination mode of contact annexation is: by carrying out Signal transmissions definition to each contact of electric connectors all on unit, and electric connector is numbered, mate each electric connector Signal transmissions definition on different unit, by the pad interconnection of the same signal content of transmission, and the cable of interconnection is carried out cable number, thus determine the contact annexation of low-frequency cable net.
Described conducting insulation test circuit comprises: the transit cable of four relay J V1 ~ JV4, four relay J S1 ~ JS4,100 relay J A1 ~ JA100,100 relay J B1 ~ JB100,100 relay J C1 ~ JC100,100 relay J D1 ~ JD100,100 heart yearns and tested cable.
During continuity test, the state of transfer relay JV1 ~ JV4, and select the anode or the negative terminal that connect constant current source module, the state of transfer relay JA1 ~ JA100 and JD1 ~ JD100, connects formation current return with tested cable; The state of transfer relay JS1 ~ JS4, and select anode or the negative terminal of connection data acquisition module, the state of transfer relay JB1 ~ JB100 and JC1 ~ JC100, data-acquisition loop is connected and composed together with tested cable, utilize Ohm law, obtain the conducting resistance of tested cable.
During Insulation test, the state of transfer relay JV1 ~ JV4, and connect the anode of constant pressure source module, the state of transfer relay JS1 ~ JS4, and connect the negative terminal of constant pressure source module, one of them relay of transfer relay JA1 ~ JA100 is closure state, and be connected to the anode of constant pressure source module, be connected to a wherein heart yearn of tested cable simultaneously, switch the state of JB1 ~ JB100, except the relay of the relay J B1 ~ JB100 corresponding with one of them closure state relay of relay J A1 ~ JA100 disconnects, all the other relays of relay J B1 ~ JB100 are closure state, and be connected to the negative terminal of constant pressure source module, be connected to other heart yearns of tested cable simultaneously, test the electric current between an above-mentioned heart yearn and other heart yearns, and the electric current surveyed one by one between tested cable remaining every bar heart yearn and all the other heart yearns, obtain the insulation situation of tested cable.
All relays adopt solid-state relay, switch to realize frequent break-make.
The present invention's advantage is compared with prior art:
(1) the present invention utilizes the on off state of computer technology pilot relay, according to different test requests, tested contact is connected into conducting insulation test circuit, according to the test instruction of conducting or insulation, the switching of constant current source module or constant current source module is controlled by logic control circuit, for tested cable provides data-signal, after data acquisition module process, the corresponding conducting of automatic acquisition or insulating resistance value, compare with insulation manual test with conducting in the past, achieve by the transformation of qualitative test to quantitative test, achieve automatic record and the comparison of data, improve the accuracy of testing efficiency and test.
(2) all relays of the present invention adopt solid-state relay, can realize frequent break-make and switch, not have break-make number of times to limit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is continuity test schematic diagram of the present invention;
Fig. 3 is Insulation test schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
A kind of space flight low-frequency cable net conducting insulation automatic test approach, as shown in Figure 1, comprise host computer and slave computer, host computer is connected with slave computer by network interface, the supply module that slave computer comprises single-chip microcomputer, constant current source module, constant pressure source module, logic control circuit, data acquisition module, relay control module and powers for slave computer, wherein constant current source module, constant pressure source module, logic control circuit and relay control module form conducting insulation test circuit, and concrete steps are:
Step one: by carrying out Signal transmissions definition to each contact of electric connectors all on unit, and electric connector is numbered, mate each electric connector Signal transmissions definition on different unit, by the pad interconnection of the same signal content of transmission, and the cable of interconnection is carried out cable number, thus determine the contact annexation of low-frequency cable net, and contact annexation is imported in host computer.
Step 2: conducting insulated instruction, conducting Insulation test parameter, cable number and electric connector number information of host computer sends to single-chip microcomputer, single-chip microcomputer is resolved conducting insulation instruction, and control constant current source blocks current gear and constant pressure source module voltage gear information are exported to logic control circuit, send instruction to logic control circuit by single-chip microcomputer simultaneously, control constant current source module or the switching of constant pressure source module; Conducting Insulation test parameter information, electric connector numbering, cable number information are sent to relay control module, pilot relay switching over by single-chip microcomputer, select the respective channels of conducting insulation test circuit to test, obtain conducting insulation values;
Step 3: single-chip microcomputer passes to data acquisition module by testing the conducting insulation values obtained in step 2, data acquisition module converts the process of conducting insulation values to single-chip microcomputer discernible data message and passes to single-chip microcomputer, single-chip microcomputer obtains conducting insulating resistance value by computing, and the resistance value that conducting is insulated is passed to host computer;
Step 4: the resistance value insulate the conducting drawn in step 3 and conducting Insulation test parameter are checked, the correctness of checking conducting Insulation test value, if resistance value is not in conducting Insulation test parameter area, then get back in step one and re-start test, if resistance value is not still in conducting Insulation test parameter area after tested, illustrate that low-frequency cable net has problems.
After the resistance value insulated to conducting in step 4 and conducting Insulation test parameter are checked, if resistance value drops in conducting Insulation test parameter area, then carry out the comparison of conducting Insulation test consistance, by doublely carry out step one ~ twice conducting insulating resistance value that step 3 obtains compare, verify the consistance of twice conducting Insulation test value, if twice resistance value difference exceeds the difference range provided in conducting Insulation test parameter, illustrate that low-frequency cable net has problems.
Described conducting insulation test circuit comprises: the transit cable of four relay J V1 ~ JV4, four relay J S1 ~ JS4,100 relay J A1 ~ JA100,100 relay J B1 ~ JB100,100 relay J C1 ~ JC100,100 relay J D1 ~ JD100,100 heart yearns and tested cable.
During continuity test, the state of transfer relay JV1 ~ JV4, and select the anode or the negative terminal that connect constant current source module, the state of transfer relay JA1 ~ JA100 and JD1 ~ JD100, connects formation current return with tested cable; The state of transfer relay JS1 ~ JS4, and select anode or the negative terminal of connection data acquisition module, the state of transfer relay JB1 ~ JB100 and JC1 ~ JC100, data-acquisition loop is connected and composed together with tested cable, utilize Ohm law, obtain the conducting resistance of tested cable.
Particularly, for the cable conducting resistance between test branch A and branch C two electric connectors the 6th contact, as shown in Figure 2, the anode VIH of constant current source module is connected to one end of relay J V1, the other end of JV1 is connected to one end of relay J A6, the other end of relay J A6 is connected respectively to one end of relay J B6 and transit cable A, and the other end of relay J B6 is connected to one end of relay J S1, and the other end of relay J S1 is connected to the anode SIH of data acquisition module.The other end of transit cable A connects one end of tested cable, and the other end of tested cable connects one end of transit cable C, and the other end of transit cable C is connected respectively to one end of relay J C6 and relay J D6.The other end of relay J C6 is connected to one end of relay J S2, and the other end of relay J S2 is connected to the negative terminal SIL of data acquisition module.The other end of relay J D6 is connected to one end of relay J V2, and the other end of relay J V2 is connected to the negative terminal VIL of constant current source module.
During conducting resistance test, pilot relay JA6, JV1, JD6 and JV2 all close, and form a current path (in Fig. 2 shown in heavy line), the steady current that constant current source module exports flows through tested cable.Pilot relay JS1, JB6, JC6 and JS2 all close, form a signals collecting loop (in Fig. 2 shown in dotted line), be the voltage cable at the two ends of tested cable, transit cable A and transit cable C, utilize Ohm law, obtain tested cable conducting resistance.
During Insulation test, the state of transfer relay JV1 ~ JV4, and connect the anode of constant pressure source module, the state of transfer relay JS1 ~ JS4, and connect the negative terminal of constant pressure source module, one of them relay of transfer relay JA1 ~ JA100 is closure state, and be connected to the anode of constant pressure source module, be connected to a wherein heart yearn of tested cable simultaneously, switch the state of JB1 ~ JB100, except the relay of the relay J B1 ~ JB100 corresponding with one of them closure state relay of relay J A1 ~ JA100 disconnects, all the other relays of relay J B1 ~ JB100 are closure state, and be connected to the negative terminal of constant pressure source module, be connected to other heart yearns of tested cable simultaneously, test the electric current between an above-mentioned heart yearn and other heart yearns, and the electric current surveyed one by one between tested cable remaining every bar heart yearn and all the other heart yearns, obtain the insulation situation of tested cable.
Particularly, for the insulation resistance of test branch A electric connector the 6th contact, as shown in Figure 3, the anode VIH of constant pressure source module is connected to one end of relay J V1, the other end of relay J V1 is connected to one end of relay J A6, the other end of relay J A6 is connected respectively on relay J B6 and transit cable A, and the other end of transit cable A is connected on tested cable branch A electric connector.The negative terminal SVL of constant pressure source module is connected to one end of relay J S1, the other end of relay J S1 is connected respectively to one end of relay J B1 ~ JB5 and relay J B7 ~ JB100, and the other end of relay J B1 ~ JB5 and JB7 ~ JB100 is connected respectively on transit cable A.
During megger test, pilot relay JA6 and JV1 closes, and the 6th contact of tested cable branch A electric connector is connected to the anode VIH (in Fig. 3 shown in heavy line) of constant pressure source module.Pilot relay JB1 ~ JB5, JB7 ~ JB100 and JS1 close, and other heart yearns of tested cable branch A electric connector are connected to the negative terminal SVL (in Fig. 3 shown in dotted line) of constant pressure source module.Gather the electric current on this path, calculate insulation resistance, and survey the electric current between tested cable branch A remaining every bar heart yearn and all the other heart yearns one by one, calculate corresponding each insulation resistance, finally judge the insulation situation of tested cable.
In above-mentioned, all relays adopt solid-state relay, switch to realize frequent break-make.
Non-elaborated part of the present invention belongs to techniques well known.
Claims (7)
1. a space flight low-frequency cable net conducting insulation automatic test approach, comprise host computer and slave computer, it is characterized in that, host computer is connected with slave computer by network interface, the supply module that slave computer comprises single-chip microcomputer, constant current source module, constant pressure source module, logic control circuit, data acquisition module, relay control module and powers for slave computer, wherein constant current source module, constant pressure source module, logic control circuit and relay control module form conducting insulation test circuit, and concrete steps are:
Step one: the contact annexation importing the low-frequency cable net comprising cable number and electric connector numbering in host computer;
Step 2: conducting insulated instruction, conducting Insulation test parameter, cable number and electric connector number information of host computer sends to single-chip microcomputer, single-chip microcomputer is resolved conducting insulation instruction, and control constant current source blocks current gear and constant pressure source module voltage gear information are exported to logic control circuit, send instruction to logic control circuit by single-chip microcomputer simultaneously, control constant current source module or the switching of constant pressure source module; Conducting Insulation test parameter information, electric connector numbering, cable number information are sent to relay control module, pilot relay switching over by single-chip microcomputer, select the respective channels of conducting insulation test circuit to test, obtain conducting insulation values;
Step 3: single-chip microcomputer passes to data acquisition module by testing the conducting insulation values obtained in step 2, data acquisition module converts the process of conducting insulation values to single-chip microcomputer discernible data message and passes to single-chip microcomputer, single-chip microcomputer obtains conducting insulating resistance value by computing, and the resistance value that conducting is insulated is passed to host computer;
Step 4: the resistance value insulate the conducting drawn in step 3 and conducting Insulation test parameter are checked, the correctness of checking conducting Insulation test value, if resistance value is not in conducting Insulation test parameter area, then get back in step one and re-start test, if resistance value is not still in conducting Insulation test parameter area after tested, illustrate that low-frequency cable net has problems.
2. a kind of space flight low-frequency cable net conducting insulation automatic test approach according to claim 1, it is characterized in that, after the resistance value insulated to conducting in step 4 and conducting Insulation test parameter are checked, if resistance value drops in conducting Insulation test parameter area, then carry out the comparison of conducting Insulation test consistance, by doublely carry out step one ~ twice conducting insulating resistance value that step 3 obtains compare, verify the consistance of twice conducting Insulation test value, if twice resistance value difference exceeds the difference range provided in conducting Insulation test parameter, illustrate that low-frequency cable net has problems.
3. a kind of space flight low-frequency cable net conducting insulation automatic test approach according to claim 1 and 2, it is characterized in that, in step one, the determination mode of contact annexation is: by carrying out Signal transmissions definition to each contact of electric connectors all on unit, and electric connector is numbered, mate each electric connector Signal transmissions definition on different unit, by the pad interconnection of the same signal content of transmission, and the cable of interconnection is carried out cable number, thus determine the contact annexation of low-frequency cable net.
4. a kind of space flight low-frequency cable net conducting insulation automatic test approach according to claim 1, it is characterized in that, described conducting insulation test circuit comprises: the transit cable of four relay J V1 ~ JV4, four relay J S1 ~ JS4,100 relay J A1 ~ JA100,100 relay J B1 ~ JB100,100 relay J C1 ~ JC100,100 relay J D1 ~ JD100,100 heart yearns and tested cable.
5. a kind of space flight low-frequency cable net conducting insulation automatic test approach according to claim 4, it is characterized in that, during continuity test, the state of transfer relay JV1 ~ JV4, and select the anode or the negative terminal that connect constant current source module, the state of transfer relay JA1 ~ JA100 and JD1 ~ JD100, connects formation current return with tested cable; The state of transfer relay JS1 ~ JS4, and select anode or the negative terminal of connection data acquisition module, the state of transfer relay JB1 ~ JB100 and JC1 ~ JC100, data-acquisition loop is connected and composed together with tested cable, utilize Ohm law, obtain the conducting resistance of tested cable.
6. a kind of space flight low-frequency cable net conducting insulation automatic test approach according to claim 4, it is characterized in that, during Insulation test, the state of transfer relay JV1 ~ JV4, and connect the anode of constant pressure source module, the state of transfer relay JS1 ~ JS4, and connect the negative terminal of constant pressure source module, one of them relay of transfer relay JA1 ~ JA100 is closure state, and be connected to the anode of constant pressure source module, be connected to a wherein heart yearn of tested cable simultaneously, switch the state of JB1 ~ JB100, except the relay of the relay J B1 ~ JB100 corresponding with one of them closure state relay of relay J A1 ~ JA100 disconnects, all the other relays of relay J B1 ~ JB100 are closure state, and be connected to the negative terminal of constant pressure source module, be connected to other heart yearns of tested cable simultaneously, test the electric current between an above-mentioned heart yearn and other heart yearns, and the electric current surveyed one by one between tested cable remaining every bar heart yearn and all the other heart yearns, obtain the insulation situation of tested cable.
7. a kind of space flight low-frequency cable net conducting insulation automatic test approach according to claim 4, it is characterized in that, all relays adopt solid-state relay, switch to realize frequent break-make.
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