CN211263672U - Universal automatic cable testing system based on CPCI bus - Google Patents
Universal automatic cable testing system based on CPCI bus Download PDFInfo
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- CN211263672U CN211263672U CN201920971541.7U CN201920971541U CN211263672U CN 211263672 U CN211263672 U CN 211263672U CN 201920971541 U CN201920971541 U CN 201920971541U CN 211263672 U CN211263672 U CN 211263672U
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Abstract
A cable general automatic test system based on CPCI bus is characterized in that: the system comprises a program-controlled voltage-insulating measurement module, a display keyboard combination, a measurement and control combination and a signal switching combination, wherein the program-controlled voltage-insulating measurement module is respectively connected with the measurement and control combination and the signal switching combination, and the measurement and control combination is also connected with the display keyboard combination and the signal switching combination. The utility model discloses a "modularization + integrate" design theory design is portable cabinet formula structure, has advantages such as the reliability is high, scalability is good, can realize the automatic test function of the electric property of the arbitrary low frequency cable of different models, different specifications, effectively improves the measurement accuracy and the efficiency of software testing of cable test, and more traditional test method efficiency improves more than 200%.
Description
Technical Field
The utility model relates to a general automatic test system of cable based on CPCI bus for satisfy the cable electrical performance test demand of different models, different specifications.
Background
Before the cable leaves a factory, in the cable assembly process and after the cable is assembled, the cable needs to be subjected to conduction test, insulation test and voltage resistance test so as to verify whether the electrical performance of the cable is qualified. The traditional test method is as follows: the cable connection that awaits measuring is to the test box, and the manual toggle switch of rethread carries out electrical property test, and this method measurement accuracy is poor, and efficiency of software testing is low, can't satisfy the requirement of growing batch production test task, for promoting efficiency of software testing and automatic test level, the utility model provides a general automatic test system of cable based on CPCI bus.
At present, widely applied control bus frameworks in the field of domestic and foreign tests comprise a PCI bus framework, a CPCI bus framework, a PXI bus framework and the like. The PCI bus is mainly used for a computer communication control system, the number of the slots of the PCI bus is at most 4, the PCI bus has general structural stability, and the PCI bus is not suitable for mobile and portable application requirements. The CPCI bus has the electrical and software standards of the PCI bus, and the structural aspect applies the European industry assembly standard, thereby enhancing the structural stability. PXI combines the electrical bus characteristics of PCI/PCIe with the modularization of CPCI and the characteristics of Eurocard mechanical packaging, adds a high-performance synchronization and timing bus and corresponding software specifications, and has high flexibility and high performance, but the price of a PXI bus architecture processor and a functional module is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a general automatic test system of cable based on CPCI bus effectively improves cable efficiency of software testing.
A cable general automatic test system based on CPCI bus is characterized in that: the system comprises a program-controlled voltage-insulating measurement module, a display keyboard combination, a measurement and control combination and a signal switching combination, wherein the program-controlled voltage-insulating measurement module is respectively connected with the measurement and control combination and the signal switching combination, and the measurement and control combination is also connected with the display keyboard combination and the signal switching combination.
The measurement and control combination comprises an EMI filtering module (8), a relay driving power supply module (10) and a 3U CPCI cage combination (6), wherein the 3U CPCI cage combination (6) comprises a CPCI bus back plate (2), an embedded controller (1), a plurality of digital IO card modules PXI-6509(3), a digital multimeter module PXI-4065(4) and a CPCI power supply module (5); the CPCI bus backboard (2) is respectively connected with the embedded controller (1), the plurality of digital IO card modules PXI-6509(3), the digital multimeter modules PXI-4065(4) and the power supply module; the EMI filtering module (8) is respectively connected with the relay driving power module (10) and the CPCI power module (5); the CPCI power supply module (5) is connected with the CPCI bus backboard (2).
The signal switching combination comprises a 6U relay cage combination (13) and a cable switching combination (15), wherein the 6U relay cage combination (13) comprises a communication back plate (9), a plurality of high-voltage-resistant relay plates (11) and a gauge pen switching plate (12). The communication back board (9) is respectively connected with a plurality of high-voltage-resistant relay boards (11) and a meter pen switching board (12), and the plurality of high-voltage-resistant relay boards (11) are connected with a cable switching combination (15).
The program-controlled voltage-insulating measurement module (14) is connected with the embedded controller (1) of the 3U CPCI cage combination (6) of the measurement and control combination, and the program-controlled voltage-insulating measurement module (14) is connected with the communication back plate (9) of the signal switching combination; the keyboard display combination (7) is connected with the embedded controller (1) of the 3U CPCI cage combination (6) of the measurement and control combination; the digital multimeter module PXI-4065(4) of the 3U CPCI cage combination (6) of the measurement and control combination is connected with the communication back panel (9) of the 6U relay cage combination (13) of the signal switching combination; the digital IO card module PXI-6509(3) of the 3U CPCI cage combination (6) of the measurement and control combination is connected with the communication back plate (9) of the 6U relay cage combination (13) of the signal transfer combination; the relay driving power supply module (10) of the measurement and control combination is connected with the communication back plate (9) of the 6U relay cage combination (13) of the signal transfer combination.
The device also comprises a movable cabinet, wherein four small wheels are arranged at the bottom of the movable cabinet, and a program-controlled insulation voltage-resistant measurement module, a display keyboard combination, a measurement and control combination and a signal switching combination are all arranged in the movable cabinet.
The conduction test adopts a four-wire system to test the resistance, and the realization method comprises the following steps: two leads are led out from each point to be tested of the cable to be tested, the leads are connected to the ' A + ' and ' V + ' of a digital multimeter module PXI-4065(4) through a cable switching combination (6), a high-voltage resistant relay board (6) and a meter pen switching board (12), or are connected to the ' A- ' and ' V- ', when conducting test is carried out, the embedded controller (1) controls gating of corresponding relays on the high-voltage resistant relay board (6) and the meter pen switching board (12), so that the point A to be tested and the point B to be tested at two ends of the cable to be tested are respectively connected to the ' A + ', the ' V + ', the ' A- ', the ' and the ' V- ', the digital multimeter module PXI-4065(4) works under a four-wire system test resistance mode, and the influence of cable test and return line resistance is eliminated due to four-wire measurement, the resistance measurement precision can be greatly improved.
Two testing methods are provided for insulation (or voltage resistance) testing, and testing personnel can flexibly select the method according to testing requirements. A test method is a single-point-to-multipoint insulation (or voltage withstanding) test method, namely, if insulation or voltage withstanding tests are carried out on N points, N-1 points to be tested are in short circuit (excluding the ith point to be tested), insulation (or voltage withstanding) tests are carried out on the points which are not in short circuit (the ith point to be tested), i is changed from 1 to N-1, and the insulation (or voltage withstanding) tests between any two points can be realized only through N-1 insulation (or voltage withstanding) tests. The other method is a multipoint-to-multipoint binary recombination test method, namely, all insulation and voltage resistance test points are continuously subjected to binary and recombination for testing until the number of test points after binary is 1, and if N points are subjected to insulation (or voltage resistance) test, the binary recombination test method theoretically only needs log2And the insulation (or voltage resistance) test between any two points can be realized by N times of tests.
The utility model discloses a "modularization + integrate" design theory design is portable cabinet formula structure, has advantages such as the reliability is high, scalability is good, can realize the automatic test function of the electric property of the arbitrary low frequency cable of different models, different specifications, effectively improves the measurement accuracy and the efficiency of software testing of cable test, and more traditional test method efficiency improves more than 200%.
Compared with the prior art, the utility model the advantage lie in: compared with the traditional test method, the test time is shortened by 50-90%, and the test efficiency is greatly improved.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic block diagram of the present invention;
FIG. 3 is a schematic diagram of a four-wire system resistance measurement for conduction test according to the present invention;
FIG. 4 is a schematic diagram of the driving operation of the high voltage relay of the present invention;
FIG. 5 is a flow chart of the single-point-to-multipoint testing method for medium insulation (or voltage withstand) testing of the present invention;
fig. 6 is a flow chart of the binary recombination testing method for the middle insulation (or voltage withstand) test according to the present invention.
Detailed Description
A cable general automatic test system based on CPCI bus is characterized in that: the system comprises a program-controlled voltage-insulating measurement module, a display keyboard combination, a measurement and control combination and a signal switching combination, wherein the program-controlled voltage-insulating measurement module is respectively connected with the measurement and control combination and the signal switching combination, and the measurement and control combination is also connected with the display keyboard combination and the signal switching combination.
The measurement and control combination comprises an EMI filtering module (8), a relay driving power supply module (10) and a 3U CPCI cage combination (6), wherein the 3U CPCI cage combination (6) comprises a CPCI bus back plate (2), an embedded controller (1), a plurality of digital IO card modules PXI-6509(3), a digital multimeter module PXI-4065(4) and a CPCI power supply module (5); the CPCI bus backboard (2) is respectively connected with the embedded controller (1), the plurality of digital IO card modules PXI-6509(3), the digital multimeter modules PXI-4065(4) and the power supply module; the EMI filtering module (8) is respectively connected with the relay driving power module (10) and the CPCI power module (5); the CPCI power supply module (5) is connected with the CPCI bus backboard (2).
The signal switching combination comprises a 6U relay cage combination (13) and a cable switching combination (15), wherein the 6U relay cage combination (13) comprises a communication back plate (9), a plurality of high-voltage-resistant relay plates (11) and a gauge pen switching plate (12). The communication back board (9) is respectively connected with a plurality of high-voltage-resistant relay boards (11) and a meter pen switching board (12), and the plurality of high-voltage-resistant relay boards (11) are connected with a cable switching combination (15).
The program-controlled voltage-insulating measurement module (14) is connected with the embedded controller (1) of the 3U CPCI cage combination (6) of the measurement and control combination, and the program-controlled voltage-insulating measurement module (14) is connected with the communication back plate (9) of the signal switching combination; the keyboard display combination (7) is connected with the embedded controller (1) of the 3U CPCI cage combination (6) of the measurement and control combination; the digital multimeter module PXI-4065(4) of the 3U CPCI cage combination (6) of the measurement and control combination is connected with the communication back panel (9) of the 6U relay cage combination (13) of the signal switching combination; the digital IO card module PXI-6509(3) of the 3U CPCI cage combination (6) of the measurement and control combination is connected with the communication back plate (9) of the 6U relay cage combination (13) of the signal transfer combination; the relay driving power supply module (10) of the measurement and control combination is connected with the communication back plate (9) of the 6U relay cage combination (13) of the signal transfer combination.
The device also comprises a movable cabinet, wherein four small wheels are arranged at the bottom of the movable cabinet, and a program-controlled insulation voltage-resistant measurement module, a display keyboard combination, a measurement and control combination and a signal switching combination are all arranged in the movable cabinet.
The conduction test adopts a four-wire system to test the resistance, and the realization method comprises the following steps: two leads are led out from each point to be tested of the cable to be tested, the leads are connected to the ' A + ' and ' V + ' of a digital multimeter module PXI-4065(4) through a cable switching combination (6), a high-voltage resistant relay board (6) and a meter pen switching board (12), or are connected to the ' A- ' and ' V- ', when conducting test is carried out, the embedded controller (1) controls gating of corresponding relays on the high-voltage resistant relay board (6) and the meter pen switching board (12), so that the point A to be tested and the point B to be tested at two ends of the cable to be tested are respectively connected to the ' A + ', the ' V + ', the ' A- ', the ' and the ' V- ', the digital multimeter module PXI-4065(4) works under a four-wire system test resistance mode, and the influence of cable test and return line resistance is eliminated due to four-wire measurement, the resistance measurement precision can be greatly improved.
Two testing methods are provided for insulation (or voltage resistance) testing, and testing personnel can flexibly select the method according to testing requirements. A test method is a single-point-to-multipoint insulation (or voltage withstanding) test method, namely, if insulation or voltage withstanding tests are carried out on N points, N-1 points to be tested are in short circuit (not including the ith point to be tested), insulation (or voltage withstanding) tests are carried out on the points not to be tested (the ith point to be tested), i is changed from 1 to N-1, and any two points can be tested only through N-1 insulation (or voltage withstanding) testsInsulation (or withstand voltage) test therebetween. The other method is a multipoint-to-multipoint binary recombination test method, namely, all insulation and voltage resistance test points are continuously subjected to binary and recombination for testing until the number of test points after binary is 1, and if N points are subjected to insulation (or voltage resistance) test, the binary recombination test method theoretically only needs log2And the insulation (or voltage resistance) test between any two points can be realized by N times of tests.
The first embodiment is as follows:
the CPCI bus-based general cable automatic test system has the advantages of modular design, good expandability, high test efficiency and high automation degree. The technical solution of the utility model is as follows:
the general automatic test system of cable based on CPCI bus adopts "modularization + integrates" design theory, and each functional module contains: the device comprises an insulation withstand voltage measuring module, a display keyboard combination, a measurement and control combination and a signal switching combination. Wherein, observe and control and include EMI filter module, relay drive power module and 3U's CPCI cage combination in the combination, signal switching combination contains 6U relay cage combination and cable switching combination. And finally, all the functional modules are integrated in the movable cabinet, and four small wheels are arranged at the bottom of the movable cabinet, so that the movable cabinet is convenient to move and can meet the requirements of different distributed test tasks in different plants and different areas.
The cable general automatic test system based on the CPCI bus mainly comprises: the testing equipment cabinet comprises a testing cabinet case, an embedded controller (1), a display keyboard combination (7), a CPCI bus back panel (2), a digital IO card module PXI-6509(3), a digital multimeter module PXI-4065(4), a program-controlled insulation voltage-resistance measurement module (14), a CPCI power module (5), an EMI filter (8), a relay driving power supply (10), a communication back panel (9), a high-voltage-resistant relay board (11), a meter pen switching board (12), a cable switching combination (15) and the like. The embedded controller (1), the CPCI bus backboard (2), the digital IO card module PXI-6509(3), the digital multimeter module PXI-4065(4) and the CPCI power module (5) are integrated in the 3U CPCI cage assembly (6), and the 3U CPCI cage assembly (6) provides a supporting and fixing effect for each module. The communication back plate (9), the high-voltage-resistant relay plate (11) and the meter pen switching plate (12) are integrated in the 6U relay cage combination (13), and the 6U relay cage combination (13) also provides a supporting and fixing effect for each module.
Wherein the embedded controller (1): for the control core of the cable universal automatic test system, test main control interface software and a measurement and control algorithm are realized through an embedded controller (1), the processor is inserted into a 3U cage (6) and connected with a CPCI bus backboard (2), communication with a digital I/O card module PXI-6509(3) and a digital multimeter module PXI-4065(4) is realized through a CPCI bus, communication with a program control insulation voltage resistance measurement module (14) is realized through an RS-232 serial bus, and communication with a display keyboard combination (7) is realized through a VGA video line.
Display keypad assembly (7): the test system is an interactive interface between a test operator and the embedded controller (1), and is connected with the embedded controller (1) through a VGA video line, so that the functions of command sending and control, real-time display and monitoring of test data, test data processing and the like are realized.
Digital IO card module PXI-6509 (3): the test device is provided with 96 paths of digital I/O (input/output), 5V TTL/CMOS (transistor-transistor logic/complementary metal oxide semiconductor) electrical level is output, a digital IO card module PXI-6509(3) is inserted into a 3U cage (6) and connected with a CPCI bus backboard (2), a control signal of an embedded controller (1) is received through the CPCI bus, then a digital IO signal is output to a high-voltage-resistant relay board (11) and a meter pen switching board (12), and the relay suction disconnection on the high-voltage-resistant relay board (11) and the meter pen switching board (12) is controlled and driven to be completed, so that the function of switching and connecting a test point and a test instrument is realized.
Digital multimeter module PXI-4065 (4): the device is used for high-precision four-wire resistor measurement, is inserted into a 3U cage (6) and is connected with a CPCI bus back plate (2), communicates with an embedded controller (2) through a CPCI bus, and a test end of the device is connected with a meter pen switching plate (12) through a communication cable and a communication back plate (9) to realize conduction test and test data acquisition and transmission functions.
Program-controlled dielectric withstand voltage measuring module (14): the test device is used for insulation test and voltage-withstand test, is connected with the embedded controller (1) through an RS-232 bus, and is connected with the meter pen switching board (12) through a communication cable and a communication back board (9) at a test end, so that the insulation test, the voltage-withstand test and the test data acquisition and transmission functions are realized.
Meter pen switching board (12): the testing device is inserted into a 6U cage (13) and connected with a communication backboard (9), is communicated with a high-voltage-resistant relay board (6) through the communication backboard (9), is connected with a digital multimeter module PXI-4065(4) and a program-controlled insulation voltage-resistant measurement module (14) through the communication backboard and a communication cable, and realizes the gating connection of a tested signal and a testing end of a testing instrument.
High voltage resistant relay board (6): the test signal is inserted into a 6U cage (13) and is connected with a communication back plate (9) to realize communication with a meter pen switching plate (12), so that the gating connection of the test signal and a test instrument is realized; all points to be tested of the cable to be tested are connected with the high-voltage-resistant relay board (6) through the cable switching combination (15) and the switching cable, so that the switching connection between the test points and the test meter pen is realized.
CPCI power supply module (5): the CPCI bus back board is inserted into a 3U cage (6) and connected with the CPCI bus back board (2) through a power supply line to provide working power supplies for the embedded controller (1), the digital IO card module PXI-6509(3) and the digital multimeter module PXI-4065 (4).
Relay drive power supply (10): the high-voltage relay is connected with the communication back plate (9) to provide working voltage for the relays on the high-voltage relay board (11) and the meter pen switching board (12).
EMI filtering (8): the 220Vac alternating current commercial power is filtered, high-frequency interference is reduced, and clean and stable alternating current power supply is provided for the CPCI power supply module (5) and the relay driving power supply (10).
Cable switching combination (15): and connecting the cable to be tested with the high-voltage-resistant relay board (6) to realize grouping, sorting and switching of the signals to be tested.
The testing main control interface software and the control algorithm of the cable general automatic testing system adopt visual programming software Labview to establish a graphical virtual instrument panel, and the functions of test file configuration, conducting insulation voltage resistance automatic testing, test data processing and the like are realized.
The conduction test of the universal automatic test system for the cable adopts a four-wire system to test the resistance, and the realization method comprises the following steps: two leads are led out from each point to be tested of the cable to be tested, the leads are connected to the ' A + ' and ' V + ' of a digital multimeter module PXI-4065(4) through a cable switching combination (6), a high-voltage resistant relay board (6) and a meter pen switching board (12), or are connected to the ' A- ' and ' V- ', when conducting test is carried out, the embedded controller (1) controls gating of corresponding relays on the high-voltage resistant relay board (6) and the meter pen switching board (12), so that the point A to be tested and the point B to be tested at two ends of the cable to be tested are respectively connected to the ' A + ', the ' V + ', the ' A- ', the ' and the ' V- ', the digital multimeter module PXI-4065(4) works under a four-wire system test resistance mode, and the influence of cable test and return line resistance is eliminated due to four-wire measurement, the resistance measurement precision can be greatly improved.
The insulation (or voltage withstanding) test of the cable universal automatic test system is provided with two test methods, so that a tester can flexibly select the test method according to the test requirement. A test method is a single-point-to-multipoint insulation (or voltage withstanding) test method, namely, if insulation (or voltage withstanding) test is carried out on N points, N-1 points to be tested are short-circuited (not including the ith point to be tested), insulation (or voltage withstanding) test is carried out on the points which are not short-circuited (the ith point to be tested), i is changed from 1 to N-1, and insulation (or voltage withstanding) test between any two points can be realized only through N-1 times of insulation (or voltage withstanding) test. The other method is a multipoint-to-multipoint binary recombination test method, namely, all insulation and voltage resistance test points are continuously subjected to binary and recombination for testing until the number of test points after binary is 1, and if N points are subjected to insulation (or voltage resistance) test, the binary recombination test method theoretically only needs log2And the insulation (or voltage resistance) test between any two points can be realized by N times of tests.
Example two:
in order to further illustrate the embodiments of the present invention, the following detailed and complete discussion of the technical solutions of the present invention is provided with reference to the accompanying drawings.
As shown in fig. 1, the utility model relates to a general automatic test system of cable based on CPCI bus adopts "modularization + integrates" design theory, and each functional module contains: the device comprises an insulation withstand voltage measuring module, a display keyboard combination, a measurement and control combination and a signal switching combination. Wherein, observe and control and include EMI filter module, relay drive power module and 3U's CPCI cage combination in the combination, signal switching combination contains 6U relay cage combination and cable switching combination. And finally, all the functional modules are integrated in the movable cabinet, and four small wheels are arranged at the bottom of the movable cabinet, so that the movable cabinet is convenient to move and can meet the requirements of different distributed test tasks in different plants and different areas.
As shown in fig. 2, the system principle of the universal automatic test system for cables based on CPCI bus according to the present invention is described, which mainly comprises: the device comprises an embedded controller (1), a display keyboard combination (7), a CPCI bus back plate (2), a digital IO card module PXI-6509(3), a digital multimeter module PXI-4065(4), a program-controlled insulation voltage-withstand measurement module (14), a CPCI power module (5), an EMI filter (8), a relay driving power supply (10), a communication back plate (9), a high-voltage-resistant relay board (11), a meter pen switching board (12), a cable switching combination (15) and the like. The embedded controller (1), the CPCI bus backboard (2), the digital IO card module PXI-6509(3), the digital multimeter module PXI-4065(4) and the CPCI power module (5) are integrated in the 3U CPCI cage assembly (6), and the 3U CPCI cage assembly (6) provides a supporting and fixing effect for each module. The communication back plate (9), the high-voltage-resistant relay plate (11) and the meter pen switching plate (12) are integrated in the 6U relay cage combination (13), and the 6U relay cage combination (13) also provides a supporting and fixing effect for each module.
Embedded controller (1): for the control core of the cable universal automatic test system, test main control interface software and a measurement and control algorithm are realized through an embedded controller (1), the processor is inserted into a 3U cage (6) and connected with a CPCI bus backboard (2), communication with a digital I/O card module PXI-6509(3) and a digital multimeter module PXI-4065(4) is realized through a CPCI bus, communication with a program control insulation voltage resistance measurement module (14) is realized through an RS-232 serial bus, and communication with a display keyboard combination (7) is realized through a VGA video line.
Display keypad assembly (7): the test system is an interactive interface between a test operator and the embedded controller (1), and is connected with the embedded controller (1) through a VGA video line, so that the functions of command sending and control, real-time display and monitoring of test data, test data processing and the like are realized.
Digital IO card module PXI-6509 (3): the test device is provided with 96 paths of digital I/O (input/output), 5V TTL/CMOS (transistor-transistor logic/complementary metal oxide semiconductor) electrical level is output, a digital IO card module PXI-6509(3) is inserted into a 3U cage (6) and connected with a CPCI bus backboard (2), a control signal of an embedded controller (1) is received through the CPCI bus, then a digital IO signal is output to a high-voltage-resistant relay board (11) and a meter pen switching board (12), and the relay suction disconnection on the high-voltage-resistant relay board (11) and the meter pen switching board (12) is controlled and driven to be completed, so that the function of switching and connecting a test point and a test instrument is realized.
Digital multimeter module PXI-4065 (4): the device is used for high-precision four-wire resistor measurement, is inserted into a 3U cage (6) and is connected with a CPCI bus back plate (2), communicates with an embedded controller (2) through a CPCI bus, and a test end of the device is connected with a meter pen switching plate (12) through a communication cable and a communication back plate (9) to realize conduction test and test data acquisition and transmission functions.
Program-controlled dielectric withstand voltage measuring module (14): the test device is used for insulation test and voltage-withstand test, is connected with the embedded controller (1) through an RS-232 bus, and is connected with the meter pen switching board (12) through a communication cable and a communication back board (9) at a test end, so that the insulation test, the voltage-withstand test and the test data acquisition and transmission functions are realized.
Meter pen switching board (12): the testing device is inserted into a 6U cage (13) and connected with a communication backboard (9), is communicated with a high-voltage-resistant relay board (6) through the communication backboard (9), is connected with a digital multimeter module PXI-4065(4) and a program-controlled insulation voltage-resistant measurement module (14) through the communication backboard and a communication cable, and realizes the gating connection of a tested signal and a testing end of a testing instrument.
High voltage resistant relay board (6): the test signal is inserted into a 6U cage (13) and is connected with a communication back plate (9) to realize communication with a meter pen switching plate (12), so that the gating connection of the test signal and a test instrument is realized; all points to be tested of the cable to be tested are connected with the high-voltage-resistant relay board (6) through the cable switching combination (15) and the switching cable, so that the switching connection between the test points and the test meter pen is realized.
CPCI power supply module (5): the CPCI bus back board is inserted into a 3U cage (6) and connected with the CPCI bus back board (2) through a power supply line to provide working power supplies for the embedded controller (1), the digital IO card module PXI-6509(3) and the digital multimeter module PXI-4065 (4).
Relay drive power supply (10): the high-voltage relay is connected with the communication back plate (9) to provide working voltage for the relays on the high-voltage relay board (11) and the meter pen switching board (12).
EMI filtering (8): the 220Vac alternating current commercial power is filtered, high-frequency interference is reduced, and clean and stable alternating current power supply is provided for the CPCI power supply module (5) and the relay driving power supply (10).
Cable switching combination (15): and connecting the cable to be tested with the high-voltage-resistant relay board (6) to realize grouping, sorting and switching of the signals to be tested.
The conduction test of the cable universal automatic test system adopts a four-wire system to test the resistance, the working principle of which is shown in figure 3,
the realization method comprises the following steps: two leads are led out from each point to be tested of the cable to be tested, and are connected to the 'A +' and 'V +' of the digital multimeter module PXI-4065(4) through the cable switching combination (6), the high-voltage resistant relay board (6) and the meter pen switching board (12), or are connected to the 'A-' and 'V-', when conducting test is carried out, the embedded controller (1) controls the gating of corresponding relays on the high-voltage resistant relay board (6) and the meter pen switching board (12), so that the point to be tested X1:1 and the point to be tested X1:2 at two ends of the cable to be tested are respectively connected to the 'A +', the 'V +' and the 'V-', the digital multimeter module PXI-4065(4) works in a four-wire system resistance testing mode, and the influence of the cable and the return line resistance is eliminated due to measurement, the resistance measurement precision can be greatly improved.
The working principle of the high-voltage relay drive in the utility model is shown in fig. 4, the relay drive adopts ULN2803 drive chips, and one chip can drive 8 relays; because the number of the relays is large, the control signal adopts a mode of 38 decoders 74HCT138+ latches 74HCT259, the number of control signal channels is reduced, and therefore hardware cost is reduced. After a control signal transmitted by the digital IO module PXI-6059 is subjected to signal conditioning of the 74HCT244, a part of the signal is directly sent to the 74HCT259 latch, and a part of the signal is decoded by the 74HCT138 and then used for enabling the 74HCT259 latch. The control strategy can realize the purpose of controlling and driving 64 relays by only 9 paths of digital IO control signals.
The insulation (or voltage withstanding) test of the cable universal automatic test system is provided with two test methods, so that a tester can flexibly select the test method according to the test requirement.
A test method is a single-point-to-multipoint insulation (or voltage withstanding) test method, the test flow is shown in figure 5, the test is started, test points are grouped according to test voltage, theoretical mutual insulation points are obtained, the number of the theoretical mutual insulation points is N, the ith (i is 1,2,3, …, N-1) to-be-tested points are controlled to be connected with an insulation meter pen +, the other (i +1) -N to-be-tested points are controlled to be connected with the insulation meter pen-, insulation test is conducted, whether single test data are qualified or not is judged, if not qualified, a cycle ending test task is directly skipped, if qualified, the next cycle test is continued, and the test is ended until i is N-1.
The other method is a multipoint-to-multipoint dichotomous recombination testing method, the testing process is shown in fig. 6, and the method comprises the following steps:
① sets the test point number N to 2n(n>0) The minimum value M of each numerical value is divided into two subsets of front M/2 and back M/2 for M. Dividing the first M/2 test points into one group and attracting to one end of a test meter pen, and taking the second M/2 test points as the other group and attracting to the other end of the test meter pen, and carrying out insulation and voltage resistance test on the two groups in the state;
② dividing the front M/2 points and the back M/2 subsets in ① into two parts, wherein the M points can be divided into (M/4)1、(M/4)2、(M/4)3、(M/4)4Four subsets of which (M/4)1、(M/4)2The first M/2 subset is the second result, (M/4)3、(M/4)4For the latter M/2 subset dichotomized result, will (M/4)1、(M/4)3Are combined into a group and are sucked to one end of the meter pen, (M/4)2、(M/4)4Combining the two groups into one group and attracting the combined group to the other end of the meter pen, and carrying out insulation and voltage resistance test on the two groups in the state;
dividing each M/4 subset into two M/8 subsets in front and back, combining the 4 front M/8 subsets into one group, combining the other 4 back M/8 subsets into another group, respectively attracting the two groups to two ends of a meter pen, and carrying out insulation and voltage resistance test on the two groups in the state;
and fourthly, repeating the binary recombination process until each subset element is 1 after binary recombination, and performing recombination and voltage insulation and resistance test. And (5) finishing the test by the binary recombination method.
The binary recombination test method can greatly improve the insulation (or voltage resistance) test speed, and if the insulation (or voltage resistance) test is carried out on N points, the binary recombination test method theoretically only needs log2And the insulation (or voltage resistance) test between any two points can be realized by N times of tests.
Compared with the prior art, the utility model the advantage lie in: the utility model is based on CPCI bus development design, adopts the design concept of 'modularization + integration', and has the advantages of short development period, good maintainability, good expandability and the like; the software programming adopts a visual Labview to carry out a building block lap joint type programming mode, the programming development is simple, and the debugging is convenient; the conduction test adopts a four-wire system to test the resistance, eliminates the influence of the resistance of a test return line and improves the resistance measurement precision; compared with the traditional test method, the insulation (or voltage resistance) test method adopts a single-point-to-multipoint test method and a binary recombination test method, shortens the test time by 50-90%, and greatly improves the test efficiency.
The utility model discloses though be based on the general automatic test system of cable of CPCI bus, but not only confine to and carry out the electric capability test to the cable, also can carry out the electric capability test in other fields as a general test platform. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
The utility model is based on CPCI bus development design, adopts the design concept of 'modularization + integration', and has the advantages of short development period, good maintainability, good expandability and the like; the software programming adopts a visual Labview to carry out a building block lap joint type programming mode, the programming development is simple, and the debugging is convenient; the conduction test adopts a four-wire system to test the resistance, eliminates the influence of the resistance of a test return line and improves the resistance measurement precision; the insulation (or voltage resistance) test adopts a single-point-to-multipoint test method and a binary recombination test method.
For practicing thrift development cost, the utility model discloses a CPCI bus framework that the modularization integrated level is higher, the sexual valence is higher. The utility model discloses based on CPCI bus, adopt "modularization + integrate" design theory, developed the general automatic test system of movable cable, adopt visual programming software Labview to carry out main control interface and control algorithm programming, possess functions such as user's autonomic configuration test file, system self-checking, passive conduction test, insulation test, withstand voltage test, automatic generation report form, failure diagnosis, can satisfy the cable electrical performance test demand of different models, different specifications, can effectively improve cable test efficiency. Meanwhile, the test system has the advantages of short development period, low cost, mobility, simplicity in operation, high reliability and the like, and has wide application market and popularization prospect in the field of cable detection.
A cable general automatic test system based on CPCI bus is characterized in that: the system comprises a program-controlled insulation voltage-withstand measurement module, a display keyboard combination, a measurement and control combination and a signal switching combination; the program-controlled insulation voltage-withstand measurement module is respectively connected with the measurement and control combination and the signal switching combination; the measurement and control combination is connected with the display keyboard combination, the measurement and control combination comprises an EMI filtering module, a relay driving power supply module and a 3U CPCI cage combination, and the EMI filtering module is respectively connected with the relay driving power supply module and the 3U CPCI cage combination; the program-controlled insulation voltage-withstand measurement module is connected with a CPCI cage combination of the measurement and control combination 3U; the signal switching combination comprises a 6U relay cage combination and a cable switching combination, and the 6U relay cage combination for signal switching is connected with the cable switching combination; the program-controlled insulation voltage-withstand measuring module is connected with the signal switching combination.
The 3U CPCI cage combination comprises a CPCI bus backboard (2), an embedded controller (1), a plurality of digital IO card modules PXI-6509(3), a digital multimeter module PXI-4065(4) and a power supply module, wherein the CPCI bus backboard (2) is respectively connected with the embedded controller (1) of the embedded controller (1), the plurality of digital IO card modules PXI-6509(3), the digital multimeter module PXI-4065(4) and the power supply module;
the 6U relay cage combination (13) comprises a communication back plate (9), a plurality of high-voltage-resistant relay plates (11) and a meter pen switching plate (12), wherein the communication back plate (9) is respectively connected with the plurality of high-voltage-resistant relay plates (11) and the meter pen switching plate (12);
the program-controlled voltage-insulating measurement module is connected with an embedded controller (1) of a 3U CPCI cage combination of a measurement and control combination, and the program-controlled voltage-insulating measurement module is connected with a communication back plate (9) of a signal switching combination; a plurality of high-voltage-resistant relay boards (11) of the 6U relay cage combination (13) are connected with the cable switching combination.
The device also comprises a movable cabinet, wherein four small wheels are arranged at the bottom of the movable cabinet, and a program-controlled insulation voltage-resistant measurement module, a display keyboard combination, a measurement and control combination and a signal switching combination are all arranged in the movable cabinet.
Claims (2)
1. A cable general automatic test system based on CPCI bus is characterized in that: the system comprises a program-controlled insulation and voltage-withstand measurement module, a display keyboard combination, a measurement and control combination and a signal switching combination, wherein the program-controlled insulation and voltage-withstand measurement module is respectively connected with the measurement and control combination and the signal switching combination, and the measurement and control combination is also connected with the display keyboard combination and the signal switching combination;
the measurement and control combination comprises an EMI filtering module (8), a relay driving power supply module (10) and a 3U CPCI cage combination (6), wherein the 3U CPCI cage combination (6) comprises a CPCI bus back plate (2), an embedded controller (1), a plurality of digital IO card modules PXI-6509(3), a digital multimeter module PXI-4065(4) and a CPCI power supply module (5); the CPCI bus backboard (2) is respectively connected with the embedded controller (1), the plurality of digital IO card modules PXI-6509(3), the digital multimeter modules PXI-4065(4) and the power supply module; the EMI filtering module (8) is respectively connected with the relay driving power module (10) and the CPCI power module (5); the CPCI power supply module (5) is connected with the CPCI bus backboard (2);
the signal switching combination comprises a 6U relay cage combination (13) and a cable switching combination (15), wherein the 6U relay cage combination (13) comprises a communication back plate (9), a plurality of high-voltage-resistant relay plates (11) and a gauge pen switching plate (12); the communication back plate (9) is respectively connected with a plurality of high-voltage-resistant relay boards (11) and a meter pen switching board (12), and the plurality of high-voltage-resistant relay boards (11) are connected with a cable switching combination (15);
the program-controlled voltage-insulating measurement module (14) is connected with the embedded controller (1) of the 3U CPCI cage combination (6) of the measurement and control combination, and the program-controlled voltage-insulating measurement module (14) is connected with the communication back plate (9) of the signal switching combination; the keyboard display combination (7) is connected with the embedded controller (1) of the 3U CPCI cage combination (6) of the measurement and control combination; the digital multimeter module PXI-4065(4) of the 3U CPCI cage combination (6) of the measurement and control combination is connected with the communication back panel (9) of the 6U relay cage combination (13) of the signal switching combination; the digital IO card module PXI-6509(3) of the 3U CPCI cage combination (6) of the measurement and control combination is connected with the communication back plate (9) of the 6U relay cage combination (13) of the signal transfer combination; the relay driving power supply module (10) of the measurement and control combination is connected with the communication back plate (9) of the 6U relay cage combination (13) of the signal transfer combination.
2. A CPCI bus based cable generic automatic test system according to claim 1, characterized by: the device also comprises a movable cabinet, wherein four small wheels are arranged at the bottom of the movable cabinet, and a program-controlled insulation voltage-resistant measurement module, a display keyboard combination, a measurement and control combination and a signal switching combination are all arranged in the movable cabinet.
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| CN110196381A (en) * | 2019-06-26 | 2019-09-03 | 北京航天新风机械设备有限责任公司 | A kind of cable general purpose automatic test system based on cpci bus |
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| CN110196381A (en) * | 2019-06-26 | 2019-09-03 | 北京航天新风机械设备有限责任公司 | A kind of cable general purpose automatic test system based on cpci bus |
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