CN115097348A - Universal testing device and method for multi-channel redundant power supply module of diesel locomotive - Google Patents
Universal testing device and method for multi-channel redundant power supply module of diesel locomotive Download PDFInfo
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Abstract
The invention discloses a universal testing device and a universal testing method for a multi-channel redundant power supply module of an internal combustion locomotive, wherein the universal testing device comprises the following steps: the signal conditioning module is used for carrying out half-load, full-load, overcurrent protection and load sudden change conditioning on the load of the power supply module to be tested; a relay matrix module; the first measuring instrument is used for measuring the voltage and the resistance of the power supply module to be tested; the second measuring instrument is used for acquiring the output voltage waveform and the voltage phase difference of the power supply module to be tested; relay X0, programmable power supply, industrial computer. The invention can simultaneously carry out multi-channel test on the power supply modules of a plurality of channels, so that the test points of the experiment table are comprehensive, the operation is simple and convenient, the field space occupancy rate of the test device is low, and the equipment maintenance is simple and convenient; the system is easy to maintain and expand functions, has the advantages of high utilization rate, convenience and quickness in operation, low price, low site space occupation rate and small equipment management workload, and can meet the requirement of automatic testing of multiple locomotive multi-channel redundant power supply modules.
Description
Technical Field
The invention relates to the technical field of testing devices, in particular to a universal testing device and method for a multi-channel redundant power supply module of a diesel locomotive.
Background
The power module is the core of the power supply of the microcomputer control system of the diesel locomotive, and is generally arranged in a power supply cabinet; the main function is that the voltage is converted into the power supply of vehicle-mounted network equipment such as vehicle-mounted microcomputer, display screen, sensor, etc., and the voltage stabilizer also has the functions of voltage stabilization, filtering, overcurrent protection, overvoltage protection, undervoltage protection, etc.
The universal testing device for the power module of the diesel locomotive is used for detecting the functions and performance indexes of the power module, determining the technical state of the power module and playing an important role in the maintenance and manufacturing industries of the power module of the diesel locomotive. The existing locomotive power module testing device is basically designed for a single-channel or two-channel locomotive power module, and has the defects of incomplete test item point, low utilization rate and inconvenient operation of a test bed; the testing device can test various locomotive power supply modules and has comprehensive testing coverage, and the defects of high price, high site space occupancy rate and large equipment management workload exist.
Disclosure of Invention
The invention provides a general testing device and method for a multi-channel redundant power supply module of an internal combustion locomotive, which aim to overcome the technical problem.
In order to realize the purpose, the technical scheme of the invention is as follows:
a general testing arrangement of redundant power module of diesel locomotive multichannel, includes a plurality of power modules that await measuring, includes: the system comprises a plurality of signal conditioning modules, a relay matrix module, a first measuring instrument, a second measuring instrument, a relay X0, a programmable power supply and an industrial personal computer;
the signal conditioning module is used for carrying out half-load, full-load, overcurrent protection and load sudden change conditioning on the load of the power supply module to be tested;
the relay matrix module is used for controlling the on-off of the power supply module to be tested and the first measuring instrument and the on-off of the power supply module to be tested and the second measuring instrument;
the first measuring instrument is used for measuring the voltage and the resistance of the power supply module to be tested;
the second measuring instrument is used for acquiring the output voltage waveform and the voltage phase difference of the power supply module to be tested;
the relay X0 is used for controlling the on-off between the input end of the power supply module to be tested and the program control power supply;
the program-controlled power supply is used for supplying power to the industrial personal computer and the power supply module to be tested;
the industrial personal computer is used for receiving signals of the first measuring instrument and the second measuring instrument and sending test signals to the signal conditioning module so as to test the power supply module to be tested.
Furthermore, the signal conditioning module comprises a first fixed-value resistor, a second fixed-value resistor, an electronic load, a short-circuit module and a high-speed load switching module; the high-speed load switching module comprises a first high-speed load switching circuit A1, a second high-speed load switching circuit A2, a third high-speed load switching circuit A3 and a fourth high-speed load switching circuit A4;
the first constant resistor is connected with the output end of the first high-speed load switching circuit A1; the second constant value resistor is connected with the output end of the second high-speed load switching circuit A2;
the short-circuit module is connected with the output end of the fourth high-speed load switching circuit A4;
the electronic load is connected with the output end of the third high-speed load switching circuit A3;
the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 are all connected with the output end of the power supply module to be tested.
Further, the system also comprises an I/O module;
the relay X0, the relay matrix module, the first fixed value resistor, the second fixed value resistor and the short circuit module are all connected with the industrial personal computer through the I/O module.
Furthermore, the signal conditioning module also comprises a plurality of interfaces of the piece to be tested;
the output end of the power module to be tested is respectively connected with the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 through the device to be tested interface.
Further, the first high-speed load switching circuit a1, the second high-speed load switching circuit a2, the third high-speed load switching circuit A3 and the fourth high-speed load switching circuit a4 have the same circuit structure, including: the circuit comprises a buffer, an inverter, a photoelectric coupler, a comparator, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a field effect transistor;
the output end of the power supply module to be tested is connected with one end of the second resistor R2; the other end of the second resistor R2 is connected with the third resistor R3; the voltage stabilizing diode Z1 is connected with the second resistor R2 in parallel;
the other end of the third resistor R3 is connected with a pin 1 of the photoelectric coupler; a pin 2 of the photoelectric coupler is connected with a low level; a pin 4 of the photoelectric coupler is grounded; a pin 3 of the photoelectric coupler is connected with the phase inverter; the other end of the phase inverter is connected with the buffer, and the other end of the buffer is connected with the I/0 module;
the junction of the pin 2 of the field effect transistor and the first resistor R1 is connected with the pin 1 of the comparator; pin 2 of the comparator is connected with the I/0 module;
A testing method of a universal testing device of a multi-channel redundant power supply module of an internal combustion locomotive comprises the following steps:
s1: the model, the number, the name of an operator and the testing time of a power module to be tested are recorded in an industrial personal computer;
s2: reading a first resistance value of the input end of a power supply module to be tested through a first measuring instrument; if the first resistance value is larger than a first resistance threshold value, executing S3, otherwise, ending the test;
s3: reading a second resistance value of the output end of the power supply module to be tested through the first measuring instrument; if the second resistance value is smaller than a second resistance threshold value, executing S4, otherwise, ending the test;
s4: setting a first protection current threshold on the first high-speed load switching circuit a 1; setting the output voltage and the first output current value of the programmable power supply, connecting the first fixed-value resistor to a first high-speed load switching circuit A1, connecting the input end of the power supply to be tested to the programmable power supply, and disconnecting the programmable power supply if the first high-speed load switching circuit A1 outputs a high level, so that the test is finished; otherwise, executing S5;
s5: reading a first voltage value of a power module to be tested through a first measuring instrument, if an error between the first voltage value and a nominal voltage value of the power module to be tested is smaller than or equal to a first voltage error threshold value, executing S6, otherwise, ending the test;
s6: carrying out undervoltage test, overvoltage test and reverse connection protection test on the power supply module to be tested;
s7: setting a second protection current threshold on the second high-speed load switching circuit a 2; setting a second output current value of the programmable power supply, connecting the second constant value resistor to a second high-speed load switching circuit A2, and disconnecting the programmable power supply if the second high-speed load switching circuit A2 outputs a high level, and ending the test; otherwise, executing S8;
s8: reading a second voltage value of a power module to be tested through a first measuring instrument, if an error between the second voltage value and a nominal voltage value of the power module to be tested is smaller than or equal to a second voltage error threshold value, executing S9, otherwise, ending the test;
s9: carrying out full load test and power efficiency test on the power module to be tested;
s10: connecting a second measuring instrument with the input end of a module to be tested through a relay matrix module, and carrying out ripple and noise test, module startup delay time test, startup rise time test, shutdown hold time test and startup overshoot test on the power supply module to be tested;
s11: setting a third protection current threshold on the third high-speed load switching circuit a 3; the electronic load is connected to a third high-speed load switching circuit A3, if the third high-speed load switching circuit A3 outputs high level, the program-controlled power supply is disconnected, and the test is finished; otherwise, executing S12;
s12: setting a fourth current value passing through the electronic load, and carrying out an overcurrent protection test and a load sudden change test on the power module to be tested; execution continues with S13;
s13: setting a fourth protection current threshold on the fourth high-speed load switching circuit a 4; the short circuit module is connected to a fourth high-speed load switching circuit A4, if the fourth high-speed load switching circuit A4 outputs a high level, the program-controlled power supply is disconnected, and the test is finished; otherwise, executing S14;
s14: reading a third voltage value of a power module to be tested through a first measuring instrument, if an error between the third voltage value and a nominal voltage value of the power module to be tested is smaller than or equal to a third voltage error threshold value, determining that the power module to be tested has no fault, otherwise, determining that the power module to be tested has a fault;
s15: and outputting a test report according to the S1-S14.
Has the advantages that: according to the general testing device and method for the multi-channel redundant power supply module of the diesel locomotive, the multi-channel testing can be simultaneously carried out on the power supply modules of multiple channels by arranging the plurality of signal conditioning modules, the test points of the experiment table are comprehensive by arranging the high-speed load switching module, the operation is simple and convenient, the field space occupancy rate of the testing device is low, and the equipment maintenance is simple and convenient; the system is easy to maintain and expand functions, has the advantages of high utilization rate, convenience and quickness in operation, low price, low site space occupation rate and small equipment management workload, and can meet the requirement of automatic testing of multiple locomotive multi-channel redundant power supply modules.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on the drawings without inventive labor.
FIG. 1 is a schematic view of a testing apparatus according to the present invention;
FIG. 2 is a schematic diagram of a high speed load switching circuit according to the present invention;
FIG. 3 is a schematic diagram of an input/output voltage acquisition circuit of the power module to be tested according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provides a general testing device for a multi-channel redundant power supply module of an internal combustion locomotive, which comprises a plurality of power supply modules to be tested, a plurality of signal conditioning modules, a relay matrix module, an electronic load, a universal meter, an oscilloscope, a programmable power supply and an industrial personal computer, wherein the signal conditioning modules are connected with the relay matrix module; the system also comprises an I/O module;
the signal conditioning module is used for carrying out half-load, full-load, overcurrent protection and load sudden change conditioning on the load of the power supply module to be tested;
specifically, the signal conditioning module comprises a first fixed-value resistor, a second fixed-value resistor, a short-circuit module and a high-speed load switching module; the high-speed load switching module comprises a first high-speed load switching circuit A1, a second high-speed load switching circuit A2, a third high-speed load switching circuit A3 and a fourth high-speed load switching circuit A4;
the first constant resistor is connected with the output end of the first high-speed load switching circuit A1; the second constant value resistor is connected with the output end of the second high-speed load switching circuit A2;
the short-circuit module is connected with the output end of the fourth high-speed load switching circuit A4; the short circuit module is a module capable of connecting a circuit in a short circuit state, and is a common wire in the embodiment.
The electronic load is connected with the output end of the third high-speed load switching circuit A3;
the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 are all connected with the output end of the power module to be tested;
the relay matrix module is used for controlling the on-off of the power supply module to be tested and the first measuring instrument and the on-off of the power supply module to be tested and the second measuring instrument; the first measuring instrument is used for measuring the voltage and the resistance of the power supply module to be tested; the second measuring instrument is used for acquiring the output voltage waveform and the voltage phase difference of the power supply module to be tested;
specifically, the output end of the relay matrix module is respectively connected with the multimeter and the oscilloscope; the output end of the power supply module to be tested is connected with the input end of the relay matrix module; in the embodiment, the first measuring instrument is a multimeter, and the second measuring instrument is an oscilloscope;
the relay X0 is used for controlling the on-off between the input end of the power supply module to be tested and the program control power supply;
specifically, the input end of the power supply module to be tested is respectively connected with the relay matrix module and the relay X0; the other end of the relay X0 is connected with the program control power supply and the I/O module respectively;
the programmable power supply is used for supplying power to the industrial personal computer and the power supply module to be tested; the industrial personal computer is used for receiving signals of the first measuring instrument and the second measuring instrument and sending test signals to the signal conditioning module so as to test the power supply module to be tested.
Specifically, the electronic load, the universal meter, the oscilloscope, the programmable power supply and the I/0 module are all connected with the industrial personal computer. The industrial personal computer in the embodiment adopts a common computer. The relay X0, the relay matrix module, the first fixed value resistor, the second fixed value resistor and the short circuit module are all connected with the industrial personal computer through the I/O module.
Preferably, the signal conditioning module further comprises a plurality of interfaces to be tested; the output end of the power module to be tested is respectively connected with the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 through the interface of the device to be tested.
Preferably, the first high-speed load switching circuit a1, the second high-speed load switching circuit a2, the third high-speed load switching circuit A3 and the fourth high-speed load switching circuit a4 have the same circuit structure, including: the circuit comprises a buffer, an inverter, a photoelectric coupler, a comparator, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a field effect transistor;
the output end of the power supply module to be tested is connected with one end of the second resistor R2; the other end of the second resistor R2 is connected with the third resistor R3; the voltage stabilizing diode Z1 is connected with the second resistor R2 in parallel;
the other end of the third resistor R3 is connected with a pin 1 of the photoelectric coupler; a pin 2 of the photoelectric coupler is connected with a low level; a pin 4 of the photoelectric coupler is grounded; a pin 3 of the photoelectric coupler is connected with the phase inverter; the other end of the phase inverter is connected with the buffer, and the other end of the buffer is connected with the I/0 module;
the junction of the pin 2 of the field effect transistor and the first resistor R1 is connected with the pin 1 of the comparator; pin 2 of the comparator is connected with the I/0 module;
Specifically, the signal conditioning modules are arranged in two 4U standard chassis, namely a signal conditioning box 1 and a signal conditioning box 2, wherein the high-speed load switching module is arranged in the signal conditioning box 1, the constant-value resistor and the short-circuit module are both arranged in the signal conditioning box 2, and the constant-value resistor and the high-speed load switching module are connected by a rectangular heavy-load connector; the interface of the piece to be tested of the signal conditioning module is arranged on the signal conditioning box 1; the power supply module to be tested is also connected with the signal conditioning box 1 in the signal conditioning module through the rectangular heavy-load connector. In this embodiment, the signal conditioning box 1 includes 7 sets of high-speed load switching modules, and can test 7 paths of output ends of the power supply to be tested at the same time, each set of high-speed load switching modules includes 4 high-speed load switching circuits, and there are 28 paths of high-speed load switching circuits, correspondingly, the signal conditioning box 2 includes 14 sets of fixed-value resistors and radiator fan pins, and the corresponding signal conditioning box 2 can be replaced for different products to perform function tests. Wherein the radiator fan needle can dispel the heat to the definite value resistance.
The high-speed load switching circuit in the high-speed load switching module is composed of a high-power field effect transistor, a photoelectric coupler, a comparator, a buffer and the like, and is used for replacing a traditional mechanical relay to carry out load switching, so that the influence of a traditional contactor on a test result is reduced, and the switching speed of the traditional contactor is improved; the module can also carry out protection current setting, and the protection current set by the computer is compared with the actual test current, so that the damage of a fault test product to equipment and the fault test product to the equipment and the fault test product are avoided.
The industrial personal computer in the embodiment comprises a digital quantity output board card, a digital quantity acquisition board card, an analog quantity output board card, an analog quantity acquisition board card and a USB expansion board card which are integrated in a case, and a display and a keyboard and a mouse which are externally hung on the case.
The embodiment also discloses a testing method of the universal testing device for the multi-channel redundant power supply module of the diesel locomotive, which comprises the following steps:
s1: the model, the number, the name of an operator and the testing time of a power module to be tested are recorded in an industrial personal computer;
s2: reading a first resistance value of an input end of a power supply module to be tested through a multimeter; if the first resistance value is larger than the first resistance threshold value, executing S3, otherwise, ending the test;
specifically, in this embodiment, the relay matrix module is controlled to be X1.1 closed by the computer through the digital quantity I/0 module, the input end of the module to be tested is connected to the multimeter, the computer sets the multimeter as an ohmic contact through the serial interface, performs an input impedance test on the module to be tested, reads the first resistance value, determines a relationship between the first resistance value and a set first electronic threshold, and if the first resistance value is greater than 1k Ω (first electronic threshold), continues the test, otherwise, ends the test.
S3: reading a second resistance value of the output end of the power supply module to be tested through a universal meter; if the second resistance value is smaller than a second resistance threshold value, executing S4, otherwise, ending the test;
specifically, in this embodiment, the computer controls X2.1 to X8.1 of the relay matrix module to be closed through the digital quantity I/0 module, connects the output end of the module to be tested with the multimeter, sets the multimeter to be an ohmic contact through the serial interface, performs an input impedance test on the module to be tested, reads the second resistance value, determines a relationship between the first resistance value and the set second electronic threshold value, and if the first resistance value is less than 100 Ω (the second electronic threshold value), continues the test, otherwise, continues the test.
S4: setting a first protection current threshold on the first high-speed load switching circuit a 1; setting the output voltage and the first output current value of the programmable power supply, accessing the first fixed-value resistor to a first high-speed load switching circuit A1, accessing the input end of the power supply to be tested to the programmable power supply, and disconnecting the programmable power supply if the first high-speed load switching circuit A1 (the connection part of a pin 3 of a comparator and a fourth resistor R4) outputs a high level, thus finishing the test; otherwise, executing S5;
specifically, in this embodiment, the input level is a high level when the input level is greater than 3.3v, otherwise, the input level is a low level; setting a first protection current threshold value 30A between a pin 2 of a comparator of a first high-speed load switching circuit A1 and the I/0 module through an industrial personal computer, connecting the first constant-value resistor to a first high-speed load switching circuit A1 to enable the power supply to be tested to be in a half-load state, setting the voltage of a programmable power supply to be 74VDC through a serial interface by the computer, setting a first output current value to be 5A, closing a relay X0, connecting the input end of the power supply to be tested to the programmable power supply, and disconnecting the programmable power supply if a high level is output at the connection position of a pin 3 of the comparator of the first high-speed load switching circuit A1 and a fourth resistor R4, and ending the test; otherwise, executing S5;
s5: reading a first voltage value of a power supply module to be tested through a multimeter, if an error between the first voltage value and a nominal voltage value of the power supply module to be tested is smaller than or equal to a first voltage error threshold value, executing S6, otherwise, ending the test;
specifically, in this embodiment, the multimeter is adjusted to a voltage range, a first voltage value is read, and if an error between the first voltage value and a nominal voltage value of the power supply module to be tested is less than or equal to a first voltage error threshold value of 5%, the test is continued; otherwise, the test is finished.
S6: carrying out undervoltage test, overvoltage test and reverse connection protection test on the power supply module to be tested;
s7: setting a second protection current threshold on the second high-speed load switching circuit a 2; setting a second output current value of the programmable power supply, connecting the second constant value resistor to a second high-speed load switching circuit A2, and disconnecting the programmable power supply if the second high-speed load switching circuit A2 outputs a high level, thus finishing the test; otherwise, executing S8;
specifically, in this embodiment, a second protection current threshold value 30A between a pin 2 of a comparator of the second high-speed load switching circuit a2 and the I/0 module is set by an industrial personal computer, the second fixed-value resistor is connected to the second high-speed load switching circuit a2, so that the power supply to be tested is in a full-load state, the computer sets the voltage of the programmable power supply to 74VDC and the second output current value to 8A through a serial interface, and if a pin 3 of the comparator of the second high-speed load switching circuit a2 outputs a high level at a connection position with the fourth resistor R4, the programmable power supply is disconnected, and the test is finished; otherwise, executing S8;
s8: reading a second voltage value of a power supply module to be tested through a multimeter, if an error between the second voltage value and a nominal voltage value of the power supply module to be tested is smaller than or equal to a second voltage error threshold value, executing S9, otherwise, ending the test;
specifically, a second voltage value is read at the moment, and if the error between the second voltage value and the nominal voltage value of the power module to be tested is less than or equal to 5% of a second voltage error threshold value, the test is continued; otherwise, the test is finished.
S9: carrying out full load test and power supply efficiency test on the power supply module to be tested;
s10: connecting an oscilloscope with the input end of a module to be tested through a relay matrix module, and carrying out ripple and noise test, module startup delay time test, startup rise time test, shutdown hold time test and startup overshoot test on the power supply module to be tested;
s11: setting a third protection current threshold on the third high-speed load switching circuit a 3; the electronic load is connected to a third high-speed load switching circuit A3, if the third high-speed load switching circuit A3 outputs high level, the programmable power supply is disconnected, and the test is finished; otherwise, executing S12;
s12: setting a fourth current value passing through the electronic load, and carrying out an overcurrent protection test and a load sudden change test on the power module to be tested; execution continues with S13;
specifically, in this embodiment, an industrial personal computer is used to set a third protection current threshold 60A between a pin 2 of a comparator of the third high-speed load switching circuit A3 and the I/0 module, and the electronic load is connected to the third high-speed load switching circuit A3, and if a high level is output at a connection between a pin 3 of the comparator of the third high-speed load switching circuit A3 and the fourth resistor R4, the programmable power supply is disconnected, and the test is finished; otherwise, continuing to test; setting the current value of the electronic load through a serial interface by a computer, and carrying out overcurrent protection test and load mutation test on the power module to be tested;
s13: setting a fourth protection current threshold on the fourth high-speed load switching circuit a 4; the short circuit module is connected to a fourth high-speed load switching circuit A4, if the fourth high-speed load switching circuit A4 outputs a high level, the program-controlled power supply is disconnected, and the test is finished; otherwise, executing S14;
s14: reading a third voltage value of a power module to be tested through a multimeter, if an error between the third voltage value and a nominal voltage value of the power module to be tested is smaller than or equal to a third voltage error threshold value, determining that the power module to be tested has no fault, otherwise, determining that the power module to be tested has a fault;
s15: and outputting a test report according to the S1-S14.
Specifically, in the present embodiment,
setting a fourth protection current threshold 200A between a pin 2 of a comparator of a fourth high-speed load switching circuit A4 and the I/0 module through an industrial personal computer, connecting the short-circuit module into the fourth high-speed load switching circuit A4, and disconnecting the program-controlled power supply if a high level is output at the connection part of a pin 3 of the comparator of the fourth high-speed load switching circuit A4 and a fourth resistor R4, and ending the test; otherwise, continuing to test;
and reading a third voltage value, if the error between the third voltage value and the nominal voltage value of the power module to be tested is less than or equal to a third voltage error threshold value of 0.1V, determining that the power module to be tested has no fault, and successfully testing, otherwise, determining that the power module to be tested has a fault. And outputting a test report for recording the record of the whole test process of the test device of the embodiment through the industrial personal computer.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a general testing arrangement of redundant power module of diesel locomotive multichannel, includes a plurality of power modules that await measuring, its characterized in that includes: the system comprises a plurality of signal conditioning modules, a relay matrix module, a first measuring instrument, a second measuring instrument, a relay X0, a programmable power supply and an industrial personal computer;
the signal conditioning module is used for carrying out half-load, full-load, overcurrent protection and load sudden change conditioning on the load of the power supply module to be tested;
the relay matrix module is used for controlling the on-off of the power supply module to be tested and the first measuring instrument and the on-off of the power supply module to be tested and the second measuring instrument;
the first measuring instrument is used for measuring the voltage and the resistance of the power supply module to be tested;
the second measuring instrument is used for acquiring the output voltage waveform and the voltage phase difference of the power supply module to be tested;
the relay X0 is used for controlling the on-off between the input end of the power supply module to be tested and the program control power supply;
the program-controlled power supply is used for supplying power to the industrial personal computer and the power supply module to be tested;
the industrial personal computer is used for receiving signals of the first measuring instrument and the second measuring instrument and sending test signals to the signal conditioning module so as to test the power supply module to be tested.
2. The universal testing device for the multi-channel redundant power supply module of the diesel locomotive according to claim 1, wherein the signal conditioning module comprises a first fixed resistor, a second fixed resistor, an electronic load, a short circuit module and a high-speed load switching module; the high-speed load switching module comprises a first high-speed load switching circuit A1, a second high-speed load switching circuit A2, a third high-speed load switching circuit A3 and a fourth high-speed load switching circuit A4;
the first constant resistor is connected with the output end of the first high-speed load switching circuit A1; the second constant value resistor is connected with the output end of the second high-speed load switching circuit A2;
the short-circuit module is connected with the output end of the fourth high-speed load switching circuit A4;
the electronic load is connected with the output end of the third high-speed load switching circuit A3;
the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 are all connected with the output end of the power supply module to be tested.
3. The universal testing device for the multi-channel redundant power supply module of the diesel locomotive according to claim 2, further comprising an I/O module;
the relay X0, the relay matrix module, the first fixed value resistor, the second fixed value resistor and the short circuit module are all connected with the industrial personal computer through the I/O module.
4. The universal testing device for the multichannel redundant power supply module of the diesel locomotive according to claim 2, wherein the signal conditioning module further comprises a plurality of interfaces of a piece to be tested;
the output end of the power module to be tested is respectively connected with the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 through the device to be tested interface.
5. The universal testing device for the multichannel redundant power supply module of the diesel locomotive according to claim 2, wherein the first high-speed load switching circuit a1, the second high-speed load switching circuit a2, the third high-speed load switching circuit A3 and the fourth high-speed load switching circuit a4 have the same circuit structure, and comprise: the circuit comprises a buffer, an inverter, a photoelectric coupler, a comparator, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a field effect transistor;
the output end of the power supply module to be tested is connected with one end of the second resistor R2; the other end of the second resistor R2 is connected with the third resistor R3; the voltage stabilizing diode Z1 is connected with the second resistor R2 in parallel;
pin 1 of the field effect transistor is connected with the output end of the power supply module to be tested, pin 3 of the field effect transistor is connected with the connection position of the second resistor R2 and the third resistor R3, and pin 2 of the field effect transistor is connected with the first resistor R1; the other end of the first resistor R1 is connected with the first constant value resistor/second constant value resistor/short circuit module/electronic load;
the other end of the third resistor R3 is connected with a pin 1 of the photoelectric coupler; a pin 2 of the photoelectric coupler is connected with a low level; a pin 4 of the photoelectric coupler is grounded; a pin 3 of the photoelectric coupler is connected with the phase inverter; the other end of the phase inverter is connected with the buffer, and the other end of the buffer is connected with the I/0 module;
the junction of the pin 2 of the field effect transistor and the first resistor R1 is connected with the pin 1 of the comparator; pin 2 of the comparator is connected with the I/0 module;
pin 3 of the comparator is connected with a fourth resistor R4, and the other end of the fourth resistor R4 is connected with a high level; the junction of pin 3 of the comparator and the fourth resistor R4 is connected to the I/0 module.
6. The testing method of the universal testing device for the multi-channel redundant power supply module of the diesel locomotive according to any one of claims 1 to 5, characterized by comprising the following steps:
s1: the model, the number, the name of an operator and the test time of a power supply module to be tested are recorded in an industrial personal computer;
s2: reading a first resistance value of the input end of a power supply module to be tested through a first measuring instrument; if the first resistance value is larger than the first resistance threshold value, executing S3, otherwise, ending the test;
s3: reading a second resistance value of the output end of the power supply module to be tested through the first measuring instrument; if the second resistance value is smaller than a second resistance threshold value, executing S4, otherwise, ending the test;
s4: setting a first protection current threshold on the first high-speed load switching circuit a 1; setting the output voltage and the first output current value of the programmable power supply, connecting the first fixed-value resistor to a first high-speed load switching circuit A1, connecting the input end of the power supply to be tested to the programmable power supply, and disconnecting the programmable power supply if the first high-speed load switching circuit A1 outputs a high level, so that the test is finished; otherwise, executing S5;
s5: reading a first voltage value of a power module to be tested through a first measuring instrument, if an error between the first voltage value and a nominal voltage value of the power module to be tested is smaller than or equal to a first voltage error threshold value, executing S6, otherwise, ending the test;
s6: carrying out undervoltage test, overvoltage test and reverse connection protection test on the power supply module to be tested;
s7: setting a second protection current threshold on the second high-speed load switching circuit a 2; setting a second output current value of the programmable power supply, connecting the second constant value resistor to a second high-speed load switching circuit A2, and disconnecting the programmable power supply if the second high-speed load switching circuit A2 outputs a high level, and ending the test; otherwise, executing S8;
s8: reading a second voltage value of a power module to be tested through a first measuring instrument, if an error between the second voltage value and a nominal voltage value of the power module to be tested is smaller than or equal to a second voltage error threshold value, executing S9, otherwise, ending the test;
s9: carrying out full load test and power efficiency test on the power module to be tested;
s10: connecting a second measuring instrument with the input end of a module to be tested through a relay matrix module, and carrying out ripple and noise test, module startup delay time test, startup rise time test, shutdown hold time test and startup overshoot test on the power supply module to be tested;
s11: setting a third protection current threshold on the third high-speed load switching circuit a 3; the electronic load is connected to a third high-speed load switching circuit A3, if the third high-speed load switching circuit A3 outputs high level, the program-controlled power supply is disconnected, and the test is finished; otherwise, executing S12;
s12: setting a fourth current value passing through the electronic load, and carrying out an overcurrent protection test and a load mutation test on the power module to be tested; execution continues with S13;
s13: setting a fourth protection current threshold on the fourth high-speed load switching circuit a 4; the short circuit module is connected to a fourth high-speed load switching circuit A4, if the fourth high-speed load switching circuit A4 outputs a high level, the program-controlled power supply is disconnected, and the test is finished; otherwise, executing S14;
s14: reading a third voltage value of a power module to be tested through a first measuring instrument, if an error between the third voltage value and a nominal voltage value of the power module to be tested is smaller than or equal to a third voltage error threshold value, determining that the power module to be tested has no fault, otherwise, determining that the power module to be tested has a fault;
s15: and outputting a test report according to the S1-S14.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117031161A (en) * | 2023-08-08 | 2023-11-10 | 南京航空航天大学 | Multi-agent technology-based automatic test method for airborne converter |
| WO2024087303A1 (en) * | 2022-10-28 | 2024-05-02 | 中车长春轨道客车股份有限公司 | Auxiliary power supply module checking method and apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087303A1 (en) * | 2022-10-28 | 2024-05-02 | 中车长春轨道客车股份有限公司 | Auxiliary power supply module checking method and apparatus |
| CN117031161A (en) * | 2023-08-08 | 2023-11-10 | 南京航空航天大学 | Multi-agent technology-based automatic test method for airborne converter |
| CN117031161B (en) * | 2023-08-08 | 2024-04-09 | 南京航空航天大学 | Multi-agent technology-based automatic test method for airborne converter |
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