CN117826006A - Self-checking device and self-checking method for output characteristics of program-controlled power supply for spacecraft thermal test - Google Patents

Abstract

The invention provides a self-checking device for the output characteristics of a programmable power supply for a spacecraft thermal test, which comprises a digital multimeter, an electronic load, a sampling resistor, a loop switching device, a computer terminal and a network switch, wherein the digital multimeter is connected in parallel with the sampling resistor to acquire first output characteristic information formed on the sampling resistor, the digital multimeter is connected in parallel with the electronic load through a voltage transmitter to acquire second output characteristic information formed on the electronic load, the computer terminal is in signal connection with the network switch to transmit and receive data, and the network switch is respectively connected with the loop switching device, the digital multimeter and the electronic load; the loop switching device responds to a control signal from the computer terminal to switch one power channel of the program-controlled power supply to be tested into the loop. A self-checking method for the output characteristics of the program-controlled power supply for the spacecraft thermal test is also provided. Therefore, the invention can realize the automatic test of the programmable power supply.

Description

Self-test device and self-test method for output characteristics of programmable power supply for spacecraft thermal test

Technical Field

The present invention relates to the technical field of spacecraft thermal test, and in particular to a self-test device and a self-test method for output characteristics of a programmable power supply for a spacecraft thermal test.

Background technique

The power output device used in the spacecraft thermal test is a program-controlled DC regulated power supply. Due to the large number of power supplies used, a large-scale test will involve thousands of power supplies. Generally, 30 power supplies are fixedly integrated into a 30U high power cabinet.

As the basic infrastructure of the test, the stability and accuracy of the power output of the program-controlled DC regulated power supply are of great significance in the external heat flow simulation. The power supply equipment is subject to standard inspection once a year. However, this standard inspection cycle is not enough to ensure the accuracy of the output parameters of the program-controlled power supply during the test. The test personnel hope to conduct a program-controlled power supply output characteristic test before the test, especially before a large-scale test with many test equipment.

Therefore, a flexible method for automated output characteristic detection of programmable DC regulated power supplies is urgently needed to effectively improve the reliability and accuracy of the test power supplies and provide precise and reliable power output for vacuum thermal tests.

In summary, the existing methods have many problems in practical use, so it is necessary to improve them.

Summary of the invention

In view of the above-mentioned defects, the purpose of the present invention is to provide a self-test device and self-test method for the output characteristics of a programmable power supply for a spacecraft thermal test, so as to realize the automatic detection of the output characteristics of the programmable power supply, thereby improving the reliability and accuracy of the test power supply.

In order to achieve the above-mentioned purpose, on the one hand, the present invention provides a self-test device for the output characteristics of a programmable power supply for a spacecraft thermal test, comprising a digital multimeter, an electronic load, a sampling resistor, a loop switching device, a computer terminal and a network switch, wherein the loop switching device, the sampling resistor and the electronic load are connected in series to form a loop, the loop switching device is connected to the output end of the programmable power supply to be tested so as to controllably switch the power supply channel of the programmable power supply to be tested to connect to the loop, the digital multimeter is connected in parallel to the sampling resistor to collect first output characteristic information formed on the sampling resistor, and the digital multimeter is connected in parallel to the electronic load through a voltage transmitter to collect second output characteristic information formed on the electronic load, the computer terminal is signal-connected to the network switch for data transmission and reception, and the network switch is respectively connected to the loop switching device, the digital multimeter and the electronic load; wherein the loop switching device responds to a control signal from the computer terminal to switch one of the power supply channels of the programmable power supply to be tested to connect to the loop.

Optionally, the loop switching device includes a DC relay, a control signal feedback relay group, a control signal DO module and a switch quantity DI module, the DC relay is connected to the output end of the programmable power supply to be tested, the control signal DO module is connected to the network switch to receive the control signal from the computer terminal and send the control signal to the DC relay, the DC relay responds to the control signal to control one of the power channels of the programmable power supply to be tested to connect to the loop; the control signal feedback relay group is connected to the DC relay to receive the feedback signal of the DC relay, and sends the feedback signal to the network switch through the switch quantity DI module.

Optionally, each power supply channel of the programmable power supply to be tested is connected to the DC relay via a protection diode.

Optionally, the digital multimeter, the electronic load, the sampling resistor, the loop switching device, the computer terminal and the network switch are loop-connected via a control cabinet.

On the other hand, a self-test method for the output characteristics of a programmable power supply for a spacecraft thermal test is also provided. The self-test method is implemented based on the self-test device for the output characteristics of a programmable power supply for a spacecraft thermal test, and comprises the steps of:

Configure test parameters and test processes and generate configuration files;

Controlling the digital multimeter, the electronic load and the loop switching device to initialize relevant variables;

According to the configuration file, a switching operation is performed on the circuit switching device; the switching operation is to sequentially connect the power supply channels corresponding to the programmable power supply to be tested to the circuit;

Controlling the loop to perform a power supply characteristic self-test after being connected to the corresponding power supply channel to obtain characteristic test data;

According to the characteristic test data, the test result of each power supply channel is analyzed and determined.

Optionally, the step of performing a switching operation on the loop switching device according to the configuration file includes:

Determine the execution order of each power supply channel of the programmable power supply to be tested according to the test process of the configuration file;

The circuit switching device is controlled to switch the corresponding target power supply channel to connect to the circuit according to the execution sequence.

Optionally, the step of controlling the loop to perform a power characteristic self-test after connecting to the corresponding power channel, and obtaining characteristic test data includes:

The digital multimeter, the sampling resistor, the electronic load and the target power channel in the loop are controlled to perform a power supply characteristic self-check test based on the test parameters to obtain characteristic test data.

Optionally, the power supply characteristic self-test includes a DC current calibration test, a DC voltage calibration test and a load regulation rate test.

Optionally, after the step of obtaining characteristic test data, the step further includes:

The characteristic test data is converted into a unified data format in real time and the data is archived.

The self-test device and method for the output characteristics of a programmable power supply for a thermal test of a spacecraft described in the present invention include a digital multimeter, an electronic load, a sampling resistor, a loop switching device, a computer terminal and a network switch that form a loop, the digital multimeter being connected in parallel to the sampling resistor to collect first output characteristic information formed on the sampling resistor, and the digital multimeter being connected in parallel to the electronic load via a voltage transmitter to collect second output characteristic information formed on the electronic load, the computer terminal being connected to the network switch signal to receive and send data, and the network switch being connected to the loop switching device, the digital multimeter and the electronic load respectively; wherein the loop switching device responds to a control signal from the computer terminal to switch one of the power supply channels of the programmable power supply to be tested to connect to the loop. A self-check method for the output characteristics of a program-controlled power supply for a spacecraft thermal test is also provided, which generates a configuration file by configuring the test parameters and the test process; controls the digital multimeter, the electronic load and the loop switching device to initialize related variables; performs a switching operation on the loop switching device according to the configuration file; the switching operation is to sequentially connect the power supply channels corresponding to the program-controlled power supply to be tested to the loop; controls the loop to perform a power supply characteristic self-check test after connecting to the corresponding power supply channel to obtain characteristic test data; and analyzes and determines the test results of each power supply channel according to the characteristic test data. Thus, the present invention can realize the automated test of the program-controlled power supply, thereby improving the reliability and accuracy of the test power supply.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a hardware circuit diagram of a self-test device for the output characteristics of a programmable power supply for a spacecraft thermal test provided by an embodiment of the present invention;

FIG2 is a schematic diagram of the internal circuit of the control cabinet of the self-test device for the output characteristics of the programmable power supply for thermal testing of a spacecraft provided by an embodiment of the present invention;

3 is a schematic diagram of the installation of the control cabinet of the self-test device for the output characteristics of the programmable power supply for spacecraft thermal testing provided by an embodiment of the present invention;

FIG4 is a flowchart of the steps of a method for self-testing the output characteristics of a programmable power supply for a spacecraft thermal test provided by an embodiment of the present invention;

FIG5 is an execution flow chart of a specific implementation of the self-test method for the output characteristics of the programmable power supply for spacecraft thermal testing provided by an embodiment of the present invention;

6 is a schematic diagram of the software level division used in the self-check method of the output characteristics of the programmable power supply for spacecraft thermal test provided by an embodiment of the present invention;

FIG. 7 is a flow arrangement configuration diagram of the self-test method for the output characteristics of the programmable power supply for thermal testing of a spacecraft provided in an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

It should be noted that references to "one embodiment", "embodiment", "example embodiment", etc. in this specification refer to the embodiment described may include specific features, structures or characteristics, but not every embodiment must include these specific features, structures or characteristics. In addition, such expressions do not refer to the same embodiment. Further, when describing specific features, structures or characteristics in conjunction with an embodiment, whether or not there is an explicit description, it has been shown that it is within the knowledge of those skilled in the art to combine such features, structures or characteristics into other embodiments.

In addition, certain words are used in the specification and subsequent claims to refer to specific components or parts. Those with ordinary knowledge in the relevant field should understand that manufacturers can use different nouns or terms to refer to the same component or part. This specification and subsequent claims do not use differences in names as a way to distinguish components or parts, but use differences in the functions of components or parts as the criteria for distinction. "Including" and "including" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connected" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

FIG1 shows a self-test device for the output characteristics of a programmable power supply for a thermal test of a spacecraft provided by an embodiment of the present invention, comprising a digital multimeter, an electronic load, a sampling resistor, a loop switching device, a computer terminal and a network switch, wherein the loop switching device, the sampling resistor and the electronic load are connected in series to form a loop, the loop switching device is connected to the output end of the programmable power supply to be tested so as to controllably switch the power supply channel of the programmable power supply to be tested to connect to the loop, the digital multimeter is connected in parallel to the sampling resistor to collect first output characteristic information formed on the sampling resistor, and the digital multimeter is connected in parallel to the electronic load through a voltage inverter to collect second output characteristic information formed on the electronic load, the computer terminal is signal-connected to the network switch for data transmission and reception, and the network switch is respectively connected to the loop switching device, the digital multimeter and the electronic load; wherein the loop switching device responds to a control signal from the computer terminal to switch one of the power supply channels of the programmable power supply to be tested to connect to the loop.

The programmable power supply to be tested is a multi-channel programmable power supply, such as a 15-channel programmable power supply; this embodiment will be described using a 15-channel programmable power supply as the programmable power supply to be tested. Of course, in other examples, other multi-channel programmable power supplies may also be used.

In this embodiment, the power output of one channel of the programmable power supply to be tested is connected to the loop formed by the loop switching device, the sampling resistor and the electronic load in series by controlling the loop switching device, so that the power output of the channel currently selected to be connected flows through the sampling resistor and the electronic load in the loop, and then the corresponding output characteristic information is collected by the digital multimeter connected in parallel to the sampling resistor and the electronic load. That is, the channel of the programmable power supply to be tested is automatically switched to access the test loop by controlling the loop switching device to achieve the effect of automated testing.

In the vacuum heat test, four indicators are mainly involved: current output characteristics, voltage output characteristics, voltage-stabilized output load adjustment rate, and current-stabilized output load adjustment rate. In the specific implementation process of this embodiment, the first output characteristic information of the current output characteristics and the voltage output characteristics can be collected on the sampling resistor through a digital multimeter, and the second output characteristic information of the voltage-stabilized output load adjustment rate and the current-stabilized output load adjustment rate can be collected on the electronic load through a digital multimeter. The data collected by the digital multimeter is uploaded to the computer terminal via a network switch. Among them, the computer terminal of this embodiment is preferably a portable computer.

In an optional embodiment, the circuit switching device includes a DC relay, a control signal feedback relay group, a control signal DO module and a switch quantity DI module, wherein the DC relay is connected to the output end of the program-controlled power supply to be tested, the control signal DO module is connected to the network switch to receive the control signal from the computer terminal and send the control signal to the DC relay, and the DC relay responds to the control signal to control one of the power supply channels of the program-controlled power supply to be tested to be connected to the circuit; the control signal feedback relay group is connected to the DC relay to receive the feedback signal of the DC relay, and sends the feedback signal to the network switch through the switch quantity DI module. After receiving the control signal, the DC relay determines the power supply channel that needs to be connected to the circuit according to the instruction in the control signal, thereby selecting to disconnect the connected channel and connect the channel to be connected to the circuit for testing.

Specifically, the control signal is automatically issued by the computer terminal according to the test logic rules. For example, for the 15 channels of the program-controlled power supply to be tested, the test is performed sequentially from the first channel to the fifteenth channel. After the test of the first channel is completed, the computer terminal generates a control signal (such as the control signal of channel 2). After receiving the control signal, the DC relay disconnects the first channel from the loop and connects the second channel to the loop; that is, the loop switching channel ensures that only one power channel of the program-controlled power supply to be tested is connected to the loop. Furthermore, each power channel of the program-controlled power supply to be tested is connected to the DC relay through a protection diode.

Referring to Figures 2 and 3, preferably, the digital multimeter, electronic load, sampling resistor, loop switching device, computer terminal and network switch of this embodiment are loop-connected through a control cabinet; specifically, the loop connection is performed through a Y2-36ZJLM heating plug led out from the control cabinet.

Based on the same inventive concept, FIG4 shows a self-test method for the output characteristics of a programmable power supply for a thermal test of a spacecraft provided by another embodiment of the present invention. The self-test method is implemented based on the self-test device for the output characteristics of a programmable power supply for a thermal test of a spacecraft provided in the above embodiment. Specifically, the various hardware devices of the self-test device are driven by software to perform corresponding functions to complete the self-test work. The hierarchical division of the software part is shown in FIG6 , wherein the front-end view layer is responsible for form layout and data display, and cooperates with the view model to realize the back-end data drive; the middle service layer is responsible for business logic processing, and calls each device driver to complete the test process; the bottom data layer includes a data model and a data processing part, which are responsible for data transmission, warehousing, query and other data-related operations; the entire software system cooperates with relevant class libraries such as Excel data processing and MVVM support framework to jointly build a complete power self-test test system.

The self-test method comprises the following steps:

S101: Configure test parameters and test process, and generate a configuration file.

In the vacuum thermal test, four indicators are mainly involved: current output characteristics, voltage output characteristics, voltage-regulated output load adjustment rate, and current-regulated output load adjustment rate. For these four indicators, a flexible test process arrangement method is needed to meet the actual test conditions. In order to meet the test's variable and flexible power supply test requirements, the test parameters and test processes need to be configured in advance. This embodiment preferably uses a process configuration method based on a configuration table to generate a configuration file, see the process arrangement configuration shown in Figure 7, where, taking the voltage output characteristic test process as an example, the current and voltage of the power supply under test can be set in turn, the resistance value of the electronic load can be set, and the upper and lower limits of the real value and the upper and lower limits of the readback value can be set for data judgment.

S102: Control the digital multimeter, electronic load and loop switching device to initialize related variables, specifically, by assigning values to related variables to complete the self-checking of the digital multimeter, electronic load and loop switching device.

S103: executing a switching operation on the circuit switching device according to the configuration file; the switching operation is to sequentially connect the power supply channels corresponding to the programmable power supply to be tested to the circuit.

In an optional implementation, step S103 includes: determining the execution order of each power channel of the programmable power supply to be tested according to the test process of the configuration file; and controlling the loop switching device to switch the corresponding target power channel to connect to the loop according to the execution order.

S104: Control the loop to perform a power characteristic self-test after being connected to the corresponding power channel to obtain characteristic test data.

In specific implementation, step S104 includes: controlling the digital multimeter, sampling resistor, electronic load and target power channel in the loop to perform a power characteristic self-test based on the test parameters to obtain characteristic test data. The power characteristic self-test includes a DC current calibration test, a DC voltage calibration test and a load regulation test.

Optionally, after step S104, the method further includes: converting the characteristic test data into a unified data format in real time, and archiving the data.

S105: Analyze and determine the test results of each power channel according to the characteristic test data. In step S105, data calculation, processing and interpretation operations can be performed according to the collected characteristic test data to complete the test process of each power channel.

Figure 5 shows a specific implementation process of the self-test method of the output characteristics of the programmable power supply for the thermal test of the spacecraft. The process is specifically implemented based on the software configured for the self-test device of the output characteristics of the programmable power supply for the thermal test of the spacecraft. When the software is started, the relevant variables are assigned values first to complete the self-test of the meter, the electronic load and the loop switching device; the channel is switched by the loop switching device to perform a self-test test of the power supply characteristics of the channel. During the test, each device performs current, voltage and load regulation rate output characteristic tests in turn according to the configuration file; after the test, the real-time data is processed into a unified data format and the data is archived immediately; after all tests on the current channel are completed, the power output of the channel is turned off, the relay is driven to switch the test channel, and the next channel test is performed until all channels are tested; after each channel test, the data of this test is calculated, processed and interpreted to complete a single test; after all channels are tested, the test ends.

In summary, the self-test device and self-test method for the output characteristics of a programmable power supply for a thermal test of a spacecraft described in the present invention include a digital multimeter, an electronic load, a sampling resistor, a loop switching device, a computer terminal and a network switch that form a loop, the digital multimeter is connected in parallel to the sampling resistor to collect first output characteristic information formed on the sampling resistor, and the digital multimeter is connected in parallel to the electronic load through a voltage transmitter to collect second output characteristic information formed on the electronic load, the computer terminal is connected to the network switch signal for data transmission and reception, and the network switch is respectively connected to the loop switching device, the digital multimeter and the electronic load; wherein the loop switching device responds to a control signal from the computer terminal to switch one of the power channels of the programmable power supply to be tested to connect to the loop. A self-check method for the output characteristics of a program-controlled power supply for a spacecraft thermal test is also provided, which generates a configuration file by configuring the test parameters and the test process; controls the digital multimeter, the electronic load and the loop switching device to initialize the relevant variables; performs a switching operation on the loop switching device according to the configuration file; the switching operation is to sequentially connect the power supply channels corresponding to the program-controlled power supply to be tested to the loop; controls the loop to perform a power supply characteristic self-check test after connecting to the corresponding power supply channel to obtain characteristic test data; and analyzes and determines the test results of each power supply channel according to the characteristic test data. Thus, the present invention can realize the automated test of the program-controlled power supply, thereby improving the reliability and accuracy of the test power supply.

Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims (9)

1. A self-test device for the output characteristics of a programmable power supply for a spacecraft thermal test, characterized in that it comprises a digital multimeter, an electronic load, a sampling resistor, a loop switching device, a computer terminal and a network switch, wherein the loop switching device, the sampling resistor and the electronic load are connected in series to form a loop, the loop switching device is connected to the output end of the programmable power supply to be tested so as to controllably switch the power supply channel of the programmable power supply to be tested to access the loop, the digital multimeter is connected in parallel to the sampling resistor to collect first output characteristic information formed on the sampling resistor, and the digital multimeter is connected in parallel to the electronic load through a voltage transmitter to collect second output characteristic information formed on the electronic load, the computer terminal is signal-connected to the network switch for data transmission and reception, and the network switch is respectively connected to the loop switching device, the digital multimeter and the electronic load; wherein the loop switching device responds to a control signal from the computer terminal to switch one of the power supply channels of the programmable power supply to be tested to access the loop. 2. According to claim 1, the self-test device for the output characteristics of the programmable power supply for thermal testing of spacecraft is characterized in that the circuit switching device includes a DC relay, a control signal feedback relay group, a control signal DO module and a switch quantity DI module, the DC relay is connected to the output end of the programmable power supply to be tested, the control signal DO module is connected to the network switch to receive the control signal from the computer terminal and send the control signal to the DC relay, the DC relay responds to the control signal to control one of the power channels of the programmable power supply to be tested to connect to the circuit; the control signal feedback relay group is connected to the DC relay to receive the feedback signal of the DC relay, and sends the feedback signal to the network switch through the switch quantity DI module. 3. The self-test device for the output characteristics of a programmable power supply for a spacecraft thermal test according to claim 2 is characterized in that each power supply channel of the programmable power supply to be tested is connected to the DC relay via a protection diode. 4. The self-test device for the output characteristics of a programmable power supply for a spacecraft thermal test according to claim 1 is characterized in that the digital multimeter, the electronic load, the sampling resistor, the loop switching device, the computer terminal and the network switch are loop-connected through a control cabinet. 5. A self-test method for the output characteristics of a program-controlled power supply for a spacecraft thermal test, characterized in that the self-test method is implemented based on the self-test device for the output characteristics of a program-controlled power supply for a spacecraft thermal test according to any one of claims 1 to 4, comprising the steps of: Configure test parameters and test processes and generate configuration files; Controlling the digital multimeter, the electronic load and the loop switching device to initialize relevant variables; According to the configuration file, a switching operation is performed on the circuit switching device; the switching operation is to sequentially connect the power supply channels corresponding to the programmable power supply to be tested to the circuit; Controlling the loop to perform a power supply characteristic self-test after being connected to the corresponding power supply channel to obtain characteristic test data; According to the characteristic test data, the test result of each power supply channel is analyzed and determined. 6. The self-test method for the output characteristics of a programmable power supply for a spacecraft thermal test according to claim 5, wherein the step of performing a switching operation on the circuit switching device according to the configuration file comprises: Determine the execution order of each power supply channel of the programmable power supply to be tested according to the test process of the configuration file; The circuit switching device is controlled to switch the corresponding target power supply channel to connect to the circuit according to the execution sequence. 7. The method for self-testing the output characteristics of a program-controlled power supply for a spacecraft thermal test according to claim 6, wherein the step of controlling the loop to perform a power supply characteristic self-test after accessing the corresponding power supply channel, and obtaining characteristic test data comprises: The digital multimeter, the sampling resistor, the electronic load and the target power channel in the loop are controlled to perform a power supply characteristic self-check test based on the test parameters to obtain characteristic test data. 8. The self-test method for the output characteristics of a programmable power supply for a spacecraft thermal test according to claim 7, wherein the power supply characteristics self-test test includes a DC current calibration test, a DC voltage calibration test, and a load regulation rate test. 9. The method for self-testing the output characteristics of a programmable power supply for a spacecraft thermal test according to claim 5, characterized in that after the step of obtaining the characteristic test data, it further comprises: The characteristic test data is converted into a unified data format in real time and the data is archived.