Three-temperature test system of Stirling cryocooler motor driver board

Abstract

The utility model relates to the technical field of semiconductor device testing, in particular to a three-temperature testing system for a Stirling cryocooler motor driving board, and the system comprises an incubator which is provided with an internal space with adjustable temperature; the Stirling cryocooler is contained in the inner space and provided with a temperature measuring diode, and the temperature measuring diode is configured to detect the current refrigeration temperature of the Stirling cryocooler; the motor driving board is contained in the inner space to control operation of the Stirling cryocooler, and the motor driving board is provided with a temperature measuring circuit connected to the temperature measuring diode; the direct-current power supply provides working voltage for the motor driving board; the voltage acquisition unit is used for acquiring measurement voltage at the two ends of the temperature measurement diode through the temperature measurement circuit; and the control device is respectively connected to the incubator, the direct-current power supply and the voltage acquisition unit, and is configured to control the temperature of the internal space, control the working voltage provided by the direct-current power supply to the motor driving board, and acquire the measurement voltage at the two ends of the temperature measurement diode from the voltage acquisition unit.

Description

Technical Field

[0001] The present application relates to the technical field of semiconductor device testing, and in particular to a three-temperature testing system for a Stirling refrigerator motor drive board. Background Art

[0002] Three-temperature performance testing is an essential step before the motor driver board for Stirling refrigerators is shipped. Currently, the market mostly uses manual testing to meet performance testing needs, which not only has low work efficiency but also high labor intensity. Summary of the invention

[0003] In view of this, the present application proposes a three-temperature test system for a Stirling refrigerator motor drive board to improve the test efficiency of product performance.

[0004] A three-temperature test system for a Stirling refrigerator motor drive board, comprising:

[0005] A thermostat having an interior space with adjustable temperature;

[0006] A Stirling refrigerator is accommodated in the internal space and has a temperature measuring diode, wherein the temperature measuring diode is configured to detect a current cooling temperature of the Stirling refrigerator;

[0007] a motor drive board, which is received in the internal space and connected to the Stirling refrigerator to control the operation of the Stirling refrigerator, the motor drive board having a temperature measuring circuit connected to the temperature measuring diode;

[0008] A DC power supply connected to the motor drive board to provide a working voltage to the motor drive board;

[0009] A voltage acquisition unit connected to the temperature measurement circuit of the motor drive board to obtain the measurement voltage across the temperature measurement diode via the temperature measurement circuit;

[0010] A control device is respectively connected to the temperature box, the DC power supply and the voltage acquisition unit, and is configured to: control the temperature of the internal space, control the working voltage provided by the DC power supply to the motor drive board, and obtain the measurement voltage across the temperature measuring diode from the voltage acquisition unit.

[0011] In some possible implementations, the control device is connected to the motor drive board and is configured to adjust driving parameters of the motor drive board.

[0012] In some possible embodiments, the control device is configured to compare the measured voltage across the temperature measuring diode obtained from the voltage acquisition unit with a target voltage, and adjust the drive parameters of the motor drive board based on the comparison result, wherein the target voltage corresponds to the target cooling temperature of the Stirling refrigerator.

[0013] In some possible implementations, the control device is configured to compare the measured voltage across the temperature measuring diode obtained from the voltage acquisition unit with the target voltage, and determine the refrigeration performance of the Stirling refrigerator based on the comparison result.

[0014] In some possible implementations, the control device is configured to: control the current output by the DC power supply.

[0015] In some possible implementations, the control device is a PC.

[0016] In some possible implementations, the voltage acquisition unit is a digital multimeter.

[0017] In some possible implementations, the control device is connected to the digital multimeter via a network cable.

[0018] In some possible implementations, the control device is connected to the incubator via an RS232 serial port, and is connected to the DC power supply via a GPIB bus.

[0019] In some possible implementations, the DC power supply, the voltage acquisition unit, and the control device are all disposed outside the temperature box.

[0020] According to the three-temperature test system for the motor drive board of the Stirling refrigerator provided in the present application, the three-temperature test can be automatically performed on the motor drive board of the Stirling refrigerator, reducing manual operations and effectively improving the efficiency of product performance testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0022] Figure 1 It is a structural schematic diagram of a three-temperature test system for a Stirling refrigerator motor drive board provided in one embodiment of the present application.

[0023] Figure 2 It is a structural schematic diagram of a three-temperature test system for a Stirling refrigerator motor drive board provided in another embodiment of the present application.

[0024] Description of reference numerals:

[0025] 1-control device, 2-temperature box, 2A-inner space, 3-motor drive board, 3A-temperature measurement circuit, 4-Stirling refrigerator, 4A-temperature measurement diode, 5-DC power supply, 6-voltage acquisition unit. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described below in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application. It can be understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0027] In the description of this application, if there are terms such as "first", "second", etc., they are only used to distinguish the objects described and do not have any order or technical meaning. Therefore, an object defined as "first", "second", etc. may explicitly or implicitly include one or more of the objects. In addition, "one" or "a" and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one, and "multiple" means no less than two.

[0028] In the description of this specification, reference to "one embodiment" or "some embodiments" etc. means that one or more embodiments of the present application include a specific feature, structure or characteristic described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0029] Figure 1 A three-temperature test system for a Stirling refrigerator motor drive board provided in an embodiment of the present application (hereinafter sometimes referred to as "the system") is shown, which mainly includes a temperature box 2, a Stirling refrigerator 4, a motor drive board 3, a DC power supply 5, a voltage acquisition unit 6 and a control device 1.

[0030] The thermostat 2 has an internal space 2A whose temperature can be adjusted, and can stabilize the temperature of the internal space 2A at various desired values, such as high temperature, medium temperature, and low temperature.

[0031] The Stirling refrigerator 4 is accommodated in the internal space 2A of the temperature box 2, so that the Stirling refrigerator 4 is tested in a stable temperature environment. The Stirling refrigerator 4 has a temperature measuring diode 4A, which can be thermally coupled to the cold output part (or cold supply part) of the Stirling refrigerator 4, so as to detect the current cooling temperature of the Stirling refrigerator 4 (more specifically, the cold output part). It is well known that the temperature measuring diode 4A has different electrical characteristics at different temperatures. For example, when the current flowing through the temperature measuring diode 4A remains unchanged, if the temperature of the temperature measuring diode 4A changes, the voltage across the temperature measuring diode 4A will change accordingly. In this way, the temperature value of the environment in which the temperature measuring diode 4A is currently located can be determined by detecting the voltage value across the temperature measuring diode 4A.

[0032] The motor drive board 3 is also received in the internal space 2A of the temperature box 2, and the motor drive board 3 is connected to the Stirling refrigerator 4, more specifically, the motor of the Stirling refrigerator 4, to control the operation of the Stirling refrigerator 4. In addition, the motor drive board 3 has a temperature measuring circuit 3A connected to the temperature measuring diode 4A. Exemplarily, the temperature measuring circuit 3A can be a voltage amplifier circuit, which can amplify the voltage across the temperature measuring diode 4A by a set multiple.

[0033] The voltage acquisition unit 6 is connected to the temperature measurement circuit 3A of the motor drive board 3 to obtain the measured voltage across the temperature measurement diode 4A via the temperature measurement circuit 3A. In some embodiments, the voltage acquisition unit 6 may be a digital multimeter.

[0034] The DC power supply 5 is connected to the motor driving board 3 to provide an operating voltage to the motor driving board 3. The motor driving board 3 controls the operation of the Stirling refrigerator 4 based on the operating voltage provided by the DC power supply 5.

[0035] The control device 1 may be a PC (Personal Computer), which is respectively connected to the temperature box 2, the DC power supply 5 and the voltage acquisition unit 6, and the control device 1 is configured to: control the temperature of the internal space 2A of the temperature box 2, control the working voltage provided by the DC power supply 5 to the motor drive board 3, and obtain the measured voltage across the temperature measuring diode 4A from the voltage acquisition unit 6. In addition, the DC power supply 5, the voltage acquisition unit 6 and the control device 1 are all configured outside the temperature box 2.

[0036] During operation, the control device 1 controls the temperature box 2 to adjust the temperature of its internal space 2A to a specified value, and controls the DC power supply 5 to provide a specified voltage to the motor drive board 3. The motor drive board 3 allows the Stirling refrigerator 4 to operate at a corresponding power to cool, thereby gradually reducing the temperature of the temperature environment in which the temperature measuring diode 4A is located (the temperature environment is provided by the refrigeration part or cold output part of the Stirling refrigerator 4), causing the temperature of the temperature measuring diode 4A to gradually decrease. After a period of time, the refrigeration temperature of the Stirling refrigerator 4 and the temperature of the temperature measuring diode 4A itself stabilize, and the voltage acquisition unit 6 obtains a relatively stable measurement voltage at both ends of the temperature measuring diode 4A via the temperature measuring circuit 3A on the motor drive board 3, and transmits the measurement voltage to the control device 1 in real time. The control device 1 can determine the current actual refrigeration temperature of the Stirling refrigerator 4 by the magnitude of the measured voltage. If the actual refrigeration temperature determined by the control device 1 is significantly different from the ideal temperature, it indicates that the electrical performance of the motor drive board 3 is poor. For example, the control device 1 can compare the measured voltage at both ends of the temperature measuring diode 4A obtained from the voltage acquisition unit 6 with the target voltage, and judge the electrical performance of the motor drive board 3 based on the comparison result. The target voltage corresponds to the target refrigeration temperature of the Stirling refrigerator 4. In addition, the control device 1 can also judge the electrical control stability of the motor drive board 3 by the stability of the measured voltage. If the measured voltage fluctuates within a large range, it indicates that the electrical control stability of the motor drive board 3 is poor. And thereafter, the control device 1 can also control the temperature box 2 to adjust the temperature of its internal space 2A to another specified value, and control the DC power supply 5 to provide a voltage of a first specified magnitude to the motor drive board 3 to test the electrical performance of the motor drive board 3 at the other temperature and another refrigeration power.

[0037] In some embodiments, the PC as the control device 1 is connected to the digital multimeter as the voltage acquisition unit 6 via a network cable, connected to the DC power supply 5 via a GPIB bus, and connected to the temperature box 2 via an RS232 serial port.

[0038] Next, see Figure 2 , Figure 2 A three-temperature test system for a Stirling refrigerator motor drive board provided by another embodiment of the present application is shown. In this embodiment, the control device 1 is also directly connected to the motor drive board 3 without passing through the voltage acquisition unit 6, and is configured to adjust the drive parameters of the motor drive board 3. Specifically, the control device 1 compares the measured voltage across the temperature measuring diode 4A obtained from the voltage acquisition unit 6 with the target voltage. If the comparison result shows that the current actual refrigeration temperature of the Stirling refrigerator 4 is much different from the ideal temperature, the drive parameters of the motor drive board 3 are adjusted to narrow the gap and improve the electrical performance of the motor drive board 3.

[0039] It should be noted that the above-mentioned three-temperature test system provided in each embodiment of the present application, each module of which can work in combination with software in the prior art. For example, the technology of simply using the control device 1 to control the temperature box 2 and the DC power supply 5, the technology of simply obtaining the measured voltage from the voltage acquisition unit 6, and the technology of simply adjusting the driving parameters of the motor drive board 3 through the control device 1 are all prior art. Therefore, the present application does not involve software improvements.

Claims

1. A three-temperature test system for a Stirling refrigerator motor drive board, characterized in that: include: A thermostat having an interior space with adjustable temperature; A Stirling refrigerator is accommodated in the internal space and has a temperature measuring diode, wherein the temperature measuring diode is configured to detect a current cooling temperature of the Stirling refrigerator; a motor drive board, which is received in the internal space and connected to the Stirling refrigerator to control the operation of the Stirling refrigerator, the motor drive board having a temperature measuring circuit connected to the temperature measuring diode; A DC power supply connected to the motor drive board to provide a working voltage to the motor drive board; A voltage acquisition unit connected to the temperature measurement circuit of the motor drive board to obtain the measurement voltage across the temperature measurement diode via the temperature measurement circuit; A control device is respectively connected to the temperature box, the DC power supply and the voltage acquisition unit, and is configured to: control the temperature of the internal space, control the working voltage provided by the DC power supply to the motor drive board, and obtain the measurement voltage across the temperature measuring diode from the voltage acquisition unit.

2. The system according to claim 1, characterized in that The control device is connected to the motor driving board and is configured to adjust driving parameters of the motor driving board.

3. The system according to claim 2, characterized in that The control device is configured to compare the measured voltage across the temperature measuring diode obtained from the voltage acquisition unit with a target voltage, and adjust the driving parameters of the motor drive board based on the comparison result, wherein the target voltage corresponds to a target cooling temperature of the Stirling refrigerator.

4. The system according to claim 1, characterized in that The control device is configured to compare the measured voltage across the temperature measuring diode obtained from the voltage acquisition unit with the target voltage, and determine the electrical performance of the motor drive board based on the comparison result.

5. The system according to claim 1, characterized in that The control device is configured to control the current output by the DC power supply.

6. The system according to claim 1, characterized in that The control device is a PC.

7. The system according to claim 1, characterized in that The voltage acquisition unit is a digital multimeter.

8. The system according to claim 7, characterized in that The control device is connected to the digital multimeter via a network cable.

9. The system according to claim 1, characterized in that The control device is connected to the temperature box via an RS232 serial port, and is connected to the DC power supply via a GPIB bus.

10. The system according to claim 1, characterized in that The DC power supply, the voltage acquisition unit and the control device are all arranged outside the temperature box.

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