Control system of solar simulator

Abstract

The invention provides a control system of a solar simulator. The control system comprises a power supply driving module, a monitoring module and a control module, wherein the power supply driving module comprises an analog quantity power supply driving unit and an Ethernet power supply driving unit, and the monitoring module comprises an irradiance monitoring unit; the analog quantity power supply driving unit is used for connecting a power supply analog quantity port of the solar simulator and outputting voltage and current to the power supply analog quantity port; the Ethernet power supply driving unit is used for being connected with a power supply Ethernet port of the solar simulator and outputting voltage and current to the power supply Ethernet port when the analog quantity power supply driving unit breaks down; the irradiance monitoring unit is used for monitoring the irradiation intensity of the solar simulator; and the control module is used for determining a control mode of the solar simulator based on the irradiation intensity and controlling the power supply driving module to output voltage and current to the solar simulator based on the control mode so as to control the irradiation intensity of the solar simulator, and high precision and reliability of the irradiation intensity emitted by the solar simulator can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of spacecraft thermal testing, and in particular to a control system of a solar simulator. Background Art

[0002] At present, in order to ensure that satellites or other spacecraft can work normally in space, it is necessary to simulate the environment in space in ground laboratories, among which sunlight is an important simulation factor. Generally, sunlight can be simulated by solar simulators. Solar simulators are controllable radiation sources that can provide a spectrum distribution similar to that of real sunlight, which can meet the needs of thermal vacuum tests of spacecraft.

[0003] Solar simulation thermal test technology is an important bridge connecting theoretical research with practical applications and ensuring the reliability of spacecraft and solar energy equipment. By simulating the solar radiation environment through a solar simulator, the performance of the above-mentioned equipment in the actual space environment can be better evaluated and improved. However, the existing methods of controlling the irradiation intensity of the solar simulator are relatively simple. For example, the irradiation intensity of the solar simulator is only controlled according to the set power, or only a single driving power supply is used to power the solar simulator. The above-mentioned scheme for controlling the solar simulator easily leads to the irradiation intensity of the solar simulator being not accurate and reliable enough. Summary of the invention

[0004] The invention provides a control system of a solar simulator, which is used to solve the technical problem in the prior art that the radiation intensity of the solar simulator cannot be accurately and reliably controlled.

[0005] In one aspect, the present invention provides a control system for a solar simulator, comprising a power drive module, a monitoring module and a control module; wherein the power drive module comprises an analog power drive unit and an Ethernet power drive unit, and the monitoring module comprises an irradiance monitoring unit;

[0006] The analog power driving unit is used to connect to the power analog port of the solar simulator and output voltage and current to the power analog port;

[0007] The Ethernet power drive unit is used to connect to the power Ethernet port of the solar simulator, and output voltage and current to the power Ethernet port when the analog power drive unit fails;

[0008] The irradiance monitoring unit is used to monitor the irradiance intensity of the solar simulator;

[0009] The control module is used to determine the control mode of the solar simulator based on the irradiation intensity, and control the power drive module to output voltage and current to the solar simulator based on the control mode to control the irradiation intensity of the solar simulator.

[0010] According to a control system of a solar simulator provided by the present invention, the control module is also used to determine whether the irradiation intensity falls within a preset standard intensity range;

[0011] If yes, determining that the control mode of the solar simulator is a closed-loop control mode;

[0012] The power driving module is controlled to output voltage and current to the solar simulator based on the closed-loop control mode.

[0013] According to a control system of a solar simulator provided by the present invention, the method of controlling the power drive module to output voltage and current to the solar simulator based on the closed-loop control mode includes:

[0014] Comparing the irradiation intensity with a preset intensity threshold, wherein the preset intensity threshold belongs to the preset standard intensity range;

[0015] When the radiation intensity is less than the preset intensity threshold, increasing the output voltage or current of the power driving module;

[0016] When the radiation intensity is greater than the preset intensity threshold, the output voltage or current of the power driving module is reduced.

[0017] According to a control system of a solar simulator provided by the present invention, the control module is also used to adjust the light irradiation angle of the light-emitting device in the solar simulator when the irradiation intensity is greater than the preset intensity threshold, so as to reduce the irradiation intensity of the current irradiated area.

[0018] According to a control system of a solar simulator provided by the present invention, the control module is further used to determine that the control mode of the solar simulator is an open-loop control mode if the irradiation intensity does not fall within a preset standard intensity range;

[0019] The power driving module is controlled to output voltage and current to the solar simulator based on the open-loop control mode.

[0020] According to a control system of a solar simulator provided by the present invention, the control of the power drive module to output voltage and current to the solar simulator based on the open-loop control mode includes:

[0021] Obtaining a pre-established calibration relationship between the irradiance intensity and the output power of the light emitting device power supply in the solar simulator, as well as a target irradiance intensity;

[0022] Matching the target irradiation intensity with the irradiation intensity in the calibration relationship, and determining the output power of the light emitting device power supply corresponding to the irradiation intensity in the calibration relationship that is the same as the target irradiation intensity;

[0023] The power driver module is controlled to output voltage and current to the solar simulator based on the determined output power of the light emitting device power supply.

[0024] According to a control system of a solar simulator provided by the present invention, the monitoring module further comprises a current monitoring unit and a voltage monitoring unit;

[0025] The current monitoring unit is used to obtain current at the current output port of the analog power drive unit; or to obtain current at the Ethernet power drive unit;

[0026] The voltage monitoring unit is used to obtain voltage at the voltage output port of the analog power drive unit; or to obtain voltage at the Ethernet power drive unit.

[0027] According to a control system of a solar simulator provided by the present invention, the monitoring module further comprises a power monitoring unit;

[0028] The power monitoring unit is used to obtain the current in the current monitoring unit and the voltage in the voltage monitoring unit, and determine the power of the light-emitting device in the solar simulator based on the obtained voltage and current.

[0029] According to a control system of a solar simulator provided by the present invention, the control module is further used to compare the power monitored by the power monitoring unit with the set power of the light-emitting device;

[0030] When the power monitored by the power monitoring unit is less than the set power, increasing the output voltage or current of the power driving module;

[0031] When the power monitored by the power monitoring unit is greater than the set power, the output voltage or current of the power driving module is reduced.

[0032] According to a control system of a solar simulator provided by the present invention, the light emitting device is a xenon lamp.

[0033] The control system of the solar simulator provided by the present invention comprises an analog power supply driving unit for connecting to the power supply analog port of the solar simulator, outputting voltage and current to the power supply analog port, and realizing high-precision control of the output voltage or current. The Ethernet power supply driving unit is used to connect to the power supply Ethernet port of the solar simulator, and when the analog power supply driving unit fails, the voltage and current are output to the power supply Ethernet port, and the analog power supply driving unit and the analog power supply driving unit serve as backup for each other, and when one fails, the other can be switched to ensure the stable operation of the control system. The control module is used to determine the control mode of the solar simulator based on the irradiation intensity, and control the power supply driving module to output voltage and current to the solar simulator based on the control mode, and can ensure the high precision and reliability of the irradiation intensity emitted by the solar simulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is one of the structural schematic diagrams of the control system of the solar simulator provided by the embodiment of the present invention;

[0036] Figure 2 This is the second structural schematic diagram of the control system of the solar simulator provided in the embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Figure 1 It is one of the structural schematic diagrams of the control system of the solar simulator provided by the embodiment of the present invention; Figure 2 FIG2 is a second structural diagram of a control system of a solar simulator provided by an embodiment of the present invention. Figure 1 and Figure 2 The control system 20 of the solar simulator may include a power drive module 202, a monitoring module 203 and a control module 204. The power drive module 202 may include an analog power drive unit 205 and an Ethernet power drive unit 206, and the monitoring module 203 may include an irradiance monitoring unit 207.

[0039] The analog power drive unit 205 is used to connect to the power analog port of the solar simulator and output voltage and current to the power analog port. The analog power drive unit 205 is a device that uses analog signals to control power output. It can adjust the output voltage or current according to the input analog signal changes. The analog control can achieve high-precision control of the output voltage or current.

[0040] The Ethernet power drive unit 206 is used to connect the power Ethernet port of the solar simulator, and outputs voltage and current to the power Ethernet port when the analog power drive unit 205 fails. A power control instruction (such as a voltage control instruction, a current control instruction) can be sent by a computer to drive the Ethernet power drive unit 206 to output voltage and current. The Ethernet power drive unit 206 can output voltage and current to the power Ethernet port of the solar simulator through communication protocols such as TCP / IP and SCPI. SCPI is a standard instruction set for programmable instruments, which is used to control and query instrument status, is mainly used in test and measurement equipment, and communicates through ASCII code strings. TCP / IP is the basic protocol of the Internet, which is used for communication between different network devices, including transmission control protocol (TCP) and Internet protocol (IP), which are responsible for data transmission and addressing respectively. The Ethernet power drive unit 206 and the analog power drive unit 205 are backups for each other. When one of them fails, it can be switched to the other to ensure the stable operation of the control system.

[0041] The irradiance monitoring unit 207 is used to monitor the irradiance intensity of the solar simulator. The irradiance monitoring unit 207 can be set in front of the solar simulator so that the light emitted by the solar simulator directly irradiates the irradiance monitoring unit 207. Direct irradiation can be understood as vertical irradiation, that is, when the light irradiates the irradiance monitoring unit 207, the light is perpendicular to the receiving surface of the irradiance monitoring unit 207. For example, setting it in front of the quasi-diameter of the solar simulator can ensure that the monitored irradiance intensity is more accurate.

[0042] The control module 204 is used to determine the control mode of the solar simulator based on the irradiation intensity, and control the power driving module 202 to output voltage and current to the solar simulator based on the control mode to control the irradiation intensity of the solar simulator.

[0043] In this embodiment, the analog power drive unit 205 is used to connect to the power analog port of the solar simulator, output voltage and current to the power analog port, and achieve high-precision control of the output voltage or current. The Ethernet power drive unit 206 is used to connect to the power Ethernet port of the solar simulator. When the analog power drive unit 205 fails, the voltage and current are output to the power Ethernet port, and the analog power drive unit 205 is backed up by each other. When one of them fails, it can be switched to the other to ensure the stable operation of the control system 20. The control module 204 is used to determine the control mode of the solar simulator based on the irradiation intensity, and control the power drive module 202 to output voltage and current to the solar simulator based on the control mode, which can ensure the high accuracy and reliability of the irradiation intensity emitted by the solar simulator.

[0044] In one embodiment of the present specification, the control module 204 is also used to determine whether the irradiation intensity falls within a preset standard intensity range;

[0045] If yes, then the control mode of the solar simulator is determined to be a closed-loop control mode;

[0046] The power driving module 202 is controlled to output voltage and current to the solar simulator based on a closed-loop control mode.

[0047] In this embodiment, the preset standard intensity range represents the maximum normal value and the minimum normal value of the irradiance intensity emitted by the solar simulator and the value therebetween. The preset standard intensity range can be determined according to the parameters of the light-emitting device of the solar simulator, and the parameters may include model, rated voltage, rated current, power, service life, etc. When the irradiance intensity belongs to the preset standard intensity range, the monitoring data representing the irradiance intensity is in a normal state. Therefore, when the irradiance intensity belongs to the preset standard intensity range, the output voltage and current of the power driver module 202 to the solar simulator are controlled based on the closed-loop control mode, so that the reliability of the output voltage and current of the power driver module 202 can be ensured. The closed-loop control mode is to achieve high-precision control of the solar simulator and enhance the anti-interference ability through negative feedback, and to adjust according to the deviation between the output of the solar simulator and the expected value (preset intensity threshold), so as to achieve more precise control accuracy.

[0048] In one embodiment of the present specification, controlling the power driver module 202 to output voltage and current to the solar simulator based on a closed-loop control mode may include:

[0049] Comparing the irradiation intensity with a preset intensity threshold, wherein the preset intensity threshold belongs to a preset standard intensity range;

[0050] When the radiation intensity is less than the preset intensity threshold, increasing the output voltage or current of the power driving module 202;

[0051] When the radiation intensity is greater than the preset intensity threshold, the output voltage or current of the power driving module 202 is reduced.

[0052] In this embodiment, the preset intensity threshold can be set according to actual conditions and is not specifically limited here. When the irradiation intensity is less than the preset intensity threshold, the output voltage or current of the power drive module 202 is increased, and when the irradiation intensity is greater than the preset intensity threshold, the output voltage or current of the power drive module 202 is reduced, thereby realizing the control of the solar simulator according to the irradiation intensity, ensuring that the irradiation intensity generated by the solar simulator is within the required range, and realizing precise control of the irradiation intensity.

[0053] In one embodiment of the present specification, the control module 204 is further configured to adjust the light irradiation angle of the light emitting device in the solar simulator to reduce the irradiation intensity of the current irradiated area when the irradiation intensity is greater than a preset intensity threshold.

[0054] In this embodiment, the light irradiation angle of the light emitting device in the solar simulator is adjusted, that is, the angle of the light emitting device in the solar simulator is adjusted. By adjusting the light irradiation angle of the light emitting device in the solar simulator, the light can be deviated from the current irradiated area, thereby reducing the irradiation intensity of the current irradiated area. This method avoids adjusting the voltage and current, and is very simple and convenient.

[0055] In one embodiment of the present specification, the control module 204 is further configured to determine that the control mode of the solar simulator is an open-loop control mode if the irradiation intensity does not fall within a preset standard intensity range;

[0056] The power driving module 202 is controlled based on the open loop control mode to output voltage and current to the solar simulator.

[0057] In this embodiment, if the irradiation intensity does not fall within the preset standard intensity range, it means that the monitored irradiation intensity is in an abnormal state. When the irradiation intensity is in an abnormal state, the irradiation intensity cannot be used as a reference standard. Therefore, if the irradiation intensity does not fall within the preset standard intensity range, the control mode of the solar simulator is determined to be an open-loop control mode. The open-loop control mode means that there is only a sequential action but no reverse connection between the control module 204 and the controlled object solar simulator, that is, the solar simulator can be directly controlled according to the set parameters without considering the feedback of the solar simulator. This control method is very simple, stable and reliable.

[0058] In one embodiment of the present specification, controlling the power driver module 202 to output voltage and current to the solar simulator based on an open-loop control mode may include:

[0059] Obtaining a pre-established calibration relationship between irradiance intensity and output power of a light emitting device power supply in a solar simulator, as well as a target irradiance intensity;

[0060] Matching the target irradiance intensity with the irradiance intensity in the calibration relationship, and determining the output power of the light emitting device power supply corresponding to the irradiance intensity in the calibration relationship that is the same as the target irradiance intensity;

[0061] The power driver module 202 is controlled to output voltage and current to the solar simulator based on the determined output power of the light emitting device power supply.

[0062] In this embodiment, the calibration relationship between the irradiation intensity and the output power of the light-emitting device power supply in the solar simulator is the corresponding relationship between the irradiation intensity and the output power of the light-emitting device power supply. For example, output power 1 corresponds to irradiation intensity 1, output power 2 corresponds to irradiation intensity 2, output power 3 corresponds to irradiation intensity 3, and so on.

[0063] The target irradiance intensity is the actual irradiance intensity required when simulating sunlight. The target irradiance intensity is matched with the irradiance intensity in the calibration relationship, and the power output power of the light-emitting device corresponding to the irradiance intensity that is the same as the target irradiance intensity in the calibration relationship is determined, that is, the power output power that can meet the required actual irradiance intensity is obtained, and then the corresponding voltage and current are obtained according to the power output power, so as to control the power drive module 202 to output the voltage and current to the solar simulator, so as to achieve precise control of the irradiance intensity.

[0064] In an embodiment of the present specification, the monitoring module 203 may further include a current monitoring unit 208 and a voltage monitoring unit 209 .

[0065] The current monitoring unit 208 is used to obtain the current from the current output port of the analog power drive unit 205; or, to obtain the current from the Ethernet power drive unit 206;

[0066] The voltage monitoring unit 209 is used to obtain the voltage at the voltage output port of the analog power driving unit 205 ; or, to obtain the voltage at the Ethernet power driving unit 206 .

[0067] In this embodiment, the current monitoring unit 208 can obtain the current from the Ethernet power drive unit 206 through the SCPI instruction, and can also obtain the current from the current output port of the analog power drive unit 205. The voltage monitoring unit 209 can obtain the voltage from the Ethernet power drive unit 206 through the SCPI instruction, and can also obtain the voltage from the voltage output port of the analog power drive unit 205. The way in which the current monitoring unit 208 and the voltage monitoring unit 209 obtain the current and voltage is very simple and reliable. The current monitoring unit 208 has a display interface that can display the monitored current. Similarly, the voltage monitoring unit 209 and the irradiance monitoring unit 207 also have a display interface that can display the monitored voltage and irradiance intensity.

[0068] In an embodiment of the present specification, the monitoring module 203 may further include a power monitoring unit 210 .

[0069] The power monitoring unit 210 is used to obtain the current at the current monitoring unit 208 and the voltage at the voltage monitoring unit 209, and determine the power of the light-emitting device in the solar simulator based on the obtained voltage and current.

[0070] In this embodiment, the power monitoring unit 210 also has a display interface, which can display the obtained voltage, current and power. Each monitoring unit in the monitoring module 203 can display the monitored information through the display interface, so that relevant personnel can understand the real-time working status of the solar simulator.

[0071] In one embodiment of the present specification, the control module 204 is further used to compare the power monitored by the power monitoring unit 210 with the set power of the light-emitting device;

[0072] When the power monitored by the power monitoring unit 210 is less than the set power, the output voltage or current of the power driving module 202 is increased;

[0073] When the power monitored by the power monitoring unit 210 is greater than the set power, the output voltage or current of the power driving module 202 is reduced.

[0074] In this embodiment, when the power monitored by the power monitoring unit 210 is less than the set power, the output voltage or current of the power driving module 202 is increased; when the power monitored by the power monitoring unit 210 is greater than the set power, the output voltage or current of the power driving module 202 is reduced. This can place the light-emitting device in a stable operating state, and is also beneficial to ensuring the stability of the irradiation intensity.

[0075] In one embodiment of the present specification, the light emitting device is a xenon lamp.

[0076] In this embodiment, the number of xenon lamps can be one or more. When the number of xenon lamps is more than one, the multiple xenon lamps can form a xenon lamp array. The xenon lamp array can output a stable solar radiation intensity. The control system 20 of the solar simulator can be used for large and medium-sized solar simulators to ensure that the large and medium-sized solar simulators output high-precision and high-reliability radiation intensity.

[0077] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0078] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control system for a solar simulator, characterized in that: It includes a power drive module, a monitoring module and a control module; wherein the power drive module includes an analog power drive unit and an Ethernet power drive unit, and the monitoring module includes an irradiance monitoring unit; The analog power driving unit is used to connect to the power analog port of the solar simulator and output voltage and current to the power analog port; The Ethernet power drive unit is used to connect to the power Ethernet port of the solar simulator, and output voltage and current to the power Ethernet port when the analog power drive unit fails; The irradiance monitoring unit is used to monitor the irradiance intensity of the solar simulator; The control module is used to determine the control mode of the solar simulator based on the irradiation intensity, and control the power drive module to output voltage and current to the solar simulator based on the control mode to control the irradiation intensity of the solar simulator.

2. The control system of the solar simulator according to claim 1, characterized in that: The control module is also used to determine whether the irradiation intensity falls within a preset standard intensity range; If yes, determining that the control mode of the solar simulator is a closed-loop control mode; The power driving module is controlled to output voltage and current to the solar simulator based on the closed-loop control mode.

3. The control system of the solar simulator according to claim 2, characterized in that: The method of controlling the power driving module to output voltage and current to the solar simulator based on the closed-loop control mode includes: Comparing the irradiation intensity with a preset intensity threshold, wherein the preset intensity threshold belongs to the preset standard intensity range; When the radiation intensity is less than the preset intensity threshold, increasing the output voltage or current of the power driving module; When the radiation intensity is greater than the preset intensity threshold, the output voltage or current of the power driving module is reduced.

4. The control system of the solar simulator according to claim 3, characterized in that: The control module is also used to adjust the light irradiation angle of the light emitting device in the solar simulator when the irradiation intensity is greater than the preset intensity threshold, so as to reduce the irradiation intensity of the current irradiated area.

5. The control system of the solar simulator according to claim 1, characterized in that: The control module is further configured to determine that the control mode of the solar simulator is an open-loop control mode if the irradiation intensity does not fall within a preset standard intensity range; The power driving module is controlled to output voltage and current to the solar simulator based on the open-loop control mode.

6. The control system of the solar simulator according to claim 5, characterized in that: The method of controlling the power driving module to output voltage and current to the solar simulator based on the open-loop control mode includes: Obtaining a pre-established calibration relationship between the irradiance intensity and the output power of the light emitting device power supply in the solar simulator, as well as a target irradiance intensity; Matching the target irradiation intensity with the irradiation intensity in the calibration relationship, and determining the output power of the light emitting device power supply corresponding to the irradiation intensity in the calibration relationship that is the same as the target irradiation intensity; The power driver module is controlled to output voltage and current to the solar simulator based on the determined output power of the light emitting device power supply.

7. The control system of the solar simulator according to claim 1, characterized in that: The monitoring module also includes a current monitoring unit and a voltage monitoring unit; The current monitoring unit is used to obtain current at the current output port of the analog power drive unit; or to obtain current at the Ethernet power drive unit; The voltage monitoring unit is used to obtain voltage at the voltage output port of the analog power drive unit; or to obtain voltage at the Ethernet power drive unit.

8. The control system of the solar simulator according to claim 7, characterized in that: The monitoring module also includes a power monitoring unit; The power monitoring unit is used to obtain the current in the current monitoring unit and the voltage in the voltage monitoring unit, and determine the power of the light-emitting device in the solar simulator based on the obtained voltage and current.

9. The control system of the solar simulator according to claim 8, characterized in that: The control module is also used to compare the power monitored by the power monitoring unit with the set power of the light-emitting device; When the power monitored by the power monitoring unit is less than the set power, increasing the output voltage or current of the power driving module; When the power monitored by the power monitoring unit is greater than the set power, the output voltage or current of the power driving module is reduced.

10. The control system of the solar simulator according to claim 4, characterized in that: The light emitting device is a xenon lamp.

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