Intelligent closed-loop control system for stabilizing temperature difference of large sun orientation mechanism

Abstract

The invention discloses an intelligent closed-loop control system for stabilizing the temperature difference of a large sun orientation mechanism. The intelligent closed-loop control system comprises a temperature acquisition circuit, a heating control module and a heater loop module, wherein the temperature acquisition circuit is used for acquiring temperature parameters corresponding to each temperature measurement channel; the heating control module is used for obtaining a temperature difference value of each temperature measurement channel according to the temperature parameter corresponding to each temperature measurement channel and a preset temperature control reference voltage, and obtaining a switching signal of a heating loop corresponding to each temperature measurement channel according to the temperature difference value of each temperature measurement channel; a switching signal of the heating loop corresponding to each temperature measurement channel is transmitted to the heater loop module; and the heater loop module is used for controlling automatic heating and disconnection of the heating loop corresponding to each temperature measurement channel according to the switching signal of the heating loop corresponding to each temperature measurement channel. The temperature difference range between the mechanisms is effectively controlled, and the technical problem of mechanism movement gap mismatching caused by large temperature difference between the two ends of a large mechanism is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of spacecraft thermal management, and in particular relates to an intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar orientation mechanism. Background Art

[0002] With the development of my country's aerospace technology, large space mechanisms and solar-directed mechanisms will be widely used. In view of the working characteristics of large solar-directed mechanisms, when large mechanisms are working in orbit, one side is exposed to the sun for a long time, resulting in high surface temperature of the mechanism, and the other side is not exposed to the sun for a long time, resulting in low surface temperature of the mechanism. The long-term high and low temperature difference will lead to mismatch of the mechanism movement gap, and finally destroy the movement gap of the large mechanism, causing the mechanism to fail and damage. In order to ensure the long-term stable and reliable operation of large space mechanisms in orbit, it is necessary to effectively solve the technical problem of large temperature difference at both ends of the control mechanism. Summary of the invention

[0003] The technical problem solved by the present invention is: to overcome the shortcomings of the prior art, to provide an intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directing mechanism, to effectively control the temperature difference range between the mechanisms, and to solve the technical problem of mismatched mechanism movement gaps caused by large temperature differences at both ends of a large mechanism.

[0004] The object of the present invention is achieved through the following technical solutions: an intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directed orientation mechanism, comprising: a temperature acquisition circuit, a heating control module and a heater circuit module; wherein the temperature acquisition circuit: acquires the temperature parameters corresponding to each temperature measuring channel, and transmits the temperature parameters corresponding to each temperature measuring channel to the heating control module; the heating control module: receives the temperature parameters corresponding to each temperature measuring channel, obtains the temperature difference of each temperature measuring channel according to the temperature parameters corresponding to each temperature measuring channel and a preset temperature control reference voltage, obtains the switching signal of the heating circuit corresponding to each temperature measuring channel according to the temperature difference of each temperature measuring channel, and transmits the switching signal of the heating circuit corresponding to each temperature measuring channel to the heater circuit module; the heater circuit module: receives the switching signal of the heating circuit corresponding to each temperature measuring channel, and controls the autonomous heating and disconnection of the heating circuit corresponding to each temperature measuring channel according to the switching signal of the heating circuit corresponding to each temperature measuring channel.

[0005] The above-mentioned intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar-directed directional mechanism also includes: a bus signal circuit and a bus processor; wherein, the bus processor: when the temperature control reference voltage needs to be modified, receives external preset temperature control data, and transmits the preset temperature control data to the bus signal circuit; the bus signal circuit: receives the preset temperature control data, obtains a new temperature control reference voltage after processing the preset temperature control data, and injects the new temperature control reference voltage into the heating control module.

[0006] In the above-mentioned intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directing mechanism, the temperature difference of each temperature measuring channel is obtained according to the temperature parameter corresponding to each temperature measuring channel and the temperature control reference voltage, including: subtracting the temperature parameter corresponding to each temperature measuring channel from the temperature control reference voltage to obtain the temperature difference corresponding to each temperature measuring channel.

[0007] In the above-mentioned intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directing directional mechanism, the switch signal of the heating circuit corresponding to each temperature measuring channel is obtained according to the temperature difference of each temperature measuring channel, including: when the temperature difference of each temperature measuring channel is greater than 8°C, the switch signal of the two-stage heating circuit corresponding to each temperature measuring channel is on; when the temperature difference of each temperature measuring channel is not less than 4°C and not greater than 8°C, the switch signal of the first-stage heating circuit corresponding to each temperature measuring channel is on, and the switch signal of the first-stage heating circuit corresponding to each temperature measuring channel is off; when the temperature difference of each temperature measuring channel is ≤4°C, the switch signal of the two-stage heating circuit corresponding to each temperature measuring channel is off.

[0008] In the above-mentioned intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directed orientation mechanism, the heating control module includes an A / D converter and a CPU; wherein the A / D converter is connected to the CPU; the A / D converter: receives the temperature parameters corresponding to each temperature measuring channel, converts the temperature parameters corresponding to each temperature measuring channel into the temperature digital parameters corresponding to each temperature measuring channel, and transmits the temperature digital parameters corresponding to each temperature measuring channel to the CPU; the CPU: obtains the temperature difference of each temperature measuring channel according to the temperature digital parameters corresponding to each temperature measuring channel and the preset temperature control reference voltage, obtains the switching signal of the heating circuit corresponding to each temperature measuring channel according to the temperature difference of each temperature measuring channel, and transmits the switching signal of the heating circuit corresponding to each temperature measuring channel to the heater circuit module.

[0009] In the above-mentioned intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar-directed orientation mechanism, the heater circuit module includes: a power drive unit and a heating circuit; wherein each power drive unit receives a switching signal of the heating circuit corresponding to each temperature measuring channel, and controls the autonomous heating and disconnection of the heating circuit corresponding to each temperature measuring channel according to the switching signal of the heating circuit corresponding to each temperature measuring channel.

[0010] The above-mentioned intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar-directed orientation mechanism further includes: a power supply module; wherein the power supply module supplies power to the temperature acquisition circuit and the heating control module respectively.

[0011] In the above-mentioned intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar-orienting mechanism, the power supply module includes a surge protection circuit, an EMI filter and a DC / DC power supply module; wherein the surge protection circuit receives a primary power supply and transmits the primary power supply to the EMI filter; the EMI filter filters the primary power supply to obtain a filtered power supply, and transmits the filtered power supply to the DC / DC power supply module; the DC / DC power supply module receives the filtered power supply and converts the filtered power supply into a preset power supply.

[0012] In the above-mentioned intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directing mechanism, the primary power supply is 100V.

[0013] In the above-mentioned intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directing mechanism, the CPU is an 8-bit single-chip microcomputer 80C32.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention solves the problem of large temperature difference at both ends of a large-scale solar orientation mechanism due to different exposure to sunlight. The temperature difference at both ends of the mechanism is reasonably controlled through a closed-loop control system, thereby ensuring the long-term operation of the large-scale solar orientation mechanism.

[0016] (2) The present invention can effectively identify the temperature conditions of various parts of a large mechanism through temperature collection and effectively control the temperature difference range between mechanisms;

[0017] (3) The present invention intelligently identifies and compares the information obtained through temperature collection, and automatically triggers the on / off control of the heating system;

[0018] (4) When problems occur in the existing control strategy, the present invention can readjust the temperature control strategy of the system through the parameter injection interface to enhance the fault tolerance of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0020] Figure 1 It is a structural block diagram of an intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directed orientation mechanism provided by an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the temperature measurement layout of a large-scale sun-directed mechanism provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Figure 1 1 is a block diagram of an intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directed orientation mechanism provided by an embodiment of the present invention. Figure 1 As shown, the intelligent closed-loop control system for stabilizing the temperature difference of a large solar-oriented mechanism includes: a temperature acquisition circuit, a heating control module and a heater loop module.

[0024] Temperature acquisition circuit: collects the temperature parameters corresponding to each temperature measurement channel, and transmits the temperature parameters corresponding to each temperature measurement channel to the heating control module; heating control module: receives the temperature parameters corresponding to each temperature measurement channel, obtains the temperature difference of each temperature measurement channel according to the temperature parameters corresponding to each temperature measurement channel and the preset temperature control reference voltage, obtains the switching signal of the heating circuit corresponding to each temperature measurement channel according to the temperature difference of each temperature measurement channel, and transmits the switching signal of the heating circuit corresponding to each temperature measurement channel to the heater circuit module; heater circuit module: receives the switching signal of the heating circuit corresponding to each temperature measurement channel, and controls the autonomous heating and disconnection of the heating circuit corresponding to each temperature measurement channel according to the switching signal of the heating circuit corresponding to each temperature measurement channel.

[0025] like Figure 1 As shown, the intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directed mechanism also includes: a bus signal circuit and a bus processor; wherein the bus processor: when the temperature control reference voltage needs to be modified, receives external preset temperature control data, and transmits the preset temperature control data to the bus signal circuit; the bus signal circuit: receives the preset temperature control data, obtains a new temperature control reference voltage after processing the preset temperature control data, and injects the new temperature control reference voltage into the heating control module.

[0026] Obtaining the temperature difference of each temperature measurement channel according to the temperature parameter corresponding to each temperature measurement channel and the temperature control reference voltage includes: subtracting the temperature parameter corresponding to each temperature measurement channel from the temperature control reference voltage to obtain the temperature difference corresponding to each temperature measurement channel.

[0027] The switch signal of the heating circuit corresponding to each temperature measuring channel obtained according to the temperature difference of each temperature measuring channel includes: when the temperature difference of each temperature measuring channel is greater than 8°C, the switch signal of the two-stage heating circuit corresponding to each temperature measuring channel is turned on; when the temperature difference of each temperature measuring channel is not less than 4°C and not greater than 8°C, the switch signal of the first-stage heating circuit corresponding to each temperature measuring channel is turned on, and the switch signal of the first-stage heating circuit corresponding to each temperature measuring channel is turned off; when the temperature difference of each temperature measuring channel is ≤4°C, the switch signal of the two-stage heating circuit corresponding to each temperature measuring channel is turned off. It should be understood that each temperature measuring channel corresponds to two-stage heating circuits, the first-stage heating circuit and the second-stage heating circuit.

[0028] The heating control module includes an A / D converter and a CPU; wherein the A / D converter and the CPU are connected.

[0029] The A / D converter receives the temperature parameter corresponding to each temperature measurement channel, converts the temperature parameter corresponding to each temperature measurement channel into the temperature digital parameter corresponding to each temperature measurement channel, and transmits the temperature digital parameter corresponding to each temperature measurement channel to the CPU; the CPU: obtains the temperature difference of each temperature measurement channel according to the temperature digital parameter corresponding to each temperature measurement channel and the preset temperature control reference voltage, obtains the switch signal of the heating circuit corresponding to each temperature measurement channel according to the temperature difference of each temperature measurement channel, and transmits the switch signal of the heating circuit corresponding to each temperature measurement channel to the heater circuit module. Specifically, the CPU is an 8-bit single-chip microcomputer 80C32.

[0030] The heater circuit module includes: a power drive unit and a heating circuit; wherein each power drive unit receives a switch signal of the heating circuit corresponding to each temperature measurement channel, and controls the autonomous heating and disconnection of the heating circuit corresponding to each temperature measurement channel according to the switch signal of the heating circuit corresponding to each temperature measurement channel. It should be understood that each heating circuit corresponds to a power drive unit.

[0031] like Figure 1 As shown, the intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directed orientation mechanism also includes: a power module; wherein the power module supplies power to the temperature acquisition circuit and the heating control module respectively.

[0032] The power module includes a surge protection circuit, an EMI filter and a DC / DC power module; wherein the surge protection circuit receives a primary power supply and transmits the primary power supply to the EMI filter; the EMI filter filters the primary power supply to obtain a filtered power supply and transmits the filtered power supply to the DC / DC power module; the DC / DC power module receives the filtered power supply and converts the filtered power supply into a preset power supply. Specifically, the primary power supply is 100V.

[0033] The temperature collection circuit uses thermistors Ti (i=1, 2, 3, indicating the first, second or third thermistor) to collect temperature parameters of the rotating end of the large sun-facing mechanism and the connecting bracket itself.

[0034] The heating control module uses the temperature parameters of the two end surfaces of the sun mechanism collected by the thermistor and the preset temperature control reference voltage Vref (i) After comparison, it is converted into a switch signal, i.e., a temperature control signal S (k) (k=1,2,3), through the temperature control signal S (k) Realize the control switch N of the power drive unit, that is, the heating circuit (n) Autonomous on and off control of the heating circuit control switch N (n) Using MOS tube, through the temperature control signal S (k) Realizes autonomous heating and disconnection control of the heater circuit.

[0035] like Figure 1 As shown, the heater circuit module also includes: a power supply control switch (K1, K2), the power supply control switch (K1, K2) is connected to the heating circuit, the power supply control switch (K1, K2) adopts a relay and remains in an on state, and can be controlled on and off by external instructions.

[0036] The temperature acquisition circuit transmits the temperature parameters corresponding to each temperature measurement channel to the bus signal circuit, the heating control module transmits the switch signal of the heating circuit corresponding to each temperature measurement channel to the bus signal circuit, and the bus signal circuit transmits the temperature parameters corresponding to each temperature measurement channel and the switch signal of the heating circuit corresponding to each temperature measurement channel to the bus processor. The bus processor judges the need to adjust the working reference of the heating control module based on the temperature parameters corresponding to each temperature measurement channel and the switch signal of the heating circuit corresponding to each temperature measurement channel. The ground sends the temperature control data to the bus processor, injects the bus signal into the bus signal circuit, and after signal processing, the new temperature control reference voltage Vref is (i) The modifications made realize the parameter adjustment of the heating control circuit and achieve the purpose of changing the system temperature control strategy.

[0037] The temperature control range of the intelligent closed-loop control system that stabilizes the temperature difference of large-scale sun-directed mechanisms is set in grades:

[0038] Heater circuit N (a) (a is the odd-numbered heating circuit) The temperature control strategy is set as follows: if △T(a)>4℃, the heating switch is turned on; if △T(a)≤4℃, the heating switch is turned off. Heater circuit N (b)(b is the even number heating circuit) The temperature control range is set to: if △T(b)>8℃, the switch is turned on; if △T(b)≤8℃, the switch is turned off. △T(a) and △T(b) are: The highest temperature in the temperature measurement parameter T(n) is taken as the temperature control reference voltage Vref (i) , the temperature difference between the two is obtained by comparing other temperatures with the reference voltage.

[0039] When the first-level odd-number heating circuit cannot meet the temperature control requirements, the second-level even-number heating circuit is started.

[0040] In order to effectively control the large temperature difference between the two ends of the large-scale solar directional mechanism due to different exposure, the intelligent closed-loop control system of the temperature difference of the large-scale solar directional mechanism is used to set up 47 temperature collection positions at the rotating end and connecting bracket of the large-scale solar directional mechanism, of which 8 channels T1~T8 are used for temperature control. Figure 2 shown.

[0041] By collecting temperature parameters at 8 locations, the temperature parameters are transmitted to the CPU control circuit through the temperature measurement channel, and the highest temperature is taken as the temperature control reference voltage Vref (i) , compare other temperatures with the reference voltage. When the temperature difference between the two is greater than 4°C, the single heating circuit control switch N is properly controlled. (a) When the temperature difference between the two is greater than 8℃, the heating circuit control switch N is properly controlled. (b) The temperature difference in each part of the mechanism is controlled within 4℃, ensuring the long-term operation of the large-scale sun-directed mechanism.

[0042] The power supply control switch K1 in the heater circuit controls the 1st to 8th heating circuits, and K2 controls the 9th to 16th heating circuits; the power supply control switch K1 remains in the on state and can be controlled on and off by the external command i1; the power supply control switch K2 remains in the on state and can be controlled on and off by the external command i2.

[0043] 1st to 16th heating circuit start control switch N (1) ~N (16) , respectively through the temperature control signal S (1) ~S (16) Realize autonomous heating and disconnection control of each heater circuit.

[0044] The temperature parameters of T1~T47 are sent to the bus signal circuit through the temperature acquisition circuit. After the signal is processed into a bus signal, it is sent to the bus processor and then transmitted to the ground, so as to realize the ground monitoring of the voltage parameters and heating status corresponding to the temperature control point.

[0045] The ground monitors the working status of the large-scale sun-directing mechanism through the temperature parameters of T1~T47. When the temperature control reference voltage Vref is needed (i) When making changes, the temperature control data is sent to the bus processor, and the bus signal is injected into the bus signal circuit. After signal processing, the new temperature control reference voltage Vref (i) The parameters of the heating control circuit can be adjusted by injecting modifications into the CPU control circuit.

[0046] In order to improve the reliability of the intelligent closed-loop control system of temperature difference of large-scale sun-directed directional mechanism, the temperature control strategy adopts temperature range classification setting.

[0047] Heater circuit N (1) 、N (3) 、N (5) 、N (7) 、N (9) 、N (11) 、N (13)、 N (15) The temperature control temperature difference strategy is set as follows: if △T1>4℃, the switch is turned on; if △T1≤4℃, the switch is turned off.

[0048] Heater circuit N (2) 、N (4) 、N (6) 、N (8) 、N (10) 、N (12) 、N (14)、 N (16) The temperature control temperature difference range is set as follows: if △T2>8℃, the switch is turned on; if △T2≤8℃, the switch is turned off.

[0049] When the first-level odd-number heating circuit cannot meet the temperature control requirements, the second-level even-number heating circuit is started.

[0050] This embodiment solves the problem of large temperature difference at both ends of a large-scale solar-directing mechanism due to different exposure to sunlight, and reasonably controls the temperature difference at both ends of the mechanism through a closed-loop control system to ensure the long-term operation of the large-scale solar-directing mechanism; this embodiment can effectively identify the temperature conditions of various parts of a large-scale mechanism through temperature collection, and effectively control the temperature difference range between mechanisms; this embodiment intelligently identifies and compares the information obtained through temperature collection, and automatically triggers the on and off control of the heating system; this embodiment can readjust the temperature control strategy of the system through a parameter injection interface when problems occur in the existing control strategy, thereby enhancing the fault tolerance of the system.

[0051] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An intelligent closed-loop control system for stabilizing the temperature difference of a large solar orientation mechanism, characterized in that include: Temperature acquisition circuit, heating control module and heater loop module; wherein, The temperature acquisition circuit is used to acquire the temperature parameters corresponding to each temperature measurement channel, and transmit the temperature parameters corresponding to each temperature measurement channel to the heating control module; The heating control module receives the temperature parameter corresponding to each temperature measurement channel, obtains the temperature difference of each temperature measurement channel according to the temperature parameter corresponding to each temperature measurement channel and the preset temperature control reference voltage, obtains the switch signal of the heating circuit corresponding to each temperature measurement channel according to the temperature difference of each temperature measurement channel, and transmits the switch signal of the heating circuit corresponding to each temperature measurement channel to the heater circuit module; The heater circuit module receives a switch signal of the heating circuit corresponding to each temperature measuring channel, and controls the autonomous heating and disconnection of the heating circuit corresponding to each temperature measuring channel according to the switch signal of the heating circuit corresponding to each temperature measuring channel.

2. The intelligent closed-loop control system for stabilizing the temperature difference of a large-scale sun-directed orientation mechanism according to claim 1 is characterized in that Also includes: A bus signal circuit and a bus processor; wherein, The bus processor receives external preset temperature control data when the temperature control reference voltage needs to be modified, and transmits the preset temperature control data to the bus signal circuit; The bus signal circuit receives preset temperature control data, processes the preset temperature control data to obtain a new temperature control reference voltage, and injects the new temperature control reference voltage into the heating control module.

3. The intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar orientation mechanism according to claim 1 is characterized in that: The temperature difference of each temperature measurement channel obtained according to the temperature parameter corresponding to each temperature measurement channel and the temperature control reference voltage includes: The temperature difference value corresponding to each temperature measurement channel is obtained by subtracting the temperature parameter corresponding to each temperature measurement channel from the temperature control reference voltage.

4. The intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar orientation mechanism according to claim 1 is characterized in that: The switch signal of the heating circuit corresponding to each temperature measurement channel is obtained according to the temperature difference of each temperature measurement channel, including: When the temperature difference of each temperature measurement channel is greater than 8°C, the switch signal of the two-stage heating circuit corresponding to each temperature measurement channel is turned on; When the temperature difference of each temperature measurement channel is not less than 4°C and not greater than 8°C, the switch signal of the first-stage heating circuit corresponding to each temperature measurement channel is turned on, and the switch signal of the first-stage heating circuit corresponding to each temperature measurement channel is turned off; When the temperature difference of each temperature measurement channel is ≤4°C, the switch signal of the two-stage heating circuit corresponding to each temperature measurement channel is closed.

5. The intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar orientation mechanism according to claim 1 is characterized in that: The heating control module includes an A / D converter and a CPU; wherein, The A / D converter is connected to the CPU; The A / D converter receives the temperature parameter corresponding to each temperature measurement channel, converts the temperature parameter corresponding to each temperature measurement channel into a digital temperature parameter corresponding to each temperature measurement channel, and transmits the digital temperature parameter corresponding to each temperature measurement channel to the CPU; The CPU: obtains the temperature difference of each temperature measuring channel according to the temperature digital parameter corresponding to each temperature measuring channel and the preset temperature control reference voltage, obtains the switching signal of the heating circuit corresponding to each temperature measuring channel according to the temperature difference of each temperature measuring channel, and transmits the switching signal of the heating circuit corresponding to each temperature measuring channel to the heater circuit module.

6. The intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar orientation mechanism according to claim 1 is characterized in that: The heater circuit module comprises: a power drive unit and a heating circuit; wherein, Each power driving unit receives a switching signal of a heating circuit corresponding to each temperature measuring channel, and controls the autonomous heating and disconnection of the heating circuit corresponding to each temperature measuring channel according to the switching signal of the heating circuit corresponding to each temperature measuring channel.

7. The intelligent closed-loop control system for stabilizing the temperature difference of a large solar orientation mechanism according to claim 1 is characterized in that Also includes: Power supply module; wherein the power supply module supplies power to the temperature acquisition circuit and the heating control module respectively.

8. The intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar orientation mechanism according to claim 7, characterized in that: The power supply module includes a surge protection circuit, an EMI filter and a DC / DC power supply module; wherein, The surge protection circuit receives a primary power supply and transmits the primary power supply to the EMI filter; The EMI filter filters the primary power supply to obtain filtered power supply, and transmits the filtered power supply to the DC / DC power supply module; The DC / DC power supply module receives the filtered power supply and converts the filtered power supply into a preset power supply.

9. The intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar orientation mechanism according to claim 8, characterized in that: The primary power supply is 100V.

10. The intelligent closed-loop control system for stabilizing the temperature difference of a large-scale solar orientation mechanism according to claim 5, characterized in that: The CPU is an 8-bit single-chip microcomputer 80C32.

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