System and method for verifying thermal protection function of low-temperature device

Abstract

The invention provides a thermal protection function verification system and method for a low-temperature device, and the system comprises a control device which is used for executing configurable temperature control logic and generating a heating control instruction; the heating execution device is connected to the control device and used for responding to the heating control instruction and providing controllable heating power for a heating element in the to-be-tested thermal protection device; the temperature measurement sensing device is connected to the control device and is used for collecting multi-point temperature signals in the thermal protection device to be measured and feeding back the multi-point temperature signals to the control device; and the integrated transmission device is used for transmitting power supply and signals among the control device, the heating execution device and the temperature measurement sensing device. According to the method, adaptive design is carried out by combining protection design characteristics of the device, multi-channel and multi-temperature-control-mode temperature control of multiple protection devices can be met, an effective technical means and engineering equipment are provided for verification of thermal design correctness of the low-temperature device, and the method has important engineering value and positive practical significance.

Description

Technical Field

[0001] This application relates to the field of space environment monitoring technology, and more specifically, to a system and method for verifying the thermal protection function of cryogenic devices. Background Technology

[0002] In the field of aircraft ground testing, it is necessary to verify the performance of thermal protection devices in low-temperature environments. Currently, verification often uses general-purpose temperature control equipment or customized solutions.

[0003] In related technologies, general-purpose temperature control systems are mostly used in normal temperature environments, and have limitations in terms of low temperature adaptability, number of channels and temperature control modes, and are difficult to flexibly adapt to the verification requirements of different structural protection devices.

[0004] Therefore, there is a lack of an integrated testing system that can support multi-channel, multi-mode independent temperature control in low-temperature environments and flexibly adapt to the verification needs of diverse protective devices. Summary of the Invention

[0005] The purpose of this application is to provide a calibration system, apparatus, medium, and electronic device for plasma detection data, which can solve at least one of the aforementioned technical problems. The specific solution is as follows:

[0006] According to a specific embodiment of this application, in a first aspect, this application provides a thermal protection function verification system for cryogenic devices, the system comprising:

[0007] A control device for executing configurable temperature control logic and generating heating control commands;

[0008] A heating actuator, connected to the control device, is used to respond to the heating control command and provide controllable heating power to the heating element in the heat protection device under test;

[0009] A temperature sensing device is connected to the control device and is used to collect multi-point temperature signals inside the thermal protection device under test and feed them back to the control device.

[0010] An integrated transmission device is used to transmit power supply and signals between the control device, the heating actuator, and the temperature sensing device.

[0011] In a possible embodiment, the control device includes a hardware platform and host computer software built on a programmable logic controller. The host computer software is used to configure temperature control logic for multiple independent heating channels and temperature measurement channels. The temperature control logic includes at least one of independent closed-loop control, independent open-loop control, and bypass tracking mode. The heating execution device includes a programmable DC power supply, a constant voltage bus powered by the programmable DC power supply, and a solid-state power regulating device connected between the constant voltage bus and the heating element.

[0012] In a possible embodiment, in the heating actuator, a fuse is connected in series in the circuit of each heating channel and a Hall current sensor is provided for detecting the on / off state of the channel.

[0013] In a possible embodiment, the temperature sensing device includes a platinum resistance temperature sensor and a Modbus-based multi-channel temperature sensing module, which is installed inside the thermal protection device.

[0014] In a possible embodiment, the integrated transmission device is a composite cable comprising multiple pairs of parallel power supply cores and at least one set of differential communication cores with a shielding layer, and the cable is provided with a low-temperature resistant sheath.

[0015] In a possible embodiment, the system supports multiple independent heating control channels and multiple independent temperature acquisition channels, with a temperature measurement range covering -200℃ to +200℃, a maximum heating power of no less than 550W per channel, and a temperature control accuracy better than ±1℃.

[0016] In a possible embodiment, the output voltage of the programmable DC power supply can be remotely set and adjusted, and the operating parameters can be remotely monitored; the hardware of the control device, heating actuator, and temperature sensing device adopts a modular design with standard interfaces.

[0017] In a possible embodiment, the host computer software communicates with the PLC hardware platform via the Profinet bus.

[0018] According to a specific embodiment of this application, in a second aspect, this application also provides a method for verifying the thermal protection function of a cryogenic device, the method comprising:

[0019] A heating element and a temperature sensor are arranged inside the thermal protection device to be tested;

[0020] Dedicated control and acquisition channels are provided for heating elements and temperature sensors;

[0021] Temperature control logic is configured for at least one heating channel using independent closed-loop, independent open-loop, or bypass tracking modes via a host computer.

[0022] In low-temperature environments, based on the configured logic and temperature feedback, power control of the heating channels is performed in the corresponding mode, and at least one channel performs bypass tracking mode.

[0023] Collect temperature and control data from each channel to verify the performance of the thermal protection device under multi-mode temperature control.

[0024] In a possible embodiment, an active temperature control zone and a passive following zone are distinguished according to the temperature control logic configuration; temperature control data and temperature response data of the two zones are collected synchronously.

[0025] By analyzing the correlation between the data from the two regions, the thermal insulation performance parameters of the thermal protection device and the thermal coupling strength between the regions were determined.

[0026] Compared with the prior art, the above-described solutions of this application have at least the following beneficial effects:

[0027] The heating solution, which combines a constant voltage busbar with solid-state relays, significantly reduces the number of independent power supplies, saves equipment space and costs, and improves power supply reliability. It supports multi-channel independent configuration and has multiple temperature control modes, including open-loop, closed-loop, and bypass tracking, to meet the verification needs of thermal protection devices with different structures. By integrating power supply and communication lines through comprehensive cabling, the number of cables is reduced, wiring complexity is lowered, and the transmission stability of the system in low-temperature environments is improved. The modular and standardized design facilitates system expansion and reconfiguration, making it suitable for both laboratory thermal protection verification and deployment as a portable temperature control system for field use. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0029] Figure 1 A schematic diagram of the composition principle of the thermal protection function verification system for a cryogenic device provided in an embodiment of the present invention;

[0030] Figure 2 Hardware electrical schematic diagram of the test system for the thermal protection function verification system of the cryogenic device provided in the embodiments of the present invention;

[0031] Figure 3 A schematic diagram of the integrated cable design of the test system for the thermal protection function verification system of the cryogenic device provided in the embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the test method flow for the thermal protection function verification system of the cryogenic device provided in an embodiment of the present invention;

[0033] Explanation of reference numerals in the attached figures:

[0034] 101. Control cabinet; 102. Control center; 103. I / O devices; 104. Power supply; 105. Current status sensor; 106. Solid-state power regulator matrix; 107. Protective device; 108. Temperature sensor; 109. Heating element; 110. Temperature measurement module; 111. Composite cable; 201. Power supply; 202. Constant voltage busbar; 203. Fuse; 204. Solid-state sensor; 205. Hall sensor; 206. Heating element; 207. Temperature measurement module; 3001. Core power supply wire; 3002. Core communication wire; 3003. Silver-plated copper braided layer; 3004. High and low temperature resistant aramid sheath. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms "a," "the," and "the" as used in the embodiments of this application and the appended claims are also intended to include the plural forms, and "multiple" generally includes at least two unless the context clearly indicates otherwise.

[0037] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0038] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0039] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or device that includes that element.

[0040] Temperature, as a crucial parameter in the operating environment of aircraft, is a key focus in the design of structural thermal stability and thermal protection. With the rapid development of aerospace technology and the increasing demands on aircraft development specifications, higher requirements are placed on the performance of ground testing equipment. More severe testing environments are required to simulate more realistic conditions and verify the correctness of the structural, force, and thermal model designs of the aircraft. To simulate the low-temperature environment of aircraft ground testing equipment, the electromechanical devices within the equipment must meet the requirements for low-temperature operation. Generally, multi-layer thermal insulation components and PIR insulating foam materials are used for passive thermal protection, while heating elements are still needed for active thermal protection.

[0041] To verify the correctness of the thermal design of the equipment's protective device, testing and verification under normal pressure and low temperature conditions are required before the design is finalized. Due to the diversity of protective equipment types and structures, the temperature control modes of the protective thermal design are diverse, and combined with the characteristics of industrial design, the design requirements of the heating and temperature measurement systems also have strong specificities.

[0042] Therefore, designing and inventing a test system that meets the design verification requirements of thermal protection devices for cryogenic devices, and adapting it by combining the characteristics of device protection design, can meet the temperature control requirements of multiple protection devices with multiple channels and multiple temperature control modes. This provides an effective technical means and engineering equipment for verifying the correctness of the thermal design of cryogenic devices, and has important engineering value and positive practical significance.

[0043] The optional embodiments of this application are described in detail below with reference to the accompanying drawings.

[0044] like Figure 1 As shown, this embodiment provides a thermal protection function verification system for cryogenic devices, the system comprising:

[0045] A control device for executing configurable temperature control logic and generating heating control commands;

[0046] The control unit serves as the brain and decision-making center of the verification system. Built on an industrial-grade programmable logic controller (PLC) hardware platform, it runs dedicated control and data acquisition software. Its main functions include parsing and executing complex temperature control logic flexibly configured by the user via a host computer; processing multi-channel temperature feedback signals from temperature sensors in real time and calculating closed-loop control algorithms; generating precise heating control command sequences; coordinating the synchronous operation of various sub-modules; and performing the system's self-test, safety interlock, and fault diagnosis functions.

[0047] A heating actuator, connected to the control device, is used to respond to the heating control command and provide controllable heating power to the heating element 109 in the heat protection device under test;

[0048] The heating actuator serves as the system's execution mechanism and power output unit. Directly controlled by the control unit, it converts digital control commands into actual thermal energy output. It provides highly stable heating power with programmable amplitude, timing, and waveform to the heating element 109 integrated within the thermal protection device under test, accurately simulating the thermal compensation required by various external aerodynamic heating, engine radiant heat, or active thermal management that an aircraft might experience in a real service environment.

[0049] A temperature sensing device is connected to the control device and is used to collect multi-point temperature signals inside the thermal protection device under test and feed them back to the control device.

[0050] The temperature sensing device serves as the system's sensor and feedback unit. Employing a highly reliable and accurate contact-type temperature measurement scheme, it is responsible for in-situ, real-time, and synchronously acquiring temperature signals from multiple key feature locations inside and on the surface of the thermal protection device 107. It converts the acquired analog temperature signals into standard digital signals and feeds them back to the control device, providing data for closed-loop control and raw data for performance evaluation. An integrated transmission device is used to transmit power and signals between the control device, the heating actuator, and the temperature sensing device.

[0051] The integrated transmission device is a special connection component designed specifically to cope with extremely low temperatures, strong electromagnetic interference, and complex mechanical stress environments. Its main function is to simultaneously, stably, and with low loss transmit high-power DC power, multiple low-noise analog / digital signals, and high-speed control bus data over a distance of tens of meters, ensuring that the entire system can still operate reliably under simulated harsh working conditions.

[0052] In this embodiment, the entire system is installed within a standard industrial control cabinet 101. The control center 102 within the cabinet, i.e., the core PLC unit, through its extended various I / O modules 103, realizes the acquisition of the on / off status and current values ​​of all channels of the heating system, as well as the output of control signals to all solid-state power devices; it is also responsible for data communication with the temperature measurement system. The heating system consists of a high-power programmable DC power supply 104 located within the cabinet, a sensor array 105 for real-time monitoring of the current in each heating circuit, and a solid-state relay matrix 106 constituting a multi-channel power adjustment unit. Ultimately, it drives the heating components 109 located inside the protective device 107 via cables. The temperature measurement system is entirely distributed at the front end, consisting of temperature sensors 108 (typically Pt100 platinum resistance thermometers) arranged at various measurement points on the protective device 107, and matching multi-channel temperature measurement modules 110 installed nearby. A key system-level design feature is that, in order to simplify the complex wiring within the cryogenic test chamber and improve reliability, all electrical connections between the heating element 109 and the temperature measurement module 110 and the control cabinet 101—including high-current power lines, module operating power lines, and digital communication lines—are innovatively integrated into a single high-performance composite cable 111.

[0053] In this embodiment, a heating scheme combining a constant voltage busbar 202 and a solid-state relay 204 is adopted, which significantly reduces the number of independent power supplies, saves equipment space and cost, and improves power supply reliability. It supports multi-channel independent configuration and has multiple temperature control modes such as open-loop, closed-loop, and bypass tracking, which can adapt to the verification requirements of thermal protection devices with different structures. The integrated power supply and communication lines are integrated through the comprehensive cable 111, which reduces the number of cables, reduces wiring complexity, and improves the transmission stability of the system in low-temperature environments. The modular and standardized design facilitates system expansion and reconstruction, and can be used for laboratory thermal protection verification or deployed as a portable temperature control system in the field.

[0054] like Figure 2As shown, the control device specifically consists of a hardware platform based on a high-performance programmable logic controller (PLC) and powerful host computer monitoring software. The host computer software not only provides an intuitive graphical engineering configuration interface, allowing users to define independent control logic, alarm conditions, data recording strategies, and safety parameters for each heating and temperature measurement channel in a WYSIWYG manner, but also includes a built-in advanced control algorithm library and data analysis tools. The user-configured scheme can be downloaded to the PLC for execution with a single click. The temperature control logic covers at least three basic modes: independent closed-loop control, such as using an adaptive PID algorithm, to achieve precise tracking and stabilization of the target temperature; independent open-loop control, which is programmed according to a preset time-power curve to simulate a known heat flux profile; and bypass tracking mode, which automatically and in real-time synchronizes the power output of one or more channels to a designated dominant closed-loop channel to simulate thermal coupling effects.

[0055] Meanwhile, the core power supply for the heating actuator is a high-precision, programmable, high-power DC linear power supply or switching power supply 201. This power supply outputs an extremely stable DC constant voltage bus 202, whose voltage value can be remotely set according to test requirements. All end effectors of the heating channels—solid-state power regulating devices 204, such as solid-state relays or MOSFET modules—are connected in parallel to this common bus. The essence of this architecture is "shared voltage source, independent current regulation." The control device precisely controls the conduction time ratio of each solid-state power regulating device 204 within one cycle by issuing pulse width modulation (PWM) signals, thereby independently and continuously adjusting the average current flowing through each heating element 206, achieving stepless precise control from zero to full power. In the main electrical circuit of each heating channel, a fast-acting fuse 203 is connected in series as the ultimate physical protection against overload and short-circuit faults. Simultaneously, a non-contact Hall effect current sensor 205 monitors the real-time operating current of each channel. These current signals are fed back to the control device, which not only enables more advanced power closed-loop control, but also can instantly diagnose abnormal conditions such as open circuit, short circuit, aging or loose connectors of heating elements, and trigger audible and visual alarms or automatically cut off fault channels, forming a multi-layered safety protection system that combines hardware and software.

[0056] The control device employs a programmable logic controller (PLC) hardware platform that works in conjunction with host computer software. The host computer software provides independent temperature control logic configuration functions for each heating and temperature measurement channel, supporting multiple control modes such as independent closed-loop, independent open-loop, and bypass tracking. The heating actuator is powered by a programmable DC power supply 201 supplying power to the constant voltage bus 202, and uses a solid-state power regulating device 204 to adjust the power of each heating element 206 connected to the bus, thereby achieving precise control of the heating channel.

[0057] In some embodiments, to ensure the safety and controllability of the high-power heating process, multiple protection and monitoring mechanisms are implemented for each independent channel of the heating actuator. Specifically, a fast-blow fuse 203 is connected in series in the electrical circuit of each heating channel as the final physical protection barrier against overcurrent and short-circuit faults. Simultaneously, a non-contact Hall current sensor 205 is connected in parallel to detect the effective current value and on / off status of the channel in real time and online. This design enables the system to not only achieve precise power control but also to instantly detect faults such as open circuits, short circuits, or abnormal connections in the heating element, triggering alarms or safety shutdowns through the control device, greatly improving the safety level and reliability of the system operation.

[0058] In some embodiments, the temperature sensing device employs a distributed architecture designed to improve measurement accuracy and anti-interference capabilities. The device consists of a platinum resistance temperature sensor 108 (e.g., Pt100) directly attached to the surface of the measured part, and multi-channel temperature measurement modules 110 and 207 based on the Modbus RTU protocol, installed nearby inside or near the thermal protection device 107. The platinum resistance sensor 108 converts the temperature physical quantity into a resistance signal; while the multi-channel temperature measurement modules 110 and 207 are responsible for signal amplification, linearization, cold junction compensation, and analog-to-digital conversion, directly outputting a digital value. By minimizing the transmission distance of the susceptible analog signal, errors and noise introduced by long-distance transmission are effectively avoided, thereby achieving high-fidelity, in-situ digital acquisition of the temperature signal.

[0059] In some embodiments, to address the reliable transmission requirements in low-temperature and complex electromagnetic environments, the integrated transmission device is specifically designed as a special composite cable 111. This cable employs a composite structure, internally integrating multiple pairs of parallel power supply cores 3001 with large cross-sectional areas to carry the high current required by the heating system and the front-end measurement module; simultaneously, it integrates at least one set of communication cores 3002 employing differential transmission technology and encased in a dense metal shielding layer 3003 for transmitting high-speed, interference-resistant digital communication signals such as Modbus and Profinet. To ensure its physical reliability under extreme temperatures, the outermost layer of the cable is protected by a special low-temperature resistant and wear-resistant flexible sheath 3004. This design highly integrates high-voltage, low-voltage, and signal transmission functions into a single cable, significantly simplifying the wiring complexity in confined spaces such as low-temperature tanks, and ensuring stable power transmission and complete signal communication in environments at -160°C and below through shielding and sheath design.

[0060] Figure 2 To test the system hardware electrical schematic, such as Figure 2As shown, the test system hardware is responsible for providing heating channels, detecting heating power supply signals, and detecting temperature signals. The power supply 201 of the constant voltage bus 202 uses a high-power programmable DC power supply, and the power output settings and working status can be monitored through remote communication. The heating power of each channel connected to the constant voltage bus 202 is adjusted by the duty cycle of the solid-state sensor 204. The on / off status of the channel power supply is detected by the Hall sensor 205. A fuse 203 is set in the channel circuit. The test system establishes an electrical connection with the heating element 206 and the temperature measurement module 207 through the transmission cable, and establishes control communication with the control center 102 of the test system through the Profinet bus.

[0061] The core of the temperature sensing device is a multi-channel temperature measurement module 207 based on fieldbus protocols such as Modbus RTU. This module is directly installed inside the thermal protection device 107, close to the temperature sensor 108. This "on-site digitization" design allows weak analog temperature signals, such as those from a platinum resistance thermometer 108 (Pt100), to be amplified, linearized, and converted into digital signals locally at the measurement site. These signals are then transmitted to the control cabinet 101 via a highly interference-resistant digital bus, fundamentally overcoming the accuracy attenuation and electromagnetic interference problems caused by long-distance analog signal transmission. This achieves high-fidelity in-situ measurement and remote transmission of temperature signals.

[0062] The integrated transmission device is specifically defined as a customized composite cable. For example... Figure 3 As shown, this cable is not a simple bundle of wires, but rather a synergistic electrical and mechanical design. Internally, it contains multiple pairs of parallel, thick-diameter power supply cores 3001 to carry the high current required for heating and module power supply; simultaneously, it integrates at least one set of communication cores 3002 with an independent shielding layer 3003, employing differential transmission technology for transmitting digital signals such as Modbus and Profinet. Specifically, the shielding layer 3003 uses a silver-plated copper braided mesh with a braiding density of no less than 80%, ensuring communication stability in complex electromagnetic environments. The outermost layer of the cable is reinforced with a high-performance, high- and low-temperature resistant aramid fiber braided sheath 3004, giving it excellent mechanical strength, flexibility, and resistance to embrittlement in extremely low-temperature environments. In a preferred embodiment, the cable uses a "15×2+2×3" configuration, comprising 15 independent power supply circuits, each consisting of a pair of cores 3001, and 2 independent shielded twisted-pair RS-485 communication channels composed of communication cores 3002.

[0063] In some embodiments, the system supports no less than 64 independent heating control channels and no less than 36 independent temperature acquisition channels; the temperature measurement range covers a wide temperature range from -200℃ to +200℃; the maximum heating power of a single channel is no less than 550W to meet the demand for high-intensity heating; and the system temperature control accuracy is better than ±1℃ throughout the entire operating range to ensure the accuracy of the verification data.

[0064] In some embodiments, the output voltage, current limit and other parameters of the programmable DC power supply 201 can not only be set locally, but also remotely set and adjusted by host computer software via the network. Furthermore, its operating voltage, current, temperature, status and other parameters can be remotely monitored and recorded in real time, which facilitates unattended testing and remote fault diagnosis.

[0065] In some embodiments, the host computer software and the lower-level PLC hardware platform communicate via a high-speed, deterministic Profinet industrial Ethernet bus to ensure the real-time and reliable issuance of control commands and the efficient uploading of status data, providing a foundation for complex synchronous control and large-scale data acquisition.

[0066] In this embodiment, the heating system combines a DC power constant voltage bus with solid-state relays, which significantly reduces the number of heating power supplies required, saves control system integration space, reduces device design costs, and improves system integration and power supply reliability. The temperature control strategy described in this invention includes multiple temperature control modes such as open-loop control, closed-loop control, and bypass tracking, meeting the verification requirements of different control modes for multiple heating channels in the protection device. The transmission cable described in this invention adopts a comprehensive cable design, combining the heating element power supply line, temperature sensing element power supply line, and communication line into a single cable, using a "30+2×3" configuration. The 30 cores are for power supply, and the 2×3 cores are two sets of 3-core shielded 485 communication cables, achieving a minimal and compact design of the transmission cable cores. The central hub of the temperature sensing and heating systems described in this invention consists of a PLC, a DIO module, and a Modbus communication module. It receives temperature measurement signals from the temperature sensing system, is controlled by upper-level software, and adjusts the output power of the heating system relays. The system adopts a standardized modular design, possessing strong scalability and compatibility. The thermal protection function verification system for cryogenic devices described in this invention can be applied to verify the correctness of thermal design and acceptance testing of cryogenic ground test equipment, and can also be used to build a convenient temperature control system for field thermal testing.

[0067] This application also provides method embodiments that follow the above embodiments to implement the method steps of the above embodiments. The interpretation of the same names is the same as that of the above embodiments, and they have the same technical effects as those of the above embodiments. They will not be repeated here.

[0068] like Figure 4As shown, this application provides a method for verifying the thermal protection function of a cryogenic device, the method comprising:

[0069] S401. Arrange heating elements and temperature sensors inside the thermal protection device to be tested;

[0070] Within the thermal protection device to be verified, multiple heating elements and platinum resistance temperature sensors are strategically arranged based on its structural characteristics and thermal design verification requirements. The heating elements simulate active thermal protection or external thermal loads, while the temperature sensors monitor the temperature response at key locations within the device in real time. The arrangement of the heating elements and temperature sensors must be representative, reflecting the thermal behavior of the thermal protection device under actual operating conditions.

[0071] S402. Dedicated control and acquisition channels are provided for heating elements and temperature sensors;

[0072] In the system control software, each physically arranged heating element is assigned an independent heating control channel, and each temperature sensor is assigned an independent temperature acquisition channel. This mapping relationship establishes a physical connection between the control logic and the object under test, enabling the host computer software to address and control each independent heating area and to independently acquire and record data at each temperature measurement point.

[0073] S403. Configure temperature control logic for at least one heating channel in independent closed-loop, independent open-loop, or bypass tracking mode via a host computer.

[0074] Through the human-computer interface of the host computer software, users can configure personalized temperature control logic for the heating channels allocated in step S402 according to the verification scheme. The temperature control logic includes, but is not limited to:

[0075] Independent closed-loop control mode: A target temperature value is set for this channel. Based on feedback from the temperature sensor associated with this channel, the system dynamically adjusts the heating power using control algorithms such as PID to stabilize the temperature at the measured point at the set value. This mode is used to verify the steady-state heat preservation performance of the device under set temperature conditions.

[0076] Independent open-loop control mode: A fixed heating power or power variation curve is set for this channel, and the system outputs according to the set value, without relying on temperature feedback for adjustment. This mode is used to simulate constant or programmed heat flow input to verify the device's transient thermal response or protection capabilities under extreme heating conditions.

[0077] Bypass Tracking Mode: Designate another heating channel currently in closed-loop control mode as the tracking source. The system will automatically adjust the heating power setpoint of this channel to follow the actual output power of the tracked channel in real time. This mode is used to simulate the thermal coupling effect between non-actively temperature-controlled areas and adjacent actively temperature-controlled areas in a thermal protection device, verifying the effects of heat diffusion and inter-area thermal interference.

[0078] S404. In low-temperature environments, based on the configured logic and temperature feedback, power control of the heating channels is performed in the corresponding mode, and at least one channel performs bypass tracking mode.

[0079] The configured thermal protection device is placed in a target low-temperature environment, such as -160°C. After the system is started, the control device, according to the configuration in step S403, simultaneously drives multiple heating channels to execute different temperature control modes. Crucially, at least one heating channel in the system is configured to execute a bypass tracking mode, working in parallel with at least one channel executing independent closed-loop or open-loop control. The control device receives feedback signals from the temperature sensing device in real time, and calculates and outputs corresponding control commands to the heating actuators based on the preset logic of each channel. Solid-state power adjustment devices regulate the power of each heating element, thereby achieving complex, multi-condition parallel thermal boundary condition simulation.

[0080] S405. Collect temperature and control data from each channel to verify the performance of the thermal protection device under multi-mode temperature control.

[0081] Throughout the test, the system synchronously collects and records data from all temperature acquisition channels, the control status of each heating channel, and real-time power output data. After the test, various performance analyses can be performed based on the collected time-series data.

[0082] In some embodiments, an active temperature control region and a passive following region are distinguished according to the temperature control logic configuration;

[0083] Simultaneously collect temperature control data and temperature response data from both areas;

[0084] By analyzing the correlation between the data from the two regions, the thermal insulation performance parameters of the thermal protection device and the thermal coupling strength between the regions were determined.

[0085] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0086] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A thermal protection function verification system for cryogenic devices, characterized in that, The system includes: A control device for executing configurable temperature control logic and generating heating control commands; A heating actuator, connected to the control device, is used to respond to the heating control command and provide controllable heating power to the heating element in the heat protection device under test; A temperature sensing device is connected to the control device and is used to collect multi-point temperature signals inside the thermal protection device under test and feed them back to the control device. An integrated transmission device is used to transmit power supply and signals between the control device, the heating actuator, and the temperature sensing device.

2. The system according to claim 1, characterized in that, The control device includes a hardware platform and host computer software built on a programmable logic controller. The host computer software is used to configure temperature control logic for multiple independent heating channels and temperature measurement channels. The temperature control logic includes at least one of independent closed-loop control, independent open-loop control, and bypass tracking mode. The heating execution device includes a programmable DC power supply, a constant voltage bus powered by the programmable DC power supply, and a solid-state power regulating device connected between the constant voltage bus and the heating element.

3. The system according to claim 2, characterized in that, In the heating actuator, a fuse is connected in series in the circuit of each heating channel and a Hall current sensor is provided for detecting the on / off state of the channel.

4. The system according to claim 1, characterized in that, The temperature sensing device includes a platinum resistance temperature sensor and a multi-channel temperature sensing module based on Modbus bus, wherein the multi-channel temperature sensing module is installed inside the thermal protection device.

5. The system according to claim 4, characterized in that, The integrated transmission device is a composite cable, which includes multiple pairs of parallel power supply cores and at least one set of differential communication cores with a shielding layer. The cable is equipped with a low-temperature resistant sheath.

6. The system according to claim 1, characterized in that, The system supports multiple independent heating control channels and multiple independent temperature acquisition channels, with a temperature measurement range covering -200℃ to +200℃. The maximum heating power of a single channel is not less than 550W, and the temperature control accuracy is better than ±1℃.

7. The system according to claim 1, characterized in that, The output voltage of the programmable DC power supply can be set and adjusted remotely, and its operating parameters can be monitored remotely; the hardware of the control device, heating actuator, and temperature sensing device adopts a modular design with standard interfaces.

8. The system according to claim 1, characterized in that, The host computer software communicates with the PLC hardware platform via the Profinet bus.

9. A method for verifying the thermal protection function of a cryogenic device, characterized in that, The method includes: A heating element and a temperature sensor are arranged inside the thermal protection device to be tested; Dedicated control and acquisition channels are provided for heating elements and temperature sensors; Temperature control logic is configured for at least one heating channel using independent closed-loop, independent open-loop, or bypass tracking modes via a host computer. In low-temperature environments, based on the configured logic and temperature feedback, power control of the heating channels is performed in the corresponding mode, and at least one channel performs bypass tracking mode. Collect temperature and control data from each channel to verify the performance of the thermal protection device under multi-mode temperature control.

10. The method according to claim 9, characterized in that, The temperature control logic configuration distinguishes between active temperature control zones and passive temperature following zones; Simultaneously collect temperature control data and temperature response data from both areas; By analyzing the correlation between the data from the two regions, the thermal insulation performance parameters of the thermal protection device and the thermal coupling strength between the regions were determined.

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