A control method for a precision constant temperature test chamber
By using the control method of the precision constant temperature test chamber, the automatic linkage and precise control of temperature and test process are realized, which solves the problems of uneven temperature control and low efficiency of manual operation, and improves the reliability of the test and the accuracy of data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIER LABS EQUIP JIANGSU CO LTD
- Filing Date
- 2025-04-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing test chambers lack segmented control and local thermal stress relief in temperature regulation, which leads to damage to electronic products when the temperature changes suddenly. In addition, the test process relies on manual operation, resulting in low efficiency and large data errors.
The control method of the precision constant temperature test chamber is adopted. Through real-time monitoring by temperature sensors, segmented temperature rise or fall strategy, PLC automatic control, linkage coordination module and data feedback diagnosis module, the temperature and test process are automatically linked and precisely controlled. Buffer material is used to disperse thermal stress. Combined with PID controller and digital bus communication, the temperature uniformity and process stability in the test chamber are ensured.
It achieves precise temperature control and automation of the test process, reduces thermal stress concentration, improves test efficiency and data accuracy, reduces human error, and ensures the reliability and repeatability of the test.
Smart Images
Figure CN120371049B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of temperature control and automated testing technology, specifically a control method for a precision constant temperature test chamber. Background Technology
[0002] Currently, electronic products often face two key problems during use. First, in practical applications, electronic components are made of various materials with significantly different coefficients of thermal expansion. When an electronic product rapidly transitions from a low-temperature environment to a high-temperature environment, sudden temperature changes in localized areas can easily lead to thermal stress concentration, resulting in damage to electronic components, solder joint cracking, and other malfunctions, severely impacting product reliability and lifespan. Traditional test chambers often employ fixed-rate temperature control methods, lacking targeted designs for segmented temperature control and localized thermal stress relief, making it difficult to meet the stringent requirements for temperature stability and uniformity in actual testing.
[0003] Secondly, environmental adaptability testing of electronic products typically involves multiple complex tests, such as temperature cycling, vibration, and electromagnetic compatibility. Existing testing procedures largely rely on manual operation, resulting in inaccurate parameter settings and loose connections between testing stages. Due to the lack of a highly automated control system that enables real-time linkage between testing stages, testing efficiency is low, and errors are easily introduced by human factors, ultimately affecting the accuracy and repeatability of test data.
[0004] Therefore, there is an urgent need for a control method for a precision constant temperature test chamber that organically combines temperature control with the automation of the test process. This would ensure precise connection between each stage of the test while achieving balanced temperature control, thereby improving overall performance. Summary of the Invention
[0005] The purpose of this invention is to provide a control method for a precision constant temperature test chamber to solve the problems mentioned in the background art.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a control method for a precision constant temperature test chamber, wherein the method employs a control system for the precision constant temperature test chamber, including a temperature control module, a test process automation module, a linkage coordination module, and a data feedback diagnostic module, and the control method for the precision constant temperature test chamber includes the following steps: The temperature data inside the test chamber is detected in real time by a temperature sensor and the data is transmitted to the temperature control module. Based on the preset target temperature and the current temperature data, a segmented temperature rise or temperature drop strategy is adopted to achieve automatic switching between low-speed and high-speed temperature change. During temperature changes, the judgment module detects the parameters of the current test process and establishes a parameter linkage formula between temperature and test steps to adjust the temperature control parameters accordingly. The automated test process module automatically executes each test step according to the preset test item sequence and works in conjunction with the temperature control module. The data feedback and diagnostic module collects temperature, vibration, and pressure data in real time, and uses fuzzy logic algorithms to determine anomalies and automatically issue early warning signals. When abnormalities occur in temperature or test procedure, the linkage and coordination module automatically issues adjustment commands to control the temperature control module and the test procedure automation module to adjust synchronously until normal operation is restored.
[0007] According to the above technical solution, the temperature control module is used to precisely regulate the temperature inside the test chamber, and the specific operating steps are as follows: In the initial stage, the temperature data inside the test chamber is monitored in real time using a temperature sensing device; Based on the difference between the preset target temperature and the current temperature, determine whether segmented control is required; Before the temperature approaches the target temperature, heating or cooling is performed at a low rate. When the temperature reaches the preset critical value, it automatically switches to a faster rate for final adjustment. During temperature control, buffer materials are used to disperse the risk of thermal stress concentration. These buffer materials include silicone pads and graphite sheets.
[0008] According to the above technical solution, the automated test process module uses a PLC as the core control unit, and realizes automatic switching and coordinated linkage of multiple test items through a preset program, specifically including: After the test begins, the PLC controller first reads the real-time data transmitted back by the temperature control module and compares it with the preset test process parameters; When the temperature data is within a safe range, the PLC starts the corresponding test items in sequence and achieves seamless switching between the items; During the test, if the temperature or other key parameters exceed the preset tolerance, the PLC will automatically execute the shutdown protection program and send an abnormal status signal to the linkage coordination module.
[0009] According to the above technical solution, the linkage coordination module achieves comprehensive adjustment of multiple parameters by establishing a linkage formula between temperature and test procedure. The main functions of this module are as follows: A parameter linkage formula between temperature and experimental procedures is established, and its algorithm expression is as follows: ;in Indicates the actual temperature. Indicates the target temperature. The time interval for temperature changes. and All are system adjustment coefficients. This is a function of the current experimental step and the error factor; After the test process is started, the linkage and coordination module cross-judges the temperature data and process data in real time. When it finds that the temperature change is mismatched with the test steps or exceeds the preset tolerance, it immediately activates the early warning mechanism, automatically adjusts the temperature change rate and suspends the next test step to ensure the stable operation of the overall test process.
[0010] According to the above technical solution, the data feedback diagnostic module is used to collect, analyze, and provide fault warnings for various data during the test process in real time. The specific measures are as follows: Each module is equipped with an independent data acquisition unit to record temperature, pressure, vibration, and electronic signal parameters in real time. Potential abnormal states are identified through fuzzy logic algorithms, and fault warnings are issued immediately. The data feedback and diagnostic module also includes post-data storage and comparison functions, which facilitates the analysis of the intrinsic relationship between temperature changes and various parameters in the test process, and provides data support for subsequent improvements. The linkage feedback mechanism enables the test chamber to adjust automatically, reducing the risk of overall failure caused by abnormal local parameters.
[0011] According to the above technical solution, the temperature control module adopts an advanced PID controller and combines temperature sensor data for closed-loop regulation, the specific implementation of which includes: The temperature data at different locations inside the test chamber is acquired in real time by a high-precision temperature sensor and transmitted to the central controller. The central controller uses a PID formula based on the set target temperature and temperature change curve. Real-time calculations are performed to determine the output power required for heating or cooling; among which, To control the output, For temperature error, These are the proportional, integral, and differential coefficients, respectively. For the target temperature, The current temperature; The calculation results are fed back to the temperature control actuator to achieve precise control of the heater or cooling system; When the temperature approaches the preset critical value, the system automatically adjusts the PID parameters to ensure that temperature fluctuations are minimized during the temperature rise or fall. At the same time, by comparing temperature data from multiple points, the system ensures that the overall temperature distribution in the test chamber is uniform, thereby achieving a precise constant temperature effect.
[0012] According to the above technical solution, the temperature control module, the test process automation module, the linkage coordination module, and the data feedback diagnostic module are all interconnected and communicate through an internal digital bus. The specific implementation method is as follows: Each module is equipped with an independent digital signal processing unit, which transmits temperature, time, and process status parameters in real time via an internal bus; The bus system is designed with redundant lines and error detection mechanisms, which can automatically switch to the backup line when a single path fails, ensuring the continuity and reliability of data transmission. After receiving data from each module, the linkage and coordination module performs multi-parameter coordinated adjustment according to the preset linkage formula, and feeds back to each module through the digital bus to adjust their respective operating status in real time.
[0013] According to the above technical solution, the control method of the precision constant temperature test chamber further includes a test data storage and report generation step, specifically including: During the test, the temperature, vibration, pressure, humidity and other relevant data collected by each module are processed by the data feedback and diagnostic module and then automatically stored in the central database. Data storage employs time-series recording and segmented archiving techniques to ensure that data from each experimental phase is completely preserved and facilitates subsequent comparative analysis. After the test, the system automatically generates a test report and records the temperature curve, the trend of various parameters, and abnormal warning records during the test. Finally, the test data is statistically analyzed and trends are analyzed according to the preset algorithm, and detailed technical indicators and fault analysis conclusions are output, providing data basis for subsequent test scheme optimization and equipment improvement, and enhancing the transparency and traceability of the overall test.
[0014] According to the above technical solution, the control method of the precision constant temperature test chamber further includes an automated connection step between the preheating and temperature stabilization stages, specifically including: Before the test starts, the system first enters the preheating stage, and the temperature control module slowly raises the temperature of the test chamber to the preset initial temperature at a low rate. After the preheating stage is completed, the system automatically detects whether the temperature of each measuring point in the test chamber has reached the preset equilibrium value. If it has, the system automatically switches to the temperature stabilization stage to keep the temperature within the set range. During the temperature stabilization phase, the temperature control module continuously monitors temperature fluctuations and uses the PID regulation and linkage coordination module to coordinate and adjust the test process to ensure that the temperature inside the test chamber remains stable.
[0015] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: By establishing a mathematical model and feedback algorithm between temperature and experimental procedures, this invention realizes multi-loop regulation of temperature control, process flow, and data feedback. When abnormal temperature or mismatched experimental procedures are detected, the system can respond quickly and automatically adjust the operating status of each module to ensure that the overall system is always in a safe and stable working state. Attached Figure Description
[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart illustrating the control method of the precision constant temperature test chamber of the present invention. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] Please see Figure 1 This invention provides a technical solution: a control method for a precision constant temperature test chamber. This method utilizes the control system of the precision constant temperature test chamber, including a temperature control module, a test process automation module, a linkage coordination module, and a data feedback diagnostic module. The control method for the precision constant temperature test chamber includes the following steps: Step S1: Real-time temperature data inside the test chamber is detected by a temperature sensor and transmitted to the temperature control module; Step S2: Based on the preset target temperature and the current temperature data, adopt a segmented temperature rise or temperature drop strategy to achieve automatic switching between low-speed and high-speed temperature change. Step S3: During the temperature change process, the current test procedure parameters are detected by the judgment module, and a parameter linkage formula between temperature and test steps is established to adjust the temperature control parameters accordingly. Step S4: The test process automation module automatically executes each test step according to the preset test item sequence and works in conjunction with the temperature control module; Step S5: The data feedback and diagnosis module collects temperature, vibration, and pressure data in real time, and uses fuzzy logic algorithm to judge anomalies and automatically issue early warning signals; Step S6: When the temperature or test procedure is abnormal, the linkage and coordination module automatically issues an adjustment command to control the temperature control module and the test procedure automation module to adjust synchronously until normal operation is restored.
[0019] The temperature control module is used to precisely regulate the temperature inside the test chamber. The specific operating steps are as follows: In the initial stage, the temperature data inside the test chamber is monitored in real time using a temperature sensing device; Based on the difference between the preset target temperature and the current temperature, determine whether segmented control is required; Before the temperature approaches the target temperature, heating or cooling is performed at a low rate. When the temperature reaches the preset critical value, it automatically switches to a faster rate for final adjustment. During temperature control, buffer materials are used to disperse the risk of thermal stress concentration. These buffer materials include silicone pads and graphite sheets.
[0020] The automated testing process module uses a PLC as the core control unit, and achieves automatic switching and coordinated operation of various testing items through preset programs, specifically including: After the test begins, the PLC controller first reads the real-time data transmitted back by the temperature control module and compares it with the preset test process parameters; When the temperature data is within a safe range, the PLC starts the corresponding test items in sequence and achieves seamless switching between the items; During the test, if the temperature or other key parameters exceed the preset tolerance, the PLC will automatically execute the shutdown protection program and send an abnormal status signal to the linkage coordination module so as to adjust the test process in a timely manner. This automated test process can be monitored and parameters adjusted in real time through a remote monitoring platform, which improves the flexibility and safety of the test process and reduces the risk of errors caused by manual operation.
[0021] The linkage and coordination module establishes a linkage formula between temperature and the test procedure to achieve comprehensive adjustment of multiple parameters. The main functions of this module are as follows: A parameter linkage formula between temperature and experimental procedures is established, and its algorithm expression is as follows: ;in Indicates the actual temperature. Indicates the target temperature. The time interval for temperature changes. and All are system adjustment coefficients. This is a function of the current experimental step and the error factor; After the test process is started, the linkage and coordination module cross-judges the temperature data and process data in real time. When it finds that the temperature change is mismatched with the test steps or exceeds the preset tolerance, it immediately activates the early warning mechanism, automatically adjusts the temperature change rate and suspends the next test step to ensure the stable operation of the overall test process.
[0022] The data feedback and diagnostic module is used to collect, analyze, and provide fault warnings for various data during the experiment in real time. Specific measures are as follows: Each module is equipped with an independent data acquisition unit to record temperature, pressure, vibration, and electronic signal parameters in real time. Potential abnormal states are identified through fuzzy logic algorithms, and fault warnings are issued immediately. The data feedback and diagnostic module also includes post-data storage and comparison functions, which facilitates the analysis of the intrinsic relationship between temperature changes and various parameters in the test process, providing data support for subsequent improvements; The linkage feedback mechanism enables the test chamber to adjust automatically, reducing the risk of overall failure caused by abnormal local parameters.
[0023] The temperature control module employs an advanced PID controller and combines temperature sensor data for closed-loop regulation. Its specific implementation includes: The temperature data at different locations inside the test chamber is acquired in real time by a high-precision temperature sensor and transmitted to the central controller. The central controller uses a PID formula based on the set target temperature and temperature change curve. Real-time calculations are performed to determine the output power required for heating or cooling; among which, To control the output, For temperature error, These are the proportional, integral, and differential coefficients, respectively. For the target temperature, The current temperature; The calculation results are fed back to the temperature control actuator to achieve precise control of the heater or cooling system; When the temperature approaches the preset critical value, the system automatically adjusts the PID parameters to ensure that temperature fluctuations are minimized during the temperature rise or fall. At the same time, by comparing temperature data from multiple points, the system ensures that the overall temperature distribution in the test chamber is uniform, thereby achieving a precise constant temperature effect.
[0024] The temperature control module, the test process automation module, the linkage coordination module, and the data feedback diagnostic module are all interconnected and communicate via an internal digital bus. The specific implementation method is as follows: Each module is equipped with an independent digital signal processing unit, which transmits temperature, time, and process status parameters in real time via an internal bus; The bus system is designed with redundant lines and error detection mechanisms, which can automatically switch to the backup line when a single path fails, ensuring the continuity and reliability of data transmission. After receiving data from each module, the linkage coordination module performs multi-parameter coordinated adjustment according to the preset linkage formula and feeds back to each module through the digital bus to adjust their respective operating status in real time. Through the above steps, not only is efficient coordination between modules guaranteed, but also the goals of high speed, low latency and high reliability are achieved in the data transmission process. This provides a solid information transmission guarantee for the automated control of the entire test process and effectively prevents test loss of control due to communication failure.
[0025] The control method for precision constant temperature test chambers further includes test data storage and report generation steps, specifically including: During the test, the temperature, vibration, pressure, humidity and other relevant data collected by each module are processed by the data feedback and diagnostic module and then automatically stored in the central database. Data storage employs time-series recording and segmented archiving techniques to ensure that data from each experimental phase is completely preserved and facilitates subsequent comparative analysis. After the test, the system automatically generates a test report and records the temperature curve, the trend of various parameters, and abnormal warning records during the test. Finally, the test data is statistically analyzed and trends are analyzed according to the preset algorithm, and detailed technical indicators and fault analysis conclusions are output, providing data basis for subsequent test scheme optimization and equipment improvement, and enhancing the transparency and traceability of the overall test.
[0026] The control method for precision constant temperature test chambers also includes automated connection steps between the preheating and temperature stabilization stages, specifically including: Before the test starts, the system first enters the preheating stage, and the temperature control module slowly raises the temperature of the test chamber to the preset initial temperature at a low rate. After the preheating stage is completed, the system automatically detects whether the temperature of each measuring point in the test chamber has reached the preset equilibrium value. If it has, the system automatically switches to the temperature stabilization stage to keep the temperature within the set range. During the temperature stabilization phase, the temperature control module continuously monitors temperature fluctuations and uses PID regulation and linkage coordination modules to coordinate and adjust the test process, ensuring that the temperature inside the test chamber remains stable. The seamless connection between the preheating and temperature stabilization phases ensures the continuity of test data and the stability of the test environment, providing a good environment for the smooth progress of subsequent test projects and reducing thermal stress problems caused by temperature fluctuations.
[0027] This application achieves deep integration of temperature control and test process automation by introducing multi-module linkage and coordination technology. In terms of temperature regulation, it adopts a segmented heating (or cooling) strategy and PID closed-loop control, which can accurately control the rate of temperature change and effectively avoid the problem of thermal stress concentration caused by excessive temperature difference, thereby extending the service life of electronic components. In terms of test process, through PLC automated control and remote monitoring, it realizes seamless switching and real-time adjustment between test items, significantly reducing human operation error and improving test efficiency and data accuracy.
[0028] Furthermore, this application achieves multi-loop regulation of temperature control, process flow, and data feedback by establishing a mathematical model and feedback algorithm between temperature and the test procedure. When abnormal temperature or mismatched test steps are detected, the system can respond quickly and automatically adjust the operating status of each module to ensure that the overall system is always in a safe and stable working state. This not only improves the overall reliability of the test but also provides more convincing data support for subsequent reliability assessments of electronic products.
[0029] Example 1: In the environmental adaptability testing of electronic products, the target temperature of the test chamber is set to 80℃. The operator inputs the following parameters through the control interface: Target temperature during the preheating stage: 50℃; Target temperature during the rapid temperature rise phase: 80℃; The temperature control coefficients K1 and K2 are set to 0.5 and 1.2 respectively. The vibration test start time is set when the temperature reaches 55℃; Fault warning thresholds: Temperature fluctuations exceeding ±2℃, vibration deviations exceeding preset range; After the test is started, the temperature control module first raises the temperature from room temperature (approximately 25°C) to 50°C at a low rate. When the temperature reaches 50°C, the linkage coordination module activates according to the formula... Upon detecting that the current temperature and the fact that the vibration test had not yet started in the test procedure, a linkage command was issued to suspend some non-critical loads. Subsequently, the test procedure automation module started the vibration test, while the temperature control module entered the rapid heating phase, raising the temperature from 50℃ to 80℃. Throughout the process, the data feedback and diagnostic module monitored the temperature and vibration data in real time. Once a local temperature anomaly was detected, the linkage coordination module immediately activated the backup cooling program and paused the vibration test, automatically resuming it once the temperature stabilized. Ultimately, all data within the test chamber were within the expected range, the entire test was successfully completed, and the test report data was accurate and highly repeatable.
[0030] Example 2: For thermal stress testing of electronic components, the test chamber is set to cycle through a target temperature between -20℃ and 120℃. Operators pre-set the temperature cycling curve, dwell time at each stage, and test parameters such as vibration and pressure. After system startup, the temperature control module automatically determines whether to use a low-speed or high-speed temperature change scheme based on the difference between the current temperature and the target temperature. The linkage and coordination module compares the temperature change information with the test process parameters in real time, and immediately issues adjustment commands if a temperature difference is detected that does not match the test stage. The data feedback and diagnostic module analyzes each parameter using a fuzzy logic algorithm. When abnormal temperature fluctuations are detected, a compensation algorithm is automatically activated and relevant data is recorded to ensure that the thermal stress of the electronic components remains within a controllable range throughout the entire temperature cycle. Through the linkage of mechanized judgment and automated processes, the problem of thermal stress concentration during the entire temperature cycle test is effectively alleviated, while test efficiency and data reliability are significantly improved.
[0031] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0032] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0033] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0034] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.
Claims
1. A control method for a precision constant temperature test chamber, wherein the method employs the control system of the precision constant temperature test chamber, including a temperature control module, a test process automation module, a linkage coordination module, and a data feedback diagnostic module, characterized in that: The control method for the precision constant temperature test chamber includes the following steps: The temperature data inside the test chamber is detected in real time by a temperature sensor and the data is transmitted to the temperature control module. Based on the preset target temperature and the current temperature data, a segmented temperature rise or temperature drop strategy is adopted to achieve automatic switching between low-speed and high-speed temperature change. During temperature changes, the judgment module detects the parameters of the current test process and establishes a parameter linkage formula between temperature and test steps to adjust the temperature control parameters accordingly. The automated test process module automatically executes each test step according to the preset test item sequence and works in conjunction with the temperature control module. The data feedback and diagnostic module collects temperature, vibration, and pressure data in real time, and uses fuzzy logic algorithms to determine anomalies and automatically issue early warning signals. When the temperature or test procedure is abnormal, the linkage and coordination module automatically issues an adjustment command to control the temperature control module and the test procedure automation module to adjust synchronously until normal operation is restored. The temperature control module is used for precise temperature regulation inside the test chamber. The specific operating steps are as follows: In the initial stage, the temperature data inside the test chamber is monitored in real time using a temperature sensing device; Based on the difference between the preset target temperature and the current temperature, determine whether segmented control is required; Before the temperature approaches the target temperature, heating or cooling is performed at a low rate. When the temperature reaches the preset critical value, it automatically switches to a faster rate for final adjustment. During temperature control, buffer materials are used to disperse the risk of thermal stress concentration. These buffer materials include silicone pads and graphite sheets. The linkage and coordination module establishes a linkage formula between temperature and the test procedure to achieve comprehensive adjustment of multiple parameters. The main functions of this module are as follows: A parameter linkage formula between temperature and experimental procedures is established, and its algorithm expression is as follows: ;in Indicates the actual temperature. Indicates the target temperature. The time interval for temperature changes. and All are system adjustment coefficients. The current experimental step is a function of the error factor; the linkage and coordination module uses the formula... If the current temperature is detected and the vibration test has not yet started, a linkage command is issued to suspend some non-critical loads; and if a local temperature anomaly is detected, the backup cooling program is immediately started through the linkage coordination module and the vibration test is suspended, and will automatically resume after the temperature stabilizes. After the test process is started, the linkage and coordination module cross-judges the temperature data and process data in real time. When it finds that the temperature change is mismatched with the test steps or exceeds the preset tolerance, it immediately activates the early warning mechanism, automatically adjusts the temperature change rate and suspends the next test step to ensure the stable operation of the overall test process. The temperature control module employs an advanced PID controller and combines temperature sensor data for closed-loop regulation. Its specific implementation includes: The temperature data at different locations inside the test chamber is acquired in real time by a high-precision temperature sensor and transmitted to the central controller. The central controller uses a PID formula based on the set target temperature and temperature change curve. Real-time calculations are performed to determine the output power required for heating or cooling; among which, To control the output, For temperature error, These are the proportional, integral, and differential coefficients, respectively. For the target temperature, The current temperature; The calculation results are fed back to the temperature control actuator to achieve precise control of the heater or cooling system; When the temperature approaches the preset critical value, the system automatically adjusts the PID parameters to ensure that temperature fluctuations are minimized during the temperature rise or fall. At the same time, by comparing temperature data from multiple points, the system ensures that the overall temperature distribution in the test chamber is uniform, thereby achieving a precise constant temperature effect.
2. The control method for a precision constant temperature test chamber according to claim 1, characterized in that: The automated test process module uses a PLC as the core control unit, and achieves automatic switching and coordinated operation of various test items through preset programs, specifically including: After the test begins, the PLC controller first reads the real-time data transmitted back by the temperature control module and compares it with the preset test process parameters; When the temperature data is within a safe range, the PLC starts the corresponding test items in sequence and achieves seamless switching between the items; During the test, if the temperature or other key parameters exceed the preset tolerance, the PLC will automatically execute the shutdown protection program and send an abnormal status signal to the linkage coordination module.
3. The control method for a precision constant temperature test chamber according to claim 1, characterized in that: The data feedback diagnostic module is used to collect, analyze, and provide fault warnings for various data during the experiment in real time. The specific measures are as follows: Each module is equipped with an independent data acquisition unit to record temperature, pressure, vibration, and electronic signal parameters in real time. Potential abnormal states are identified through fuzzy logic algorithms, and fault warnings are issued immediately. The data feedback and diagnostic module also includes post-data storage and comparison functions, which facilitates the analysis of the intrinsic relationship between temperature changes and various parameters in the test process, and provides data support for subsequent improvements. The linkage feedback mechanism enables the test chamber to adjust automatically, reducing the risk of overall failure caused by abnormal local parameters.
4. The control method for a precision constant temperature test chamber according to claim 1, characterized in that: The temperature control module, the test process automation module, the linkage coordination module, and the data feedback diagnostic module are all interconnected and communicate via an internal digital bus. The specific implementation method is as follows: Each module is equipped with an independent digital signal processing unit, which transmits temperature, time, and process status parameters in real time via an internal bus; The bus system is designed with redundant lines and error detection mechanisms, which can automatically switch to the backup line when a single path fails, ensuring the continuity and reliability of data transmission. After receiving data from each module, the linkage and coordination module performs multi-parameter coordinated adjustment according to the preset linkage formula, and feeds back to each module through the digital bus to adjust their respective operating status in real time.
5. A control method for a precision constant temperature test chamber according to any one of claims 1-4, characterized in that: The control method for the precision constant temperature test chamber further includes test data storage and report generation steps, specifically including: During the test, the temperature, vibration, pressure, humidity and other relevant data collected by each module are processed by the data feedback and diagnostic module and then automatically stored in the central database. Data storage employs time-series recording and segmented archiving techniques to ensure that data from each experimental phase is completely preserved and facilitates subsequent comparative analysis. After the test, the system automatically generates a test report and records the temperature curve, the trend of various parameters, and abnormal warning records during the test. Finally, the test data is statistically analyzed and trends are analyzed according to the preset algorithm, and detailed technical indicators and fault analysis conclusions are output, providing data basis for subsequent test scheme optimization and equipment improvement, and enhancing the transparency and traceability of the overall test.
6. The control method for a precision constant temperature test chamber according to claim 1, characterized in that: The control method for the precision constant temperature test chamber also includes an automated connection step between the preheating and temperature stabilization stages, specifically including: Before the test starts, the system first enters the preheating stage, and the temperature control module slowly raises the temperature of the test chamber to the preset initial temperature at a low rate. After the preheating stage is completed, the system automatically detects whether the temperature of each measuring point in the test chamber has reached the preset equilibrium value. If it has, the system automatically switches to the temperature stabilization stage to keep the temperature within the set range. During the temperature stabilization phase, the temperature control module continuously monitors temperature fluctuations and uses the PID regulation and linkage coordination module to coordinate and adjust the test process to ensure that the temperature inside the test chamber remains stable.