A temperature and humidity test method and device capable of automatically adjusting PID parameters according to load power variation

Abstract

The present application belongs to the technical field of aging product test equipment, and in particular to a temperature and humidity test method and device for automatically adjusting PID parameters with load power variation, which comprises a temperature and humidity chamber, a load for adjusting the temperature and humidity environment in the temperature and humidity chamber, a temperature and humidity control module, a PID algorithm adjustment module, a load power consumption measurement module, and an alarm module. The load power consumption measurement module is used to collect the power consumption of the load in real time through a power sensor and transmit it to the PID algorithm adjustment module, which generates PID parameters according to the power data. The temperature and humidity control module receives the PID parameters from the PID algorithm adjustment module and controls the working power of the load according to the PID parameters, adjusts the temperature and humidity in the temperature and humidity chamber to the preset value, and dynamically adjusts the PID parameters with the power variation of the load through the adaptive algorithm in the PID algorithm adjustment module, so that the device can adapt to stable operation in various scenarios such as no load, light load, half load, full load, etc.

Description

Technical Field

[0001] This invention belongs to the technical field of aging product testing equipment, specifically relating to a temperature and humidity testing method and equipment that automatically adjusts PID parameters according to changes in load power. Background Technology

[0002] Current temperature and humidity testing equipment used for product aging tests employs PID algorithms for temperature adjustment and maintenance. While the PID (Proportional-Integral-Derivative) parameters in the algorithm are fixed, in real-world applications, especially with high-power loads, the load's own heat significantly impacts the equipment's temperature and humidity control. This can lead to deviations in actual temperature and humidity testing, such as excessive overshoot, prolonged settling times, fluctuating heating and cooling rates, and excessively high or low ramp rates. Furthermore, when the load power exceeds the equipment's capacity, temperature and humidity control may fail, impacting testing efficiency. In different testing modes, the load power also varies, making a single PID parameter unsuitable for loads with varying power. Summary of the Invention

[0003] The present invention aims to provide a temperature and humidity testing method and device that automatically adjusts PID parameters according to load power changes. This method enables dynamic adjustment of the load power of the temperature and humidity testing device, allowing the device to adapt to various scenarios such as no load, light load, half load, and full load. Furthermore, it provides early warning when the load power exceeds the device's capacity, thereby improving testing efficiency and stability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A temperature and humidity testing device is provided that automatically adjusts PID parameters according to load power changes. It includes a temperature and humidity chamber and a load for adjusting the temperature and humidity environment in the chamber, as well as a temperature and humidity control module, a PID algorithm adjustment module, a load power consumption measurement module, and an alarm module. The temperature and humidity control module, the PID algorithm adjustment module, and the load power consumption measurement module are functional circuits for implementing control, algorithm adjustment, and power consumption measurement. The load, PID algorithm adjustment module, and alarm module are electrically connected to the temperature and humidity control module, and the load power consumption measurement module is electrically connected to the PID algorithm adjustment module. The temperature and humidity chamber is equipped with a temperature sensor and a humidity sensor that are electrically connected to the temperature and humidity control module. The load power consumption measurement module is used to collect the power consumption of the load in real time through a power sensor and transmit it to the PID algorithm adjustment module. The PID algorithm adjustment module generates PID parameters based on the power data. The temperature and humidity control module receives the PID parameters from the PID algorithm adjustment module and controls the working power of the load according to the PID parameters to adjust the temperature and humidity in the temperature and humidity chamber to a preset value.

[0005] Preferably, the load includes a heating module, a cooling module, a humidification module, and a dehumidification module. The heating module is used to heat the environment inside the temperature and humidity chamber, the cooling module is used to cool the environment inside the temperature and humidity chamber, the humidification module is used to increase the humidity inside the temperature and humidity chamber, and the dehumidification module is used to dehumidify the environment inside the temperature and humidity chamber.

[0006] Preferably, the PID algorithm adjustment module determines the power consumption threshold of the load. The PID algorithm adjustment module stores the upper and lower power thresholds for each load. When the power consumption data of the load exceeds the upper threshold or falls below the lower threshold, it is determined that the power consumption of the load is abnormal and exceeds the equipment capacity. At this time, a signal is sent to the temperature and humidity control module, which controls the alarm module to issue an alarm and stop the test.

[0007] Preferably, the PID algorithm adjustment module is also used to adjust the PID parameters of the load. When the power consumption data of the load is within the normal range, the PID algorithm adjustment module determines whether adjustment is needed based on the actual load power consumption data. If adjustment is needed, new PID parameters are generated based on the new power consumption.

[0008] Preferably, when adjusting the PID parameters of the load, the PID algorithm adjustment module refers to the temperature and humidity data inside the temperature and humidity chamber. If the temperature and humidity data inside the temperature and humidity chamber has met the standard, and the load power consumption still remains high, the adjusted PID parameters are used to reduce the load power consumption; if the temperature and humidity data inside the temperature and humidity chamber does not meet the standard, the adjusted PID parameters are used to increase the load power.

[0009] Preferably, the PID algorithm adjustment module stores the reference power consumption of the load. When the PID algorithm adjustment module adjusts the PID parameters of the load, it compares the real-time power consumption data of the load with the reference power consumption, calculates the difference, and dynamically adjusts the proportional coefficient, integral coefficient, and derivative coefficient of the PID parameters according to the magnitude and trend of the difference, thereby generating new PID parameters that adapt to the current load power consumption.

[0010] This invention also provides a temperature and humidity testing method that automatically adjusts PID parameters according to changes in load power, implemented based on the aforementioned temperature and humidity testing equipment, characterized in that the method includes: (1) The temperature and humidity testing equipment is powered on and running. The initial value of the PID is loaded through the temperature and humidity control module to control the temperature and humidity chamber. (2) The load of the temperature and humidity testing equipment is powered on and the test begins; (3) The load power consumption measurement module performs real-time measurement of load power consumption; (4) The load power consumption measurement module transmits the load power consumption data to the PID algorithm adjustment module; (5) After receiving the load power consumption data, the PID algorithm adjustment module analyzes the power consumption data; (6) If the power consumption data is abnormal or exceeds the device's capacity, an alarm will be triggered and the test will be stopped; (7) When the power consumption data of the load is within the normal range, determine whether adjustment is needed based on the actual power consumption data of the load. If adjustment is needed, generate new PID parameters based on the new power consumption data. (8) The PID algorithm adjustment module sends the adjusted PID parameters to the temperature and humidity control module; (9) The temperature and humidity control module performs temperature and humidity control according to the new PID parameters; (10) Cycle through steps S300-S900 until the test ends.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The temperature and humidity testing device that automatically adjusts PID parameters according to load power changes includes a temperature and humidity chamber, and is equipped with a load for adjusting the temperature and humidity environment in the chamber, as well as a temperature and humidity control module, a PID algorithm adjustment module, a load power consumption measurement module, and an alarm module. The load power consumption measurement module is used to collect the power consumption of the load in real time through a power sensor and transmit it to the PID algorithm adjustment module. The PID algorithm adjustment module generates PID parameters based on the power data. The temperature and humidity control module receives the PID parameters from the PID algorithm adjustment module and controls the working power of the load according to the PID parameters, adjusting the temperature and humidity in the chamber to a preset value. Through the adaptive algorithm in the PID algorithm adjustment module, the PID parameters are dynamically adjusted according to the power changes of the load, enabling the device to adapt to stable operation in various scenarios such as no load, light load, half load, and full load. Attached Figure Description

[0012] 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 an architecture diagram of the control module of an embodiment of the temperature and humidity testing device of the present invention. Detailed Implementation

[0013] 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.

[0014] In one embodiment, a temperature and humidity testing device is provided that automatically adjusts PID parameters according to changes in load power. This temperature and humidity testing device is used to create a temperature and humidity environment to perform aging tests on electronic products such as circuit boards, SSD memory, and sensors, in order to evaluate the performance and reliability of electronic products under varying temperature and humidity environments.

[0015] Figure 1 This is a hardware architecture diagram of the temperature and humidity testing equipment in this embodiment, as shown below. Figure 1 As shown, the temperature and humidity testing equipment includes a temperature and humidity chamber and a load for regulating the temperature and humidity environment in the chamber. The load includes a heating module, a cooling module, a humidification module, and a dehumidification module. The equipment also includes a temperature and humidity control module, a PID algorithm adjustment module, a load power consumption measurement module, and an alarm module. These modules are used to control the temperature and humidity chamber, measure environmental indicators, measure load power consumption, and provide alarms for operating conditions.

[0016] The heating module in the load can be installed in the temperature and humidity chamber by heating with electric heating wire; the cooling module can be a semiconductor cooling module or a compression cooling module with compression-evaporation-condensation-throttling mode; the humidification module can be an ultrasonic humidifier; the dehumidification module can dehumidify by air exchange, specifically by drawing out humid air with an air pump, drying it with a dryer, and then injecting dry gas into the temperature and humidity chamber.

[0017] The temperature and humidity control module, PID algorithm adjustment module, and load power consumption measurement module are functional circuits used to realize control, algorithm adjustment, and power consumption measurement. They can be set on separate circuit boards or integrated on a single circuit board. The alarm module is an audible and visual alarm. The load, PID algorithm adjustment module, and alarm module are all electrically connected to the temperature and humidity control module, and the load power consumption measurement module is electrically connected to the PID algorithm adjustment module.

[0018] The temperature and humidity control module receives the PID parameters (proportional coefficient, integral coefficient, and derivative coefficient) from the PID algorithm adjustment module and controls the load's operating power based on these parameters to adjust the temperature and humidity inside the chamber to the preset values. The chamber is equipped with temperature and humidity sensors; the measured temperature and humidity values ​​are fed back to the temperature and humidity control module, allowing it to determine whether the temperature and humidity have been adjusted to the preset values.

[0019] The load power consumption measurement module is used to collect real-time power consumption data from the load via power sensors. The heating, cooling, humidifying, and dehumidifying modules are all equipped with power sensors. The load power consumption measurement module uses the collected data to obtain the real-time power of the load and transmits it to the PID algorithm adjustment module. The PID algorithm adjustment module generates PID parameters based on the power data to implement the control strategy. In actual operation, only one or two loads may be operating in the heating, cooling, humidifying, and dehumidifying modules. For example, the heating module may be operating while the cooling module is not; or the heating and humidifying modules may be operating while the cooling and dehumidifying modules are not. The load power consumption measurement module only measures the power of the operating load.

[0020] The PID algorithm adjustment module determines the power consumption threshold of the load and adjusts the parameters.

[0021] The PID algorithm adjustment module stores the upper and lower power thresholds for each load. The upper threshold corresponds to the maximum power consumption of the device, and the lower threshold corresponds to the minimum power consumption for the load to operate normally. When the load power consumption data exceeds the upper threshold or falls below the lower threshold, it is determined that the load power consumption is abnormal and exceeds the device's capacity. At this time, a signal is sent to the temperature and humidity control module, which controls the alarm module to issue an alarm and stop the test.

[0022] When the load power consumption data is within the normal range, the PID algorithm adjustment module determines whether adjustment is needed based on the actual load power consumption data. If adjustment is needed, new PID parameters are generated based on the new power consumption. Specifically, the PID algorithm adjustment module refers to the temperature and humidity data inside the temperature and humidity chamber when adjusting the PID parameters. If the temperature and humidity data inside the chamber are already within the standard range, but the load power consumption remains high, the load power consumption can be reduced; if the temperature and humidity data inside the chamber are not within the standard range, the load power consumption can be increased.

[0023] The PID algorithm adjustment module stores the reference power consumption of the load. When adjusting the load parameters, the PID algorithm adjustment module compares the real-time power consumption data of the load with the reference power consumption, calculates the difference, and dynamically adjusts the proportional coefficient, integral coefficient, and derivative coefficient of the PID parameters according to the magnitude and trend of the difference, so as to generate new PID parameters that are adapted to the current load power consumption, ensuring that the load power consumption is not excessive or too low.

[0024] By using a PID algorithm adjustment module based on the load power consumption and the temperature and humidity values ​​inside the temperature and humidity chamber, the temperature and humidity adjustments are made more accurate during actual operation of the temperature and humidity test. This avoids situations such as excessive overshoot, excessively long adjustment time, fluctuations in the heating and cooling rates, and excessively high or low heating and cooling slopes, ensuring that the temperature and humidity testing equipment can always operate normally.

[0025] In one embodiment, a temperature and humidity testing method is provided that automatically adjusts PID parameters according to load power variations. This testing method is based on the aforementioned temperature and humidity testing equipment. (See reference...) Figure 1 The testing method includes the following steps: The S100 temperature and humidity testing equipment is powered on and running. The temperature and humidity control module loads the initial PID values ​​to control the temperature and humidity chamber.

[0026] The S200 temperature and humidity testing equipment is powered on and running, and the test begins.

[0027] The S300 load power consumption measurement module performs real-time measurement of load power consumption.

[0028] The S400 load power consumption measurement module transmits the load power consumption data to the PID algorithm adjustment module.

[0029] After receiving the load power consumption data, the S500 and PID algorithm adjustment module analyze the power consumption data.

[0030] S600: If the power consumption data is abnormal or exceeds the device's capacity, an alarm will be triggered and the test will be stopped.

[0031] S700: When the load power consumption data is within the normal range, determine whether adjustment is needed based on the actual load power consumption data. If adjustment is needed, generate new PID parameters based on the new power consumption situation.

[0032] The S800 PID algorithm adjustment module sends the adjusted PID parameters to the temperature and humidity control module.

[0033] The S900 temperature and humidity control module uses new PID parameters to control temperature and humidity.

[0034] S1000, cycle through steps S300-S900 until the test ends.

[0035] During testing, the temperature and humidity control module acquires the test program, which records the product's aging test process, such as maintaining the adjusted temperature and humidity for a certain period of time. The initial PID value is set according to the temperature and humidity environment to be created during testing, and the corresponding load is activated based on the required temperature and humidity environment. For example, if heating is required, the heating module is activated; if humidification is required, the humidification module is activated.

[0036] During the testing process, the PID parameters are adjusted as follows: After the device powers on, the default initial PID parameters K0 (P0=10, I0=160, D0=5) are loaded. At the start of the load test, the power is at full load. The load power consumption measurement module obtains the load power consumption as P1 (3000W) and sends the load power consumption value to the PID algorithm adjustment module. The PID algorithm adjustment module receives the power consumption value, determines that it is normal power consumption, and that the temperature and humidity values ​​meet the standards, so the PID parameters need to be adjusted. The PID algorithm adjustment module generates a new PID parameter K1 (P1=12, I1=150, D1=8) and sends the parameter value K1 to the temperature and humidity control module. The temperature and humidity control module controls the operation of the temperature and humidity chamber according to the parameter K1. The above steps are repeated.

[0037] This method uses an adaptive algorithm in the PID algorithm adjustment module to dynamically adjust the PID parameters according to the power changes of the load, enabling the equipment to operate stably under various scenarios such as no-load, light-load, half-load, and full-load.

[0038] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature and humidity testing device that automatically adjusts PID parameters according to changes in load power, characterized in that: It includes a temperature and humidity chamber and is equipped with a load for regulating the temperature and humidity environment in the chamber, as well as a temperature and humidity control module, a PID algorithm adjustment module, a load power consumption measurement module, and an alarm module. The temperature and humidity control module, the PID algorithm adjustment module, and the load power consumption measurement module are functional circuits used to realize control, algorithm adjustment, and power consumption measurement. The load, PID algorithm adjustment module, and alarm module are electrically connected to the temperature and humidity control module, and the load power consumption measurement module is electrically connected to the PID algorithm adjustment module. The temperature and humidity chamber is equipped with a temperature sensor and a humidity sensor that are electrically connected to the temperature and humidity control module. The load power consumption measurement module is used to collect the power consumption of the load in real time through a power sensor and transmit it to the PID algorithm adjustment module. The PID algorithm adjustment module generates PID parameters based on the power data. The temperature and humidity control module receives the PID parameters from the PID algorithm adjustment module and controls the working power of the load according to the PID parameters to adjust the temperature and humidity in the temperature and humidity chamber to a preset value.

2. The temperature and humidity testing device that automatically adjusts PID parameters according to load power variations as described in claim 1, characterized in that: The load includes a heating module, a cooling module, a humidification module, and a dehumidification module. The heating module is used to heat the environment inside the temperature and humidity chamber, the cooling module is used to cool the environment inside the temperature and humidity chamber, the humidification module is used to increase the humidity inside the temperature and humidity chamber, and the dehumidification module is used to dehumidify the environment inside the temperature and humidity chamber.

3. The temperature and humidity testing device that automatically adjusts PID parameters according to load power variations as described in claim 1, characterized in that: The PID algorithm adjustment module determines the power consumption threshold of the load. The PID algorithm adjustment module stores the upper and lower power thresholds for each load. When the power consumption data of the load exceeds the upper threshold or falls below the lower threshold, it is determined that the power consumption of the load is abnormal and exceeds the equipment capacity. At this time, a signal is sent to the temperature and humidity control module, which controls the alarm module to issue an alarm and stop the test.

4. The temperature and humidity testing device that automatically adjusts PID parameters according to load power variations as described in claim 3, characterized in that: The PID algorithm adjustment module is also used to adjust the PID parameters of the load. When the power consumption data of the load is within the normal range, the PID algorithm adjustment module determines whether adjustment is needed based on the actual power consumption data of the load. If adjustment is needed, new PID parameters are generated based on the new power consumption.

5. The temperature and humidity testing device that automatically adjusts PID parameters according to load power variations as described in claim 4, characterized in that: When adjusting the PID parameters of the load, the PID algorithm adjustment module refers to the temperature and humidity data inside the temperature and humidity chamber. If the temperature and humidity data inside the temperature and humidity chamber has met the standard, and the load power consumption is still maintained at a high level, the adjusted PID parameters are used to reduce the load power consumption; if the temperature and humidity data inside the temperature and humidity chamber does not meet the standard, the adjusted PID parameters are used to increase the load power.

6. The temperature and humidity testing device that automatically adjusts PID parameters according to load power variations as described in claim 5, characterized in that: The PID algorithm adjustment module stores the reference power consumption of the load. When adjusting the PID parameters of the load, the PID algorithm adjustment module compares the real-time power consumption data of the load with the reference power consumption, calculates the difference, and dynamically adjusts the proportional coefficient, integral coefficient, and derivative coefficient of the PID parameters according to the magnitude and trend of the difference, thereby generating new PID parameters that adapt to the current load power consumption.

7. A temperature and humidity testing method that automatically adjusts PID parameters according to load power variations, implemented based on the temperature and humidity testing equipment described in claim 6, characterized in that... The method includes: (1) The temperature and humidity testing equipment is powered on and running. The initial value of the PID is loaded through the temperature and humidity control module to control the temperature and humidity chamber. (2) The load of the temperature and humidity testing equipment is powered on and the test begins; (3) The load power consumption measurement module performs real-time measurement of load power consumption; (4) The load power consumption measurement module transmits the load power consumption data to the PID algorithm adjustment module; (5) After receiving the load power consumption data, the PID algorithm adjustment module analyzes the power consumption data; (6) If the power consumption data is abnormal or exceeds the device's capacity, an alarm will be triggered and the test will be stopped; (7) When the power consumption data of the load is within the normal range, determine whether adjustment is needed based on the actual power consumption data of the load. If adjustment is needed, generate new PID parameters based on the new power consumption data. (8) The PID algorithm adjustment module sends the adjusted PID parameters to the temperature and humidity control module; (9) The temperature and humidity control module performs temperature and humidity control according to the new PID parameters; (10) Cycle through steps S300-S900 until the test ends.

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