Intelligent temperature and humidity control method and system for fast temperature change test box

Abstract

The invention relates to the technical field of environmental parameter control, in particular to an intelligent temperature and humidity control method and system for a fast temperature change test box. The method comprises the following steps: acquiring an environmental parameter value in a test box within a preset time period before a current moment to determine a trend value of the environmental parameter value at the current moment; according to the magnitude relationship between the trend value of the current moment and a preset trend threshold value, respectively determining weight values of different moments relative to the current moment in a preset time period so as to carry out weighted average on the environmental parameter values of the different moments in the preset time period; taking the difference value between the target value of the environmental parameter value and the weighted average result as first adjusting quantity information; and adjusting an operation parameter value of an environmental parameter control module of the test box according to the first adjustment quantity information, so that the environmental parameter control module controls an environmental parameter value in the test box. By means of the technical scheme, more accurate control over the environmental parameter values in the test box can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of environmental parameter control, and in particular to an intelligent temperature and humidity control method and system for a rapid temperature change test chamber. Background Art

[0002] The rapid temperature change test chamber is referred to as the rapid temperature change test chamber. The rapid temperature change test chamber is an environmental simulation test equipment, which is mainly used to simulate the environment in which the product undergoes rapid temperature changes in a short period of time, so as to detect the performance and reliability of the product under the condition of rapid temperature changes. For example, the temperature inside the test chamber can be adjusted through the temperature adjustment component; the test chamber can also quickly adjust the humidity inside the test chamber through the humidity adjustment component to test the performance and reliability of the product under the condition of rapid humidity changes.

[0003] In order to control the temperature and humidity inside the test chamber, in the relevant technology, for example, in the Chinese patent application document with publication number CN117772296A, a constant temperature and humidity test chamber and its control method are provided, including: a main control module, a temperature and humidity detection module, a heating module, a refrigeration module, a humidification module and a dehumidification module. The constant temperature and humidity test chamber is initialized to obtain the set test temperature and test humidity; the temperature in the constant temperature and humidity test chamber is adjusted to the test temperature, and the humidity in the constant temperature and humidity test chamber is adjusted to the test humidity; the test sample is placed in the constant temperature and humidity test chamber for heat compensation; the temperature in the constant temperature and humidity test chamber is maintained at the test temperature, and the humidity in the constant temperature and humidity test chamber is maintained at the test humidity.

[0004] When the temperature or humidity in the test chamber is adjusted using the temperature adjustment component or the humidity adjustment component in the test chamber, there is a lag in the perception of the change in temperature or humidity in the test chamber, making it difficult to achieve accurate adjustment of the temperature or humidity in the test chamber. Summary of the invention

[0005] In order to overcome the problem in the related art that it is difficult to achieve accurate regulation of the temperature or humidity in a test chamber, the present application provides an intelligent temperature and humidity control method and system for a fast temperature change test chamber.

[0006] According to the first aspect of the embodiment of the present application, there is provided a method for intelligent temperature and humidity control of a fast temperature change test chamber, including: obtaining the environmental parameter value inside the test chamber within a preset time period before the current moment, so as to determine the trend value of the environmental parameter value at the current moment; the trend value is used to characterize the rate of change of the environmental parameter value within the preset time period, and the environmental parameter value is any one of a temperature value and a humidity value; according to the relationship between the trend value at the current moment and the preset trend threshold, respectively determine the weight values ​​of different moments within the preset time period relative to the current moment; using the weight values ​​corresponding to different moments within the preset time period, weighted averaging the environmental parameter values ​​at different moments within the preset time period, and taking the difference between the target value of the environmental parameter value and the weighted average result as the first adjustment amount information; adjusting the operating parameter value of the environmental parameter control module of the test chamber according to the first adjustment amount information, so that the environmental parameter control module controls the environmental parameter value inside the test chamber.

[0007] In this way, the trend value of the environmental parameter value at the current moment is determined, and based on the size relationship between the trend value at the current moment and the preset trend threshold, the weight values ​​of different moments in the preset time period before the current moment relative to the current moment are determined to obtain the first adjustment quantity information, and the weight values ​​at different moments are determined based on the trend value of the environmental parameter value, so that the first adjustment quantity information can not only comprehensively consider the size of the environmental parameter value in the preset time period, but also consider the changing trend of the environmental parameter value. The first adjustment quantity information is used to adjust the operating parameter value of the environmental parameter control module of the test box, and the operating parameter value of the environmental parameter control module can adapt to the changes in the environmental parameter value, thereby achieving more precise control of the environmental parameter value in the test box.

[0008] Optionally, the trend value of the environmental parameter value at the current moment is determined by: , k is the trend value of the environmental parameter value at the current moment, n is the number of moments in the preset time period, as well as are the environmental parameter values ​​of the interior of the test chamber at the jth and j+1th moments within the preset time period, as well as They are the maximum and minimum values ​​of the environmental parameters inside the test chamber within the preset time period. as well as They are respectively the timestamp information corresponding to the latest time and the earliest time in the preset time period.

[0009] In this way, comparing the environmental parameter values ​​inside the test box at adjacent moments within a preset time period can better reflect the actual adjustment speed of the environmental parameter values ​​inside the test box within the preset time period. Therefore, the trend value of the environmental parameter value at the current moment can better characterize the rate of change of the environmental parameter value within the preset time period.

[0010] Optionally, based on the relationship between the trend value at the current moment and the preset trend threshold, the weight values ​​of different moments within the preset time period relative to the current moment are determined respectively, including: when the trend value at the current moment is greater than the preset trend threshold, based on the time interval between the current moment and the target moment, a weight value negatively correlated with the time interval is determined; the target moment is any moment within the preset time period; when the trend value at the current moment is less than or equal to the preset trend threshold, the weight value of the target moment is determined based on the ratio of the first standard deviation to the second standard deviation; the first standard deviation is the standard deviation of the environmental parameter values ​​in the time period composed of other moments within the preset time period except the target moment, and the second standard deviation is the standard deviation of the environmental parameter values ​​within the preset time period.

[0011] In this way, according to the relationship between the trend value at the current moment and the preset trend threshold, the weight value relative to the current moment can be adaptively set for different moments within the preset time period, so as to use the weight value to perform weighted summation of the environmental parameter values ​​at different moments within the preset time period.

[0012] Optionally, when the trend value at the current moment is greater than a preset trend threshold, a weight value negatively correlated with the time interval is determined based on the time interval between the current moment and the target moment, including: taking the inverse of the time interval between the current moment and the target moment as the weight value corresponding to the target moment.

[0013] In this way, by taking the inverse of the time interval between the current moment and the target moment as the weight value corresponding to the target moment, a larger weight value can be set for the historical moments closer to the current moment, so as to increase the contribution of the environmental parameter values ​​close to the current moment to the prediction process of the environmental parameter values ​​of future moments of the current moment.

[0014] Optionally, the operating parameter value of the environmental parameter control module of the test chamber is adjusted according to the first adjustment quantity information, including: determining the second adjustment quantity information according to the first adjustment quantity information and a preset correspondence, the preset correspondence being used to characterize the correspondence between different first adjustment quantity information and different second adjustment quantities; determining the operating parameter value of the environmental parameter control module at the next moment after the current moment according to the second adjustment quantity information and the operating parameter value of the environmental parameter control module at the current moment.

[0015] In this way, since the first adjustment amount is determined based on the environmental parameter value inside the test chamber within a preset time period, the first adjustment amount can better match the adjustment amount required to adjust the ambient temperature value inside the test chamber. The second adjustment amount information is determined based on the first adjustment amount information and the preset correspondence. Based on the second adjustment amount information and the operating parameter value of the environmental parameter control module at the current moment, more precise regulation of the environmental parameter value can be achieved, so as to better complete the performance testing of the product to be tested in the test chamber at different temperatures.

[0016] Optionally, when the environmental parameter value is a temperature value, the environmental parameter control module is a temperature adjustment module, and the operating parameter value includes an adjustment power for the temperature value inside the test box.

[0017] Optionally, when the environmental parameter value is a humidity value, the environmental parameter control module is a humidity adjustment module, and the operating parameter value includes an adjustment power for the humidity value inside the test box.

[0018] Optionally, the preset trend threshold is determined in the following manner: separately determining the trend values ​​at different times within the preset time period, and determining the maximum trend value and the minimum trend value from multiple trend values ​​at different times within the corresponding preset time period; and taking the average of the maximum trend value and the minimum trend value as the preset trend threshold.

[0019] In this way, since the trend value can reflect the rate of change of the environmental parameter value within a period of time before a certain moment, the average of the maximum trend value and the minimum trend value is used as the preset trend threshold. In combination with the actual situation of the environmental parameter value inside the test chamber, a more matching preset trend threshold can be adaptively determined.

[0020] According to the second aspect of the embodiment of the present application, there is provided an intelligent temperature and humidity control system for a rapid temperature change test chamber, comprising: a processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the steps of the intelligent temperature and humidity control method for a rapid temperature change test chamber provided in the first aspect of the present application are implemented.

[0021] The technical solution provided by the embodiments of the present application may include the following beneficial effects: determining the trend value of the environmental parameter value at the current moment, and determining the weight values ​​of different moments in a preset time period before the current moment relative to the current moment based on the size relationship between the trend value at the current moment and the preset trend threshold value, so as to obtain first adjustment quantity information, and the weight values ​​at different moments are determined based on the trend value of the environmental parameter value, so that the first adjustment quantity information can not only comprehensively consider the size of the environmental parameter value within the preset time period, but also consider the changing trend of the environmental parameter value, and use the first adjustment quantity information to adjust the operating parameter value of the environmental parameter control module of the test box, and the operating parameter value of the environmental parameter control module can adapt to the changes in the environmental parameter value, thereby achieving more precise control of the environmental parameter value in the test box.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 is a flow chart of an intelligent temperature and humidity control method for a rapid temperature change test chamber according to an exemplary embodiment; Figure 2 The present invention is a schematic structural diagram of an intelligent temperature and humidity control system of a rapid temperature change test chamber according to an exemplary embodiment. DETAILED DESCRIPTION

[0025] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0026] First, the application scenario of the embodiment of the present application is briefly introduced. In the application scenario of the present application, in order to test the performance and reliability of the product to be tested under rapid humidity or changing conditions, an environmental parameter control module can be used to realize the regulation of the environmental parameter value in the test chamber. For example, the environmental parameter value can be a temperature value or a humidity value. The temperature value in the test chamber can be adjusted by the temperature adjustment module, and the humidity value in the test chamber can be adjusted by the humidity adjustment module.

[0027] However, when the temperature or humidity value in the test chamber is regulated, it is mainly based on the temperature or humidity value in the test chamber at the current moment, making it difficult for the temperature or humidity to be regulated to adapt to changes in the temperature value.

[0028] For example, when the environment in the test chamber is heated and the temperature value has not reached the target temperature value, based on the temperature value of the environment in the test chamber at the current moment, if the temperature is adjusted with a larger adjustment power, the temperature value may exceed the target temperature value; if the temperature value is adjusted with a smaller adjustment power, the ambient temperature value in the test chamber may require a longer adjustment time, affecting the test effect of the performance of the product to be tested under rapid temperature changes.

[0029] In view of the above technical problems, the present application provides an intelligent temperature and humidity control method and system for a fast temperature change test chamber. Figure 1 is a flow chart of a method for intelligent temperature and humidity control of a rapid temperature change test chamber according to an exemplary embodiment. Figure 1 As shown, the method includes the following steps.

[0030] In step S101, the environmental parameter values ​​inside the test chamber within a preset time period before the current moment are obtained to determine the trend value of the environmental parameter value at the current moment.

[0031] The environmental parameter value is either a temperature value or a humidity value; at least one temperature sensor and at least one humidity sensor may be provided inside the test chamber, so that the temperature value of the internal environment of the test chamber is periodically obtained through the temperature sensor, and the humidity value of the internal environment of the test chamber is periodically obtained through the humidity sensor.

[0032] The temperature control module can be used to control the temperature of the internal environment of the test chamber, such as heating or cooling the internal environment of the test chamber; the humidity control module can be used to control the humidity of the internal environment of the test chamber, such as humidifying or dehumidifying the internal environment of the test chamber.

[0033] The environmental parameter values ​​inside the test chamber within a preset time period before the current moment can reflect the level of the environmental parameter values ​​inside the test chamber within a certain period of time before the current moment, and can reflect the changing trend of the environmental parameter values ​​inside the test chamber. For example, it can help determine the actual adjustment effect of the temperature adjustment module on the temperature value of the internal environment of the test chamber, or can help determine the actual adjustment effect of the humidity adjustment module on the humidity value of the internal environment of the test chamber.

[0034] The trend value is used to characterize the rate of change of the environmental parameter value within a preset time period; the larger the trend value at the current moment, the greater the rate of change of the environmental parameter value inside the test chamber in the period before the current moment, and the more obvious the adjustment effect of the environmental parameter control module on the environmental parameter value inside the test chamber in the past period of time.

[0035] On the contrary, the smaller the trend value at the current moment, the smaller the rate of change of the internal environmental parameter value of the test box in the period before the current moment, and the smaller the adjustment effect of the environmental parameter control module on the internal environmental parameter value of the test box in the past period.

[0036] The duration of the preset time period can be set according to actual needs. For example, the duration of the preset time period can be between 10 seconds and 20 seconds. For example, when the current time is 10:00:00, the preset time period can be the time period from 09:59:50 to 10:00:00.

[0037] In one embodiment, the trend value of the environmental parameter value at the current moment is determined by: , k is the trend value of the environmental parameter value at the current moment, n is the number of moments in the preset time period, as well as are the environmental parameter values ​​of the interior of the test chamber at the jth and j+1th moments within the preset time period, as well as They are the maximum and minimum values ​​of the environmental parameters inside the test chamber within the preset time period. as well as They are respectively the timestamp information corresponding to the latest time and the earliest time in the preset time period.

[0038] Determining the trend value of the environmental parameter value at the current moment helps predict the changes in the environmental parameter value inside the test chamber in future time periods, so that corresponding preventive measures can be taken before the environmental parameter value exceeds the set range to maintain the continuity of the change of the environmental parameter value inside the test chamber.

[0039] When the environmental parameter values ​​inside the test chamber are controlled by the environmental parameter control module, for example, the temperature value inside the test chamber is increased by the heating component, and the temperature value inside the test chamber rises at a certain rate; or the humidity value inside the test chamber is increased by the humidifying component, and the humidity value inside the test chamber rises at a certain rate.

[0040] By determining the change in the environmental parameter values ​​inside the test box between two adjacent moments, the changing speed of the environmental parameter values ​​inside the test box at a certain moment can be reflected. When the adjustment direction of the environmental parameter values ​​is determined, the changing speed of the environmental parameter values ​​inside the test box at different moments in the preset time period can be used to reflect the changing speed of the environmental parameter values ​​inside the test box within the preset time period.

[0041] The rate of change of the environmental parameter values ​​inside the test box within a preset time period can affect the environmental parameter values ​​inside the test box at the next moment from the current moment. Therefore, by determining the trend value of the environmental parameter values ​​at the current moment, it is helpful to more accurately adjust the environmental parameter values ​​inside the test box at different moments in the future time period.

[0042] Since the adjustment direction of the environmental parameter values ​​inside the test box is the same within the same time period, the difference between the maximum environmental parameter values ​​at different times within the preset time period and the minimum environmental parameter values ​​at different times within the preset time period can reflect the adjustment amount of the environmental parameter values ​​inside the test box within the preset time period.

[0043] The latest time in the preset time period refers to the time in the preset time period with the smallest time interval from the current time; the earliest time in the preset time period refers to the time in the preset time period with the largest time interval from the current time.

[0044] The difference between the timestamp information corresponding to the latest moment in the preset time period and the timestamp information corresponding to the earliest moment in the preset time period is equal to the length of the preset time period; dividing the adjustment amount of the internal environmental parameter value of the test box within the preset time period by the length of the preset time period can reflect the overall adjustment rate of the internal environmental parameter value of the test box within the preset time period.

[0045] In this way, comparing the environmental parameter values ​​inside the test box at adjacent moments within a preset time period can better reflect the actual adjustment speed of the environmental parameter values ​​inside the test box within the preset time period. Therefore, the trend value of the environmental parameter value at the current moment can better characterize the rate of change of the environmental parameter value within the preset time period.

[0046] In step S102, according to the magnitude relationship between the trend value at the current moment and the preset trend threshold, the weight values ​​of different moments in the preset time period relative to the current moment are determined respectively.

[0047] When using a test chamber to test the performance and reliability of a product under conditions of rapid temperature or humidity changes, a corresponding temperature change curve or humidity change curve is usually specified to better implement the performance or reliability experiment of the product at different temperatures.

[0048] The temperature variation curve may include the corresponding relationship between different time and different temperature values; the humidity variation curve may include the corresponding relationship between different time and different humidity values.

[0049] In order to make the actual environmental parameter values ​​inside the test chamber at different times match the expected environmental parameter values, if the operating parameter values ​​of the environmental parameter control module at the next moment are adjusted directly according to the environmental parameter values ​​of the test chamber at the current moment, the adjustment process of the environmental parameter values ​​has a lag, resulting in low adjustment accuracy for the environmental parameter values, making it difficult to make the actual environmental parameter values ​​inside the test chamber at different times match the expected environmental parameter values ​​at different times.

[0050] Therefore, it is necessary to determine the weight values ​​relative to the current moment for different moments within the preset time period, so as to use the weight values ​​and environmental parameter values ​​at different moments within the preset time period to predict the environmental parameter values ​​at future moments, thereby more accurately adjusting the environmental parameter values ​​at future moments.

[0051] When the trend value at the current moment is greater than the preset trend threshold, it means that the adjustment speed of the internal environmental parameter values ​​of the test chamber is faster in the preset time period before the current moment. If the environmental parameter control module continues to adjust the environmental parameter values ​​according to the operating parameter values ​​in the preset time period, in the future time period after the current moment, the change speed of the internal environmental parameter values ​​of the test chamber will most likely continue the faster change speed in the preset time period.

[0052] When the trend value at the current moment is less than or equal to the preset trend threshold, it means that the adjustment speed of the internal environmental parameter value of the test chamber is slow during the preset time period before the current moment. This slower adjustment speed may be due to the internal environmental parameter value of the test chamber reaching the environmental parameter value that matches the operating parameter value of the environmental parameter control module.

[0053] If the environmental parameter control module continues to adjust the environmental parameter values ​​according to the operating parameter values ​​within the preset time period, in the future time period after the current moment, the change speed of the environmental parameter values ​​inside the test chamber will most likely continue the change speed within the preset time period.

[0054] Therefore, according to the size relationship between the trend value at the current moment and the preset trend threshold, the relationship between the actual adjustment speed of the internal environmental parameter value of the test box and the preset adjustment speed can be reflected, thereby allocating corresponding weight values ​​to different moments in the preset time period.

[0055] In one embodiment, the preset trend threshold is determined in the following manner: respectively determine the trend values ​​at different times within the preset time period, and determine the maximum trend value and the minimum trend value from the multiple trend values ​​at different times within the corresponding preset time period; and use the average value of the maximum trend value and the minimum trend value as the preset trend threshold.

[0056] By referring to the method of determining the trend value at the current moment, the trend values ​​at different moments within the preset time period can be determined respectively; through the trend values ​​at different moments within the preset time period, the change rates of the internal environmental parameter values ​​of the test box at different moments within the preset time period can be respectively characterized.

[0057] In this way, since the trend value can reflect the rate of change of the environmental parameter value within a period of time before a certain moment, the average of the maximum trend value and the minimum trend value is used as the preset trend threshold. In combination with the actual situation of the environmental parameter value inside the test chamber, a more matching preset trend threshold can be adaptively determined.

[0058] In one embodiment, the weight values ​​of different moments within the preset time period relative to the current moment are determined based on the relationship between the trend value at the current moment and the preset trend threshold, including: when the trend value at the current moment is greater than the preset trend threshold, the weight value negatively correlated with the time interval is determined based on the time interval between the current moment and the target moment; the target moment is any moment within the preset time period; when the trend value at the current moment is less than or equal to the preset trend threshold, the weight value of the target moment is determined based on the ratio of the first standard deviation to the second standard deviation; the first standard deviation is the standard deviation of the environmental parameter value in the time period composed of other moments in the preset time period except the target moment, and the second standard deviation is the standard deviation of the environmental parameter value in the preset time period.

[0059] When the trend value at the current moment is greater than the preset trend threshold, it means that the actual adjustment rate of the internal environmental parameter value of the test chamber within the preset time period is large; compared with historical moments with a longer time interval from the current moment, the environmental parameter value of the historical moment closer to the current moment has a greater impact on the environmental parameter value of the next moment after the current moment.

[0060] Therefore, when the trend value at the current moment is greater than the preset trend threshold, a weight value negatively correlated with the time interval can be determined based on the time interval between the current moment and the target moment, thereby increasing the weights of other moments close to the current moment within the preset time period, and reducing the weights of other moments within the preset time period that are closer to the current moment, so as to better realize the prediction of the environmental parameter values ​​inside the test chamber at the next moment after the current moment.

[0061] When the trend value at the current moment is less than or equal to the preset trend threshold, it means that the ambient temperature value inside the test chamber is relatively stable during the preset time period before the current moment; when the ambient temperature value inside the test chamber is relatively stable during the preset time period, the standard deviation of the environmental parameter value during the preset time period is small.

[0062] The first standard deviation is the standard deviation of the environmental parameter values ​​in the time period composed of other moments in the preset time period except the target moment, and the second standard deviation is the standard deviation of the environmental parameter values ​​in the preset time period; when the ambient temperature value inside the test chamber is relatively stable in the preset time period, if the second standard deviation is greater than or equal to the first standard deviation, it means that the environmental parameter values ​​in the time period composed of other moments in the preset time period except the target moment are more stable.

[0063] If the second standard deviation is greater than or equal to the first standard deviation, it means that the difference between the environmental parameter value at the target time and the overall environmental parameter value within the preset time period is large, and a sudden abnormal event may have occurred in the test chamber. This sudden abnormal event may end quickly after it occurs. Therefore, the ratio between the first standard deviation and the second standard deviation helps to avoid the impact of possible sudden abnormal events on the prediction results.

[0064] For example, the test chamber is abnormally opened during the heating process, causing heat loss, or the test chamber is abnormally opened during the cooling process, causing the noise and abnormal temperature rise, so that the temperature sensor detects a temperature value that is significantly different from the temperature value of the test chamber environment, and the test chamber is quickly closed after being abnormally opened, and the temperature monitored by the temperature sensor returns to the ambient temperature value inside the test chamber.

[0065] When the trend value at the current moment is less than or equal to the preset trend threshold, the weight value at the target moment is determined according to the ratio of the first standard deviation to the second standard deviation; for example, the ratio of the first standard deviation to the second standard deviation can be normalized, and the ratios at different moments within the corresponding preset time period can be normalized to the range of 0 to 1, so as to facilitate comparison of weight values ​​at different moments.

[0066] If the second standard deviation is smaller than the first standard deviation corresponding to the target moment, it means that when the environmental parameter value at the target moment is not considered, the standard deviation of the environmental parameter values ​​in the time period composed of other moments except the target moment is larger, the environmental parameter value at the target moment is a relatively stable environmental parameter value within the preset time period, the environmental parameter value corresponding to the target moment is more common among the multiple environmental parameter values ​​within the preset time period, and the target moment has no significant impact on the stability of the environmental parameter value. Therefore, through the ratio between the first standard deviation and the second standard deviation which is smaller than the first standard deviation, a larger weight value can be assigned to the target moment, and a higher weight value can be assigned to the environmental parameter values ​​obtained by the sensor of the test box under non-abnormal conditions.

[0067] In order to more intuitively demonstrate the process of determining the weight values ​​at different times within a preset time period in the embodiment of the present application, an exemplary formula is used as an example to illustrate the process of determining the weight values ​​at different times within a preset time period: In the case of ; k is the trend value of the environmental parameter value at the current moment, To preset trend threshold, is the weight value of the jth moment relative to the current moment in the preset time period, norm is the normalization function, The timestamp information of the current moment. is the timestamp information of the jth moment in the preset time period; In the case of , is the standard deviation of the environmental parameter values ​​in the time period composed of other moments except the jth moment in the preset time period, It is the standard deviation of the environmental parameter value within the preset time period.

[0068] To avoid the situation where the denominator is 0, In the case of , if the timestamp information of the jth moment is close to the timestamp information of the current moment, for example, the jth moment is equal to the current moment, you can set =1.

[0069] In this way, according to the relationship between the trend value at the current moment and the preset trend threshold, the weight value relative to the current moment can be adaptively set for different moments within the preset time period, so as to use the weight value to perform weighted summation of the environmental parameter values ​​at different moments within the preset time period.

[0070] In one embodiment, when the trend value at the current moment is greater than a preset trend threshold, a weight value negatively correlated with the time interval is determined based on the time interval between the current moment and the target moment, including: taking the inverse of the time interval between the current moment and the target moment as the weight value corresponding to the target moment.

[0071] In this way, by taking the inverse of the time interval between the current moment and the target moment as the weight value corresponding to the target moment, a larger weight value can be set for the historical moments closer to the current moment, so as to increase the contribution of the environmental parameter values ​​close to the current moment to the prediction process of the environmental parameter values ​​of future moments of the current moment.

[0072] In step S103, weight values ​​corresponding to different moments in the preset time period are used to perform weighted averaging on the environmental parameter values ​​at different moments in the preset time period, and the difference between the target value of the environmental parameter value and the weighted averaging result is used as the first adjustment amount information.

[0073] The environmental parameter values ​​at different times within a preset time period are weighted averaged. Since the ambient temperature value at the next moment after the current moment is affected by the ambient temperature value within the preset time period, the weighted average result obtained can reflect the ambient temperature value inside the test chamber at the next moment after the current moment, and can realize the prediction of the ambient temperature value at the next moment after the current moment, so that the environmental parameter control module can adapt to the changes in the ambient temperature value in the test chamber in advance, and improve the regulation accuracy of the ambient temperature value in the test chamber.

[0074] The target value of the environmental parameter value may refer to the environmental parameter value that needs to be achieved at the next moment from the current moment. The target value of the environmental parameter value may be determined based on a pre-stored environmental parameter curve. The environmental parameter curve may include the environmental parameter values ​​inside the test chamber at different moments.

[0075] For example, when the environmental parameter value is a temperature value, the environmental parameter curve may be a pre-stored temperature value curve; when the environmental parameter value is a humidity value, the environmental parameter value may be a pre-stored humidity value curve.

[0076] The difference between the target value of the environmental parameter value and the weighted average result is used as the first adjustment quantity information. If the first adjustment quantity information is greater than 0, it means that there is a certain difference between the environmental parameter value to be reached inside the test chamber at the next moment and the target value. The difference between the ambient temperature value and the target value can be reduced by increasing the operating parameter value of the environmental parameter control module.

[0077] For example, when the environmental parameter value is a temperature value, if the environmental parameter control module of the test box is performing a heating task on the inside of the test box, the first adjustment amount information is greater than 0, indicating that there is a certain difference between the environmental parameter value to be reached by the inside of the test box at the next moment and the target value. The power for heating the internal environment of the test box can be increased to reduce the temperature difference between the ambient temperature value and the target value.

[0078] If the first adjustment amount information is less than 0, it means that the ambient temperature value to be reached inside the test box at the next moment will exceed the target value. The difference between the ambient temperature value and the target value can be reduced by reducing the operating parameter value of the environmental parameter control module.

[0079] In step S104, the operating parameter value of the environmental parameter control module of the test chamber is adjusted according to the first adjustment amount information, so that the environmental parameter control module controls the environmental parameter value inside the test chamber.

[0080] The first adjustment quantity information is used to characterize the expected change in the environmental parameter value when adjusting the environmental parameter value of the test chamber, for example, when the environment of the test chamber is heated by the heating module, the expected increase in the ambient temperature value of the test chamber, or the expected decrease in the ambient temperature value of the test chamber; when it is expected to adjust the internal environmental parameter value of the test chamber, different expected changes in the ambient temperature value correspond to different adjustment quantities of the operating parameter value of the environmental parameter control module.

[0081] By performing actual or simulation tests on the operating parameter values ​​of the environmental parameter control module in advance, it is possible to determine the amount of adjustment required to be made to the operating parameter values ​​of the environmental parameter control module in order to change the ambient temperature value when adjusting the ambient temperature value under different actual environmental parameter values.

[0082] For example, when the ambient temperature inside the test chamber is T1, the power used to heat the internal environment of the test chamber is P1. In order to increase the ambient temperature inside the test chamber by T2, the heating power of the heating module is subjected to actual or simulation tests in advance. It can be determined that when the heating power is increased by P2, the ambient temperature inside the test chamber can be increased from T1 to T1+T2 within a certain period of time.

[0083] In one embodiment, the operating parameter value of the environmental parameter control module of the test box is adjusted according to the first adjustment quantity information, including: determining the second adjustment quantity information according to the first adjustment quantity information and a preset correspondence, wherein the preset correspondence is used to characterize the correspondence between different first adjustment quantity information and different second adjustment quantities; determining the operating parameter value of the environmental parameter control module at the next moment after the current moment according to the second adjustment quantity information and the operating parameter value of the environmental parameter control module at the current moment.

[0084] The first adjustment amount is the expected adjustment amount for the environmental parameter value of the test chamber within a certain period of time. The first adjustment amount can be a positive number, a negative number, or 0; correspondingly, the second adjustment amount can be a positive number, a negative number, or 0; in order to make the change in the environmental parameter value of the test chamber within a certain period of time actually reach the first adjustment amount, the adjustment amount required for the operating parameter value of the environmental parameter control module is the second adjustment amount.

[0085] By conducting actual tests or simulation tests on the environmental parameter control module when it works according to operating parameter values ​​under different environmental parameter values, the correspondence between different first adjustment quantities and different second adjustment quantities can be obtained. The second adjustment quantity information can be determined through the first adjustment quantity information and the preset correspondence.

[0086] Based on the second adjustment quantity information and the operating parameter value of the environmental parameter control module at the current moment, the operating parameter value of the environmental parameter control module at the next moment after the current moment can be determined. For example, by adding the second adjustment quantity information to the operating parameter value of the environmental parameter control module at the current moment, the operating parameter value of the environmental parameter control module at the next moment after the current moment can be obtained.

[0087] In this way, since the first adjustment amount is determined based on the environmental parameter value inside the test chamber within a preset time period, the first adjustment amount can better match the adjustment amount required to adjust the ambient temperature value inside the test chamber. The second adjustment amount information is determined based on the first adjustment amount information and the preset correspondence. Based on the second adjustment amount information and the operating parameter value of the environmental parameter control module at the current moment, more precise regulation of the environmental parameter value can be achieved, so as to better complete the performance testing of the product to be tested in the test chamber at different temperatures.

[0088] Through the intelligent temperature and humidity control method for a fast temperature change test chamber provided in an embodiment of the present application, the trend value of the environmental parameter value at the current moment is determined, and based on the size relationship between the trend value at the current moment and a preset trend threshold, the weight values ​​of different moments in a preset time period before the current moment relative to the current moment are determined to obtain first adjustment quantity information, and the weight values ​​at different moments are determined based on the trend value of the environmental parameter value, so that the first adjustment quantity information can not only comprehensively consider the size of the environmental parameter value within the preset time period, but also consider the changing trend of the environmental parameter value. The first adjustment quantity information is used to adjust the operating parameter values ​​of the environmental parameter control module of the test chamber, and the operating parameter values ​​of the environmental parameter control module can adapt to the changes in the environmental parameter values, thereby achieving more precise control of the environmental parameter values ​​in the test chamber.

[0089] In one embodiment, when the environmental parameter value is a temperature value, the environmental parameter control module is a temperature regulating module, and the operating parameter value includes a regulating power for the temperature value inside the test box.

[0090] The temperature control module can be used to control the temperature of the internal environment of the test chamber. For example, when the performance of the product to be tested in the test chamber changes during the temperature rise process, the temperature control module can be a heating component such as a resistance wire heater and an electric heating rod. The temperature of the internal environment of the test chamber can be increased by heating the air inside the test chamber with the temperature control module.

[0091] For another example, when the performance of the product to be tested in the test chamber changes during the temperature drop process, the temperature adjustment module may be a compressor, which increases the pressure and temperature of the refrigerant by compressing the refrigerant; the refrigerant releases heat in the condenser and changes from gas to liquid; the refrigerant absorbs heat in the evaporator and changes from liquid to gas, thereby lowering the temperature in the test chamber; the flow rate of the refrigerant may be adjusted through the expansion valve in the compressor, thereby adjusting the cooling effect on the temperature in the test chamber; or the temperature adjustment module may also absorb heat by expanding certain gases (such as nitrogen, helium, etc.) to achieve a cooling effect on the inside of the test chamber. The embodiments of the present application do not limit the specific adjustment or means of the temperature value inside the test chamber.

[0092] In one embodiment, when the environmental parameter value is a humidity value, the environmental parameter control module is a humidity adjustment module, and the operating parameter value includes an adjustment power for the humidity value inside the test box.

[0093] The humidity value inside the test chamber can be controlled by the humidity regulating component; for example, in order to increase the humidity value inside the test chamber, water can be atomized by using a high-pressure pump and sprayed into the test chamber through a nozzle, and the humidity inside the test chamber can be increased as the water mist evaporates rapidly in the air; or, ultrasonic vibration can be used to break up water into water mist particles, and the water mist can be blown into the test chamber by a fan, thereby increasing the humidity value inside the test chamber.

[0094] For another example, in order to lower the humidity inside the test chamber, the moisture in the air inside the test chamber can be compressed to condense, and the condensed moisture can be discharged to the outside of the test chamber through a separator; alternatively, the humidity inside the test chamber can be lowered by using a dehumidification wheel or electro-osmosis dehumidification. The embodiments of the present application do not limit the specific adjustment or means of the humidity inside the test chamber.

[0095] Figure 2 FIG. 1 is a schematic diagram of a structure of an intelligent temperature and humidity control system 1000 for a rapid temperature change test chamber according to an exemplary embodiment. Figure 2 The fast temperature change test chamber intelligent temperature and humidity control system 1000 includes: a processor 1100 and a memory 1200, wherein the memory 1200 stores computer program instructions, and when the computer program instructions are executed by the processor 1100, all or part of the steps of the fast temperature change test chamber intelligent temperature and humidity control method in this application are implemented.

[0096] It should be understood that the features of some embodiments of the various applications described herein may be combined with each other, unless specifically stated otherwise.

[0097] Although terms such as "first", "second", and "third" may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Instead, these terms are only used to distinguish one component, part, region, layer, or section from another component, part, region, layer, or section. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section.

[0098] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description herein, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0099] In addition, the word "exemplary" is used herein to mean serving as an example, instance, or diagram. Any aspect or design described herein as "exemplary" is not necessarily to be understood as being advantageous over other aspects or designs. Instead, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or".

[0100] Likewise, although the present application has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. With particular regard to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise noted, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if not structurally equivalent to the disclosed structures.

[0101] Additionally, while particular features of the present application may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and advantageous for any given or particular application.

[0102] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application, and the specification and embodiments are only considered as exemplary.

[0103] It will be appreciated that the present application is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

Claims

1. A method for intelligent temperature and humidity control of a rapid temperature change test chamber, characterized in that: include: Obtain the environmental parameter values ​​inside the test chamber within a preset time period before the current moment to determine the trend value of the environmental parameter value at the current moment; The trend value is used to characterize the rate of change of the environmental parameter value within a preset time period, and the environmental parameter value is any one of the temperature value or the humidity value; According to the relationship between the trend value at the current moment and the preset trend threshold, the weight values ​​of different moments in the preset time period relative to the current moment are determined respectively; Using the weight values ​​corresponding to different moments in the preset time period, weighted averaging the environmental parameter values ​​at different moments in the preset time period, and taking the difference between the target value of the environmental parameter value and the weighted average result as the first adjustment amount information; The operating parameter value of the environmental parameter control module of the test box is adjusted according to the first adjustment amount information, so that the environmental parameter control module controls the environmental parameter value inside the test box.

2. The intelligent temperature and humidity control method for a rapid temperature change test chamber according to claim 1 is characterized in that: The trend value of the environmental parameter value at the current moment is determined in the following way: , k is the trend value of the environmental parameter value at the current moment, n is the number of moments in the preset time period, as well as are the environmental parameter values ​​of the interior of the test chamber at the jth and j+1th moments within the preset time period, as well as They are the maximum and minimum values ​​of the environmental parameters inside the test chamber within the preset time period. as well as They are respectively the timestamp information corresponding to the latest time and the earliest time in the preset time period.

3. The intelligent temperature and humidity control method for a rapid temperature change test chamber according to claim 1, characterized in that: According to the relationship between the trend value at the current moment and the preset trend threshold, the weight values ​​of different moments in the preset time period relative to the current moment are determined respectively, including: When the trend value at the current moment is greater than the preset trend threshold, a weight value negatively correlated with the time interval is determined according to the time interval between the current moment and the target moment; the target moment is any moment within the preset time period; When the trend value at the current moment is less than or equal to the preset trend threshold, the weight value of the target moment is determined according to the ratio of the first standard deviation to the second standard deviation; the first standard deviation is the standard deviation of the environmental parameter values ​​in the time period composed of other moments in the preset time period except the target moment, and the second standard deviation is the standard deviation of the environmental parameter values ​​in the preset time period.

4. The intelligent temperature and humidity control method for a rapid temperature change test chamber according to claim 3 is characterized in that: When the trend value at the current moment is greater than the preset trend threshold, a weight value negatively correlated with the time interval is determined according to the time interval between the current moment and the target moment, including: The reciprocal of the time interval between the current time and the target time is used as the weight value corresponding to the target time.

5. The intelligent temperature and humidity control method for a rapid temperature change test chamber according to claim 1, characterized in that: Adjusting the operating parameter value of the environmental parameter control module of the test box according to the first adjustment amount information includes: Determine the second adjustment amount information according to the first adjustment amount information and a preset corresponding relationship, wherein the preset corresponding relationship is used to characterize the corresponding relationship between different first adjustment amount information and different second adjustment amounts; According to the second adjustment amount information and the operating parameter value of the environmental parameter control module at the current moment, the operating parameter value of the environmental parameter control module at the next moment of the current moment is determined.

6. The intelligent temperature and humidity control method for a rapid temperature change test chamber according to claim 5, characterized in that: In the case where the environmental parameter value is a temperature value, the environmental parameter control module is a temperature regulating module, and the operating parameter value includes a regulating power for the temperature value inside the test box.

7. The intelligent temperature and humidity control method for a rapid temperature change test chamber according to claim 5, characterized in that: In the case where the environmental parameter value is a humidity value, the environmental parameter control module is a humidity adjustment module, and the operating parameter value includes an adjustment power for the humidity value inside the test box.

8. The intelligent temperature and humidity control method for a rapid temperature change test chamber according to claim 1, characterized in that: The preset trend threshold is determined in the following way: Determine the trend values ​​at different times within the preset time period respectively, and determine the maximum trend value and the minimum trend value from the multiple trend values ​​at different times within the corresponding preset time period; The average value of the maximum trend value and the minimum trend value is used as the preset trend threshold.

9. An intelligent temperature and humidity control system for a rapid temperature change test chamber, characterized in that: include: A processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the intelligent temperature and humidity control method for a fast temperature change test chamber according to any one of claims 1 to 8 is implemented.

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