An ice lantern accelerated test method based on thermoelectric coupling

Abstract

The present invention relates to the field of electrical equipment detection technology, and discloses an ice lantern accelerated test method based on thermoelectric coupling, comprising: determining the temperature cycle range, voltage fluctuation range, and number of accelerated test cycles of the thermoelectric coupling test environment based on the actual operating parameters of the ice lantern; generating a multi-cycle synchronization control signal corresponding to the number of accelerated test cycles, and performing a multi-cycle test according to the multi-cycle synchronization control signal, collecting dynamic response data of the ice lantern in the thermoelectric coupling test environment; constructing a performance degradation model of multi-physical field coupling, and inputting the dynamic response data, temperature cycle range, and voltage fluctuation range into the performance degradation model, outputting the parameter drift trend of the ice lantern under long-term operation, and generating an accelerated test report. The present invention can effectively solve the problem that existing accelerated test methods are difficult to accurately predict the long-term performance degradation of ice lanterns, reduce product R&D costs, enhance market competitiveness, and provide a strong guarantee for the stable operation of ice lantern products in complex environments.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment detection, and in particular to an ice lantern accelerated test method based on thermoelectric coupling. Background Art

[0002] In the field of electrical equipment testing, especially for the testing of ice lantern products, traditional testing methods have many limitations. With the development of science and technology, the requirements for the performance of ice lanterns have become increasingly stringent. They must not only meet basic lighting functions, but also maintain stable operation in complex environments. Current testing methods often only focus on single electrical performance or cold resistance tests, and lack a comprehensive assessment of the thermal and electrical coupling of ice lanterns in actual use. For example, in a cold environment, the temperature change of an ice lantern will directly affect the stability of its electrical performance, and traditional testing methods are difficult to accurately simulate the working scenario under this coupling state. At the same time, existing accelerated test methods cannot accurately predict the performance degradation of ice lanterns during long-term use, which not only increases product research and development costs, but also reduces market competitiveness.

[0003] Therefore, it is urgent to provide a technical solution to solve the above problems. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an ice lantern accelerated test method based on thermoelectric coupling.

[0005] In a first aspect, the present invention provides an ice lantern accelerated test method based on thermoelectric coupling, the technical solution of the method is as follows:

[0006] Based on the actual operating parameters of the ice lantern, determine the temperature cycle range, voltage fluctuation range and number of accelerated test cycles of the thermoelectric coupling test environment;

[0007] A fuzzy PID control algorithm is used to generate a multi-cycle synchronous control signal corresponding to the number of cycles of the accelerated test; wherein the multi-cycle synchronous control signal is generated based on the temperature cycle range, the voltage fluctuation range and a preset proportional coefficient;

[0008] Performing a multi-cycle test according to the multi-cycle synchronous control signal to collect dynamic response data of the ice lantern in the thermoelectric coupling test environment in real time;

[0009] Building a multi-physics field coupled performance degradation model based on the dynamic response data, inputting the dynamic response data, the temperature cycle range, and the voltage fluctuation range into the performance degradation model, and outputting a parameter drift trend of the ice lantern under long-term operation;

[0010] An accelerated test report of the ice lantern is generated according to the parameter drift trend; wherein the accelerated test report includes: equivalent operating time and key performance parameter degradation curve.

[0011] The beneficial effects of the ice lantern accelerated test method based on thermoelectric coupling of the present invention are as follows:

[0012] The method of the present invention can overcome the limitations of traditional single testing methods, accurately simulate the working scenarios under the thermoelectric coupling state, effectively solve the problem that existing accelerated test methods are difficult to accurately predict the long-term performance degradation of ice lanterns, reduce product R&D costs, enhance market competitiveness, and provide strong guarantees for the stable operation of ice lantern products in complex environments.

[0013] On the basis of the above solution, the ice lantern accelerated test method based on thermoelectric coupling of the present invention can be further improved as follows.

[0014] In an optional manner, the actual operating parameters include: rated operating voltage, normal operating temperature range, expected service life, maximum allowable voltage fluctuation ratio and extreme ambient temperature difference coefficient;

[0015] The step of determining the temperature cycle range, voltage fluctuation range, and number of accelerated test cycles of the thermoelectric coupling test environment based on the actual operating parameters of the ice lantern further includes:

[0016] The temperature cycle range is determined based on the normal operating temperature range and the extreme environment temperature difference coefficient, and its expression is:

[0017]

[0018] Where, , , Indicates the temperature cycle range, Indicates the lower limit of the normal operating temperature range. Indicates the upper temperature limit of the normal operating temperature range. represents the extreme environment temperature difference coefficient;

[0019] The voltage fluctuation range is determined according to the ratio of the rated operating voltage to the maximum allowable voltage fluctuation, and the expression is:

[0020]

[0021] Where, , , Indicates the voltage fluctuation range, Indicates the rated operating voltage, Indicates the maximum allowable voltage fluctuation ratio;

[0022] The number of accelerated test cycles is determined based on the expected service life and the acceleration factor, and the expression is:

[0023]

[0024] Where, Indicates the number of accelerated test cycles, represents the stated expected useful life, Indicates the duration of a single test cycle. represents the acceleration factor.

[0025] In an optional manner, the expression of the multi-cycle synchronization control signal is:

[0026]

[0027] Where, ; Indicates the temperature change cycle, Indicates the voltage change period, the temperature change period and the voltage change period according to the preset proportional coefficient synchronous, , , , Indicates the Synchronous control signal for each test cycle, , Indicates the The temperature change rate of a test cycle, Indicates the The voltage fluctuation amplitude of a test cycle.

[0028] In an optional manner, the step of collecting the dynamic response data of the ice lantern in the thermoelectric coupling test environment in real time further includes:

[0029] In any cycle, the leakage current, power loss, and surface temperature distribution of the ice lantern are collected in real time according to the sampling frequency until the leakage current, power loss, and surface temperature distribution of the ice lantern in each cycle are obtained and determined as the dynamic response data; wherein the expression of the dynamic response data is: ; , Indicates the Dynamic response data of cycles, Indicates the Sampling time points, Indicates the number of sampling time points in a period, Indicates the The first The temperature of the ice lamp at each sampling time point, Indicates the The first The ice lamp voltage at each sampling time point is Indicates the The first The leakage current at each sampling time point is Indicates the The first The power loss at each sampling time point is Indicates the The first Surface temperature distribution at each sampling time point.

[0030] In an optional manner, the performance degradation model is expressed as:

[0031]

[0032] Where, Indicates that the ice lantern is Insulation resistance value at the moment, Indicates the initial insulation resistance value of the ice lamp. It represents the degradation rate coefficient, which is calibrated according to the leakage current; Represents the activation energy of the material, calibrated according to the surface temperature distribution; represents the Boltzmann constant, Indicates the The ambient temperature corresponding to the moment, Indicates the The applied voltage corresponding to the moment, Indicates the voltage acceleration factor, calibrated according to power loss;

[0033] The expression of the parameter drift trend is:

[0034]

[0035] Where, Indicates the parameter drift trend, , .

[0036] In an optional manner, the step of generating an accelerated test report of the ice lantern according to the parameter drift trend further includes:

[0037] The equivalent running time is generated according to the parameter drift trend, and its expression is:

[0038]

[0039] Where, represents the equivalent running time;

[0040] According to the parameter drift trend Generate the key performance parameter degradation curve, the expression of which is:

[0041]

[0042] Where, represents the degradation curve of key performance parameters, .

[0043] In an optional manner, the surface temperature distribution is collected by multiple thermocouple sensors at a preset spatial density, and noise filtering and normalization calibration are performed.

[0044] In an optional manner, the input variables of the fuzzy PID control algorithm include real-time deviation values of temperature error and voltage error, and the preset proportional coefficient is used to dynamically adjust the coupling weight of the temperature change rate and the voltage fluctuation amplitude, so that the temperature gradient and electric field strength changes in the multi-cycle synchronous control signal meet linear or nonlinear matching rules.

[0045] In a second aspect, the present invention provides an ice lantern accelerated test system based on thermoelectric coupling, the technical solution of the system is as follows:

[0046] A determination module is used to determine the temperature cycle range, voltage fluctuation range and number of accelerated test cycles of the thermoelectric coupling test environment based on the actual operating parameters of the ice lamp;

[0047] a generating module, configured to generate a multi-cycle synchronous control signal corresponding to the number of cycles of the accelerated test using a fuzzy PID control algorithm; wherein the multi-cycle synchronous control signal is generated based on the temperature cycle range, the voltage fluctuation range, and a preset proportional coefficient;

[0048] an acquisition module, configured to perform a multi-cycle test according to the multi-cycle synchronous control signal and acquire dynamic response data of the ice lantern in the thermoelectric coupling test environment in real time;

[0049] A test module is used to construct a multi-physics field coupled performance degradation model based on the dynamic response data, input the dynamic response data, the temperature cycle range, and the voltage fluctuation range into the performance degradation model, and output the parameter drift trend of the ice lantern under long-term operation;

[0050] An output module is used to generate an accelerated test report of the ice lantern according to the parameter drift trend; wherein the accelerated test report includes: equivalent operating time and key performance parameter degradation curve.

[0051] The beneficial effects of the ice lantern accelerated test system based on thermoelectric coupling of the present invention are as follows:

[0052] The system of the present invention can overcome the limitations of traditional single testing methods, accurately simulate the working scenarios under the thermoelectric coupling state, effectively solve the problem that existing accelerated test methods are difficult to accurately predict the long-term performance degradation of ice lanterns, reduce product R&D costs, enhance market competitiveness, and provide strong guarantees for the stable operation of ice lantern products in complex environments.

[0053] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0055] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the drawings. In the drawings:

[0056] Figure 1 Schematic diagram of a flow chart of an embodiment of an ice lantern accelerated test method based on thermoelectric coupling of the present invention;

[0057] Figure 2 The figure is a structural diagram of an embodiment of an ice lantern accelerated test system based on thermoelectric coupling of the present invention. DETAILED DESCRIPTION

[0058] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0059] Figure 1 FIG1 shows a flow chart of an embodiment of an ice lantern accelerated test method based on thermoelectric coupling provided by the present invention. Figure 1 As shown, the following steps are included:

[0060] S1. Based on the actual operating parameters of the ice lamp, determine the temperature cycle range, voltage fluctuation range and number of accelerated test cycles of the thermoelectric coupling test environment.

[0061] Ice lanterns are electrical devices that integrate lighting functions and decorative structures. They contain light-emitting elements, power modules, and a translucent housing. They operate in low-temperature, humid environments for extended periods, meeting specific electrical safety and optical performance requirements. Actual operating parameters include: rated operating voltage, normal operating temperature range, expected service life, maximum allowable voltage fluctuation ratio, and extreme ambient temperature coefficient.

[0062] Among them, the thermoelectric coupling test environment refers to a composite test condition that simultaneously applies temperature cycle stress and voltage fluctuation stress and controls the dynamic coupling relationship between the two, which is used to simulate multi-physical field interactions such as thermal expansion and conductivity changes in the actual use of ice lanterns. The temperature cycle range refers to the boundary interval of temperature changes in the thermoelectric coupling test environment, which is expanded according to the actual working parameters of the ice lantern to cover extreme temperature difference scenarios. The voltage fluctuation range refers to the fluctuation amplitude range of the test voltage, which is set based on the rated voltage of the ice lantern and the allowable fluctuation ratio to simulate power supply instability. The number of accelerated test cycles refers to the number of accelerated test executions set to shorten the test period. The actual service life is mapped by the acceleration factor, which is determined by the intensity of the thermoelectric coupling stress.

[0063] S2. Using a fuzzy PID control algorithm to generate a multi-cycle synchronous control signal corresponding to the number of cycles of the acceleration test.

[0064] The multi-cycle synchronous control signal is a set of sequential instructions generated by the fuzzy PID control algorithm. This signal is generated based on the temperature cycle range, voltage fluctuation range, and a preset proportionality factor. The preset proportionality factor is a dynamic matching weighting factor between the temperature gradient and the electric field intensity. It is used to control the output of the fuzzy PID algorithm and ensure that the thermoelectric parameter coupling relationship conforms to actual physical laws.

[0065] S3. Execute a multi-cycle test according to the multi-cycle synchronous control signal, and collect dynamic response data of the ice lantern in the thermoelectric coupling test environment in real time.

[0066] Among them, dynamic response data refers to the multi-dimensional performance parameters of the ice lamp collected in real time in a thermoelectric coupling test environment, including leakage current, power loss and surface temperature distribution.

[0067] S4. Construct a multi-physics field coupled performance degradation model based on the dynamic response data, input the dynamic response data, the temperature cycle range and the voltage fluctuation range into the performance degradation model, and output the parameter drift trend of the ice lantern under long-term operation.

[0068] The multi-physics field coupled performance degradation model is a mathematical model that integrates the interaction equations of temperature, electric, and mechanical stress fields. It uses dynamic response data to calibrate material degradation parameters (such as activation energy and voltage acceleration factor) to predict the long-term performance degradation of ice lanterns. Parameter drift trends are the quantitative trajectory of the degradation of key performance parameters (such as insulation resistance and luminous flux) over time. These outputs from the performance degradation model are used to assess actual service life.

[0069] S5. Generate an accelerated test report of the ice lantern according to the parameter drift trend.

[0070] The accelerated test report includes the equivalent operating time and key performance parameter degradation curves. The equivalent operating time is a predicted value of the actual service life of the ice lanterns obtained by extrapolating the accelerated test data. The key performance parameter degradation curve is a function curve with time as the horizontal axis and the performance parameter as the vertical axis, visually showing the degradation process of the ice lanterns from the initial state to the failure threshold.

[0071] In an optional manner, the step of determining the temperature cycle range, voltage fluctuation range, and number of accelerated test cycles of the thermoelectric coupling test environment based on the actual operating parameters of the ice lantern further includes:

[0072] The temperature cycle range is determined based on the normal operating temperature range and the extreme environment temperature difference coefficient, and its expression is:

[0073]

[0074] Where, , , Indicates the temperature cycle range, Indicates the lower limit of the normal operating temperature range. Indicates the upper temperature limit of the normal operating temperature range. Indicates the extreme environment temperature difference coefficient. For example, if the normal operating temperature range is , ,but , .

[0075] The voltage fluctuation range is determined according to the ratio of the rated operating voltage to the maximum allowable voltage fluctuation, and the expression is:

[0076]

[0077] Where, , , Indicates the voltage fluctuation range, Indicates the rated operating voltage, Indicates the maximum allowable voltage fluctuation ratio. For example, if , ,but , .

[0078] The number of accelerated test cycles is determined based on the expected service life and the acceleration factor, and the expression is:

[0079]

[0080] Where, Indicates the number of accelerated test cycles, represents the stated expected useful life, Indicates the duration of a single test cycle. represents the acceleration factor.

[0081] In an optional manner, the expression of the multi-cycle synchronization control signal is:

[0082]

[0083] In the formula ; Indicates the temperature change cycle, Indicates the voltage change period, the temperature change period and the voltage change period according to the preset proportional coefficient synchronous, , , , Indicates the Synchronous control signal for each test cycle, , Indicates the The temperature change rate of a test cycle, Indicates the The voltage fluctuation amplitude of a test cycle.

[0084] In an optional manner, the step of collecting the dynamic response data of the ice lantern in the thermoelectric coupling test environment in real time further includes:

[0085] In any cycle, the leakage current, power loss and surface temperature distribution of the ice lantern are collected in real time according to the sampling frequency until the leakage current, power loss and surface temperature distribution of the ice lantern in each cycle are obtained and determined as the dynamic response data.

[0086] The expression of dynamic response data is: ; , Indicates the Dynamic response data of a cycle, Indicates the Sampling time points, Indicates the number of sampling time points in a period, Indicates the The first The temperature of the ice lamp at each sampling time point, Indicates the The first The ice lamp voltage at each sampling time point is Indicates the The first The leakage current at each sampling time point is Indicates the The first The power loss at each sampling time point, Indicates the The first Surface temperature distribution at each sampling time point.

[0087] In an optional manner, the performance degradation model is expressed as:

[0088]

[0089] Where, Indicates that the ice lantern is Insulation resistance value at the moment, Indicates the initial insulation resistance value of the ice lamp. It represents the degradation rate coefficient, which is calibrated according to the leakage current; Represents the activation energy of the material, calibrated according to the surface temperature distribution; represents the Boltzmann constant (valued at 8.617×10 −5 eV / K), Indicates the The ambient temperature corresponding to the moment, Indicates the The applied voltage corresponding to the moment, Indicates the voltage acceleration factor, calibrated according to power loss.

[0090] The expression of the parameter drift trend is:

[0091]

[0092] Where, Indicates the parameter drift trend, , .

[0093] In an optional manner, the step of generating an accelerated test report of the ice lantern according to the parameter drift trend further includes:

[0094] The equivalent running time is generated according to the parameter drift trend, and its expression is:

[0095]

[0096] Where, represents the equivalent running time. Assume , , , , , , ,but .

[0097] According to the parameter drift trend Generate the key performance parameter degradation curve, the expression of which is:

[0098]

[0099] Where, represents the degradation curve of key performance parameters, .

[0100] In an optional manner, the surface temperature distribution is collected by multiple thermocouple sensors at a preset spatial density, and noise filtering and normalization calibration are performed.

[0101] In an optional manner, the input variables of the fuzzy PID control algorithm include real-time deviation values of temperature error and voltage error, and the preset proportional coefficient is used to dynamically adjust the coupling weight of the temperature change rate and the voltage fluctuation amplitude, so that the temperature gradient and electric field strength changes in the multi-cycle synchronous control signal meet linear or nonlinear matching rules.

[0102] The technical solution of this embodiment can overcome the limitations of traditional single testing methods, accurately simulate the working scenarios under the thermoelectric coupling state, effectively solve the problem that existing accelerated test methods are difficult to accurately predict the long-term performance degradation of ice lanterns, reduce product R&D costs, enhance market competitiveness, and provide strong guarantees for the stable operation of ice lantern products in complex environments.

[0103] Figure 2 FIG1 shows a schematic diagram of an embodiment of an ice lantern accelerated test system based on thermoelectric coupling provided by the present invention. Figure 2 As shown, the system includes:

[0104] A determination module 210 is used to determine the temperature cycle range, voltage fluctuation range and number of accelerated test cycles of the thermoelectric coupling test environment based on the actual operating parameters of the ice lantern;

[0105] A generating module 220 is configured to generate a multi-cycle synchronous control signal corresponding to the number of cycles of the accelerated test using a fuzzy PID control algorithm; wherein the multi-cycle synchronous control signal is generated based on the temperature cycle range, the voltage fluctuation range, and a preset proportional coefficient;

[0106] An acquisition module 230 is configured to perform a multi-cycle test according to the multi-cycle synchronous control signal and acquire dynamic response data of the ice lantern in the thermoelectric coupling test environment in real time;

[0107] The test module 240 is configured to construct a multi-physics field coupled performance degradation model based on the dynamic response data, input the dynamic response data, the temperature cycle range, and the voltage fluctuation range into the performance degradation model, and output a parameter drift trend of the ice lantern under long-term operation;

[0108] The output module 250 is used to generate an accelerated test report of the ice lantern according to the parameter drift trend; wherein the accelerated test report includes: equivalent operating time and key performance parameter degradation curve.

[0109] Furthermore, the above embodiments provide systems that implement their functions using only the division of the above functional modules as examples. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the system can be divided into different functional modules according to actual conditions to complete all or part of the functions described above. Furthermore, the systems and method embodiments provided in the above embodiments share the same concept. The specific implementation process is detailed in the method embodiments and will not be repeated here.

[0110] The above description is merely an illustration of preferred embodiments of the present invention and the underlying technical principles. Those skilled in the art should understand that the scope of the present invention is not limited to technical solutions formed by specific combinations of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the aforementioned concepts. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this invention.

[0111] It should be noted that the terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects and to define a specific order or precedence. Where appropriate, the order used for similar objects may be interchanged, such that the embodiments of the present application described herein can be implemented in an order other than the order shown or described.

[0112] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An ice lantern accelerated test method based on thermoelectric coupling, characterized in that: The method comprises: Based on the actual working parameters of the ice lantern, determine the temperature cycle range, voltage fluctuation range and number of accelerated test cycles of the thermoelectric coupling test environment; A fuzzy PID control algorithm is used to generate a multi-cycle synchronous control signal corresponding to the number of cycles of the accelerated test; wherein the multi-cycle synchronous control signal is generated based on the temperature cycle range, the voltage fluctuation range and a preset proportional coefficient; Performing a multi-cycle test according to the multi-cycle synchronous control signal to collect dynamic response data of the ice lantern in the thermoelectric coupling test environment in real time; Building a multi-physics field coupled performance degradation model based on the dynamic response data, inputting the dynamic response data, the temperature cycle range, and the voltage fluctuation range into the performance degradation model, and outputting a parameter drift trend of the ice lantern under long-term operation; generating an accelerated test report of the ice lantern according to the parameter drift trend; wherein the accelerated test report includes: equivalent operating time and degradation curve of key performance parameters; The actual operating parameters include: rated operating voltage, normal operating temperature range, expected service life, maximum allowable voltage fluctuation ratio and extreme ambient temperature difference coefficient; The step of determining the temperature cycle range, voltage fluctuation range, and number of accelerated test cycles of the thermoelectric coupling test environment based on the actual operating parameters of the ice lantern further includes: The temperature cycle range is determined based on the normal operating temperature range and the extreme environment temperature difference coefficient, and its expression is: Where, , , Indicates the temperature cycle range, Indicates the lower limit of the normal operating temperature range. Indicates the upper temperature limit of the normal operating temperature range. represents the extreme environment temperature difference coefficient; The voltage fluctuation range is determined according to the ratio of the rated operating voltage to the maximum allowable voltage fluctuation, and the expression is: Where, , , Indicates the voltage fluctuation range, Indicates the rated operating voltage, Indicates the maximum allowable voltage fluctuation ratio; The number of accelerated test cycles is determined based on the expected service life and the acceleration factor, and the expression is: Where, Indicates the number of accelerated test cycles, represents the stated expected useful life, Indicates the duration of a single test cycle. represents the acceleration factor; The performance degradation model is expressed as: Where, Indicates that the ice lantern is Insulation resistance value at the moment, Indicates the initial insulation resistance value of the ice lamp. It represents the degradation rate coefficient, which is calibrated according to the leakage current; Represents the activation energy of the material, calibrated according to the surface temperature distribution; represents the Boltzmann constant, Indicates the The ambient temperature corresponding to the moment, Indicates the The applied voltage corresponding to the moment, Indicates the voltage acceleration factor, calibrated according to power loss; The expression of the parameter drift trend is: Where, Indicates the parameter drift trend, , ; The step of generating an accelerated test report of the ice lantern according to the parameter drift trend further includes: The equivalent running time is generated according to the parameter drift trend, and its expression is: Where, represents the equivalent running time; According to the parameter drift trend Generate the key performance parameter degradation curve, the expression of which is: Where, represents the degradation curve of key performance parameters, .

2. The ice lantern accelerated test method based on thermoelectric coupling according to claim 1, characterized in that: The expression of the multi-cycle synchronous control signal is: Where, ; Indicates the temperature change cycle, Indicates the voltage change period, the temperature change period and the voltage change period according to the preset proportional coefficient synchronous, , , , Indicates the Synchronous control signal for each test cycle, , Indicates the The temperature change rate of a test cycle, Indicates the The voltage fluctuation amplitude of a test cycle.

3. The ice lantern accelerated test method based on thermoelectric coupling according to claim 2, characterized in that: The step of collecting the dynamic response data of the ice lantern in the thermoelectric coupling test environment in real time further includes: In any cycle, the leakage current, power loss, and surface temperature distribution of the ice lantern are collected in real time according to the sampling frequency until the leakage current, power loss, and surface temperature distribution of the ice lantern in each cycle are obtained and determined as the dynamic response data; wherein the expression of the dynamic response data is: ; , Indicates the Dynamic response data of a cycle, Indicates the Sampling time points, Indicates the number of sampling time points in a period, Indicates the The first The temperature of the ice lamp at each sampling time point, Indicates the The first The ice lamp voltage at each sampling time point is Indicates the The first The leakage current at each sampling time point is Indicates the The first The power loss at each sampling time point is Indicates the The first Surface temperature distribution at each sampling time point.

4. The ice lantern accelerated test method based on thermoelectric coupling according to claim 1, characterized in that: The surface temperature distribution is collected by multiple thermocouple sensors at a preset spatial density, and noise filtering and normalization calibration are performed.

5. The ice lantern accelerated test method based on thermoelectric coupling according to claim 1, characterized in that: The input variables of the fuzzy PID control algorithm include the real-time deviation values of the temperature error and the voltage error, and the preset proportional coefficient is used to dynamically adjust the coupling weight of the temperature change rate and the voltage fluctuation amplitude, so that the temperature gradient and electric field intensity changes in the multi-cycle synchronous control signal meet the linear or nonlinear matching rules.

6. An ice lantern accelerated test system based on thermoelectric coupling, characterized in that: The system comprises: A determination module is used to determine the temperature cycle range, voltage fluctuation range and number of accelerated test cycles of the thermoelectric coupling test environment based on the actual operating parameters of the ice lamp; a generating module, configured to generate a multi-cycle synchronous control signal corresponding to the number of cycles of the accelerated test using a fuzzy PID control algorithm; wherein the multi-cycle synchronous control signal is generated based on the temperature cycle range, the voltage fluctuation range, and a preset proportional coefficient; an acquisition module, configured to perform a multi-cycle test according to the multi-cycle synchronous control signal and acquire dynamic response data of the ice lantern in the thermoelectric coupling test environment in real time; A test module is used to construct a multi-physics field coupled performance degradation model based on the dynamic response data, input the dynamic response data, the temperature cycle range, and the voltage fluctuation range into the performance degradation model, and output the parameter drift trend of the ice lantern under long-term operation; An output module, configured to generate an accelerated test report of the ice lantern according to the parameter drift trend; wherein the accelerated test report includes: equivalent operating time and degradation curve of key performance parameters; The actual operating parameters include: rated operating voltage, normal operating temperature range, expected service life, maximum allowable voltage fluctuation ratio and extreme ambient temperature difference coefficient; the determination module is specifically used to: The temperature cycle range is determined based on the normal operating temperature range and the extreme environment temperature difference coefficient, and its expression is: Where, , , Indicates the temperature cycle range, Indicates the lower limit of the normal operating temperature range. Indicates the upper temperature limit of the normal operating temperature range. represents the extreme environment temperature difference coefficient; The voltage fluctuation range is determined according to the ratio of the rated operating voltage to the maximum allowable voltage fluctuation, and the expression is: Where, , , Indicates the voltage fluctuation range, Indicates the rated operating voltage, Indicates the maximum allowable voltage fluctuation ratio; The number of accelerated test cycles is determined based on the expected service life and the acceleration factor, and the expression is: Where, Indicates the number of accelerated test cycles, represents the stated expected useful life, Indicates the duration of a single test cycle. represents the acceleration factor; The performance degradation model is expressed as: Where, Indicates that the ice lantern is Insulation resistance value at the moment, Indicates the initial insulation resistance value of the ice lamp. It represents the degradation rate coefficient, which is calibrated according to the leakage current; Represents the activation energy of the material, calibrated according to the surface temperature distribution; represents the Boltzmann constant, Indicates the The ambient temperature corresponding to the moment, Indicates the The applied voltage corresponding to the moment, Indicates the voltage acceleration factor, calibrated according to power loss; The expression of the parameter drift trend is: Where, Indicates the parameter drift trend, , ; The step of generating an accelerated test report of the ice lantern according to the parameter drift trend further includes: The equivalent running time is generated according to the parameter drift trend, and its expression is: Where, represents the equivalent running time; According to the parameter drift trend Generate the key performance parameter degradation curve, the expression of which is: Where, represents the degradation curve of key performance parameters, .

Images