Control method and control system for reference voltage divider calibration

Abstract

The invention relates to the field of precision measurement and calibration, and discloses a control method for reference voltage divider calibration, which comprises the following steps: carrying out environment calibration on a current calibration environment based on correction data in a historical correction database, carrying out pre-detection on a to-be-referenced voltage divider to obtain pre-detection characteristics, and carrying out pre-detection on the to-be-referenced voltage divider according to the historical correction data. The reference voltage divider is subjected to thermal stabilization according to the current calibration environment, the reference voltage divider is calibrated after thermal stabilization is completed, the calibration module is controlled to calibrate the reference voltage divider according to data output by the reference voltage divider in the calibration process, and the reference voltage divider is calibrated after calibration is completed. Obtaining the output uncertainty of the calibrated reference voltage divider; and if the output uncertainty of the calibrated reference voltage divider is not greater than the standard output uncertainty of the reference voltage divider, the reference voltage divider is stable, and the calibration of the reference voltage divider is completed. According to the invention, through the automatic and intelligent calibration process, the calibration precision and efficiency are significantly improved.

Description

Technical Field

[0001] The invention relates to the field of precision measurement and calibration, and in particular to a control method and a control system for calibrating a reference voltage divider. Background Art

[0002] In the field of precision measurement and calibration, the reference voltage divider is a standard device for voltage measurement and transmission. The stability and accuracy of its performance are directly related to the reliability and accuracy of the entire measurement system. With the development of science and technology and the improvement of industrial demand, the calibration accuracy requirements for reference voltage dividers are becoming increasingly stringent. Traditional calibration methods often rely on manual operation and empirical judgment, which is not only inefficient, but also easily affected by environmental factors, resulting in large uncertainty in the calibration results. Especially in complex and changeable calibration environments, changes in environmental factors such as temperature, humidity, and electromagnetic interference will have a significant impact on the calibration results, and thus affect the accuracy of subsequent measurements.

[0003] In addition, traditional calibration methods usually lack a comprehensive assessment of the reference voltage divider status, and only judge whether it is qualified based on a single calibration result, ignoring the performance degradation or instability that may occur during the use of the reference voltage divider. This single evaluation standard often fails to detect and deal with potential problems in a timely manner, thereby increasing the risk of measurement errors. Summary of the invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and provide a control method for reference voltage divider calibration, comprising the following steps: Step 1: Obtain environmental data of the current calibration environment, perform environmental calibration on the current calibration environment based on the calibration data in the historical calibration database, and proceed to step 2 after the environmental calibration is completed; Step 2: Perform a pre-detection on the reference voltage divider to obtain a pre-detection feature, obtain a usable feature of the reference voltage divider based on historical calibration data, and determine whether the reference voltage divider is usable based on the preliminary detection feature and the usable feature of the reference voltage divider. If it is usable, proceed to step 3; otherwise, replace the reference voltage divider to be calibrated. Step 3: After the calibration environment and equipment are ready, the reference voltage divider is thermally stabilized according to the current calibration environment. After the thermal stabilization is completed, the reference voltage divider is calibrated. According to the data output by the reference voltage divider during the calibration process, the calibration module is controlled to calibrate the reference voltage divider. After the calibration is completed, the output uncertainty of the calibrated reference voltage divider is obtained. Step 4, judging the stability of the reference voltage divider according to the output uncertainty of the reference voltage divider after calibration and the standard output uncertainty of the reference voltage divider. If the output uncertainty of the reference voltage divider after calibration is not greater than the standard output uncertainty of the reference voltage divider, the reference voltage divider is stable and the process proceeds to step 7; otherwise, the process proceeds to step 5; Step 5, obtaining the accuracy of the reference voltage divider according to the output uncertainty of the reference voltage divider after calibration and the standard output uncertainty of the reference voltage divider. If the obtained accuracy of the reference voltage divider is less than the accuracy threshold, proceed to step 6; otherwise, issue a warning message indicating that the reference voltage divider is completely attenuated. Step 6, the management module obtains the output fluctuation range of the reference voltage divider after correction according to the output uncertainty of the reference voltage divider after calibration, and then proceeds to step 7; Step 7: Complete the reference voltage divider calibration.

[0005] Furthermore, the step of obtaining the environmental data of the current calibration environment and performing environmental calibration on the current calibration environment based on the calibration data in the historical calibration database includes: Acquire the calibration features of the current calibration environment, match the calibration data of the corresponding calibration features in the correction data in the historical correction database according to the calibration features, and calibrate the current calibration environment according to the environmental parameters in the calibration data of the corresponding calibration features; wherein the calibration features include dimensional data.

[0006] Further, the method of performing a pre-detection on the reference voltage divider to obtain a pre-detection feature, obtaining an available feature of the reference voltage divider based on historical calibration data, and judging whether the reference voltage divider is available based on the preliminary detection feature and the available feature of the reference voltage divider includes: Perform a pre-detection on the reference voltage divider to obtain the difference between the reference voltage divider output and the standard reference voltage divider output; obtain the calibration range of the reference voltage divider based on historical calibration data; if the difference is within the calibration range of the reference voltage divider, the reference voltage divider is usable, otherwise, it is unusable.

[0007] Furthermore, thermally stabilizing the reference voltage divider according to the current calibration environment includes: thermally stabilizing the reference voltage divider for a set time period in the calibration environment after calibration.

[0008] Furthermore, the control of the calibration module to calibrate the reference voltage divider according to the data output by the reference voltage divider during the calibration process, and obtaining the output uncertainty of the calibrated reference voltage divider after the calibration, comprises: When the difference between the output of the reference voltage divider and the output of the standard reference voltage divider is adjusted to be smaller than the output difference threshold, the calibration of the reference voltage divider is completed; After the calibration is completed, the output data of a set number of calibrated reference voltage dividers are collected to obtain the fluctuation range of the output data. The sum of the fluctuation range of the output data and the output difference threshold is used to obtain the fluctuation range of the corrected output data, which is the output uncertainty of the calibrated reference voltage divider.

[0009] Furthermore, judging the stability of the reference voltage divider according to the output uncertainty of the reference voltage divider after calibration and the standard output uncertainty of the reference voltage divider includes: If the output uncertainty of the reference voltage divider after calibration is within the range of the standard output uncertainty of the reference voltage divider, the reference voltage divider is stable, otherwise it is unstable.

[0010] Furthermore, the accuracy of the reference voltage divider is obtained according to the output uncertainty of the calibrated reference voltage divider and the standard output uncertainty of the reference voltage divider, including: Among them, the range value of the output uncertainty of the reference voltage divider after calibration is: the range of the output uncertainty of the reference voltage divider after calibration, and the range value of the standard output uncertainty of the reference voltage divider is: the range of the standard output uncertainty of the reference voltage divider.

[0011] A control system for reference voltage divider calibration, applying the control method for reference voltage divider calibration, comprising a cloud data server, an environmental control module, a calibration module, a data processing module, a communication module and a data acquisition module; The environmental control module, calibration module, communication module and data acquisition module are respectively connected to the data processing module; the cloud data server is communicatively connected to the communication module.

[0012] The beneficial effects of the present invention are: improving calibration accuracy and efficiency: through an automated and intelligent calibration process, the errors caused by human operation are reduced, and at the same time, historical data and intelligent algorithms are used to optimize the calibration process, which significantly improves the calibration accuracy and efficiency.

[0013] Enhanced environmental adaptability: The system can automatically sense and adjust the calibration environment to ensure stable calibration results under any conditions, greatly enhancing the environmental adaptability and robustness of the system.

[0014] Comprehensively evaluate the performance of the reference divider: Through multi-dimensional evaluation such as pre-test, stability assessment and accuracy calculation, potential problems of the reference divider can be discovered and dealt with in a timely manner, extending its service life and reducing maintenance costs.

[0015] Convenient data management and sharing: All calibration data are stored in the cloud server, which is convenient for long-term storage, query and analysis of data. It also supports remote access, which promotes information sharing and communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of a control method for reference voltage divider calibration; Figure 2is a schematic diagram of a control system for reference voltage divider calibration; Figure 3 This is a schematic diagram of the data acquisition module principle. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0018] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0019] like Figure 1 As shown, the control method for reference voltage divider calibration includes the following steps: Step 1: Obtain environmental data of the current calibration environment, perform environmental calibration on the current calibration environment based on the calibration data in the historical calibration database, and proceed to step 2 after the environmental calibration is completed; Step 2: Perform a pre-detection on the reference voltage divider to obtain a pre-detection feature, obtain a usable feature of the reference voltage divider based on historical calibration data, and determine whether the reference voltage divider is usable based on the preliminary detection feature and the usable feature of the reference voltage divider. If it is usable, proceed to step 3; otherwise, replace the reference voltage divider to be calibrated. Step 3: After the calibration environment and equipment are ready, the reference voltage divider is thermally stabilized according to the current calibration environment. After the thermal stabilization is completed, the reference voltage divider is calibrated. According to the data output by the reference voltage divider during the calibration process, the calibration module is controlled to calibrate the reference voltage divider. After the calibration is completed, the output uncertainty of the calibrated reference voltage divider is obtained. Step 4, judging the stability of the reference voltage divider according to the output uncertainty of the reference voltage divider after calibration and the standard output uncertainty of the reference voltage divider. If the output uncertainty of the reference voltage divider after calibration is not greater than the standard output uncertainty of the reference voltage divider, the reference voltage divider is stable and the process proceeds to step 7; otherwise, the process proceeds to step 5; Step 5, obtaining the accuracy of the reference voltage divider according to the output uncertainty of the reference voltage divider after calibration and the standard output uncertainty of the reference voltage divider. If the obtained accuracy of the reference voltage divider is less than the accuracy threshold, proceed to step 6; otherwise, issue a warning message indicating that the reference voltage divider is completely attenuated. Step 6, the management module obtains the output fluctuation range of the reference voltage divider after correction according to the output uncertainty of the reference voltage divider after calibration, and then proceeds to step 7; Step 7: Complete the reference voltage divider calibration.

[0020] The step of obtaining the environmental data of the current calibration environment and performing environmental calibration on the current calibration environment based on the calibration data in the historical calibration database includes: Acquire the calibration features of the current calibration environment, match the calibration data of the corresponding calibration features in the correction data in the historical correction database according to the calibration features, and calibrate the current calibration environment according to the environmental parameters in the calibration data of the corresponding calibration features; wherein the calibration features include dimensional data.

[0021] The method of performing a pre-detection on the reference voltage divider to obtain a pre-detection feature, obtaining an available feature of the reference voltage divider according to historical calibration data, and judging whether the reference voltage divider is available according to the preliminary detection feature and the available feature of the reference voltage divider includes: Perform a pre-detection on the reference voltage divider to obtain the difference between the reference voltage divider output and the standard reference voltage divider output; obtain the calibration range of the reference voltage divider based on historical calibration data; if the difference is within the calibration range of the reference voltage divider, the reference voltage divider is usable, otherwise, it is unusable.

[0022] The thermal stabilization of the reference voltage divider according to the current calibration environment includes: thermally stabilizing the reference voltage divider for a set time in the calibration environment after calibration.

[0023] According to the data output by the reference voltage divider during the calibration process, the calibration module is controlled to calibrate the reference voltage divider, and after the calibration is completed, the output uncertainty of the calibrated reference voltage divider is obtained, including: When the difference between the output of the reference voltage divider and the output of the standard reference voltage divider is adjusted to be smaller than the output difference threshold, the calibration of the reference voltage divider is completed; After the calibration is completed, the output data of a set number of calibrated reference voltage dividers are collected to obtain the fluctuation range of the output data. The sum of the fluctuation range of the output data and the output difference threshold is used to obtain the fluctuation range of the corrected output data, which is the output uncertainty of the calibrated reference voltage divider.

[0024] The method of judging the stability of the reference voltage divider according to the output uncertainty of the reference voltage divider after calibration and the standard output uncertainty of the reference voltage divider includes: If the output uncertainty of the reference voltage divider after calibration is within the range of the standard output uncertainty of the reference voltage divider, the reference voltage divider is stable, otherwise it is unstable.

[0025] The method of obtaining the accuracy of the reference voltage divider according to the output uncertainty of the calibrated reference voltage divider and the standard output uncertainty of the reference voltage divider includes: Among them, the range value of the output uncertainty of the reference voltage divider after calibration is: the range of the output uncertainty of the reference voltage divider after calibration, and the range value of the standard output uncertainty of the reference voltage divider is: the range of the standard output uncertainty of the reference voltage divider.

[0026] like Figure 2 As shown, a control system for reference voltage divider calibration, applying the control method for reference voltage divider calibration, includes a cloud data server, an environment control module, a calibration module, a data processing module, a communication module and a data acquisition module; The environmental control module, calibration module, communication module and data acquisition module are respectively connected to the data processing module; the cloud data server is communicatively connected to the communication module.

[0027] like Figure 3 As shown, the data acquisition module includes an environmental data acquisition device and a test data acquisition device; the environmental data acquisition device and the test data acquisition device are respectively connected to the data processing module.

[0028] Specifically, the control method for reference voltage divider calibration described in the present invention not only includes a basic calibration process, but also incorporates advanced data processing technology and intelligent decision-making mechanism. The specific steps are as follows: Step 1: Environmental Calibration Environmental data acquisition: Through a high-precision sensor array, multi-dimensional environmental data such as temperature, humidity, air pressure, and electromagnetic field strength of the current calibration environment are collected in real time.

[0029] Historical data matching: Establish a huge historical calibration database, which stores the calibration data of reference voltage dividers under different environmental conditions. According to the current environmental data, match the closest calibration record in the database and extract the environmental parameters as the calibration benchmark.

[0030] Environmental adjustment: Based on the matched environmental parameters, the environmental control module is used to automatically adjust the calibration environment to the optimal state to ensure that the calibration process is not disturbed by the external environment.

[0031] Step 2: Pre-test Output difference calculation: Use a high-precision test source to perform preliminary testing on the reference voltage divider to calculate the difference between its output and the standard reference voltage divider output.

[0032] Usability assessment: Combined with the calibration range in the historical calibration data, determine whether the difference is within the acceptable range, thereby evaluating the preliminary usability of the reference voltage divider.

[0033] Decision-making mechanism: If the reference voltage divider is unavailable, the system automatically prompts for replacement, avoiding invalid calibration and improving efficiency.

[0034] Step 3: Thermal Stabilization and Calibration Thermal stabilization: Place the reference voltage divider in a calibrated environment and perform thermal stabilization for a set period of time to ensure that it reaches thermal equilibrium before calibration and reduce the impact of temperature changes on the calibration results.

[0035] Precise calibration: A closed-loop feedback control system is used to dynamically adjust the parameters of the calibration module according to the real-time output difference between the reference voltage divider and the standard source until the difference is less than the preset output difference threshold to achieve high-precision calibration.

[0036] Uncertainty calculation: After calibration, by collecting multiple sets of data, calculating the fluctuation range of the output data, and considering the inherent error of the measurement system, the output uncertainty of the calibrated reference voltage divider is obtained.

[0037] Step 4: Stability Assessment Comparative judgment: Compare the calibrated output uncertainty with the standard output uncertainty of the reference voltage divider. If the former is less than or equal to the latter, the reference voltage divider is considered stable.

[0038] Decision path: If unstable, proceed to the next step of accuracy assessment; if stable, jump directly to step 7 to complete calibration.

[0039] Step 5: Accuracy Assessment Accuracy calculation: Based on a specific algorithm, the accuracy of the reference voltage divider after calibration is calculated. This value reflects the degree of deviation between the calibration result and the ideal state.

[0040] Threshold comparison: Compare the calculated accuracy with the preset accuracy threshold. If it is lower than the threshold, it means that the performance of the reference voltage divider is acceptable and proceed to the next step; otherwise, a complete attenuation warning is issued, indicating that replacement or repair is required.

[0041] Step 6: Determine the output fluctuation range after calibration Fluctuation range calculation: Based on the output uncertainty after calibration, the management module automatically calculates the output fluctuation range after the reference voltage divider is corrected, providing an important reference for subsequent use.

[0042] Step 7: Complete the calibration Calibration report generation: The system automatically generates a detailed calibration report including the calibration process, results and suggestions for easy review and archiving by users.

[0043] Data upload: Calibration results and related data are uploaded to the cloud data server through the communication module to achieve remote access and sharing of data.

[0044] The control system used for reference voltage divider calibration mainly includes the following modules: Cloud data server: used to store, manage and analyze calibration data, supports remote access, and allows users to view calibration records anytime and anywhere.

[0045] Environmental control module: responsible for the precise control of the calibration environment, including the adjustment of parameters such as temperature, humidity, and air pressure to ensure the consistency of calibration conditions.

[0046] Calibration module: The core component that performs calibration operations, achieving high-precision calibration of the reference voltage divider through a high-precision source and closed-loop control algorithm.

[0047] Data processing module: responsible for data collection, processing and analysis, including environmental data matching, calibration process control, uncertainty calculation, etc.

[0048] Communication module: realizes data exchange between modules within the system, as well as communication with cloud data servers to ensure unimpeded information flow.

[0049] Data acquisition module: responsible for collecting various data during the calibration process, including the output of the reference voltage divider, environmental parameters, etc., to provide the original basis for data processing.

[0050] Embodiment 1 In a certain high-precision voltage measurement laboratory, the control system for reference voltage divider calibration described in the present invention is equipped. The system includes a cloud data server, an environmental control module, a calibration module, a data processing module, a communication module and a data acquisition module. The modules are connected through a high-speed communication network to ensure efficient and accurate data transmission. A high-precision sensor array is installed in the laboratory environment to monitor environmental parameters such as temperature, humidity, air pressure and electromagnetic field strength in real time.

[0051] Environmental calibration The high-precision sensor array collects data such as temperature (20±0.1°C), humidity (50±5%RH), air pressure (101.325±0.01kPa) and electromagnetic field strength (<1μT) of the current laboratory environment.

[0052] Match the calibration record closest to the current environment in the historical calibration database and extract the environmental parameters as the calibration benchmark.

[0053] Use the environmental control module to adjust the laboratory environment to match the reference state to ensure consistent environmental conditions during the calibration process.

[0054] Pre-detection A high-precision test source was used to perform preliminary testing on the reference voltage divider to be calibrated, and the output difference with the standard reference voltage divider was measured to be 0.002V.

[0055] Combined with the calibration range (±0.01V) in the historical calibration data, it is judged that the difference is within the acceptable range and the reference voltage divider is preliminarily usable.

[0056] Thermal Stabilization and Calibration The reference voltage divider was placed in the calibrated environment for 2 hours of thermal stabilization.

[0057] A closed-loop feedback control system is used for precise calibration. After multiple iterative adjustments, the output difference between the reference voltage divider and the standard source is reduced to 0.0001V, meeting the preset output difference threshold.

[0058] After the calibration is completed, 100 sets of data are collected and the output uncertainty of the reference voltage divider after calibration is calculated to be 0.0005V.

[0059] Stability assessment Compare the calibrated output uncertainty (0.0005V) with the standard output uncertainty of the reference voltage divider (0.001V) to determine whether the reference voltage divider is stable.

[0060] Complete calibration The system automatically generates a calibration report, including the calibration process, results and suggestions, and uploads it to the cloud data server.

[0061] Users can view and archive calibration reports by remotely accessing the cloud server.

[0062] Embodiment 2 The control system for reference voltage divider calibration described in the present invention is also deployed at a voltage measurement station in an industrial site. Since the industrial site environment is complex and changeable, with strong electromagnetic interference and temperature changes, the calibration work is more challenging.

[0063] Calibration Process Implementation Environmental calibration Collect data such as temperature (25±1°C), humidity (60±10%RH), air pressure (slightly changes with altitude), and electromagnetic field strength (>5μT, beyond the normal range) at the current industrial site.

[0064] The closest calibration record is matched in the historical calibration database, and the influence of electromagnetic interference is considered to extract the corrected environmental parameters as the calibration benchmark.

[0065] Use the environmental control module to adjust the on-site environment to be as close to the baseline state as possible, and enable electromagnetic shielding measures to reduce interference.

[0066] Pre-detection A preliminary test was performed on the reference voltage divider to be calibrated, and the output difference with the standard reference voltage divider was measured to be 0.015V, which is beyond the normal calibration range.

[0067] The system automatically prompts you to replace the reference voltage divider to avoid invalid calibration.

[0068] Thermal stabilization and calibration after replacement After replacing the new reference voltage divider, perform a 3-hour thermal stabilization treatment.

[0069] A closed-loop feedback control system is used for precise calibration. After multiple iterative adjustments, the output difference between the reference voltage divider and the standard source is reduced to 0.0002V.

[0070] After the calibration is completed, 200 sets of data are collected and the output uncertainty of the reference voltage divider after calibration is calculated to be 0.0006V.

[0071] Stability and accuracy assessment Compare the calibrated output uncertainty (0.0006V) with the standard output uncertainty of the reference voltage divider (0.001V) to determine whether the reference voltage divider is stable.

[0072] Further calculation shows that the accuracy of the reference voltage divider after calibration is 94% (calculated according to a specific algorithm), which is higher than the preset accuracy threshold (90%), indicating good performance.

[0073] Output fluctuation range after correction is determined Based on the output uncertainty after calibration, the management module automatically calculates that the output fluctuation range of the reference voltage divider after calibration is ±0.0006V.

[0074] Complete calibration The system automatically generates a calibration report and uploads it to the cloud data server.

[0075] Users can remotely access the cloud server to check the calibration report and adjust the parameter settings for subsequent measurements based on the output fluctuation range.

[0076] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A control method for reference voltage divider calibration, characterized in that The steps include: Step 1: Obtain environmental data of the current calibration environment, perform environmental calibration on the current calibration environment based on the calibration data in the historical calibration database, and proceed to step 2 after the environmental calibration is completed; Step 2: Perform a pre-detection on the reference voltage divider to obtain a pre-detection feature, obtain a usable feature of the reference voltage divider based on historical calibration data, and determine whether the reference voltage divider is usable based on the preliminary detection feature and the usable feature of the reference voltage divider. If it is usable, proceed to step 3; otherwise, replace the reference voltage divider to be calibrated. Step 3: After the calibration environment and equipment are ready, the reference voltage divider is thermally stabilized according to the current calibration environment. After the thermal stabilization is completed, the reference voltage divider is calibrated. According to the data output by the reference voltage divider during the calibration process, the calibration module is controlled to calibrate the reference voltage divider. After the calibration is completed, the output uncertainty of the calibrated reference voltage divider is obtained. Step 4: judging the stability of the reference voltage divider according to the output uncertainty of the reference voltage divider after calibration and the standard output uncertainty of the reference voltage divider. If the output uncertainty of the reference voltage divider after calibration is not greater than the standard output uncertainty of the reference voltage divider, the reference voltage divider is stable, and the process proceeds to step 7. Otherwise, proceed to step five; Step 5, obtaining the accuracy of the reference voltage divider according to the output uncertainty of the reference voltage divider after calibration and the standard output uncertainty of the reference voltage divider. If the obtained accuracy of the reference voltage divider is less than the accuracy threshold, proceed to step 6; otherwise, issue a warning message indicating that the reference voltage divider is completely attenuated. Step 6, the management module obtains the output fluctuation range of the reference voltage divider after correction according to the output uncertainty of the reference voltage divider after calibration, and then proceeds to step 7; Step 7: Complete the reference voltage divider calibration.

2. The control method for reference voltage divider calibration according to claim 1, characterized in that: The step of obtaining the environmental data of the current calibration environment and performing environmental calibration on the current calibration environment based on the calibration data in the historical calibration database includes: Acquire the calibration features of the current calibration environment, match the calibration data of the corresponding calibration features in the correction data in the historical correction database according to the calibration features, and calibrate the current calibration environment according to the environmental parameters in the calibration data of the corresponding calibration features; wherein the calibration features include dimensional data.

3. The control method for reference voltage divider calibration according to claim 2, characterized in that: The method of performing a pre-detection on the reference voltage divider to obtain a pre-detection feature, obtaining an available feature of the reference voltage divider according to historical calibration data, and judging whether the reference voltage divider is available according to the preliminary detection feature and the available feature of the reference voltage divider includes: Perform a pre-detection on the reference voltage divider to obtain the difference between the reference voltage divider output and the standard reference voltage divider output; obtain the calibration range of the reference voltage divider based on historical calibration data; if the difference is within the calibration range of the reference voltage divider, the reference voltage divider is usable, otherwise, it is unusable.

4. The control method for reference voltage divider calibration according to claim 3, characterized in that: The thermal stabilization of the reference voltage divider according to the current calibration environment includes: thermally stabilizing the reference voltage divider for a set time in the calibration environment after calibration.

5. The control method for reference voltage divider calibration according to claim 4, characterized in that: According to the data output by the reference voltage divider during the calibration process, the calibration module is controlled to calibrate the reference voltage divider, and after the calibration is completed, the output uncertainty of the calibrated reference voltage divider is obtained, including: When the difference between the output of the reference voltage divider and the output of the standard reference voltage divider is adjusted to be smaller than the output difference threshold, the calibration of the reference voltage divider is completed; After the calibration is completed, the output data of a set number of calibrated reference voltage dividers are collected to obtain the fluctuation range of the output data. The sum of the fluctuation range of the output data and the output difference threshold is used to obtain the fluctuation range of the corrected output data, which is the output uncertainty of the calibrated reference voltage divider.

6. The control method for reference voltage divider calibration according to claim 5, characterized in that: The method of judging the stability of the reference voltage divider according to the output uncertainty of the reference voltage divider after calibration and the standard output uncertainty of the reference voltage divider includes: If the output uncertainty of the reference voltage divider after calibration is within the range of the standard output uncertainty of the reference voltage divider, the reference voltage divider is stable, otherwise it is unstable.

7. The control method for reference voltage divider calibration according to claim 1, characterized in that: The method of obtaining the accuracy of the reference voltage divider according to the output uncertainty of the calibrated reference voltage divider and the standard output uncertainty of the reference voltage divider includes: Among them, the range value of the output uncertainty of the calibrated reference voltage divider is: the range of the output uncertainty of the calibrated reference voltage divider, and the range value of the standard output uncertainty of the reference voltage divider is: the range of the standard output uncertainty of the reference voltage divider.

8. A control system for reference voltage divider calibration, characterized in that A control method for reference voltage divider calibration according to any one of claims 1 to 7 is applied, comprising a cloud data server, an environmental control module, a calibration module, a data processing module, a communication module and a data acquisition module; The environmental control module, calibration module, communication module and data acquisition module are respectively connected to the data processing module; the cloud data server is communicatively connected to the communication module.

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