Voltage transformer vehicle-mounted verification device and verification method

Abstract

The invention relates to a voltage transformer vehicle-mounted verification device and a verification method. The voltage transformer vehicle-mounted verification device comprises a dynamic buffer mechanism arranged at the bottom of a verification device body. The dynamic buffering mechanism comprises a limiting frame, a first supporting arm, a second supporting arm and a fixing base which form a four-connecting-rod structure, the outer wall of the first supporting arm and the outer side of the second supporting arm are fixedly connected with mounting bases, and a buffering spring is rotationally connected between every two adjacent mounting bases; the fixing bases of the dynamic buffering mechanisms are jointly connected to a supporting plate, the limiting frame is triangular, and two supporting legs below the triangular limiting frame are connected with buffering bottom pads. According to the invention, by arranging the dynamic buffer mechanism, the stability of equipment in a vehicle-mounted environment is improved, vibration and impact generated in a vehicle driving process are effectively absorbed, and the influence of vibration on verification precision is avoided, so that the stability and accuracy of measured data are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of calibration equipment, and in particular to a vehicle-mounted calibration device and a calibration method for a voltage transformer. Background Art

[0002] As a key device in the power system, the voltage transformer has the main function of converting high voltage into low voltage for use by measurement, protection and control equipment. In order to ensure the safe operation of the power system, it is very necessary to regularly calibrate the performance of the voltage transformer. However, in practical applications, voltage transformers are usually distributed in various substations, high-voltage transmission lines and other difficult-to-access field environments. Traditional fixed calibration devices are limited by the site and cannot flexibly meet the calibration needs of multiple scenarios, especially calibration work in remote and complex environments, which puts higher requirements on efficiency and accuracy. In response to the above problems, vehicle-mounted voltage transformer calibration devices have emerged. The vehicle-mounted calibration device uses the mobility and flexibility of the vehicle to quickly reach the calibration site. It is suitable for a wide range of power system application scenarios, especially in remote areas and harsh environments far away from the laboratory, which can significantly improve the convenience and efficiency of calibration work.

[0003] For example, the patent publication number CN113267743A discloses a "calibration method and calibration instrument for a DC voltage transformer". The calibration instrument includes a human-computer interaction module for sending output parameters and control commands to an error calculation module; an error calculation module for controlling a standard voltage source to output a first voltage value according to the output parameters and control commands; a standard voltage source for inputting the first voltage value into the DC voltage transformer to be tested so that it outputs a corresponding voltage signal; a front-end conditioning circuit for converting the voltage signal; an AD sampling and measurement module for calculating a second voltage value corresponding to the conversion signal and sending it to the error calculation module; the error calculation module is also used to calculate the error of the DC voltage transformer to be tested based on the first voltage value and the second voltage value; it can output a high voltage signal of a DC voltage and superimposed ripple, and perform a frequency performance test on the transformer, and has the advantages of small size, high accuracy, good stability, and strong practicality. However, traditional calibration devices are usually fixed to the vehicle body with tools such as straps. In the vehicle environment, the vibration and impact of the vehicle during driving will be directly transmitted to the device body, which can easily cause the equipment to loosen and data collection to be unstable, thereby affecting the calibration accuracy. Traditional voltage transformer calibration devices are usually fixed and difficult to adapt to complex on-site calibration needs. For example, in high-voltage transmission line scenarios far away from power laboratories or in harsh environments, calibration work is very inconvenient. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a vehicle-mounted calibration device and a calibration method for a voltage transformer to solve the above problems.

[0005] The present invention provides the following technical solutions: A vehicle-mounted calibration device for a voltage transformer, comprising a dynamic buffer mechanism arranged at the bottom of a calibration device body; The dynamic buffer mechanism comprises a limit frame, a support arm 1, a support arm 2 and a fixed seat constituting a four-bar structure, the outer wall of the support arm 1 and the outer side of the support arm 2 are fixedly connected with a mounting seat, and a buffer spring is rotatably connected between two adjacent mounting seats; The fixing seats of each group of the dynamic buffer mechanisms are commonly connected to the support plate, the limiting frame is triangular, and the two legs below the triangular limiting frame are both connected to a buffer bottom pad.

[0006] Preferably, the support plate is connected to the verification device body via a quick release mechanism; The quick-release mechanism includes a bearing plate fixedly connected to the top of the support plate and a connecting plate fixedly connected to the bottom of the verification device body. Two groups of parallel locking plates are arranged at the bottom of the connecting plate, and locking grooves are opened on the locking plates. Two groups of movable supports driven to move in opposite directions by a screw transmission structure are installed on the bearing plate. Locking rods are fixedly connected to the sides of the two groups of movable supports close to each other, and the size of the locking groove matches the size of the locking rod and is used in conjunction with it.

[0007] Preferably, the screw transmission structure includes two groups of external fixing plates fixed on the bearing plate, a screw is rotatably connected between the two groups of external fixing plates, and the two groups of movable supports are respectively threadedly connected to the left and right parts of the screw and the thread directions are opposite.

[0008] Preferably, a handle is installed at one end of the screw rod.

[0009] Preferably, an operation panel is provided in the middle of the inner wall of the calibration device body, a data storage module and a measurement module are provided in sequence on one side of the operation panel, and a power supply module is provided on the other side of the operation panel.

[0010] Preferably, a test interface is provided on the top of the inner wall of the calibration device body, a calibrator connection interface is provided on one side of the power module, and a data acquisition module is provided on one side of the calibrator connection interface.

[0011] Preferably, an acceleration sensor is installed on the buffer spring.

[0012] A calibration method for a voltage transformer vehicle-mounted calibration device, applied to the calibration device, comprises the following steps: S1: Device preparation and calibration environment inspection, check whether the dynamic buffer mechanism of the calibration device is in a stable state, confirm that the vehicle-mounted platform is level and has no obvious vibration, check whether the locking rod and locking slot of the quick release mechanism are firmly fixed, ensure that the calibration device is firmly installed, and the calibration environment must meet the electrical calibration requirements, such as temperature, humidity and electromagnetic interference conditions, to ensure calibration accuracy; S2: Connect the calibration equipment and input parameters, connect the primary side of the voltage transformer to be calibrated to the test interface of the calibration device body, and confirm that the connection is stable, connect the calibrator connection interface of the calibration device body to the external calibration equipment, start the power module, check the stability of current, voltage and other parameter inputs, and input the relevant calibration parameters of the transformer through the operation panel, including voltage level and frequency; S3: Verify data acquisition, start the data acquisition module and the measurement module, simulate the operating status of the voltage transformer under actual working conditions, measure the voltage values ​​and related electrical parameters on the primary and secondary sides, and the data storage module records the measured data in real time to ensure that there is no signal loss during the data acquisition process, and observe whether the operation panel displays abnormal data; S4: Compare the collected primary and secondary voltage values ​​with the standard reference values, start the dynamic calibration function, adjust the measurement module settings of the calibration device, check for errors caused by voltage fluctuations or other environmental interference, and ensure that the errors are within the standard range. For voltage transformers that do not meet the standards, record the detailed calibration status and mark the reasons. S5: Verification result analysis, comparing the data recorded in the data storage module with the standard verification value, analyzing whether the error value of the voltage transformer is within the allowable range, and recording a detailed verification report for the transformer with an error exceeding the standard, and marking it on the panel; S6: Output and storage of calibration data: export the calibration result data through the operation panel, generate a detailed calibration report and upload it to the data storage module. After the calibration is completed, disconnect the calibration device body from the transformer. S7: Equipment maintenance, check whether the support plate, buffer spring and other parts in the buffer mechanism are intact, confirm the seismic performance of the dynamic buffer mechanism, perform functional tests on the operation panel, data storage module and measurement module, clean dust and dirt, update the measurement module software version of the calibration device body, ensure the accuracy of data collection and storage, if damaged or reduced precision parts are found, replace them in time and record the maintenance status.

[0013] Preferably, in S1, the vibration data of the verification device during the vehicle driving process is collected in real time by an acceleration sensor; Preprocess the vibration data a(t) and set the threshold A 阈值 ,like , marked as normal data a 正常 ;like , marked as abnormal data a 异常 ; Calculate the RMS value of normal data 正常 : ; Extracting peaks from abnormal data ; Calculate the duration ratio of abnormal data ; Calculate the comprehensive index I: ; Among them, w1, w2 and w3 are the effective values ​​RMS 正常 , the peak value P in the abnormal data 峰 And the weight coefficient of the duration of abnormal data D; Set alarm threshold I 阈值 , if I>I 阈值 An alarm signal is issued, and the calibration device body (1) needs to be calibrated.

[0014] Preferably, the abnormal data is screened out with a value greater than 0.9P 峰 data; Arrange the abnormal data in ascending order according to the time index; Use entropy method to measure greater than 0.9P 峰 The concentration of data in abnormal data D; Adjust w2 and w3 by concentration D; ; ; w1=1-w2-w3; in, is a constant.

[0015] The present invention has the following beneficial technical effects: The present invention realizes efficient calibration in a vehicle-mounted environment and improves the stability of the equipment by setting a dynamic buffer mechanism, effectively absorbs the vibration and impact generated during vehicle driving, avoids the influence of vibration on calibration accuracy, and thus ensures the stability and accuracy of measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the present invention from a first viewing angle; Figure 2 It is a schematic diagram of the structure of the calibration device of the present invention; Figure 3 It is a schematic diagram of the structure of the second viewing angle of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 It is a structural exploded view of the support plate part of the present invention; Figure 6 It is a schematic diagram of the process of the present invention.

[0017] The reference numerals in the figure are: 1. Calibration device body; 2. Dynamic buffer mechanism; 201. Support plate; 202. Limiting frame; 203. Support arm one; 204. Support arm two; 205. Buffer spring; 206. Mounting seat; 207. Fixed seat; 208. Buffer base pad; 3. Quick release mechanism; 301. Connecting plate; 302. Moving support; 303. Screw rod; 304. Locking plate; 305. External fixing plate; 306. Locking rod; 307. Locking groove; 308. Loading plate; 4. Operation panel; 5. Test interface; 6. Measurement module; 7. Power module; 8. Data acquisition module; 9. Data storage module; 10. Calibrator connection interface; 11. Handle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: A vehicle-mounted calibration device for a voltage transformer comprises a calibration device body 1. A dynamic buffer mechanism 2 is provided at the bottom of the calibration device body 1. The dynamic buffer mechanism 2 comprises a support plate 201, a limit frame 202, an arm 1 203, an arm 204, a buffer spring 205, a mounting seat 206, a fixed seat 207 and a buffer bottom pad 208. The inner side of the limit frame 202 is rotatably connected to the arm 1 203 and the arm 2 204 respectively, the outer wall of the arm 1 203 and the outer side of the arm 2 204 are both fixedly connected to the mounting seat 206, a buffer spring 205 is rotatably connected between two adjacent mounting seats 206, and one end of the arm 1 203 and one end of the arm 2 204 are rotatably connected to the fixed seat 207; thereby, the limit frame 202, the arm 1 203, the arm 204 and the fixed seat 207 form a movable four-bar structure.

[0020] A quick release mechanism 3 is provided at the top of the dynamic buffer mechanism 2, and the quick release mechanism 3 includes a connecting plate 301, a movable support 302, a screw rod 303, a locking plate 304, an outer fixed plate 305, a locking rod 306, a locking groove 307 and a bearing plate 308. The top of the bearing plate 308 is slidably connected to two movable supports 302, and the inner sides (the sides close to each other) of the two movable supports 302 are fixedly connected with locking rods 306.

[0021] The limiting frame 202 has a triangular structure and is more stable. The two bottom ends of the limiting frame 202 are fixedly connected to the buffer pads 208 , and the top end of the fixing seat 207 is fixedly connected to the support plate 201 .

[0022] The buffer base pad 208 is made of high-strength wear-resistant material and has excellent anti-vibration and shock-absorbing properties. It can effectively absorb the vibration and impact force during the driving of the vehicle and protect the calibration device body 1 from external vibration.

[0023] The bottom end of the bearing plate 308 is fixedly connected to the top end of the support plate 201 , and the left and right parts of the screw rod 303 are respectively threadedly connected to the two movable supports 302 in opposite directions.

[0024] The sliding fit design between the movable support 302 and the supporting plate 308 enables the device to quickly adapt to different installation requirements without complicated operations, thereby improving the working efficiency of the device. A rotating handle 11 is provided at one end of the screw rod 303, and the user can quickly adjust the position of the movable support 302 by manual adjustment, thereby realizing the rapid installation, fixation and disassembly of the verification device body 1.

[0025] Both ends of the screw rod 303 are rotatably connected to two sets of outer fixing plates 305 , the inner sides of the two outer fixing plates 305 are respectively fixedly connected to the two side walls of the bearing plate 308 , and the handle 11 is fixedly connected to one end of the screw rod 303 .

[0026] The user can easily adjust the position of the screw rod 303 by manually rotating the handle 11 , thereby controlling the relative position of the carrying plate 308 and the movable support 302 .

[0027] The top of the connecting plate 301 is fixedly connected to the bottom of the verification device body 1 , and the bottom of the connecting plate 301 is fixedly connected to two locking plates 304 . The inner sides of the two locking plates 304 are provided with locking grooves 307 , and the size of the locking grooves 307 matches the size of the locking rod 306 .

[0028] The locking groove 307 is precisely machined to perfectly match the size of the locking rod 306, ensuring a tight fit when locked and avoiding loosening or deviation due to vehicle vibration. The design of the locking groove 307 not only increases the security of the connection, but also facilitates the rapid installation and disassembly of the verification device body 1, further improving operational efficiency and equipment adaptability.

[0029] An operation panel 4 is arranged in the middle of the inner wall of the calibration device body 1 , a data storage module 9 and a measurement module 6 are arranged in sequence on one side of the operation panel 4 , and a power supply module 7 is arranged on the other side of the operation panel 4 .

[0030] An operation panel 4 is provided in the middle of the inner wall of the calibration device body 1. A data storage module 9 and a measurement module 6 are arranged in sequence on one side of the panel, which facilitates the user to operate intuitively and view the calibration data in real time. A power module 7 is designed on the other side to provide stable power support for the entire device.

[0031] A test interface 5 is provided at the top of the inner wall of the calibration device body 1 , a calibrator connection interface 10 is provided at one side of the power module 7 , and a data acquisition module 8 is provided at one side of the calibrator connection interface 10 .

[0032] A standardized test interface 5 is designed on the top of the calibration device body 1 to facilitate the connection operation with the voltage transformer. A calibrator connection interface 10 is provided on one side of the power module 7 for access to external calibration equipment. A data acquisition module 8 is also provided to ensure rapid capture and real-time recording of calibration data, thereby improving calibration efficiency and accuracy.

[0033] A calibration method for a voltage transformer vehicle-mounted calibration device comprises the following steps: S1: Device preparation and calibration environment inspection, check whether the dynamic buffer mechanism 2 of the calibration device body 1 is in a stable state, confirm that the vehicle-mounted platform is level and has no obvious vibration influence, check whether the locking rod 306 and the locking slot 307 of the quick release mechanism 3 are firmly fixed, ensure that the calibration device body 1 is firmly installed, and the calibration environment must meet the electrical calibration requirements, such as temperature, humidity and electromagnetic interference conditions, to ensure the calibration accuracy; S2: Connect the calibration equipment and input parameters, connect the primary side of the voltage transformer to be calibrated to the test interface 5 of the calibration device body 1, and confirm that the connection is stable, connect the calibrator connection interface 10 of the calibration device body 1 to the external calibration equipment, start the power module 7, check the stability of the current, voltage and other parameter inputs, and input the relevant calibration parameters of the transformer through the operation panel 4, including voltage level and frequency; S3: Verify data acquisition, start the data acquisition module 8 and the measurement module 6, simulate the operating state of the voltage transformer under actual working conditions, measure the voltage values ​​and related electrical parameters of the primary and secondary sides, and the data storage module 9 records the measured data in real time to ensure that there is no signal loss during the data acquisition process, and observe whether the operation panel 4 displays abnormal data; S4: Compare the collected primary and secondary voltage values ​​with the standard reference values, start the dynamic calibration function, adjust the measurement module 6 settings of the calibration device body 1, check for errors caused by voltage fluctuations or other environmental interference, ensure that the errors are controlled within the standard range, and record the detailed calibration status of the voltage transformer that does not meet the standard, and mark the reasons; S5: Verification result analysis, comparing the data recorded in the data storage module 9 with the standard verification value, analyzing whether the error value of the voltage transformer is within the allowable range, and for the transformer with an error exceeding the standard, recording a detailed verification report and marking it on the panel; S6: Verification data output and storage, the verification result data is exported through the operation panel 4, a detailed verification report is generated and uploaded to the data storage module 9, and the connection between the verification device body 1 and the mutual inductor is disconnected after the verification is completed.

[0034] S7: Equipment maintenance, check whether the support plate 201, buffer spring 205 and other components in the buffer mechanism are intact, confirm the seismic performance of the dynamic buffer mechanism 2, perform functional tests on the operation panel 4, data storage module 9 and measurement module 6, clean dust and dirt, update the software version of the measurement module 6 of the calibration device body 1, ensure the accuracy of data collection and storage, if damaged or reduced precision parts are found, replace them in time and record the maintenance status.

[0035] When working, the dynamic buffer mechanism 2 includes a support plate 201, a limit frame 202, a support arm, a buffer spring 205 and other structures. Its core function is to absorb the vibration and impact generated during the vehicle's driving. The limit frame 202 provides initial support. The support arm 1 203 and the support arm 204 are connected by rotation and linked to the buffer spring 205. When the vehicle vibrates, the impact energy is absorbed by elastic deformation. The buffer base pad 208 further reduces subtle vibrations to ensure that the device remains stable under various working conditions, thereby avoiding the influence of vibration on the measurement accuracy. The quick release mechanism 3 is connected by The main purpose of the present invention is to realize the rapid installation and disassembly of the calibration device body 1 and ensure the reliable fixation of the device. The movable support 302 can quickly adjust the horizontal state of the device through the sliding connection with the bearing plate 308 and the thread adjustment of the screw 303. The locking plate 304 and the locking rod 306 are firmly fixed through the precise matching of the locking groove 307, which effectively prevents the device from loosening or deflecting under dynamic working conditions. The overall design is designed to be stable and stable when working through the dynamic buffer mechanism. 2 absorbs vehicle vibration in real time, and uses the quick-release mechanism 3 to flexibly adapt to different vehicle-mounted platforms, thereby improving the stability, mobility and ease of use of the equipment, thereby ensuring the accuracy of the measurement data and the efficient completion of the verification work, and providing reliable support for the on-site detection of the voltage transformer. The present invention sets a data acquisition module 8 and a measurement module 6 in the verification device body 1, which can efficiently capture the electrical parameters of the primary and secondary sides of the voltage transformer, record and store them in the data storage module 9 in real time, ensure data integrity, and avoid the error problem caused by signal loss in the traditional verification process. The operation panel 4 of the verification device body 1 is reasonably designed. Combined with the calibrator connection interface 10 and the test interface 5, the user can quickly complete the connection and parameter input of the voltage transformer, significantly reducing the complexity of operation. The real-time collection and error analysis function of the verification data enables the user to quickly obtain the verification results and generate a detailed verification report, which improves the efficiency and reliability of the verification work. After the verification task is completed, combined with the continuous operation of the dehumidification mechanism and the overall sealing design, the durability of the verification device body 1 is effectively guaranteed.

[0036] At the same time, the quick-release mechanism makes the installation and disassembly process of the device more convenient through connecting plates, movable supports, screws and locking plates, significantly improves the operating efficiency, and adapts to the use requirements of different vehicle platforms. In addition, the design of the locking structure further enhances the fixing effect of the equipment and provides reliable support and safety under dynamic conditions. Users can quickly complete the installation, disassembly and adjustment of the calibration device body on different vehicle platforms or working environments, which significantly improves the flexibility of equipment movement and the efficiency of calibration work, and provides reliable support for on-site detection of voltage transformers.

[0037] By setting up a data acquisition module and a measurement module in the calibration device body, the electrical parameters of the primary and secondary sides of the voltage transformer can be quickly captured, recorded in real time and stored in the data storage module to ensure data integrity, avoiding the error problem caused by signal loss in the traditional calibration process. At the same time, the operation panel in the calibration device body is reasonably laid out. Combined with the calibrator connection interface and the test interface, the user can quickly complete the connection and parameter input of the transformer, reducing the complexity of operation. In addition, through the real-time collection and error analysis functions of the calibration data, the user can quickly obtain the calibration results and generate a detailed calibration report, which improves the efficiency and reliability of the calibration work. After the calibration task is completed, the dehumidification mechanism and sealing design effectively ensure the durability of the calibration device body, extend the service life of the calibration device body, and provide reliable technical support for practical applications.

[0038] Embodiment 2: Contains all the contents of Embodiment 1: An acceleration sensor is installed on at least one of the buffer springs 205 , and the acceleration sensor is used to collect vibration data (acceleration) of the verification device during vehicle driving in real time.

[0039] Preprocess the vibration data a(t) and set the threshold A 阈值 ,like , marked as normal data a 正常 ;like , marked as abnormal data a 异常 ; Calculate the RMS value of normal data 正常 : ; Extracting peaks from abnormal data ; Calculate the duration ratio of abnormal data ; Calculate the comprehensive index I: ; Among them, w1, w2 and w3 are the effective values ​​RMS 正常 , the peak value P in the abnormal data 峰 And the weight coefficient of the duration of abnormal data D; Set alarm threshold I 阈值 , if I>I 阈值 An alarm signal is issued, indicating that the vibration caused by driving at this time will affect the accuracy of the verification device body 1, and the verification device body 1 needs to be calibrated and reset.

[0040] Furthermore, the abnormal data with a value greater than 0.9P 峰 The data are all set as the peak value P峰 ; Arrange the abnormal data in ascending order according to the time index; Use entropy method to measure greater than 0.9P 峰 The concentration D of the data in the abnormal data; other methods can also be used to calculate the concentration greater than 0.9P 峰 The concentration of data in abnormal data is D.

[0041] Adjust w2 and w3 by concentration D; ; ; w1=1-w2-w3; in, is a constant.

[0042] Entropy value method measures greater than 0.9P 峰 The process of the concentration D of the data in the abnormal data is as follows: Divide the interval: Divide the abnormal data sequence into K non-overlapping intervals in chronological order; Statistical frequency: Count the frequency greater than 0.9P in each interval 峰 The number of data n k , and calculate its frequency , where M is the number of abnormal data, k=1, 2, ..., K; Calculate entropy value: According to the entropy calculation formula ; In order to make the concentration D positively correlated with the degree of concentration, the concentration can be defined as The closer the value of D is to 1, the greater the value is, the greater the P 峰 The more concentrated the data is.

[0043] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A voltage transformer vehicle-mounted calibration device, comprising a dynamic buffer mechanism (2) arranged at the bottom of a calibration device body (1), characterized in that: The dynamic buffer mechanism (2) comprises a limit frame (202), a support arm 1 (203), a support arm 2 (204) and a fixed seat (207) constituting a four-bar linkage structure; the outer wall of the support arm 1 (203) and the outer side of the support arm 2 (204) are both fixedly connected with a mounting seat (206); a buffer spring (205) is rotatably connected between two adjacent mounting seats (206); the fixed seats (207) of each group of the dynamic buffer mechanism (2) are commonly connected to the support plate (201); the limit frame (202) is triangular in shape; and two legs below the triangular limit frame (202) are both connected with a buffer bottom pad (208).

2. A voltage transformer vehicle-mounted calibration device according to claim 1, characterized in that: The support plate (201) is connected to the calibration device body (1) via a quick-release mechanism (3); The quick-release mechanism (3) comprises a bearing plate (308) fixedly connected to the top of the support plate (201), and a connecting plate (301) fixedly connected to the bottom of the verification device body (1); two groups of parallel locking plates (304) are arranged at the bottom of the connecting plate (301); the locking plates (304) are provided with locking grooves (307); two groups of movable supports (302) driven to move in opposite directions by a screw transmission structure are mounted on the bearing plate (308); the two groups of movable supports (302) are fixedly connected to a locking rod (306) on one side close to each other; the size of the locking groove (307) matches the size of the locking rod (306) and is used in conjunction with it.

3. A voltage transformer vehicle-mounted calibration device according to claim 2, characterized in that: The screw transmission structure comprises two groups of external fixing plates (305) fixed on a bearing plate (308), a screw (303) being rotatably connected between the two groups of external fixing plates (305), and two groups of movable supports (302) being respectively threadedly connected to the left and right parts of the screw (303) with the thread directions being opposite.

4. A voltage transformer vehicle-mounted calibration device according to claim 3, characterized in that: A handle (11) is mounted on one end of the screw rod (303).

5. A voltage transformer vehicle-mounted calibration device according to claim 1, characterized in that: An operation panel (4) is arranged in the middle of the inner wall of the calibration device body (1), a data storage module (9) and a measurement module (6) are arranged in sequence on one side of the operation panel (4), and a power supply module (7) is arranged on the other side of the operation panel (4).

6. A voltage transformer vehicle-mounted calibration device according to claim 5, characterized in that: A test interface (5) is provided at the top of the inner wall of the calibration device body (1), a calibrator connection interface (10) is provided on one side of the power module (7), and a data acquisition module (8) is provided on one side of the calibrator connection interface (10).

7. A voltage transformer vehicle-mounted calibration device according to claim 1, characterized in that: An acceleration sensor is installed on the buffer spring (205).

8. A calibration method for a voltage transformer vehicle-mounted calibration device, characterized in that: The verification device according to claim 7 comprises the following steps: S1: Device preparation and calibration environment inspection, check whether the dynamic buffer mechanism (2) of the calibration device body (1) is in a stable state, confirm that the vehicle-mounted platform is level and has no obvious vibration influence, check whether the locking rod (306) and the locking groove (307) of the quick release mechanism (3) are firmly fixed, ensure that the calibration device body (1) is firmly installed, and the calibration environment must meet the electrical calibration requirements, such as temperature, humidity and electromagnetic interference conditions, to ensure the calibration accuracy; S2: Connect the calibration equipment and input parameters, connect the primary side of the voltage transformer to be calibrated to the test interface (5) of the calibration device body (1), and confirm that the connection is stable, connect the calibrator connection interface (10) of the calibration device body (1) to the external calibration equipment, start the power module (7), check the stability of the current, voltage and other parameter inputs, and input the relevant calibration parameters of the transformer, including voltage level and frequency, through the operation panel (4); S3: Verify data acquisition, start the data acquisition module (8) and the measurement module (6), simulate the operating state of the voltage transformer under actual working conditions, measure the voltage values ​​and related electrical parameters of the primary and secondary sides, and the data storage module (9) records the measured data in real time to ensure that there is no signal loss during the data acquisition process, and observe whether the operation panel (4) displays abnormal data; S4: Compare the collected primary and secondary voltage values ​​with the standard reference values, start the dynamic calibration function, adjust the measurement module (6) settings of the calibration device body (1), check for errors caused by voltage fluctuations or other environmental interference, ensure that the errors are controlled within the standard range, and record the detailed calibration status of the voltage transformer that does not meet the standard and mark the reasons; S5: Analyze the calibration results, compare the data recorded in the data storage module (9) with the standard calibration value, analyze whether the error value of the voltage transformer is within the allowable range, and record a detailed calibration report for the transformer with an error exceeding the standard, and mark it on the panel; S6: output and storage of calibration data, exporting calibration result data through the operation panel (4), generating a detailed calibration report and uploading it to the data storage module (9), and disconnecting the calibration device body (1) from the transformer after the calibration is completed; S7: Equipment maintenance: Check whether the support plate (201), buffer spring (205) and other parts in the buffer mechanism are intact, confirm the anti-seismic performance of the dynamic buffer mechanism (2), perform functional tests on the operation panel (4), data storage module (9) and measurement module (6), clean dust and dirt, update the software version of the measurement module (6) of the calibration device body (1), ensure the accuracy of data collection and storage, and replace any damaged or reduced-precision parts in a timely manner and record the maintenance status.

9. A calibration method for a voltage transformer vehicle-mounted calibration device according to claim 8, characterized in that: In S1, the vibration data of the verification device during the vehicle driving process is collected in real time through the acceleration sensor; Preprocess the vibration data a(t) and set the threshold A 阈值 ,like , marked as normal data a 正常 ;like , marked as abnormal data a 异常 ; Calculate the RMS value of normal data 正常 : ； Extracting peaks from abnormal data ; Calculate the duration ratio of abnormal data ; Calculate the comprehensive index I: ； Among them, w1, w2 and w3 are the effective values ​​RMS 正常 , the peak value P in the abnormal data 峰 And the weight coefficient of the duration of abnormal data D; Set alarm threshold I 阈值 , if I>I 阈值 An alarm signal is issued, and the calibration device body (1) needs to be calibrated.

10. A calibration method for a voltage transformer vehicle-mounted calibration device according to claim 9, characterized in that: Filter out abnormal data with a value greater than 0.9P 峰 data; Arrange the abnormal data in ascending order according to the time index; Use entropy method to measure greater than 0.9P 峰 The concentration of data in abnormal data D; Adjust w2 and w3 by concentration D; ； ； w1=1-w2-w3; in, is a constant.

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