High-speed maglev track special measuring table and measuring method

Abstract

This invention discloses a dedicated measuring stand and method for high-speed maglev tracks, belonging to the field of high-speed maglev track engineering measurement technology. This invention solves the problems of existing equipment being costly and complex to operate, lacking dedicated static measuring tools suitable for rapid on-site testing and with strong environmental adaptability, thus failing to meet the real-time data requirements for daily track inspections and fine adjustments. The invention achieves rapid assembly and disassembly of the track measuring stand through a magnetic base. Its composite structure of high-strength alloy hard aluminum profile and tool steel balances high rigidity and lightweight, avoiding deformation that affects accuracy and facilitating handling. Before measurement, a standard sample is used for calibration to unify the benchmark, ensuring consistent, repeatable, and traceable results. The stand is equipped with four 0.01mm precision electronic dial gauges that simultaneously collect data, and combined with dedicated formulas, quickly calculates indicators, resulting in high measurement efficiency, sub-millimeter level measurement capabilities, and independence from environmental conditions such as line of sight and lighting, adapting to the complex testing needs of tracks.

Description

Technical Field

[0001] This invention relates to the field of measurement technology for high-speed maglev track engineering, specifically to a dedicated measuring frame and measurement method for high-speed maglev tracks. Background Technology

[0002] As a key development direction for future ultra-high-speed ground transportation, high-speed maglev transportation, with its contactless operation, places sub-millimeter-level demands on the local geometric accuracy of the track system. Tiny deviations in track smoothness are amplified dramatically at high speeds, triggering track-vehicle coupled vibrations and impacting train safety and passenger comfort. Currently, methods for measuring the smoothness of high-speed maglev tracks mainly include optical instrument measurement, chord measurement, and inertial reference methods. Optical instrument measurement, based on the CPIII measurement control network, has high requirements for visibility, lighting, and vibration conditions, resulting in low measurement efficiency. Chord measurement has low accuracy, and the measured waveform does not match the actual track irregularities, requiring complex inversion calculations. The inertial reference method is a dynamic measurement, and the results are related to the speed of the track inspection vehicle, failing to accurately reflect the static local accuracy of the track.

[0003] The local accuracy of high-speed maglev tracks is usually characterized by geometric shape and position parameters, mainly including two major indicators: NGK (track smoothness index) and OFFSET (track offset index) between unit components. These two indicators are used to measure and control various functional surfaces of the track, such as the sliding surface (≤0.6), the guide surface (≤1.0), and the stator surface (≤0.6). However, current measurements mainly rely on imported high-precision total stations. Conventional total stations are expensive and complex to operate, and there is a lack of dedicated static measurement tools that are suitable for rapid on-site testing and have strong environmental adaptability, making it difficult to meet the real-time data requirements for daily track inspection and fine adjustment.

[0004] Therefore, in order to meet the existing needs, a special measuring frame and measuring method for high-speed maglev tracks are proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a dedicated measuring frame and method for high-speed maglev tracks. The measuring frame is quickly fixed and disassembled using a magnetic base, eliminating the need for complex on-site calibration and allowing for operation by a single person. Furthermore, the measuring frame employs a composite structure of high-strength alloy hard aluminum profiles and tool steel, balancing high rigidity and lightweight design. This prevents frame deformation from affecting measurement accuracy and facilitates on-site handling and operation. Standard samples are used to achieve pre-measurement calibration and benchmark unification, ensuring the consistency, repeatability, and traceability of measurement results, accurately reflecting changes in indicators before and after track adjustments. Four electronic dial gauges are used to simultaneously collect data. According to reports, by combining specialized formulas to quickly calculate indicators, measurement efficiency is greatly improved, making it suitable for rapid on-site testing and daily inspections. Meanwhile, the dial indicator of the track measuring stand has an accuracy of 0.01mm, allowing the accuracy of the reference surface between the standard sample and the track measuring stand to be controlled within 0.04mm, achieving sub-millimeter-level measurement and accurately capturing minute deviations in the track, meeting the accuracy requirements of high-speed maglev tracks. Furthermore, it does not rely on environmental conditions such as line of sight and lighting, overcoming the environmental limitations of optical instrument measurements. It can be used in complex working conditions such as track unit joints, high-frequency vibration sections, and easily worn areas, solving the problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A special measuring frame for high-speed maglev tracks includes: a track measuring frame, with two magnetic bases symmetrically arranged at both ends of the track measuring frame; four electronic dial indicators are mounted on the base of the track measuring frame, which are used to simultaneously measure error data at four points on the track measuring frame; and a standard sample is also provided on the track measuring frame, which is compatible with the base of the track measuring frame.

[0007] Furthermore, it also includes: The indicator reading and marking module is configured to read the measured values ​​of four electronic dial gauges after they have stabilized during high-speed maglev track measurement and mark them sequentially. The index calculation and judgment module is configured to calculate the track smoothness index NGK and the track offset index OFFSET based on the measured data of the electronic dial gauge, and compare them with the accuracy standard values ​​of different track functional surfaces to determine whether the local accuracy of the track meets the standard and evaluate the effect of the beam adjustment work. The result output module is configured to output judgment result information based on the judgment result, which includes: track functional surface type, measured track smoothness index NGK value, NGK standard limit, measured track offset index OFFSET value, OFFSET standard limit, accuracy compliance status, and beam adjustment work effect evaluation conclusion.

[0008] Furthermore, the evaluation rule for determining whether the local accuracy of the track meets the standard in the index calculation and judgment module is as follows: If the measured track smoothness index NGK value is less than or equal to the standard limit, and the measured track offset index OFFSET value is less than or equal to the standard limit, then the track local accuracy is deemed to meet the standard and the beam adjustment work is effective. If the measured track smoothness index NGK value is greater than the standard limit, or the measured track offset index OFFSET value is greater than the standard limit, it is determined that the track local accuracy is not up to standard, and the items exceeding the standard must be clearly marked.

[0009] Furthermore, the standard sample is provided with two positioning reference surfaces and four dial indicator reference surfaces. The positioning reference surfaces of the standard sample match the magnetic base surface on the track measuring instrument frame, and the dial indicator reference surfaces of the standard sample correspond to the positions of the electronic dial indicator probes on the track measuring instrument frame.

[0010] Furthermore, the magnetic base is equipped with a magnetic button, and the reference surfaces of the two magnetic bases are on the same plane with a flatness error of no more than 0.04 mm and an error range of ±0.02 mm.

[0011] The measurement method for a dedicated measuring stand for high-speed maglev tracks includes the following steps: Step 1: Attach the magnetic base surfaces at both ends of the track measuring table frame to the positioning reference surface of the standard sample, and press the magnetic button to make the track measuring table frame and the standard sample adhere and fix together. Step 2: Adjust each of the four electronic dial indicators to the 0 position, controlling the pointer compression of the electronic dial indicators to about 0.5mm. Step 3: After the track measurement frame has been calibrated to 0, set up measurement points on the stator surface, guide surface and sliding surface respectively, and fix the calibrated track measurement frame to the reference surface of the high-speed maglev track to be tested by magnetic adsorption. Step 4: After the pointers of the electronic dial indicators stabilize, read the measurement values ​​of the four electronic dial indicators simultaneously and record them as a, b, c, and d respectively. Step 5: Based on the collected values, calculate the track smoothness index NGK and the track offset index OFFSET using the formula. Step 6: Compare the calculated track smoothness index NGK and track offset index OFFSET with the accuracy standard values ​​of each functional surface of the high-speed maglev track to determine whether the local accuracy of the track meets the standard and to evaluate the effectiveness of the beam adjustment work.

[0012] Furthermore, it also includes the following steps: Step 7: After the measurement is completed, clean the dust and oil stains on the surface of the track measuring table base and the standard sample, apply anti-rust oil to its positioning surface and reference surface to form a protective layer, and store the track measuring table base and the standard sample in a suitable location.

[0013] Further, in step 5, the track smoothness index NGK and the track offset index OFFSET are calculated using formulas. The formula for calculating the track smoothness index NGK is as follows: NGK = 1.25 × |b - a + cd|; The formula for calculating the track offset index OFFSET is: OFFSET=(ad)+1.25×(ba-c+d).

[0014] Furthermore, in step 4, the specific operations of simultaneously reading the measurement values ​​of the four electronic dial gauges (3) and recording them as a, b, c, and d respectively include: Obtain the set of transient reading sequences output by the four electronic dial gauges (3) within a preset continuous sampling period, and at the same time obtain the absolute temperature fluctuation parameters of the environment around the high-speed maglev track under test within the preset continuous sampling period. Based on the transient reading sequence set corresponding to each of the four electronic percentage meters (3), the initial time reading, the end time reading, and the middle time reading corresponding to each of the electronic percentage meters (3) are extracted; and based on the transient reading sequence set corresponding to each of the four electronic percentage meters (3), the reading fluctuation variance parameter of each of the electronic percentage meters (3) in the preset continuous sampling period is calculated. Finally, based on the extracted initial time reading, the final time reading, the midpoint time reading, the calculated reading fluctuation variance parameter, the obtained absolute temperature fluctuation parameter, and the preset micro-deformation nonlinear limit approximation formula, the absolute steady-state measurement compensation true values ​​of the four electronic dial gauges (3) are calculated respectively; wherein, the micro-deformation nonlinear limit approximation formula used is as follows: in, The calculated true value of the absolute steady-state measurement compensation corresponding to the electronic dial gauge (3); This represents the extracted reading at the initial time. This represents the extracted end-time reading; This represents the extracted reading at the center time. The high-frequency vibration attenuation suppression constant represents the high-frequency vibration that has been pre-calibrated for the metal substrate of the track measuring table (1); The calculated variance parameter representing the reading fluctuation; This represents the standard deviation obtained by performing a square root operation on the variance parameter of the reading fluctuation; Represents the logarithmic function with the natural constant as its base; This represents the obtained absolute temperature fluctuation parameter; This represents the preset temperature sensitivity normalization coefficient; This refers to a positive offset constant that is pre-set to prevent the logarithmic function from having zero or negative values, and the positive offset constant is limited to being greater than 0. The calculated true values ​​of each absolute steady-state measurement compensation are assigned to parameters a, b, c, and d, thereby triggering the execution of the subsequent step 5.

[0015] Furthermore, in step 6, after determining whether the local accuracy of the track meets the standard, an intelligent collaborative guidance step for decoupling interference from multi-functional surface deformation is executed. This intelligent collaborative guidance step includes: Obtain the track smoothness index NGK and the track offset index OFFSET corresponding to the stator surface, the guide surface and the sliding surface of the high-speed maglev track under test at the same mileage position; When it is determined that any single index inside the stator surface, the guide surface, or the sliding surface at the same mileage position fails to meet the accuracy standard value, the stiffness transfer model pre-established for the high-speed maglev track under test is retrieved. Based on the stiffness transfer model, the track smoothness index NGK and the track offset index OFFSET corresponding to the stator surface, the track smoothness index NGK and the track offset index OFFSET corresponding to the guide surface, and the track smoothness index NGK and the track offset index OFFSET corresponding to the sliding surface, a three-dimensional spatial deformation linkage interference matrix covering the stator surface, the guide surface, and the sliding surface is constructed. Based on the constructed three-dimensional spatial deformation linkage interference matrix, the displacement vector that causes secondary deviations in the associated surfaces when an independent correction action is performed on a specific surface that has not reached the accuracy standard value is calculated. Finally, based on the calculated displacement vector, a multi-round collaborative approximation adjustment strategy to achieve global accuracy is calculated using a preset multi-objective optimization algorithm. Guidance instructions containing the beam adjustment sequence and the adjustment displacement amount of each round are sent to the external field maintenance terminal to prevent the phenomenon of linkage deterioration of related functional surfaces exceeding the accuracy standard value caused by isolated adjustment of local surfaces during maintenance operations.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the track measurement frame is quickly fixed and disassembled using a magnetic base, eliminating the need for complex on-site calibration and allowing for operation by a single person. Furthermore, the track measurement frame employs a composite structure of high-strength alloy hard aluminum profile and tool steel, balancing high rigidity and lightweight design. This prevents frame deformation from affecting measurement accuracy and facilitates on-site handling and operation. Standard samples are used to achieve pre-measurement calibration and benchmark unification, ensuring the consistency, repeatability, and traceability of measurement results. This accurately reflects changes in indicators before and after track adjustments, providing reliable data support for track fine-tuning and maintenance assessment. Simultaneously, a comprehensive maintenance method is provided to effectively guarantee the tool's accuracy retention and service life, reducing long-term operating costs.

[0017] 2. In this invention, by using four electronic dial indicators to simultaneously collect data and combining them with a dedicated formula to quickly calculate indicators, the measurement efficiency is greatly improved, making it suitable for rapid on-site testing and daily inspections. Simultaneously, the dial indicator accuracy of the track measuring stand reaches 0.01mm, allowing the accuracy of the reference surface between the standard sample and the track measuring stand to be controlled within 0.04mm, achieving sub-millimeter-level measurement and accurately capturing minute deviations in the track, meeting the accuracy requirements of high-speed maglev tracks. Furthermore, it does not rely on environmental conditions such as visibility and lighting, overcoming the environmental limitations of optical instrument measurements, and can be used in complex working conditions such as track unit connections, high-frequency vibration sections, and easily worn areas. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the measuring instrument frame of the present invention; Figure 2 This is a structural diagram of the measuring instrument frame of the present invention; Figure 3 This is a diagram of the measurement reference frame of the present invention; Figure 4 This is a diagram of the measurement reference frame of the present invention.

[0019] In the diagram: 1. Track measuring instrument stand; 2. Magnetic instrument base; 21. Magnetic button; 3. Electronic dial indicator; 4. Standard sample; 5. Aluminum angle ruler base. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To address the technical challenges of relying primarily on imported high-precision total stations for surveying, which are costly and complex to operate, and lacking dedicated static surveying tools suitable for rapid on-site inspections and environmental adaptability, thus failing to meet the real-time data requirements for routine track inspections and fine-tuning, please refer to [link to relevant documentation]. Figures 1-4 This embodiment provides the following technical solution: A dedicated measuring frame for high-speed maglev tracks includes: a track measuring frame 1, which is 2100mm long and has an overall torsional deformation not exceeding 2.00mm. Two magnetic bases 2 are symmetrically arranged at both ends of the track measuring frame 1, each equipped with a magnetic button 21. The reference surfaces of the two magnetic bases 2 are on the same plane, with a flatness error not exceeding 0.04mm and an error range of ±0.02mm, ensuring the uniformity of the measurement reference. Four electronic dial indicators 3 with an accuracy of 0.01mm are mounted on the base of the track measuring frame 1. These electronic dial indicators 3 are used to simultaneously measure error data at four points on the track measuring frame 1, ensuring accurate acquisition of error data at each point. The magnetic bases 2 and the electronic dial indicators... All three components are products of the Harbin Measuring Instrument Group (HMEG) brand. The electronic dial indicator 3 can adjust the pointer compression range by approximately 0.5 mm. The track measuring instrument frame 1 is also equipped with a standard sample 4, which is 2100 mm in length and is compatible with the base of the track measuring instrument frame 1. The standard sample 4 has two positioning reference surfaces and four dial indicator reference surfaces. The positioning reference surface of the standard sample 4 matches the base surface of the magnetic base 2 on the track measuring instrument frame 1, and the dial indicator reference surface of the standard sample 4 corresponds to the position of the probe of the electronic dial indicator 3 on the track measuring instrument frame 1. The parallelism and flatness error between each reference surface is ≤0.04 mm, providing a unified reference for the calibration of the instrument frame. To ensure the stability of the track measuring instrument frame 1, two aluminum angle rulers 5 are symmetrically arranged in the middle of its base.

[0022] The beneficial effects achieved by the above are as follows: the magnetic base 2 enables rapid fixing and disassembly of the track measurement frame 1, eliminating the need for complex on-site calibration, and allowing for operation by a single person; the track measurement frame 1 adopts a composite structure of high-strength alloy hard aluminum profile and tool steel, balancing high rigidity and lightweight, preventing frame deformation from affecting measurement accuracy, and facilitating on-site handling and operation; the standard sample 4 enables pre-measurement calibration and benchmark unification, ensuring the consistency, repeatability, and traceability of measurement results, accurately reflecting changes in indicators before and after track adjustment, and providing reliable data support for track fine-tuning and operation and maintenance evaluation; at the same time, a complete maintenance method is provided, effectively ensuring the accuracy retention and service life of the tool, reducing long-term operating costs.

[0023] The indicator reading and marking module is configured to read the measured values ​​of four electronic dial gauges after they have stabilized during high-speed maglev track measurement, and mark them sequentially.

[0024] The index calculation and judgment module is configured to calculate the track smoothness index NGK and the track offset index OFFSET based on the measured data of the electronic percentage gauge 3. It then compares the results with the accuracy standard values ​​for different track functional surfaces to determine whether the local track accuracy meets the standards and evaluate the effectiveness of the beam adjustment work. Its judgment rules are as follows: If the measured track smoothness index NGK value is less than or equal to the standard limit, and the measured track offset index OFFSET value is less than or equal to the standard limit, then the track local accuracy is deemed to meet the standard and the beam adjustment work is effective. If the measured track smoothness index NGK value is greater than the standard limit, or the measured track offset index OFFSET value is greater than the standard limit, it is determined that the track local accuracy is substandard, and the items exceeding the standard must be clearly marked. For example, if the measured track smoothness index NGK is 3.25mm, exceeding the standard value by 3.0mm; and the measured track offset index OFFSET is 1.9mm, exceeding the standard value by 1.0mm, then the beam adjustment work is deemed substandard, and the track beam needs to be readjusted.

[0025] The result output module is configured to output judgment result information based on the judgment result, which includes: track functional surface type (e.g., stator surface / guide surface / sliding surface), measured track smoothness index NGK value, NGK standard limit, measured track offset index OFFSET value, OFFSET standard limit, accuracy compliance status (e.g., compliant / non-compliant), and beam adjustment work effect evaluation conclusion.

[0026] The beneficial effects achieved by the above are as follows: By using four electronic dial gauges 3 to collect data simultaneously and combining them with a dedicated formula to quickly calculate indicators, the measurement efficiency is greatly improved, making it suitable for rapid on-site testing and daily inspections; at the same time, the dial gauge accuracy of the track measuring stand 1 reaches 0.01mm, which can control the accuracy of the reference surface of the standard sample 4 and the track measuring stand 1 within 0.04mm, achieving sub-millimeter level measurement, accurately capturing the tiny deviations of the track, and meeting the accuracy requirements of high-speed maglev tracks; and it does not rely on environmental conditions such as line of sight and lighting, overcoming the environmental limitations of optical instrument measurement, and can be used in complex working conditions such as track unit joints, high-frequency vibration sections, and easily worn areas.

[0027] The measurement method for a dedicated measuring stand for high-speed maglev tracks includes the following steps: Step 1: Attach the base surfaces of the magnetic bases 2 at both ends of the track measuring table frame 1 to the positioning reference surface of the standard sample 4, and press the magnetic button 21 to make the track measuring table frame 1 and the standard sample 4 adsorb and fix them. Step 2: Adjust each of the four electronic dial indicators 3 to the 0 position, controlling the pointer compression of the electronic dial indicator 3 to about 0.5mm, to ensure that the pointer can flexibly respond to changes in error; Step 3: After the track measurement frame 1 has completed the 0-position calibration, set up measuring points on the stator surface, guide surface, and sliding surface respectively. The spacing between measuring points on the stator surface is 690mm and 862.5mm, and the spacing between measuring points on the guide surface and sliding surface is 800mm and 900mm. Fix the calibrated track measurement frame 1 to the reference surface of the high-speed maglev track to be tested by magnetic base 2, ensuring that the track measurement frame 1 is firmly installed and the reference surface is tightly attached without loosening or offset. Step 4: After the pointer of electronic dial indicator 3 stabilizes, read the measurement values ​​of the four electronic dial indicators 3 simultaneously and record them as a, b, c, and d respectively. Step 5: Based on the collected values, calculate the track smoothness index NGK and the track offset index OFFSET using formulas; the formula for calculating the track smoothness index NGK is as follows: NGK = 1.25 × |b - a + cd|; The formula for calculating the track offset index OFFSET is: OFFSET=(ad)+1.25×(ba-c+d).

[0028] Step 6: Compare the calculated track smoothness index NGK and track offset index OFFSET values ​​with the accuracy standard values ​​of each functional surface of the high-speed maglev track to determine whether the local accuracy of the track meets the standard and to evaluate the effectiveness of the beam adjustment work. Step 7: Since both the standard sample 4 and the track measuring table stand 1 are precision measuring tools, they need to be stored in a dedicated room with stable room temperature, clean and dry conditions to avoid drastic temperature and humidity fluctuations and prevent environmental factors from causing component deformation, corrosion, or accuracy degradation. After measurement, wipe the dust and oil off the base of the track measuring table stand 1 and the surface of the standard sample 4, and apply anti-rust oil to their positioning and reference surfaces to form a protective layer, effectively preventing the components from rusting. Then, store the track measuring table stand 1 and the standard sample 4 in a suitable location. When storing, the standard sample 4 and the track measuring table stand 1 should be placed on a flat dedicated shelf or marble slab to avoid stacking, squeezing, or collision, which could damage the positioning and reference surfaces and ensure that the geometric accuracy of the tools is not affected. Regularly check the sensitivity of the electronic dial indicator 3, the adsorption force of the magnetic base 2, and the flatness of the reference surface of the track measuring table stand 1 to ensure that if any abnormalities are found, calibration or repair can be performed in a timely manner.

[0029] In one embodiment, a high-speed maglev test line in a certain region is taken as the research object. This test line, established in 2005, is one of the few test platforms with the capability to test core technologies of high-speed maglev, providing an important practical carrier for the research and development and engineering verification of high-speed maglev technology. During the test, the track smoothness deteriorated due to issues such as the interaction between the train and the track and the influence of the surrounding environment. To restore track smoothness, it is necessary to make minor adjustments to the beams (Y and Z directions) to improve track smoothness. The designed dedicated contact-type track measurement frame 1 can be used to measure the NGK and OFFSET indices between the beams before and after the track beam adjustment, thereby evaluating the effectiveness of the beam adjustment work.

[0030] This test selected the SYL16~SYL17 beam section of the test line as the target object. Measurement points were set for the three functional surfaces of the track, and the standard for the spacing between the measurement points was defined. The dial gauge readings (denoted as a, b, c, d) of four points on the left (L) and right (R) sides of each functional surface were collected simultaneously using a dedicated measuring table. Data collection was completed twice, before and after track adjustment. The NGK and OFFSET index values ​​were then calculated based on two formulas. The specific measurement data are shown in Table 1 and Table 2.

[0031] Table 1 Manual Inspection Table for Track Beams “OFFSET” and “NGK” Table 2 Adjusted Measurement Values ​​of “NGK” and “OFFSET” The beneficial effects achieved by the above are as follows: The data comparison results show that the dedicated track measurement stand 1 can accurately capture the changes in NGK and OFFSET indicators before and after track adjustment, fully verifying the accuracy and reliability of the measurement method. Simultaneously, the track measurement stand 1 is easy to operate and efficient in data acquisition, quickly completing the comparison of indicators before and after adjustment. This provides real-time and accurate data support for beam adjustment operations, further demonstrating the engineering value of this measurement technology in the fine adjustment and condition assessment of high-speed maglev tracks.

[0032] Working principle: Using the standard sample 4 that is compatible with the track measuring instrument frame 1 as a reference, the track measuring instrument frame 1 and the magnetic base 2 are fixed together with their positioning reference surfaces. The four electronic dial indicators 3 are zeroed and the pointer compression is controlled at about 0.5mm to complete the calibration. Then, according to different measuring point spacing, the calibrated track measuring instrument frame 1 is attached to the reference surfaces of each functional surface of the track to be tested through the magnetic base 2. After the electronic dial indicators 3 stabilize, the readings are taken and the four measured values ​​a, b, c, and d are marked. The NGK and OFFSET indices are calculated by substituting them into the special formula. The index values ​​are compared with the accuracy standard values ​​of each functional surface to determine whether the track accuracy meets the standard and to evaluate the beam adjustment effect.

[0033] In one embodiment, the specific operation of synchronously reading the measurement values ​​of the four electronic dial gauges (3) and recording them as a, b, c, and d in step 4 includes: Obtain the set of transient reading sequences output by the four electronic dial gauges (3) within a preset continuous sampling period, and at the same time obtain the absolute temperature fluctuation parameters of the environment around the high-speed maglev track under test within the preset continuous sampling period. Based on the transient reading sequence set corresponding to each of the four electronic percentage meters (3), the initial time reading, the end time reading, and the middle time reading corresponding to each of the electronic percentage meters (3) are extracted; and based on the transient reading sequence set corresponding to each of the four electronic percentage meters (3), the reading fluctuation variance parameter of each of the electronic percentage meters (3) in the preset continuous sampling period is calculated. Finally, based on the extracted initial time reading, the final time reading, the midpoint time reading, the calculated reading fluctuation variance parameter, the obtained absolute temperature fluctuation parameter, and the preset micro-deformation nonlinear limit approximation formula, the absolute steady-state measurement compensation true values ​​of the four electronic dial gauges (3) are calculated respectively; wherein, the micro-deformation nonlinear limit approximation formula used is as follows: in, The calculated true value of the absolute steady-state measurement compensation corresponding to the electronic dial gauge (3); This represents the extracted reading at the initial time. This represents the extracted end-time reading; This represents the extracted reading at the center time. The high-frequency vibration attenuation suppression constant represents the high-frequency vibration that has been pre-calibrated for the metal substrate of the track measuring table (1); The calculated variance parameter representing the reading fluctuation; This represents the standard deviation obtained by performing a square root operation on the variance parameter of the reading fluctuation; Represents the logarithmic function with the natural constant as its base; This represents the obtained absolute temperature fluctuation parameter; This represents the preset temperature sensitivity normalization coefficient; This refers to a positive offset constant that is pre-set to prevent the logarithmic function from having zero or negative values, and the positive offset constant is limited to being greater than 0. The calculated true values ​​of each absolute steady-state measurement compensation are assigned to parameters a, b, c, and d, thereby triggering the execution of the subsequent step 5.

[0034] The working principle and beneficial effects of the above technical solution are as follows: In this embodiment, for the operation step of simultaneously reading the measurement values ​​of four electronic dial gauges 3 in the aforementioned technical solution, in order to compensate for the measurement error caused by dynamic physical variables under the high-speed maglev track ranging condition, a micro-dynamic stress relief prediction and high-frequency vibration adaptive compensation logic is configured.

[0035] It is understandable that after the track measurement frame 1, made of a composite structure of alloy hard aluminum profile and tool steel, is attached to the metal reference surface of the high-speed maglev track to be measured via a magnetic base 2, mechanical residual stress is generated inside the metal matrix. Over time, this mechanical residual stress is released non-linearly within the matrix, causing microscopic creep in the metal structure of the track measurement frame 1. If a static reading method is used to extract values ​​at a single specific moment, displacement drift deviation caused by dynamic stress release will be introduced. Furthermore, the wind load in the environment of the high-speed maglev track, the intrinsic vibration of the structural support components, and the thermodynamic dimensional deformation of the alloy material caused by environmental temperature fluctuations—all these physical variables change over time and are superimposed on the residual stress release process, causing dynamic fluctuations in the sensor output signal. Based on the above mechanical and thermodynamic physical states, this embodiment uses continuous transient data sampling and a non-linear approximation algorithm to process the output data.

[0036] Specifically, in step 4, the operation steps of simultaneously reading the measurement values ​​of the four electronic dial gauges 3 and recording them as parameters a, b, c, and d respectively include: Acquire the set of transient reading sequences output by four electronic dial gauges 3 within a preset continuous sampling period, and simultaneously acquire the ambient temperature fluctuation parameters of the environment surrounding the high-speed maglev track under test within the preset continuous sampling period. ; Based on the transient reading sequences of the four electronic dial gauges 3, the initial readings of each electronic dial gauge 3 are extracted. End point reading and the reading at the center time Furthermore, based on the transient reading sequences corresponding to each of the four electronic dial gauges 3, the variance parameter of the reading fluctuation of each electronic dial gauge 3 within a preset continuous sampling period is calculated. Furthermore, based on the extracted initial time readings... End point reading Reading at center time Calculated reading fluctuation variance parameter 1. Obtained ambient temperature fluctuation parameters Based on the preset micro-deformation nonlinear limit approximation formula, the steady-state measurement compensation true values ​​of the corresponding four electronic dial gauges were calculated. And calculate the true values ​​of each steady-state measurement compensation. The corresponding values ​​are assigned to parameters a, b, c, and d, which then triggers the execution of the subsequent step 5.

[0037] Furthermore, regarding the acquisition of transient reading sequences and ambient temperature fluctuation parameters... The execution details are as follows: the control unit is configured with a synchronous trigger control program. During a specific execution process, the control unit synchronously sends acquisition enable commands to the data acquisition terminals of the four electronic dial gauges 3. The preset continuous sampling period is configured as a time window containing a specific number of discrete sampling points at equal time intervals. Within the time window, the analog-to-digital conversion unit of the electronic dial gauge 3 continuously acquires the analog displacement of the measuring rod at a set fixed sampling frequency and converts it into a digital sequence, forming a corresponding transient reading sequence set. The synchronous operation involves the temperature sensor arranged on the leeward side surface of the track measuring instrument frame 1 continuously acquiring temperature data within the preset continuous sampling period. The control unit reads the temperature value array output by the temperature sensor, extracts the maximum and minimum temperature acquisition values ​​from the temperature value array, and calculates the difference between the maximum and minimum temperature acquisition values ​​to obtain the ambient temperature fluctuation parameter. The ambient temperature fluctuation parameters were obtained using the dynamic range algorithm. This is used to characterize the range of thermodynamic gradient disturbances experienced by the track measurement frame 1 within a specific acquisition period. The temperature sensor is positioned on the leeward side surface to reduce direct physical interference from environmental heat convection or human radiation on the temperature measuring element, thus minimizing the fluctuation of the measured environmental temperature parameters. It objectively reflects the range of thermodynamic parameter changes in the boundary conditions of the metal composite matrix.

[0038] Furthermore, the data processing logic and parameter extraction method for the transient reading sequence set are explained below: The control unit extracts the value corresponding to the first sampling point within the time window as the initial time reading. Extract the value corresponding to the last sampling point within the time window as the end time reading. The value corresponding to the sampling point at the midpoint of the time span of the time window is extracted as the reading of the midpoint time. Initial reading Displacement data state at the starting point of residual stress release in the structure, and reading at the ending point. The displacement data state, which tends to level off at the end of the stress release observation window, is represented by the reading at the middle time. This characterizes the data state of the nonlinear displacement decay curve at the midpoint of time. Furthermore, the control unit extracts all discrete data points from the transient reading sequence set, performs statistical variance calculations, and generates a reading fluctuation variance parameter. Reading fluctuation variance parameter The value is proportional to the dispersion of the rod displacement data within the sampling period, and is used to quantify the frequency domain fluctuation of displacement caused by wind load and structural vibration on the sensor's mechanical components.

[0039] The definitions and dimensional specifications of the parameters contained in the above formula are as follows: Steady-state measurement compensation true value This represents the displacement reference data output by the corresponding electronic dial gauge 3 after algorithm processing, with the dimension set to millimeters; the initial reading. This represents the data corresponding to the start node of the timeline, with the unit set to millimeters; the reading at the end time. This represents the data corresponding to the last node on the timeline of the sequence, with the unit set to millimeters; the reading at the center time point. This represents the data corresponding to the midpoint node of the sequence time axis, with the dimension set to millimeters; high-frequency vibration attenuation suppression constant. This represents the system constants, which are dimensionless parameters, calibrated in advance through bench tests based on the structural dynamic characteristics of track measurement frame 1; the reading fluctuation variance parameter. The statistical variance data representing the discrete displacement sequence, with the dimension set to square millimeters; the standard deviation value. Indicates the variance parameter of reading fluctuation The data obtained by performing a square root mathematical operation is measured in millimeters. Represents a logarithmic mathematical function with the natural constant as its base; ambient temperature fluctuation parameter. This represents the range of temperature changes within the data acquisition period, with the dimension set to degrees Celsius; the temperature sensitivity normalization coefficient. This represents the preset proportionality coefficient for thermo-mechanical coupling transformation, with the dimension set to the reciprocal of Celsius; positive offset constant. This represents a pre-defined dimensionless bias parameter, and its numerical constraint is a positive offset constant. .

[0040] It is understandable that the primary polynomial on the right-hand side of the nonlinear limit approximation formula for microscopic deformation constitutes the nonlinear convergence reference fraction. The numerator of this nonlinear convergence reference fraction is determined by the initial time reading. Readings at the end time The product of the two values, minus the reading at the midpoint. The square of the fraction is used to construct the nonlinear convergent reference fraction; the denominator of the fraction is derived from the initial time reading. Add the end time reading Subtract twice the center time reading. The mathematical derivation of the aforementioned nonlinear convergence benchmark fraction is based on the assumption that the displacement variation caused by the release of mechanical residual stress follows an exponential decay evolution law. Mathematical extrapolation is performed using three sampling points with equidistant time distributions to calculate the asymptotic constant value under the condition that the time variable tends to infinity. In the algebraic dimensional calculation process, the numerator's result has a dimension of square millimeters, and the denominator's result has a dimension of millimeters. After performing a division operation, the resulting nonlinear convergence benchmark fraction maintains a dimension of millimeters.

[0041] Furthermore, the minor polynomial after the minus sign on the right side of the equation constitutes the environmental deviation compensation term. Specific parameter: high-frequency vibration attenuation suppression constant. Obtained through pre-executed shaking table calibration tests, this data is used to characterize the vibration absorption and damping characteristics of a specific composite structure. The true value, consisting of a logarithmic function, includes temperature-sensitive normalization coefficients. With ambient temperature fluctuation parameters The product of the products, the aforementioned product and the positive offset constant Add together. Temperature-sensitive normalized coefficient. The dimensions (reciprocal of Celsius) and the parameters of ambient temperature fluctuation. Multiplying the quantities by their dimensions (in degrees Celsius) achieves dimension normalization. The resulting dimensionless product is then multiplied by the dimensionless positive offset constant. Perform addition calculations to satisfy the variable substitution requirements of the logarithmic domain. The environmental deviation compensation term will include the standard deviation value. The output value of the natural logarithmic function reflecting the thermal hysteresis effect, and the high-frequency vibration damping suppression constant. Perform a series of multiplications, ensuring the result retains its dimension in millimeters. The computation module extracts the constant value from the nonlinear convergence benchmark fraction, subtracts the value calculated from the environmental deviation compensation term, and outputs the final steady-state measurement compensation true value. .

[0042] To demonstrate the data flow process of microscopic dynamic stress relief prediction and high-frequency vibration adaptive compensation logic under specific parameter conditions, a data calculation example is introduced: After the track measurement table 1 enters the test state, the temperature sensor acquires the ambient temperature fluctuation parameters. The value is 4.5 degrees Celsius. The data processing module extracts various node parameters from the transient reading sequence set: initial reading. The value is 3.15 mm, centered time reading. The value is 2.85 mm, and the reading at the end time is... The value is 2.68 mm. The variance parameter of the reading fluctuation was obtained through statistical calculation. The value is 0.0256 square millimeters. The microprocessor calls the formula to execute the nonlinear convergence benchmark fraction calculation: the numerator parameter is calculated as 3.15 multiplied by 2.68 minus the square of 2.85, and the denominator parameter is calculated as 3.15 plus 2.68 minus twice 2.85, resulting in a quotient of 2.457 millimeters. Subsequently, the microprocessor executes the environmental deviation compensation term calculation: calling the high-frequency vibration attenuation suppression constant. The value is 1.2 for the reading fluctuation variance parameter. Execute the square root command to obtain the standard deviation value. The value is 0.16 mm. Let the temperature sensitivity normalization coefficient be... The value is 0.8, the positive offset constant. The value is 1.0. Calculate the temperature sensitivity normalization coefficient. (0.8) and ambient temperature fluctuation parameters The product of (4.5) and the positive offset constant (1.0) Adding these together yields the true value 4.6. The command is then invoked to calculate the natural logarithm of this true value. The high-frequency vibration attenuation suppression constant is then... (1.2) Standard deviation value Multiplying (0.16) by the aforementioned natural logarithmic value yields an environmental deviation compensation term of 0.293 mm. Finally, by subtracting the environmental deviation compensation term value of 0.293 mm from the baseline fractional quotient of 2.457 mm, the microprocessor outputs the true steady-state measurement compensation value. The value is 2.164 mm.

[0043] In one embodiment, after determining whether the local accuracy of the track meets the standard in step 6, an intelligent collaborative guidance step for decoupling interference from multi-functional surface deformation is further executed. This intelligent collaborative guidance step includes: Obtain the track smoothness index NGK and the track offset index OFFSET corresponding to the stator surface, the guide surface and the sliding surface of the high-speed maglev track under test at the same mileage position; When it is determined that any single index inside the stator surface, the guide surface, or the sliding surface at the same mileage position fails to meet the accuracy standard value, the stiffness transfer model pre-established for the high-speed maglev track under test is retrieved. Based on the stiffness transfer model, the track smoothness index NGK and the track offset index OFFSET corresponding to the stator surface, the track smoothness index NGK and the track offset index OFFSET corresponding to the guide surface, and the track smoothness index NGK and the track offset index OFFSET corresponding to the sliding surface, a three-dimensional spatial deformation linkage interference matrix covering the stator surface, the guide surface, and the sliding surface is constructed. Based on the constructed three-dimensional spatial deformation linkage interference matrix, the displacement vector that causes secondary deviations in the associated surfaces when an independent correction action is performed on a specific surface that has not reached the accuracy standard value is calculated. Finally, based on the calculated displacement vector, a multi-round collaborative approximation adjustment strategy to achieve global accuracy is calculated using a preset multi-objective optimization algorithm. Guidance instructions containing the beam adjustment sequence and the adjustment displacement amount of each round are sent to the external field maintenance terminal to prevent the phenomenon of linkage deterioration of related functional surfaces exceeding the accuracy standard value caused by isolated adjustment of local surfaces during maintenance operations.

[0044] The working principle and beneficial effects of the above technical solution are as follows: Furthermore, after determining whether the local accuracy of the track meets the standard in step 6, the control system performs an additional intelligent collaborative guidance step for decoupling interference from multi-functional surface deformation.

[0045] It is understandable that the stator surface, guide surface, and sliding surface in a high-speed maglev track system are rigidly connected to the same prestressed composite beam structure via reinforced concrete. During local mechanical adjustment operations, normal or tangential adjustment forces are applied to specific functional surfaces. These forces create a non-uniformly distributed stress transmission network within the beam, causing corresponding structural strain and displacement changes in associated functional surfaces located at the same cross-section. Based on the aforementioned rigid linkage interference effect, this embodiment employs a multi-functional surface deformation interference decoupling model and a multi-objective optimization algorithm to generate coordinated adjustment command parameters.

[0046] Specifically, the parameter processing sequence for the intelligent collaborative guidance steps includes: Obtain the track smoothness index NGK and track offset index OFFSET corresponding to the stator surface, guide surface and sliding surface of the high-speed maglev track under test at the same mileage position; When the calculation module determines that there is a single indicator inside the stator surface, guide surface or sliding surface at the same mileage position that fails to be within the preset accuracy standard value range, it retrieves the stiffness transfer model that was pre-established for the specific type of beam of the high-speed maglev track to be tested from the storage unit. Based on the stiffness transfer model, the track smoothness index NGK and track offset index OFFSET corresponding to the stator surface, the track smoothness index NGK and track offset index OFFSET corresponding to the guide surface, and the track smoothness index NGK and track offset index OFFSET corresponding to the sliding surface, a three-dimensional spatial deformation linkage interference matrix covering the stator surface, guide surface and sliding surface is constructed. Based on the constructed three-dimensional spatial deformation linkage interference matrix, the drag displacement vector that causes secondary displacement deviation of the associated surface when an independent correction thrust action is performed on a specific surface that has not reached the accuracy standard value is calculated. Finally, based on the calculated displacement vector, the system calls a multi-objective optimization algorithm to solve a multi-round collaborative approximation adjustment strategy that prompts the global accuracy parameters to return to the accuracy standard value. The system then sends guidance instructions containing the beam adjustment sequence and the adjustment displacement parameters for each round to the external field maintenance terminal through the communication module. This is used to limit the phenomenon of related functional surface indicators exceeding the limit due to independent adjustment of individual local surfaces.

[0047] Furthermore, the structural characteristics of the stiffness transfer model and the three-dimensional spatial deformation linkage interference matrix are explained below: The stiffness transfer model is generated based on the three-dimensional finite element mesh node model of the track beam and the material elastic constitutive equation. It is used to characterize the numerical relationship between mechanical force and displacement response between various surface nodes of the beam structure. The control unit reads the track smoothness index NGK and track offset index OFFSET of the stator surface, guide surface, and sliding surface, and maps the geometric error values ​​of the current test section into the stiffness transfer model to construct a three-dimensional spatial deformation linkage interference matrix for a symmetrical positive definite structure. The main diagonal submatrix elements in the three-dimensional spatial deformation linkage interference matrix are used to describe the normal elastic stiffness parameters of the corresponding functional surface resisting the normal thrust in the local coordinate system. The off-diagonal submatrix elements in the three-dimensional spatial deformation linkage interference matrix are assigned values ​​based on the attenuation model of displacement strain transmission inside the composite beam, characterizing the cross-interference coupling response weights caused by the force crossing the boundaries of different functional surfaces. When a thrust vector is applied to a specific surface, the control unit performs a matrix multiplication operation between the three-dimensional spatial deformation linkage interference matrix and the aforementioned thrust vector to obtain the displacement response component set corresponding to the non-force-associated functional surface, and defines the displacement response component set as the entrained displacement vector.

[0048] Furthermore, the logical architecture of the multi-objective optimization algorithm is defined as a multivariate constraint nonlinear programming operation process. The operational model sets the state variables as a set of three-dimensional mechanical adjustment displacement vectors to be applied to the stator surface, guide surface, and sliding surface. The objective function is set as the sum of the root mean square functions of the differences between the smoothness index and offset index of each of the stator surface, guide surface, and sliding surface relative to the upper and lower limits of the accuracy standard value after calculation. The microprocessor uses minimizing the objective function as the iterative objective and takes the total mechanical adjustment displacement as a hard threshold constraint, performing optimization iterations via numerical gradient descent. After the iteration meets the convergence threshold condition, the microprocessor extracts the current set of three-dimensional mechanical adjustment displacement vectors as the optimal solution sequence. The system instruction conversion module divides the optimal solution sequence into multiple batches of discrete beam adjustment execution sequences and single adjustment displacement parameters according to timing rules, and encapsulates and outputs guidance instructions.

[0049] Example of operational data flow for introducing multi-functional surface deformation interference decoupling steps: The external system obtains the measurement parameters of the current cross-section position, and the input data shows that the track smoothness index NGK corresponding to the stator surface and the track smoothness index NGK corresponding to the sliding surface are both within the corresponding accuracy standard value limits; the track smoothness index NGK test value corresponding to the guide surface is 4.8 mm, which is greater than the preset accuracy standard value upper limit of 3.0 mm.

[0050] The control unit assembles a three-dimensional spatial deformation linkage interference matrix based on the stiffness transfer model and the above input data and performs forward matrix operation: if a force is applied to the guide surface to produce a reverse correction displacement of 1.8 mm, the calculated output displacement vector data indicates that the stress transmitted by this correction action inside the beam will cause the displacement parameters of the stator surface to deviate and exceed the corresponding accuracy standard value limit.

[0051] The control unit executes a multi-objective optimization algorithm to perform numerical iterations. After reaching the convergence condition, it outputs a multi-round collaborative approximation adjustment strategy and sends guidance instructions containing the following parameters to the field maintenance terminal: The first round instruction specifies applying a tensile force at the outer mechanical support node of the sliding surface, with the input controlled to produce a pre-tightened state with an elastic deformation of 0.4 mm; the second round instruction specifies inputting a predetermined release torque parameter at the anchor bolt node of the stator base to perform a loosening operation, reducing the structural torsional stiffness constraint force set at this location; the final round instruction specifies performing a three-batch advancing action on the guide surface, with the single advancing displacement parameter set to 0.6 mm. After the receiving terminal executes the corresponding mechanical action, the NGK measurement value of the track smoothness index corresponding to the guide surface falls back to the standard range; simultaneously, due to the pre-tightened state of the sliding surface deformation and the release operation of the stator surface constraint force, the entanglement displacement transmission amount given by the matrix operation is absorbed, so that the index parameters of the stator surface and the sliding surface remain within the set accuracy standard value range.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or high-voltage switchgear that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or high-voltage switchgear.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special measuring instrument stand for high-speed maglev tracks, including: The track measuring table frame (1) is characterized in that two magnetic bases (2) are symmetrically arranged at both ends of the track measuring table frame (1), and four electronic dial gauges (3) are installed on the base of the track measuring table frame (1). The electronic dial gauges (3) are used to simultaneously measure the error data at four points of the track measuring table frame (1). A standard sample (4) is also provided on the track measuring table frame (1), and the standard sample (4) is adapted to the base of the track measuring table frame (1).

2. The high-speed maglev track-specific measuring stand according to claim 1, characterized in that, Also includes: The indicator reading and marking module is configured to read the measured values ​​of four electronic dial gauges (3) after they have stabilized during the high-speed maglev track measurement, and mark them in sequence. The index calculation and judgment module is configured to calculate the track smoothness index NGK and the track offset index OFFSET based on the measured data of the electronic percentage table (3), and judge whether the local accuracy of the track meets the standard by comparing the accuracy standard values ​​of different track functional surfaces, and evaluate the effect of the beam adjustment work. The result output module is configured to output judgment result information based on the judgment result, which includes: track functional surface type, measured track smoothness index NGK value, NGK standard limit, measured track offset index OFFSET value, OFFSET standard limit, accuracy compliance status, and beam adjustment work effect evaluation conclusion.

3. The high-speed maglev track-specific measuring stand according to claim 1, characterized in that, The evaluation rules for determining whether the local accuracy of the track meets the standard in the index calculation and judgment module are as follows: If the measured track smoothness index NGK value is less than or equal to the standard limit, and the measured track offset index OFFSET value is less than or equal to the standard limit, then the track local accuracy is deemed to meet the standard and the beam adjustment work is effective. If the measured track smoothness index NGK value is greater than the standard limit, or the measured track offset index OFFSET value is greater than the standard limit, it is determined that the track local accuracy is not up to standard, and the items exceeding the standard must be clearly marked.

4. The high-speed maglev track-specific measuring stand according to claim 1, characterized in that, The standard sample (4) has two positioning reference surfaces and four dial indicator reference surfaces. The positioning reference surface of the standard sample (4) matches the base surface of the magnetic base (2) on the track measuring table frame (1), and the dial indicator reference surface of the standard sample (4) corresponds to the position of the probe of the electronic dial indicator (3) on the track measuring table frame (1).

5. The high-speed maglev track-specific measuring stand according to claim 1, characterized in that, The magnetic base (2) is provided with a magnetic button (21), and the reference surfaces of the two magnetic bases (2) are on the same plane with a flatness error of no more than 0.04 mm and an error range of ±0.02 mm.

6. A measurement method for a high-speed maglev track dedicated measuring stand, applied to the high-speed maglev track dedicated measuring stand as described in any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Place the base surfaces of the magnetic bases (2) at both ends of the track measuring table frame (1) onto the positioning reference surface of the standard sample (4), and press the magnetic button (21) to make the track measuring table frame (1) and the standard sample (4) adhere and fix together. Step 2: Adjust the four electronic dial indicators (3) to 0 position one by one, and control the pointer compression of the electronic dial indicator (3) to about 0.5mm; Step 3: After the track measurement frame (1) has completed the 0-position calibration, set up measurement points on the stator surface, guide surface and sliding surface respectively, and fix the calibrated track measurement frame (1) to the reference surface of the high-speed maglev track to be tested by magnetic base (2). Step 4: After the pointer of the electronic dial indicator (3) stabilizes, read the measurement values ​​of the four electronic dial indicators (3) simultaneously and record them as a, b, c and d respectively. Step 5: Based on the collected values, calculate the track smoothness index NGK and the track offset index OFFSET using the formula. Step 6: Compare the calculated track smoothness index NGK and track offset index OFFSET with the accuracy standard values ​​of each functional surface of the high-speed maglev track to determine whether the local accuracy of the track meets the standard and to evaluate the effectiveness of the beam adjustment work.

7. The measurement method for a special measuring table frame for high-speed maglev tracks according to claim 6, characterized in that, It also includes the following steps: Step 7: After the measurement is completed, clean the dust and oil stains on the surface of the track measuring table frame (1) and the standard sample (4), apply anti-rust oil to its positioning surface and reference surface to form a protective layer, and store the track measuring table frame (1) and the standard sample (4) in a suitable location.

8. The measurement method for a special measuring table frame for high-speed maglev tracks according to claim 6, characterized in that, In step 5, the track smoothness index NGK and the track offset index OFFSET are calculated using formulas. The formula for calculating the track smoothness index NGK is as follows: NGK = 1.25 × |b - a + cd|; The formula for calculating the track offset index OFFSET is: OFFSET=(ad)+1.25×(ba-c+d).

9. The measurement method of the special measuring table frame for high-speed maglev track according to claim 6, characterized in that, in step 4, the specific operation of synchronously reading the measurement values ​​of four electronic dial gauges (3) and recording them as a, b, c, and d respectively includes: Obtain the set of transient reading sequences output by the four electronic dial gauges (3) within a preset continuous sampling period, and at the same time obtain the absolute temperature fluctuation parameters of the environment around the high-speed maglev track under test within the preset continuous sampling period. Based on the transient reading sequence set corresponding to each of the four electronic percentage meters (3), the initial time reading, the end time reading, and the middle time reading corresponding to each of the electronic percentage meters (3) are extracted; and based on the transient reading sequence set corresponding to each of the four electronic percentage meters (3), the reading fluctuation variance parameter of each of the electronic percentage meters (3) in the preset continuous sampling period is calculated. Finally, based on the extracted initial time reading, the final time reading, the midpoint time reading, the calculated reading fluctuation variance parameter, the obtained absolute temperature fluctuation parameter, and the preset micro-deformation nonlinear limit approximation formula, the absolute steady-state measurement compensation true values ​​of the four electronic dial gauges (3) are calculated respectively; wherein, the micro-deformation nonlinear limit approximation formula used is as follows: in, The calculated true value of the absolute steady-state measurement compensation corresponding to the electronic dial gauge (3); This represents the extracted reading at the initial time. This represents the extracted end-time reading; This represents the extracted reading at the center time. The high-frequency vibration attenuation suppression constant represents the high-frequency vibration that has been pre-calibrated for the metal substrate of the track measuring table (1); The calculated variance parameter representing the reading fluctuation; This represents the standard deviation obtained by performing a square root operation on the variance parameter of the reading fluctuation; Represents the logarithmic function with the natural constant as its base; This represents the obtained absolute temperature fluctuation parameter; This represents the preset temperature sensitivity normalization coefficient; This refers to a positive offset constant that is pre-set to prevent the logarithmic function from having zero or negative values, and the positive offset constant is limited to being greater than 0. The calculated true values ​​of each absolute steady-state measurement compensation are assigned to parameters a, b, c, and d, thereby triggering the execution of the subsequent step 5.

10. The measurement method for a dedicated measuring table frame for high-speed maglev tracks according to claim 6, characterized in that, in step 6, after determining whether the local accuracy of the track meets the standard, an intelligent collaborative guidance step for decoupling interference from multi-functional surface deformation is further executed, the intelligent collaborative guidance step including: Obtain the track smoothness index NGK and the track offset index OFFSET corresponding to the stator surface, the guide surface and the sliding surface of the high-speed maglev track under test at the same mileage position; When it is determined that any single index inside the stator surface, the guide surface, or the sliding surface at the same mileage position fails to meet the accuracy standard value, the stiffness transfer model pre-established for the high-speed maglev track under test is retrieved. Based on the stiffness transfer model, the track smoothness index NGK and the track offset index OFFSET corresponding to the stator surface, the track smoothness index NGK and the track offset index OFFSET corresponding to the guide surface, and the track smoothness index NGK and the track offset index OFFSET corresponding to the sliding surface, a three-dimensional spatial deformation linkage interference matrix covering the stator surface, the guide surface, and the sliding surface is constructed. Based on the constructed three-dimensional spatial deformation linkage interference matrix, the displacement vector that causes secondary deviations in the associated surfaces when an independent correction action is performed on a specific surface that has not reached the accuracy standard value is calculated. Finally, based on the calculated displacement vector, a multi-round collaborative approximation adjustment strategy to achieve global accuracy is calculated using a preset multi-objective optimization algorithm. Guidance instructions containing the beam adjustment sequence and the adjustment displacement amount of each round are sent to the external field maintenance terminal to prevent the phenomenon of linkage deterioration of related functional surfaces exceeding the accuracy standard value caused by isolated adjustment of local surfaces during maintenance operations.

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