Measurement precision calibration device for wheel tread profile tester

Abstract

The utility model provides a wheel tread profile tester measurement precision calibration device, which comprises a calibration substrate and a distance adjusting slide rail, the top surface of the calibration substrate is a calibration surface, and one end of the distance adjusting slide rail is vertically connected with the center of the lower side edge of the calibration surface; the central point of the calibration surface is taken as an original point, and the directions vertically pointing to the right side edge and the upper side edge of the calibration surface are respectively an X-axis forward direction and a Y-axis forward direction; a first calibration array, a second calibration array and a third calibration array which are convex are further arranged on the calibration surface, the first calibration array is distributed around the original point, the second calibration array is parallel to the X axis and is distributed close to the upper side edge of the calibration surface, and the third calibration array is located in the forward direction of the X axis and is distributed in a staggered mode in the forward direction of the Y axis; a tester is arranged on the distance adjusting sliding rail in a sliding mode, and the tester is close to / away from the calibration substrate along the distance adjusting sliding rail. The measurement precision calibration device has the advantage of being convenient to disassemble and assemble, and the calibration efficiency and the measurement precision are greatly improved through reasonable distribution of the multiple calibration arrays.

Description

Technical Field

[0001] This utility model relates to the technical field of rail transit vehicle testing equipment, and in particular to a wheel tread shape tester measurement accuracy calibration device. Background Technology

[0002] In recent years, the rail transit industry, including high-speed rail, subways, and urban rail transit, has developed rapidly. Major cities across the country have established rail transit lines. With rapid economic development and accelerated urbanization, rail transit passenger volume is on the rise, indicating huge market potential and broad prospects. The demand for metrology and testing in the rail transit industry is increasing daily, covering multiple aspects such as vehicle performance, equipment safety, and material quality. To ensure the safe operation of rail transit and improve operational efficiency, it is urgent to strengthen the research and application of metrology and testing technologies in the rail transit industry to meet the ever-upgrading needs of the industry and promote its healthy and sustainable development.

[0003] The wheel tread is a core component for train operation, bearing the load of the train and track while ensuring precise train operation and safe guidance. It is a key focus in railway vehicle inspection. The wheel tread profile tester is a portable instrument used to measure the dimensional parameters of railway vehicle wheel treads. This instrument uses a built-in camera and laser to capture the shape of the object being measured, such as the wheel profile. It can detect parameters such as wheel flange thickness, tread wear, QR value, wheel rim thickness, wheel rim width, and tread scratches. It is particularly suitable for testing wheel tread profile parameters in factories, production workshops, train inspection stations, station maintenance facilities, EMU depots, and urban subways under conditions where the wheel cannot be removed.

[0004] To ensure the calibration accuracy of the tester, it is necessary to perform self-testing and calibration before each use. However, there is currently no standardized accuracy calibration device that can effectively adjust the accuracy and stability of the tester. Therefore, this application aims to propose a standardized accuracy calibration device that can effectively adjust the accuracy and stability of the tester. Utility Model Content

[0005] To address the problems in the existing technology, this utility model proposes a wheel tread shape tester measurement accuracy calibration device to solve the above-mentioned problems.

[0006] This application proposes a calibration device for measuring the accuracy of a wheel tread shape tester, including a calibration base plate and an adjustable slide rail. The top surface of the calibration base plate is the calibration surface, and one end of the adjustable slide rail is perpendicularly connected to the center of the lower side of the calibration surface. Taking the center point of the calibration surface as the origin, the directions perpendicular to the right side and the upper side of the calibration surface are the positive X-axis and the positive Y-axis, respectively. The calibration surface is also provided with a first calibration array, a second calibration array, and a third calibration array. The first calibration array is distributed around the origin, the second calibration array is parallel to the X-axis and distributed close to the upper side of the calibration surface, and the third calibration array is located in the positive X-axis direction and is offset along the positive Y-axis direction. A tester is slidably mounted on the adjustable slide rail, and the tester moves closer to / away from the calibration base plate along the adjustable slide rail.

[0007] By adopting the above technical solution, when calibrating the tester, the operator can move the tester along the adjustable slide rail, allowing the tester to slide closer to / away from the calibration substrate. This adjusts the distance between the tester and the first, second, and third calibration arrays on the calibration substrate. The three calibration arrays are arranged as follows: the first calibration array is distributed around the origin, enabling comprehensive calibration of the tester's measurement accuracy in the central region, ensuring measurement accuracy at different angles and directions; the second calibration array is parallel to the X-axis and distributed near the upper side, calibrating measurements along the X-axis and supplementing calibration needs in the edge regions; and the third calibration array is located in the positive X-axis direction and staggered along the positive Y-axis direction, further increasing the diversity and comprehensiveness of calibration. This improves calibration accuracy in the X-axis direction while also adding calibration in the Y-axis direction, effectively enhancing overall measurement accuracy.

[0008] In some specific embodiments, the first calibration array, the second calibration array, and the third calibration array are all cylindrical arrays.

[0009] By adopting the above technical solution, the first calibration array, the second calibration array, and the third calibration array can effectively simulate the local shape on the wheel tread. Because the wheel tread has characteristics similar to a cylindrical surface to a certain extent, the calibrated tester can more closely approximate the actual measurement situation when measuring the wheel tread.

[0010] In some specific embodiments, the first calibration array includes point 1 located at the origin and points 2, 3, 4 and 5 distributed around point 1. Points 2, 3, 4 and 5 are located on a circle with a radius of 30 mm centered on point 1.

[0011] By adopting the above technical solution, point 1, located at the origin, serves as the central reference point, providing the testing instrument with a precise coordinate origin reference. During the measurement process, the testing instrument can establish an accurate measurement coordinate system based on this, ensuring the accuracy of subsequent measurement data in spatial position. Points 2, 3, 4, and 5, distributed around point 1, calibrate the measurement accuracy of the testing instrument in the surrounding area of ​​the center, forming a relatively uniform annular calibration area. This area can comprehensively detect the measurement accuracy of the testing instrument at different positions within this circle, effectively reducing errors caused by inconsistencies between the center and the periphery in measurement, thereby improving the overall calibration accuracy.

[0012] In some specific embodiments, the coordinates of points 1, 2, 3, 4, and 5 are (0,0), (-30,0), (-10,-28.284), (10,-28.284), and (30,0), respectively.

[0013] By adopting the above technical solution, point 1 is located at the origin, points 2 and 5 are located in the positive and negative directions of the X-axis, respectively, and points 3 and 4 are symmetrically distributed about the Y-axis. The precise coordinate values ​​enable the tester to accurately determine the positional relationship of each point during calibration measurements, thereby calibrating the measurement accuracy at different coordinate positions and reducing measurement errors. The precise and fixed coordinate values ​​facilitate accurate analysis and comparison of the measurement data by the operator after testing. The operator can directly compare the coordinate data of each point measured by the tester with the standard coordinate values, intuitively judge the measurement deviation of the tester at different positions, and thus make targeted adjustments and calibrations to the tester, improving the efficiency and accuracy of the calibration work.

[0014] In some specific embodiments, the second calibration array includes points 6, 7, 8, 9 and 10 arranged sequentially from the negative X-axis to the positive X-axis, and the second calibration array is a linear array with increasing spacing, the spacing increment being 10mm.

[0015] By adopting the above technical solution, the second calibration array is arranged with points 6 to 10 sequentially from the negative to the positive X-axis, forming a linear array with an increasing spacing of 10mm. This not only calibrates the measurement accuracy of the tester at different spacings and comprehensively tests its accuracy in various actual measurement scenarios, but also evaluates its linear direction measurement performance, improving its reliability when measuring the linear dimensions of wheel treads. By gradually increasing the calibration difficulty, it meticulously tests the performance at different measurement distances, identifies accuracy issues, and optimizes them accordingly. It simulates the different spacing requirements in actual wheel tread measurements, improving the tester's adaptability. The clear spacing increment pattern facilitates data comparison and analysis, allowing for rapid judgment of measurement performance for calibration and adjustment.

[0016] In some specific embodiments, the coordinates of points 6, 7, 8, 9, and 10 are (-70, 40), (-50, 40), (-20, 40), (20, 40), and (70, 40), respectively.

[0017] By adopting the above technical solution, the precise coordinate distribution provides the tester with accurate multi-position calibration references in the X-axis direction, which can calibrate the measurement accuracy at different X-axis positions and verify the linear measurement stability under a specific Y-axis coordinate. At the same time, the point spacing determined by these coordinates covers different lengths, which can comprehensively calibrate the accuracy of the tester in measuring different spacings, simulate the measurement scenarios of different positions and spacings in the X-axis direction in the actual measurement of wheel tread, improve the adaptability and accuracy of the tester in actual measurement, and facilitate the comparison of measurement data with standard coordinates to quickly determine measurement deviations and calibrate.

[0018] In some specific embodiments, the third calibration array includes points 11, 12, and 13, which are staggered from the negative Y-axis to the positive Y-axis. Points 11, 12, and 13 are all located to the right of the first calibration array and below the second calibration array.

[0019] By adopting the above technical solution, the third calibration array consists of points 11, 12, and 13, staggered from the negative Y-axis to the positive Y-axis, positioned to the right of the first calibration array and below the second calibration array. This layout offers multi-dimensional calibration advantages. Through staggered distribution, it can effectively calibrate the measurement accuracy of the tester at different Y-axis positions and staggered angles, supplementing the measurement blind spots not covered by the first two arrays and perfecting the all-round calibration system. At the same time, due to its specific orientation, it meets the measurement needs of the edges and oblique areas in the measurement of the complex shape of the wheel tread, enhancing the adaptability of the tester to the actual measurement environment, significantly improving measurement accuracy, and ensuring the comprehensiveness and accuracy of calibration.

[0020] In some specific embodiments, the coordinates of points 11, 12, and 13 are (40, -20), (50, -10), and (60, 30), respectively.

[0021] By adopting the above technical solution, the third calibration array constructs a unique calibration system with precise coordinates. These coordinate points are cleverly arranged, providing multi-dimensional calibration references for the tester based on different X and Y axis coordinate values. This enables precise calibration of measurement accuracy at different positions and angles, filling calibration gaps. It also meets the measurement needs of the complex shape of the wheel tread, effectively simulating measurement conditions at special points in actual measurements, enhancing the tester's adaptability to practical applications, and achieving accurate measurements. Furthermore, the clear coordinates facilitate comparison of measurement data with standard values, quickly locating measurement deviations.

[0022] In some specific embodiments, a tester bracket is also included, the bottom of which is slidably connected to the adjustable slide rail, and the bottom of the tester is detachably connected to the top of the tester bracket.

[0023] By adopting the above technical solution and adding an additional tester bracket, the tester can be detachably connected to the tester bracket, thereby achieving quick cooperation with the adjustable slide rail. This greatly improves the convenience of installation and replacement, allows the tester to be quickly removed from the tester bracket, improves work efficiency, and facilitates the replacement of suitable tester brackets for different models of testers, enhancing the overall versatility of the device.

[0024] Compared with the prior art, the beneficial effects of this application are as follows:

[0025] The wheel tread shape tester measurement accuracy calibration device of this application features an adjustable sliding rail, allowing operators to easily adjust the distance between the tester and the calibration array on the calibration base plate, providing flexible operation. The three calibration arrays are cleverly arranged: the first array is distributed around the origin, calibrating the measurement accuracy of the central area from all directions; the second array is parallel to the X-axis and close to the upper side, calibrating in the X-axis direction and supplementing the calibration needs of the edge areas; the third array is located in the positive X-axis direction and staggered along the positive Y-axis direction, increasing calibration diversity and comprehensiveness, improving calibration accuracy in the X and Y axes, and effectively enhancing overall measurement accuracy. Furthermore, all three calibration arrays are cylindrical arrays, which can well simulate the local shape of the wheel tread, making the calibrated tester measurements closer to reality. In addition, the tester bracket allows for quick and easy integration of the tester and the adjustable sliding rail, facilitating installation and replacement. Attached Figure Description

[0026] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0027] Figure 1 This is a schematic diagram of the measurement accuracy calibration device for a wheel tread shape tester according to an embodiment of this application;

[0028] Figure 2 This is a position feature diagram of the wheel tread profile curve according to an embodiment of this application;

[0029] Figure 3 This is a top view of the calibration surface according to an embodiment of this application.

[0030] The meaning of each number in the diagram:

[0031] Calibration substrate 01, adjustable slide rail 02, calibration surface 03, first calibration array 04, point 1 041, point 2 042, point 3 043, point 4 044, point 5 045, second calibration array 05, point 6 051, point 7 052, point 8 053, point 9 054, point 10 055, third calibration array 06, point 11 061, point 12 062, point 13 063, tester 07, tester bracket 08. Detailed Implementation

[0032] In the following detailed description, reference is made to the accompanying drawings, which form part of the detailed description and illustrate illustrative specific embodiments in which the present invention may be practiced. In this regard, directional terms such as “top,” “bottom,” “left,” “right,” “up,” “down,” etc., are used with reference to the orientation of the described figures. Because components of the embodiments can be positioned in several different orientations, directional terms are used for illustrative purposes and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0033] This application proposes a calibration device for the measurement accuracy of a wheel tread shape tester 07. Figure 1 A schematic diagram of the measurement accuracy calibration device for the wheel tread shape tester 07 according to an embodiment of this application is shown, as follows: Figure 1 As shown, the measurement accuracy calibration device includes a calibration base plate 01 and an adjustable slide rail 02. The top surface of the calibration base plate 01 is the calibration surface 03. One end of the adjustable slide rail 02 is perpendicularly connected to the center of the lower side of the calibration surface 03. Taking the center point of the calibration surface 03 as the origin, the directions perpendicular to the right side and the upper side of the calibration surface 03 are the positive X-axis and the positive Y-axis, respectively. The calibration surface 03 is also provided with a first calibration array 04, a second calibration array 05, and a third calibration array 06. The first calibration array 04 is distributed around the origin. The second calibration array 05 is parallel to the X-axis and distributed close to the upper side of the calibration surface 03. The third calibration array 06 is located in the positive X-axis direction and is staggered along the positive Y-axis direction. A tester 07 is slidably disposed on the adjustable slide rail 02. The tester 07 moves closer to / away from the calibration base plate 01 along the adjustable slide rail 02 (i.e., along the Y-axis direction).

[0034] Specifically, the tester 07 in this embodiment is a non-contact tread profile tester. This tester 07 acquires the profile of the object being measured, such as a wheel profile, through a built-in camera and laser. Figure 2 A positional feature diagram of the wheel tread profile curve according to an embodiment of this application is shown. Please also refer to... Figure 1 and Figure 2In the curve position characteristics of the wheel tread profile, Fw represents the flange thickness, Fh represents the flange height, QR represents the flange slope, point A represents the vertical downward h1 position of the tread curve apex, the tread base point O represents the position L (70mm) inward from the rim surface of the flange tread curve, and point B represents the upward H position of the tread curve L (70mm) position point (tread base point).

[0035] Considering the form and manufacture of standardized measurement accuracy calibration devices, their traceability methods can be carried out by using coordinate measurement and optical image measurement to trace the values. This sets requirements for the metrological characteristics of the measurement accuracy calibration devices, among which the dimensional measurement uncertainty is required to be no greater than 0.02 mm.

[0036] Based on this, the specific coordinate values ​​and shape features of the first calibration array 04, the second calibration array 05, and the third calibration array 06 on the calibration surface 03 of the standardized measurement accuracy calibration device are further optimized.

[0037] By adopting the above technical solution, when calibrating the tester 07, the operator can move the tester 07 along the adjustable slide rail 02, causing the tester 07 to slide closer to / away from the calibration substrate 01, thereby adjusting the distance between the tester 07 and the first calibration array 04, the second calibration array 05, and the third calibration array 06 on the calibration substrate 01. Simultaneously, three calibration arrays are set up: the first calibration array 04 is distributed around the origin, enabling comprehensive calibration of the measurement accuracy of the tester 07 in the central area, ensuring measurement accuracy at different angles and directions; the second calibration array 05 is parallel to the X-axis and distributed near the upper side, allowing calibration of measurements in the X-axis direction, supplementing the calibration needs of the edge areas; the third calibration array 06 is located in the positive X-axis direction and staggered along the positive Y-axis direction, further increasing the diversity and comprehensiveness of calibration, improving calibration accuracy in the X-axis direction while also adding calibration in the Y-axis direction, thereby effectively improving the overall measurement accuracy.

[0038] In some specific embodiments, the first calibration array 04, the second calibration array 05, and the third calibration array 06 are all cylindrical arrays.

[0039] More specifically, in order to adapt to the calibration scenarios of most non-contact wheel tread shape testers, the first calibration array 04, the second calibration array 05, and the third calibration array 06 are all composed of cylindrical arrays with a diameter of 8mm.

[0040] As a standard geometric shape, the cylinder has definite dimensional parameters. During the calibration of the tester 07, the precise shape of the cylinder can provide an accurate calibration reference for the tester 07. At the same time, the wheel rim and other parts of the wheel tread have similar cylindrical features, which enables the first calibration array 04, the second calibration array 05, and the third calibration array 06 to simulate the local shape of the wheel tread.

[0041] By adopting the above technical solution, the first calibration array 04, the second calibration array 05, and the third calibration array 06 can effectively simulate the local shape on the wheel tread. Because the wheel tread has characteristics similar to a cylindrical surface to a certain extent, the calibrated tester 07 can more closely approximate the actual measurement situation when measuring the wheel tread.

[0042] Figure 3 A top view of calibration surface 03 according to an embodiment of this application is shown, as follows: Figure 1-3 As shown, the first calibration array 04 includes point 1 041 located at the origin and points 2 042, 3 043, 4 044 and 5 045 distributed around point 1 041. Points 2 042, 3 043, 4 044 and 5 045 are located on a circle with a radius of 30mm centered on point 1 041.

[0043] Specifically, a coordinate system is constructed with point 1 (041) as the origin. A circle with a radius of 30 mm is drawn around point 1 (041). Points 2 (042), 3 (043), 4 (044), and 5 (045) are distributed around point 1 (041) on this circle. Points 2 (042) and 5 (045) are located in the positive and negative directions of the X-axis, respectively, and are symmetrical with respect to the Y-axis. Points 3 (043) and 4 (044) are located in the third and fourth quadrants, respectively, and are symmetrical with respect to the Y-axis.

[0044] By adopting the above technical solution, point 1 (041) located at the origin serves as the central reference point, providing a precise coordinate origin reference for the testing instrument 07. During the measurement process, the testing instrument 07 can establish an accurate measurement coordinate system based on this, ensuring the accuracy of subsequent measurement data in spatial position. Points 2 (042), 3 (043), 4 (044), and 5 (045), distributed around point 1 (041), calibrate the measurement accuracy of the testing instrument 07 in the surrounding area of ​​the center, forming a relatively uniform annular calibration area. This area can comprehensively detect the measurement accuracy of the testing instrument 07 at different locations within this circular range, effectively reducing errors caused by inconsistencies in measurement deviations between the center and the periphery, thereby improving the overall calibration accuracy.

[0045] In some specific embodiments, the coordinates of point 041, point 042, point 043, point 044, and point 045 are (0,0), (-30,0), (-10,-28.284), (10,-28.284), and (30,0), respectively.

[0046] By adopting the above technical solution, point 1 (041) is located at the origin, points 2 (042) and 5 (045) are located in the positive and negative directions of the X-axis, respectively, and points 3 (043) and 4 (044) are symmetrically distributed about the Y-axis. The precise coordinate values ​​enable the tester 07 to accurately determine the positional relationship of each point during calibration measurements, thereby calibrating its measurement accuracy at different coordinate positions and reducing measurement errors. The precise and fixed coordinate values ​​facilitate accurate analysis and comparison of the measurement data by the operator after testing. The operator can directly compare the coordinate data of each point measured by the tester 07 with the standard coordinate values, intuitively judge the measurement deviation of the tester 07 at different positions, and thus make targeted adjustments and calibrations to the tester 07, improving the efficiency and accuracy of the calibration work.

[0047] In some specific embodiments, the second calibration array 05 includes points 6 (051), 7 (052), 8 (053), 9 (054), and 10 (055) arranged sequentially from the negative X-axis to the positive X-axis, and the second calibration array 05 is a linear array with increasing spacing, the spacing increment being 10 mm.

[0048] Specifically, the second calibration array 05 is located above the first calibration array 04, near the upper side of the calibration surface 03, which can maximize the calibration of the coordinates in the X-axis direction. Points 6 (051), 7 (052), 8 (053), 9 (054), and 10 (055) are linearly distributed from left to right, and the spacing between each point increases by 10mm in turn. This gradually changing spacing setting can more precisely detect the measurement accuracy of the tester 07 at different measurement distances, especially the accuracy drop when measuring larger distances, so as to make targeted adjustments and optimizations.

[0049] By adopting the above technical solution, the second calibration array 05 is arranged with points 6 (051) to 10 (055) sequentially from the negative to the positive X-axis, forming a linear array with an increasing spacing of 10mm. This not only calibrates the measurement accuracy of the tester 07 at different spacings and comprehensively tests its accuracy in various actual measurement scenarios, but also evaluates its linear direction measurement performance, improving its reliability when measuring the linear dimensions of wheel treads. By gradually increasing the calibration difficulty, it meticulously tests the performance at different measurement distances, identifies accuracy issues, and optimizes them accordingly. It simulates the different spacing requirements in actual wheel tread measurements, improving the adaptability of the tester 07. The clear spacing increment pattern facilitates data comparison and analysis, allowing for rapid judgment of measurement performance for calibration and adjustment.

[0050] In some specific embodiments, the coordinates of point 6 051, point 7 052, point 8 053, point 9 054, and point 10 055 are (-70,40), (-50,40), (-20,40), (20,40), and (70,40), respectively.

[0051] By adopting the above technical solution, the precise coordinate distribution provides the tester 07 with accurate multi-position calibration reference in the X-axis direction. It can calibrate the measurement accuracy at different X-axis positions and verify the linear measurement stability under a specific Y-axis coordinate. At the same time, the point spacing determined by these coordinates covers different lengths, which can comprehensively calibrate the accuracy of the tester 07 in measuring different spacings. It simulates the measurement scenarios of different positions and spacings in the X-axis direction in the actual measurement of wheel tread, improves the adaptability and accuracy of the tester 07 in actual measurement, and also facilitates the comparison of measurement data with standard coordinates, quickly judges measurement deviations and calibrates them.

[0052] In some specific embodiments, the third calibration array 06 includes points 11 (061), 12 (062), and 13 (063) that are staggered from the negative Y-axis to the positive Y-axis. Points 11 (061), 12 (062), and 13 (063) are all located to the right of the first calibration array 04 and below the second calibration array 05.

[0053] Specifically, points 11 (061) and 12 (062) are located in the negative direction of the Y-axis, and point 13 (063) is located in the positive direction of the Y-axis. The coordinate values ​​of points 11 (061), 12 (062), and 13 (063) in the X-axis direction increase sequentially.

[0054] By adopting the above technical solution, the third calibration array 06 consists of points 061 (11), 062 (12), and 063 (13), which are staggered from the negative Y-axis to the positive Y-axis. Its position is set to the right of the first calibration array 04 and below the second calibration array 05. This layout offers multi-dimensional calibration advantages. Through staggered distribution, it can effectively calibrate the measurement accuracy of the tester 07 at different Y-axis positions and staggered angles, supplementing the measurement blind spots not covered by the first two arrays and perfecting the comprehensive calibration system. Simultaneously, due to its specific orientation, it meets the measurement needs of edges and oblique areas in the measurement of complex wheel tread shapes, enhancing the adaptability of the tester 07 to actual measurement environments, significantly improving measurement accuracy, and ensuring the comprehensiveness and accuracy of calibration.

[0055] In some specific embodiments, the coordinates of point 061 (11), point 062 (12), and point 063 (13) are (40, -20), (50, -10), and (60, 30), respectively.

[0056] Specifically, taking into account the coordinates of each point in the first calibration array 04, the second calibration array 05, and the third calibration array 06, the second calibration array 05 mainly focuses on calibration in the X-axis direction, and the points 11 (061), 12 (062), and 13 (063) of the third calibration array 06, combined with point 5 (045) of the first calibration array 04, can mainly improve the calibration accuracy in the Y-axis direction, while the first calibration array 04 comprehensively considers the calibration accuracy in both the X and Y axes.

[0057] By adopting the above technical solution, the third calibration array 06 constructs a unique calibration system with precise coordinates. These coordinate points are cleverly arranged, providing multi-dimensional calibration references for the tester 07 based on different X and Y axis coordinate values. This enables precise calibration of measurement accuracy at different positions and angles, filling calibration gaps. It also meets the measurement needs of the complex shape of the wheel tread, effectively simulating measurement conditions at special points in actual measurements, enhancing the practical application adaptability of the tester 07, and achieving accurate measurement. Furthermore, the clear coordinates facilitate comparison of measurement data with standard values, quickly locating measurement deviations.

[0058] In some specific embodiments, a tester bracket 08 is also included, the bottom of which is slidably connected to the adjustable slide rail 02, and the bottom of the tester 07 is detachably connected to the top of the tester bracket 08.

[0059] Specifically, the tester bracket 08 can be a rod-shaped bracket or a quick-release bracket formed by multiple quick-release bolts. At the same time, the bottom of the tester bracket 08 can be equipped with an integrated slider (not shown in the figure) for sliding engagement with the adjustable slide rail 02, or it can be equipped with a separate slider for detachable engagement with the bottom of the tester bracket 08, thereby improving the convenience of the device during disassembly and maintenance.

[0060] By adopting the above technical solution and additionally setting up a tester bracket 08, the tester 07 can be detachably connected to the tester bracket 08, thereby achieving quick cooperation with the adjustable slide rail 02, which greatly improves the convenience of installation and replacement. The tester 07 can be quickly removed from the tester bracket 08, improving work efficiency. It also facilitates the replacement of the appropriate tester bracket 08 for different models of testers 07, enhancing the overall versatility of the device.

[0061] Compared with the prior art, the beneficial effects of this application are as follows:

[0062] The wheel tread shape tester 07 measurement accuracy calibration device of this application, through the setting of the adjustable slide rail 02, allows the operator to easily adjust the distance between the tester 07 and the calibration array on the calibration base plate 01, making operation flexible. The three calibration arrays are cleverly arranged: the first calibration array 04 is distributed around the origin, calibrating the measurement accuracy of the central area from all directions; the second calibration array 05 is parallel to the X-axis and close to the upper side, calibrating in the X-axis direction and supplementing the calibration needs of the edge areas; the third calibration array 06 is located in the positive X-axis direction and staggered along the positive Y-axis direction, increasing the diversity and comprehensiveness of calibration, improving the calibration accuracy in the X and Y axes, and effectively improving the overall measurement accuracy. At the same time, all three calibration arrays are cylindrical arrays, which can well simulate the local shape of the wheel tread, making the measurements of the calibrated tester 07 closer to reality. Furthermore, the setting of the tester bracket 08 allows the tester 07 and the adjustable slide rail 02 to quickly connect, making installation and replacement convenient.

[0063] Obviously, those skilled in the art can make various modifications and changes to the embodiments of this utility model without departing from the spirit and scope of this utility model. In this way, this utility model is also intended to cover such modifications and changes if they fall within the scope of the claims of this utility model and their equivalents. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are described in mutually different dependent claims does not indicate that a combination of these measures cannot be used for profit. Any reference numerals in the claims should not be considered as limiting the scope.

Claims

1. A calibration device for the measurement accuracy of a wheel tread shape tester, characterized in that, The system includes a calibration substrate and an adjustable slide rail. The top surface of the calibration substrate is the calibration surface, and one end of the adjustable slide rail is perpendicularly connected to the center of the lower side of the calibration surface. Taking the center point of the calibration surface as the origin, the directions perpendicular to the right side and the top side of the calibration surface are the positive X-axis and the positive Y-axis, respectively. The calibration surface is also provided with a first calibration array, a second calibration array, and a third calibration array. The first calibration array is distributed around the origin, the second calibration array is parallel to the X-axis and distributed close to the upper side of the calibration surface, and the third calibration array is located in the positive X-axis direction and is offset along the positive Y-axis direction. A tester is slidably mounted on the adjustable slide rail, and the tester moves closer to / away from the calibration substrate along the adjustable slide rail.

2. The measurement accuracy calibration device according to claim 1, characterized in that, The first calibration array, the second calibration array, and the third calibration array are all cylindrical arrays.

3. The measurement accuracy calibration device according to claim 1, characterized in that, The first calibration array includes point 1 located at the origin and points 2, 3, 4 and 5 distributed around point 1. Points 2, 3, 4 and 5 are located on a circle with a radius of 30 mm centered on point 1.

4. The measurement accuracy calibration device according to claim 3, characterized in that, The coordinates of points 1, 2, 3, 4, and 5 are (0,0), (-30,0), (-10,-28.284), (10,-28.284), and (30,0), respectively.

5. The measurement accuracy calibration device according to claim 1, characterized in that, The second calibration array includes points 6, 7, 8, 9 and 10 arranged sequentially from the negative X-axis to the positive X-axis, and the second calibration array is a linear array with increasing spacing, with a spacing increment of 10 mm.

6. The measurement accuracy calibration device according to claim 5, characterized in that, The coordinates of points 6, 7, 8, 9, and 10 are (-70, 40), (-50, 40), (-20, 40), (20, 40), and (70, 40), respectively.

7. The measurement accuracy calibration device according to claim 1, characterized in that, The third calibration array includes points 11, 12, and 13, which are staggered from the negative Y-axis to the positive Y-axis. Points 11, 12, and 13 are all located to the right of the first calibration array and below the second calibration array.

8. The measurement accuracy calibration device according to claim 7, characterized in that, The coordinates of points 11, 12, and 13 are (40, -20), (50, -10), and (60, 30), respectively.

9. The measurement accuracy calibration device according to claim 1, characterized in that, It also includes a tester bracket, the bottom of which is slidably connected to the adjustable slide rail, and the bottom of the tester is detachably connected to the top of the tester bracket.

Images