阅读说明：本技术 一种车轮内侧距测量装置、系统及测量方法 (Device, system and method for measuring inner side distance of wheel ) 是由 吴耿才 徐昌源 刘斌 冯其波 朱晓东 秦军 潘文峰 郑杰锋 于 2021-09-24 设计创作，主要内容包括：本发明公开了一种车轮内侧距测量装置、系统及测量方法,包括支架,所述支架包括底板,所述底板上设有激光传感器和相机,所述激光传感器向车轮内侧扫射激光,所述相机的照射范围覆盖所述激光传感器的扫射范围,若干所述车轮内侧距测量装置间隔放置在两条平行的第一铁轨和第二铁轨的中间,还包括设于所述左车轮外侧的第三激光传感器和设于右车轮外侧的第四激光传感器,通过在铁轨的内侧和外侧分别设置激光传感器和相机,将获取的车轮的内侧面和外侧面的数据融合到一个坐标系里进行换算得出车轮内侧距距离,提高测量的准确率。(The invention discloses a wheel inner side distance measuring device, a wheel inner side distance measuring system and a wheel inner side distance measuring method, wherein the wheel inner side distance measuring device comprises a support, the support comprises a bottom plate, a laser sensor and a camera are arranged on the bottom plate, the laser sensor scans laser towards the inner side of a wheel, the irradiation range of the camera covers the scanning range of the laser sensor, a plurality of wheel inner side distance measuring devices are arranged between two parallel first rails and two parallel second rails at intervals, the wheel inner side distance measuring device further comprises a third laser sensor arranged on the outer side of a left wheel and a fourth laser sensor arranged on the outer side of a right wheel, the laser sensor and the camera are respectively arranged on the inner side and the outer side of the rails, the obtained data of the inner side surface and the outer side surface of the wheel are fused into a coordinate system to be converted to obtain the wheel inner side distance, and the measuring accuracy is improved.)

1. The utility model provides an inboard apart from measuring device of wheel, its characterized in that, includes support (1), support (1) includes bottom plate (10), be equipped with laser sensor (2) and camera (3) on bottom plate (10), laser sensor (2) are to the inboard laser of sweeping of wheel, the irradiation range of camera (3) covers the sweep scope of laser sensor (2), laser sensor (2) with the data that camera (3) acquireed are uploaded to the controller and are carried out the range finding.

2. The wheel inner side distance measuring device according to claim 1, wherein the laser sensor (2) and the camera (3) are provided at both ends of the base plate (10) in the longitudinal direction, respectively.

3. The wheel inner side distance measuring device according to claim 2, characterized in that the laser sensor (2) comprises a first laser sensor (20) and a second laser sensor (21), the first laser sensor (20) and the second laser sensor (21) are respectively arranged at two angular positions of the same end of the bottom plate (10), and the first laser sensor (20) and the second laser sensor (21) respectively sweep laser outwards.

4. The wheel inner side distance measuring device according to claim 3, wherein the camera (3) comprises a first camera (30) and a second camera (31), the first camera (30) and the second camera (31) are respectively arranged on two angular positions of the same end part of the bottom plate (10), and the shooting range of the first camera (30) covers the radiation range of the first laser sensor (20); the shooting range of the second camera (31) covers the radiation range of the second laser sensor (21).

5. The wheel inner side distance measuring device according to claim 4, characterized in that a supporting leg (11) is arranged at the bottom of the bottom plate (10), a housing (12) is sleeved on the bottom plate (10), and glass windows (120) corresponding to the first laser sensor (20), the second laser sensor (21), the first camera (30) and the second camera (31) one by one are arranged on the side surface of the housing (12).

6. A wheel inner side distance measuring system, comprising a plurality of wheel inner side distance measuring devices (100) according to any one of claims 1 to 5, wherein a plurality of said wheel inner side distance measuring devices (100) are spaced apart and placed in the middle of two parallel first rails (4) and second rails (5), and wherein the top surface of said wheel inner side distance measuring devices (100) is lower than said first rails (4) and said second rails (5); the first rail (4) is used for driving a left wheel (6), and the second rail (5) is used for driving a right wheel (7);

the device is characterized by further comprising a third laser sensor (8) arranged on the outer side of the left wheel (6) and a fourth laser sensor (9) arranged on the outer side of the right wheel (7), wherein the third laser sensor (8) emits laser towards the obliquely upper direction to scan the outer side surface of the left wheel (6), and the fourth laser sensor (9) emits laser towards the obliquely upper direction to scan the outer side surface of the right wheel (7);

the controller is further included for ranging based on the wheel inner side distance measurement (100) and data measured by the third laser sensor (8) and the fourth laser sensor (9).

7. The wheel inner side distance measuring system according to claim 6, wherein the first laser sensor (20) in the wheel inner side distance measuring device (100) emits laser light obliquely upward to scan the inner side surface of the left wheel (6), and the second laser sensor (21) emits laser light obliquely upward to scan the inner side surface of the right wheel (7).

8. A method of measuring the inner wheel side distance using the inner wheel side distance measuring system according to claim 7, comprising the steps of:

when a train wheel pair runs, the wheel inner side distance measuring system is excited to work, the left wheel (6) and the right wheel (7) are replaced by two plane plates (14) which are connected together through a connecting rod (13), the length of the connecting rod (13) is L, and the thickness of the plane plate (14) is T;

the first laser sensor (20) and the third laser sensor (8) respectively scan the inner plane and the outer plane of the plane plate (14); the second laser sensor (21) and the fourth laser sensor (9) respectively scan the inner plane and the outer plane of the other plane plate (14);

acquiring data of the first laser sensor (20), the second laser sensor (21), the third laser sensor (8) and the fourth laser sensor (9) and calibrating the data into a unified coordinate system, wherein a raw data coordinate system of the first laser sensor (20) is a first coordinate system, a raw data coordinate system of the second laser sensor (21) is a second coordinate system, a raw data coordinate system of the third laser sensor (8) is a third coordinate system, and a raw data coordinate system of the fourth laser sensor (9) is a fourth coordinate system;

measuring two surfaces of the same plane plate (14) by using the third laser sensor (8) outside the left side rail and the first laser sensor (20) in the left side rail, and obtaining the coordinate values of the left plane and the right plane which are x respectively₁And x₂And calculating the distance between the origin of the first coordinate system and the origin of the third coordinate system by adopting the following formula:

D_l＝x₁+x₂+T；

when scanning the wheel, the X-axis coordinate of a point obtained by the third laser sensor (8) outside the left side rail is X_oThe X-axis coordinate of the point is transferred to the coordinate system of the first laser sensor (20) in the left side railIs calculated by the method x_i＝D_l-x_o；

And fusing the acquired original coordinate system data of the third laser sensor (8) and the coordinate system data of the first laser sensor (20) to obtain the inner side distance of the wheel.

9. The method of measuring the inner wheel base as claimed in claim 8,

and after the X-axis coordinate of the point obtained by the third laser sensor (8) outside the left side rail is transferred to the coordinate system of the first laser sensor (20) inside the left side rail, fusing the obtained original coordinate system data of the third laser sensor (8) with the coordinate system data of the first laser sensor (20).

10. The method of claim 8, wherein the X-axis coordinate obtained when the second laser sensor (21) in the right side rail is scanned on the flat plate (14) is X when measuring the inner side distance of the wheel₃The X-axis coordinate obtained when the first laser sensor (20) in the left side rail scans the inner side surface of the wheel is defined as X_lThe X-axis coordinate obtained when the second laser sensor (21) in the right side rail scans the inner side surface of the wheel is X_rThen, the following formula is used to calculate the wheel inner side distance:

inner wheel distance (x)_l-x₁)+(x_r-x₃)+L。

Technical Field

The invention relates to the technical field of measurement of inner side surfaces of wheels, in particular to a device, a system and a method for measuring an inner side distance of a wheel.

Background

The wheel inner distance of the current rail train is obtained by directly measuring the distance between the outer side surfaces of the left and right wheels and then subtracting the thickness of the wheels. According to national standards and industry practice, the rim thickness is measured on the inside of the wheel. At present, no special sensor is arranged to measure the position of the inner side surface of the wheel, and the outer side surface is used as a reference, and the inner side is deviated by 135mm to be used as a measurement reference of the thickness of the wheel rim. There may be large deviations in part wheel thickness from the 135mm gauge value, which in turn results in large deviations in the inboard distance and rim dimensional data measured using this method.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a device, a system and a method for measuring an inner side distance of a wheel, which can improve the measurement accuracy.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an inboard side distance measuring device of wheel, includes the support, the support includes the bottom plate, be equipped with laser sensor and camera on the bottom plate, laser sensor sweeps laser to the wheel inboard, the irradiation range of camera covers laser sensor's sweep scope, laser sensor with the data that the camera acquireed upload to the controller and carry out the range finding.

Further, the laser sensor and the camera are respectively arranged at two end parts of the bottom plate along the length direction.

Furthermore, the laser sensor comprises a first laser sensor and a second laser sensor, the first laser sensor and the second laser sensor are respectively arranged on two angular positions of the same end part of the bottom plate, and the first laser sensor and the second laser sensor respectively scan laser outwards.

Further, the camera comprises a first camera and a second camera, the first camera and the second camera are respectively arranged on two angular positions of the same end part of the bottom plate, and the shooting range of the first camera covers the radiation range of the first laser sensor; the shooting range of the second camera covers the radiation range of the second laser sensor.

Furthermore, the bottom of the bottom plate is provided with supporting legs, the bottom plate is sleeved with a shell, and the side surface of the shell is provided with glass windows which correspond to the first laser sensor, the second laser sensor, the first camera and the second camera one to one respectively.

A wheel inner side distance measuring system comprises the wheel inner side distance measuring devices, a plurality of wheel inner side distance measuring devices are arranged between two parallel first rails and second rails at intervals, and the top surfaces of the wheel inner side distance measuring devices are lower than the first rails and the second rails; the first rail is used for driving a left wheel, and the second rail is used for driving a right wheel;

the device also comprises a third laser sensor arranged on the outer side of the left wheel and a fourth laser sensor arranged on the outer side of the right wheel, wherein the third laser sensor emits laser towards the oblique upper direction to scan the outer side surface of the left wheel, and the fourth laser sensor emits laser towards the oblique upper direction to scan the outer side surface of the right wheel;

the controller is used for ranging according to the data measured by the wheel inner side distance measuring device and the third laser sensor and the fourth laser sensor.

Furthermore, the first laser sensor in the wheel inner side distance measuring device emits laser towards the obliquely upper direction to scan the inner side surface of the left wheel, and the second laser sensor emits laser towards the obliquely upper direction to scan the inner side surface of the right wheel.

A method of measuring the inboard distance of a wheel using said inboard distance measuring system, comprising the steps of:

when a train wheel pair runs, the wheel inner side distance measuring system is excited to work, the left wheel and the right wheel are replaced by two plane plates which are connected together through a connecting rod, the length of the connecting rod is L, and the thickness of each plane plate is T;

the first laser sensor and the third laser sensor respectively scan the inner plane and the outer plane of the plane plate; the second laser sensor and the fourth laser sensor respectively scan the inner plane and the outer plane of the other plane plate;

acquiring data of the first laser sensor, the second laser sensor, the third laser sensor and the fourth laser sensor and calibrating the data into a unified coordinate system, wherein a raw data coordinate system of the first laser sensor is a first coordinate system, a raw data coordinate system of the second laser sensor is a second coordinate system, a raw data coordinate system of the third laser sensor is a third coordinate system, and a raw data coordinate system of the fourth laser sensor is a fourth coordinate system;

measuring two surfaces of the same plane plate by using the third laser sensor outside the left side rail and the first laser sensor inside the left side rail, and obtaining the coordinate values of the left plane and the right plane which are x respectively₁And x₂And calculating the distance between the origin of the first coordinate system and the origin of the third coordinate system by adopting the following formula:

D_l＝x₁+x₂+T；

when scanning the wheel, the X-axis coordinate of a point obtained by the third laser sensor outside the left side rail is X_oThe calculation method for transferring the X-axis coordinate of the point to the coordinate system of the first laser sensor in the left side rail is X_i＝D_l-x_o；

And fusing the acquired original coordinate system data of the third laser sensor and the coordinate system data of the first laser sensor to obtain the inner side distance of the wheel.

Further, after the X-axis coordinate of a point obtained by the third laser sensor outside the left side rail is transferred to the coordinate system of the first laser sensor inside the left side rail, the obtained original coordinate system data of the third laser sensor and the coordinate system data of the first laser sensor are fused.

Further, when the inner side distance of the wheel is measured, the X-axis coordinate obtained when the second laser sensor in the right side rail scans the plane plate is X₃And the X-axis coordinate obtained when the first laser sensor in the left side rail scans the inner side surface of the wheel is defined as X_lThe X-axis coordinate obtained when the second laser sensor in the right side rail scans the inner side surface of the wheel is X_rThen, the following formula is used to calculate the wheel inner side distance:

inner wheel distance (x)_l-x₁)+(x_r+x₃)+L。

The invention has the beneficial effects that: the embodiment of the invention provides a device, a system and a method for measuring the inner side distance of a wheel, which comprises a bracket, the bracket comprises a bottom plate and supporting legs arranged at four angular positions of the bottom plate, the bottom plate is provided with a laser sensor and a camera, the laser sensor scans laser to the inner side of the wheel, the irradiation range of the camera covers the scanning range of the laser sensor, the wheel inner side distance measuring devices are arranged between the first rail and the second rail which are parallel at intervals, the laser wheel inner side distance measuring device further comprises a third laser sensor arranged on the outer side of the left wheel and a fourth laser sensor arranged on the outer side of the right wheel, the laser sensor and the camera are respectively arranged on the inner side and the outer side of the rail, so that the acquired data of the inner side face and the outer side face of the wheel are fused into a coordinate system to be converted to obtain the distance between the inner side of the wheel, and the accuracy of measurement is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is an exploded view of an inner wheel distance measuring device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an inner wheel distance measuring device according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a wheel inner side distance measuring system according to an embodiment of the present invention;

FIG. 4 is a flowchart illustrating steps of a method for measuring the inboard distance of a wheel according to an embodiment of the present invention;

fig. 5 is a calibration chart of a method for measuring the inner distance of a wheel according to an embodiment of the present invention.

In the figure: 100. a wheel inner side distance measuring device; 1. a support; 10. a base plate; 11. supporting legs; 12. a housing; 13. a connecting rod; 14. a flat plate; 120. a glass window; 2. a laser sensor; 20. a first laser sensor; 21. a second laser sensor; 3. a camera; 30. a first camera; 31. a second camera; 4. a first rail; 5. a second rail; 6. a left wheel; 7. a right wheel; 8. a third laser sensor; 9. and a fourth laser sensor.

Detailed Description

The embodiment of the invention provides a device and a system for measuring the inner side distance of a wheel and a measuring method, and the measuring accuracy is improved.

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. Referring to fig. 1, fig. 1 is an exploded view of an inner wheel distance measuring device according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of an inner wheel distance measuring device according to an embodiment of the present invention.

The first embodiment is as follows:

as shown in fig. 1 and 2, a wheel inner side distance measuring device 100 includes a support 1, the support 1 includes a bottom plate 10, a laser sensor 2 and a camera 3 are arranged on the bottom plate 10, the laser sensor 2 scans laser to the wheel inner side, an irradiation range of the camera 3 covers a scanning range of the laser sensor 2, and data acquired by the laser sensor 2 and the camera 3 are uploaded to a controller for distance measurement.

Specifically, as shown in fig. 1, a wheel inner side distance measuring device 100 is designed, which comprises a support 1, the support 1 comprises a bottom plate 10, a laser sensor 2 and a camera 3 are arranged on the bottom plate 10, the laser sensor 2 scans laser to the wheel inner side, the irradiation range of the camera 3 covers the scanning range of the laser sensor 2, the laser scanning is carried out on the wheel inner side through the laser sensor 2, corresponding data are acquired through the camera 3, and data fusion calculation is carried out by combining the laser sensor on the wheel outer side to obtain the data of the wheel inner side distance.

Further, the laser sensor 2 and the camera 3 are respectively provided at both ends of the base plate 10 in the longitudinal direction.

Specifically, as shown in fig. 1, the laser sensor 2 and the camera 3 are respectively disposed at two end portions of the bottom plate 10, and are respectively disposed at four angular positions of the two end portions, the laser sensor 2 is scanned outwards, the camera 3 is photographed inwards, a scanning range of the laser sensor 2 is photographed, and a horizontal width of a range which can be scanned by a single laser sensor at a time is 50 cm.

Further, the laser sensor 2 includes a first laser sensor 20 and a second laser sensor 21, the first laser sensor 20 and the second laser sensor 21 are respectively disposed at two angular positions of the same end portion of the bottom plate 10, and the first laser sensor 20 and the second laser sensor 21 respectively scan laser outwards.

Specifically, as shown in fig. 1, two laser sensors 2 are provided, which are respectively a laser sensor 20 and a second laser sensor 21, the first laser sensor 20 and the second laser sensor 21 are respectively disposed on two angular positions of the same end portion of the bottom plate 10, the first laser sensor 20 and the second laser sensor 21 respectively scan laser outwards, and the horizontal width of a range that each laser sensor can scan at one time is 50 cm.

Further, the camera 3 includes a first camera 30 and a second camera 31, the first camera 30 and the second camera 31 are respectively disposed at two angular positions of the same end of the base plate 10, and a shooting range of the first camera 30 covers a radiation range of the first laser sensor 20; the shooting range of the second camera 31 covers the radiation range of the second laser sensor 21.

Specifically, the first camera 30 corresponds to a scanning range of the first laser sensor 20, and the second camera 31 corresponds to a scanning range of the second laser sensor 21, and uploads data to the background system.

Further, the bottom of the bottom plate 10 is provided with supporting legs 11, the bottom plate 10 is sleeved with a housing 12, and the side surface of the housing 12 is provided with glass windows 120 corresponding to the first laser sensor 20, the second laser sensor 21, the first camera 30 and the second camera 31 one by one.

Specifically, a housing 12 is sleeved on the bottom plate 10, glass windows 120 corresponding to the first laser sensor 20, the second laser sensor 21, the first camera 30 and the second camera 31 one by one are arranged on the side surface of the housing 12, and the first laser sensor 20 and the second laser sensor 21 scan laser through the glass windows 120.

In summary, an embodiment of the present invention provides a wheel inner side distance measuring device, which includes a support, where the support includes a bottom plate and supporting legs disposed at four angular positions of the bottom plate, the bottom plate is provided with a laser sensor and a camera, the laser sensor scans laser to the inner side of a wheel, and an irradiation range of the camera covers a scanning range of the laser sensor. The laser sensor is arranged on the inner side of the rail to scan the inner side of the wheel, so that the data of the inner side of the wheel is obtained, and the accuracy of calculating the inner side distance of the wheel is improved.

Example two:

as shown in fig. 3, a wheel inner side distance measuring system comprises a plurality of wheel inner side distance measuring devices 100, wherein the wheel inner side distance measuring devices 100 are arranged at intervals between two parallel first rails 4 and second rails 5, and the top surfaces of the wheel inner side distance measuring devices 100 are lower than the rails; the first rail 4 is used for driving a left wheel 6, and the second rail 5 is used for driving a right wheel 7;

in a specific embodiment, a plurality of sets of wheel inner side distance measuring devices 100 may be disposed between two parallel rails, the wheel inner side distance measuring devices 100 may be disposed at intervals, for example, four sets may be disposed, and multiple scanning is performed on the same wheel to obtain multiple sets of data, so as to improve the accuracy of measurement.

Still including locating the third laser sensor 8 in the left wheel 6 outside and the fourth laser sensor 9 of locating the right wheel 7 outside, the third laser sensor 8 is swept and is penetrated towards oblique top transmission laser the lateral surface of left wheel 6, the fourth laser sensor 9 is swept and is penetrated towards oblique top transmission laser the lateral surface of right wheel 7.

The controller is further included and is used for ranging according to the wheel inner side distance measurement 100 and data measured by the third laser sensor 8 and the fourth laser sensor 9.

Further, the first laser sensor 20 in the wheel inner side distance measuring device 100 emits laser light obliquely upward to scan the inner side surface of the left wheel 6, and the second laser sensor 21 emits laser light obliquely upward to scan the inner side surface of the right wheel 7.

Specifically, the third laser sensor 8 and the fourth laser sensor 9 are also arranged on the outer side of the track, and the data of the inner side and the outer side of the wheel can be obtained by combining the wheel inner side distance measuring device 100, and are fused into a coordinate system for calculation to obtain the wheel inner side distance.

In summary, an embodiment of the present invention provides a wheel inner side distance measuring system, including a plurality of wheel inner side distance measuring devices, the wheel inner side distance measuring devices being disposed between two parallel first rails and second rails at intervals, and a top surface of the wheel inner side distance measuring device being lower than the first rails and the second rails; the first rail is used for driving a left wheel, and the second rail is used for driving a right wheel; still including locating the third laser sensor in the left wheel outside and the fourth laser sensor who locates the right wheel outside, the third laser sensor sweeps towards oblique top transmission laser the lateral surface of left wheel, the fourth laser sensor sweeps towards oblique top transmission laser the lateral surface of right wheel. The laser sensors are arranged on the inner side and the outer side of the rail to scan the inner side and the outer side of the wheel, so that data of the inner side and the outer side of the wheel are obtained and are fused into a coordinate system for calculation, and the accuracy of calculating the inner side distance of the wheel is improved.

Example three:

as shown in fig. 4 and 5, a method for measuring the inner side distance of a wheel using the inner side distance measuring system of a wheel includes the steps of:

step 101: when a train wheel pair runs, the wheel inner side distance measuring system is excited to work, the left wheel 6 and the right wheel 7 are replaced by two plane plates 14 which are connected together through a connecting rod 13, the length of the connecting rod 13 is L, and the thickness of the plane plate 14 is T;

step 102: the first laser sensor 20 and the third laser sensor 8 respectively scan the inner plane and the outer plane of the plane plate 14; the second laser sensor 21 and the fourth laser sensor 9 respectively scan the inner plane and the outer plane of the other plane plate 14;

step 103: acquiring data of the first laser sensor 20, the second laser sensor 21, the third laser sensor 8 and the fourth laser sensor 9 and calibrating the data into a unified coordinate system, wherein a raw data coordinate system of the first laser sensor 20 is a first coordinate system, a raw data coordinate system of the second laser sensor 21 is a second coordinate system, a raw data coordinate system of the third laser sensor 8 is a third coordinate system, and a raw data coordinate system of the fourth laser sensor 9 is a fourth coordinate system;

step 104: with said third laser sensor 8 outside the left side rail and inside the left side railThe first laser sensor 20 measures two sides of the same plane plate 14, and the coordinate values of the left plane and the right plane are x respectively₁And x₂And calculating the distance between the origin of the first coordinate system and the origin of the third coordinate system by adopting the following formula:

D_l＝x₁+x₂+T；

step 105: when scanning the wheel, the X-axis coordinate of a point obtained by the third laser sensor 8 outside the left side rail is X_oThe calculation method for transferring the X-axis coordinate of the point to the coordinate system of the first laser sensor 20 in the left side rail is X_i＝D_l-x_o，

Step 106: and fusing the acquired original coordinate system data of the third laser sensor 8 and the coordinate coefficient data of the first laser sensor 20 to obtain the inner side distance of the wheel.

And after the X-axis coordinate of the point obtained by the third laser sensor 8 outside the left side rail is transferred to the coordinate system of the first laser sensor 20 inside the left side rail, fusing the obtained original coordinate system data of the third laser sensor 8 with the coordinate system data of the first laser sensor 20.

Further, when measuring the inner side distance of the wheel, the X-axis coordinate obtained when the second laser sensor 21 in the right side rail scans the plane plate 14 is X₃The X-axis coordinate obtained when the first laser sensor 20 in the left side rail scans the inner side surface of the wheel is defined as X_lThe X-axis coordinate obtained when the second laser sensor 21 in the right side rail scans the inner side surface of the wheel is X_rThen, the following formula is used to calculate the wheel inner side distance:

inner wheel distance (x)_l-x₁)+(x_r-x₃)+L。

In summary, the embodiments of the present invention provide a measurement method, in which a laser sensor and a camera are respectively disposed on the inner side and the outer side of a rail, and the obtained data of the inner side and the outer side of a wheel are fused into a coordinate system to be converted to obtain the distance between the inner side and the outer side of the wheel, so as to improve the accuracy of measurement.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.