An indirect wheel-rail measurement device

Abstract

The present invention discloses a wheel-rail indirect measurement device, which belongs to the field of track measurement. It comprises a first fixed fixture arranged at the fixed end of a rotating arm, a second fixed fixture arranged on a frame and located above the first fixed fixture, a third fixed fixture arranged at the rotating end of the rotating arm, an acceleration sensor arranged on the first fixed fixture, a magnetostrictive sensor arranged on the second fixed fixture, and an eddy current sensor arranged on the third fixed fixture. The magnetostrictive sensor is arranged perpendicular to the horizontal plane and its measuring end is movably connected to the axle box. The turbine sensor is arranged parallel to the horizontal plane and its measuring end is movably connected to the frame. The present invention can indirectly obtain indicator parameters of vehicle safe operation such as wheel-rail interaction force and derailment coefficient, while avoiding the safety risks of drilling holes in the wheelset, and can dynamically monitor passenger cars in any environment.

Description

Technical Field

[0001] The present invention relates to the field of track measurement, and in particular to a wheel-rail indirect measurement device. Background Art

[0002] Wheel-rail force is an important evaluation indicator for the safe operation of a vehicle. Researchers can use wheel-rail force to evaluate the vehicle's rollover coefficient, wheel weight reduction, etc. The measurement method of wheel-rail force has evolved from intermittent to continuous, and from contactless power supply and signal transmission to non-destructive testing. Its main technical difficulty is that it is difficult to meet the needs of long-term continuous operation and continuous force measurement, and it has limitations on its applicability to elastic wheels and low-floor wheels. Existing force-measuring wheelsets require drilling holes in the spoke plates to arrange sensors, which poses a safety hazard for high-speed passenger cars. The force-measuring rail technology is mainly used to monitor wheel-rail forces at specific locations on the line, and can identify defects on the wheel surface, but it has obvious limitations. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention proposes a wheel-rail indirect measurement device, and the specific technical solution is as follows:

[0004] A wheel-rail indirect measurement device includes a first fixing fixture arranged at the fixed end of a rotating arm, a second fixing fixture arranged on a frame and located above the first fixing fixture, a third fixing fixture arranged at the rotating end of the rotating arm, an acceleration sensor arranged on the first fixing fixture, a magnetostrictive sensor arranged on the second fixing fixture, and an eddy current sensor arranged on the third fixing fixture, wherein the magnetostrictive sensor is arranged perpendicular to the horizontal plane and its measuring end is movably connected to the axle box, and the turbine sensor is arranged parallel to the horizontal plane and its measuring end is movably connected to the frame.

[0005] Preferably, the first fixing fixture includes a plurality of groups of fixing lugs arranged on the fixed end of the rotating arm and a main frame arranged between the fixing lugs, and the acceleration sensor is arranged on the main frame.

[0006] Preferably, the fixing lug is provided with a fixing hole that cooperates with the swing arm fixing bolt, and the swing arm fixing bolt is used to fix the fixed end of the swing arm on the axle box.

[0007] Preferably, a magnetostrictive ring is provided on the main frame to cooperate with the measuring end of the magnetostrictive sensor, and the measuring end of the magnetostrictive sensor passes through the magnetostrictive ring and is movably connected to the axle box.

[0008] Preferably, the number of the fixed hanging ears is 2 to 4.

[0009] Preferably, the second fixing fixture includes an arc-shaped fixing plate arranged on the frame and a mounting frame arranged on the arc-shaped fixing plate.

[0010] Preferably, the mounting frame is provided with a plurality of fixing screws, which pass through the mounting frame and the arc-shaped fixing plate in sequence and are threadedly connected to the frame.

[0011] Preferably, the mounting bracket is provided with a mounting hole threadedly connected to the magnetostrictive sensor.

[0012] Preferably, the third fixing fixture includes a fixing plate arranged on the rotating end of the rotating arm and a fixing bracket arranged on the fixing plate, and the eddy current sensor is arranged on the fixing bracket.

[0013] The present invention has the following beneficial effects:

[0014] The present invention measures the swing arm and frame during the operation of the vehicle system by respectively installing an acceleration sensor on the first fixed fixture, a magnetostrictive sensor on the second fixed fixture, and an eddy current sensor on the third fixed fixture. The acceleration sensor is used to measure the axial acceleration, the magnetostrictive sensor is used to measure the vertical displacement of the frame relative to the axle box, and the eddy current sensor is used to measure the lateral displacement of the frame relative to the swing arm. Then, through mathematical calculations, the index parameters of the vehicle's safe operation, such as the wheel-rail interaction force and the derailment coefficient, are obtained. At the same time, the present invention avoids the safety risks of drilling holes in the wheelset by installing the measurement sensors on the first fixed fixture, the second fixed fixture, and the third fixed fixture, and can dynamically monitor passenger cars in any environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0017] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0018] Figure 4 for Figure 1 A partial enlarged view of point C in the middle. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0020] Example

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0025] See also Figures 1 to 4 The present invention includes a first fixture 1 disposed at the end of the wheel arm 8 fixed to the axle box 10, i.e., the fixed end of the arm 8; a second fixture 2 disposed on the frame 9 above the first fixture 1; and a third fixture 3 disposed at the rotating end of the arm 8. By mounting measurement sensors on the first fixture 1, the second fixture 2, and the third fixture 3, the present invention avoids the safety risks of drilling holes in the wheelset and enables dynamic monitoring of passenger buses in any environment.

[0026] See also Figures 1 to 2 The first fixing fixture 1 is provided with an acceleration sensor 4, which is used to measure the axial acceleration of the vehicle body. The first fixing fixture 1 includes two fixing lugs 11 provided on the fixed end of the swing arm 8 and a main frame 12 provided between the two sets of fixing lugs 11. The acceleration sensor 4 is provided on the side of the main frame 12 and measures the acceleration of the axle box 10 and the vehicle body during operation. The fixing lug 11 is provided with a fixing hole 111 that cooperates with the fixing bolt of the swing arm 8. The fixing bolt of the swing arm 8 is used to fix the fixed end of the swing arm 8 to the axle box 10. The present invention provides a fixing hole 111 on the fixing lug 11 and cooperates with the fixing bolt of the swing arm 8, so that the first fixing fixture 1 does not need to be drilled separately during the assembly and fixing process. The tester can install the fixing lug 11 on the surface of the fixed end of the swing arm 8. The fixing bolt of the swing arm 8 passes through the fixing lug 11 and the swing arm 8 in sequence and simultaneously fixes the fixing lug 11 and the swing arm 8 to the axle box 10, thereby reducing the safety risk of drilling holes in the wheelset by the first fixing fixture 1.

[0027] See also Figures 1 to 3 The second fixture 2 is equipped with a magnetostrictive sensor 5 for measuring displacement. The magnetostrictive sensor 5 is positioned perpendicular to the horizontal plane, and its measuring end is movably connected to the axle box 10. The magnetostrictive sensor 5 is used to measure the vertical displacement of the frame 9 relative to the axle box 10. The second fixture 2 includes a curved fixing plate 21 mounted on the frame 9 and a mounting bracket 22 positioned outside the curved fixing plate 21. The curvature of the curved fixing plate 21 matches the curvature of the frame 9 at its mounting position on the frame 9, thereby ensuring the stability of the second fixture 2 during installation and vehicle operation, as well as the measurement accuracy of the magnetostrictive sensor 5. The mounting bracket 22 has a mounting hole 222 threadedly connected to the magnetostrictive sensor 5. Testers can secure the magnetostrictive sensor 5 to the mounting bracket 22 by inserting the threaded end of the magnetostrictive sensor 5 into the mounting hole 222 and tightening it.

[0028] See also Figures 2 to 3 The main frame 12 of the first fixing fixture 1 is also provided with a magnetostrictive ring 121 that cooperates with the measuring end of the magnetostrictive sensor 5. The measuring end of the magnetostrictive sensor 5 passes through the magnetostrictive ring 121 and is movably connected to the axle box 10. The magnetostrictive ring 121 is used to position the measuring end of the magnetostrictive sensor 5 to prevent the magnetostrictive sensor 5 from being affected by the vibration of the vehicle body during the measurement process, thereby reducing the measurement accuracy. Four fixing screws 221 are provided on the mounting frame 22. The fixing screws 221 pass through the mounting frame 22 and the arc-shaped fixing plate 21 in sequence and are threadedly connected to the frame 9. The present invention fixes the mounting frame 22 and the arc-shaped fixing plate 21 on the frame 9 at the same time by having the fixing screws 221 pass through the mounting frame 22 and the arc-shaped fixing plate 21 in sequence and be threadedly connected to the frame 9, thereby reducing the safety risks caused by the fixing thread drilling and thread drilling.

[0029] See also Figure 1 and Figure 4 The third fixed fixture 3 is provided with an eddy current sensor 6 for measuring displacement. The eddy current sensor 6 is arranged parallel to the horizontal plane and its measuring end is movably connected to the frame 9. The eddy current sensor 6 is used to measure the lateral displacement of the frame 9 relative to the rotating arm 8. The third fixed fixture 3 includes a fixed plate 31 arranged on the rotating end of the rotating arm 8 and a fixed bracket 32 arranged on the fixed plate 31. The eddy current sensor 6 is arranged on the fixed bracket 32 with the measuring end of the eddy current sensor 6 facing the frame 9. The tester can adjust the installation position of the fixed bracket 32 on the fixed plate 31, and then adjust the distance between the measuring end of the eddy current sensor 6 and the frame 9 to be tested, thereby improving the measurement range and measurement accuracy of the eddy current sensor 6 in the present invention.

[0030] See also Figures 1 to 4The present invention measures the swing arm 8 and the frame 9 during the operation of the vehicle system by respectively installing an acceleration sensor 4 on the first fixed fixture 1, a magnetostrictive sensor 5 on the second fixed fixture 2, and an eddy current sensor 6 on the third fixed fixture 3. The acceleration sensor 4 is used to measure the axial acceleration, the magnetostrictive sensor 5 is used to measure the vertical displacement of the frame 9 relative to the axle box 10, and the eddy current sensor 6 is used to measure the lateral displacement of the frame 9 relative to the swing arm 8. Then, through mathematical calculations, the index parameters of the vehicle's safe operation, such as the wheel-rail interaction force and the derailment coefficient, are obtained. At the same time, the present invention avoids the safety risk of drilling holes in the wheelset by installing the measuring sensors on the first fixed fixture 1, the second fixed fixture 2, and the third fixed fixture 3, and can dynamically monitor passenger cars in any environment.

[0031] It should be noted that, in this document, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of further limitations, the elements defined by the phrase "includes..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wheel-rail indirect measuring device, characterized in that: The invention comprises a first fixing fixture (1) arranged at the fixed end of the rotating arm, a second fixing fixture (2) arranged on the frame and located above the first fixing fixture (1), a third fixing fixture (3) arranged at the rotating end of the rotating arm, an acceleration sensor (4) arranged on the first fixing fixture (1), a magnetostrictive sensor (5) arranged on the second fixing fixture (2), and an eddy current sensor (6) arranged on the third fixing fixture (3), wherein the magnetostrictive sensor (5) is arranged perpendicular to the horizontal plane and a measuring end thereof is movably connected to the axle box, and the eddy current sensor (6) is arranged parallel to the horizontal plane and a measuring end thereof is movably connected to the frame; The first fixing tool (1) comprises a plurality of groups of fixing lugs (11) arranged on the fixed end of the rotating arm and a main frame (12) arranged between the fixing lugs (11), and the acceleration sensor (4) is arranged on the main frame (12); The second fixing tool (2) comprises an arc-shaped fixing plate (21) arranged on the frame and a mounting frame (22) arranged on the arc-shaped fixing plate (21); The third fixing fixture (3) comprises a fixing plate (31) arranged on the rotating end of the rotating arm and a fixing bracket (32) arranged on the fixing plate (31), and the eddy current sensor (6) is arranged on the fixing bracket (32); The main frame (12) is provided with a magnetostrictive ring (121) that cooperates with the measuring end of the magnetostrictive sensor (5); the measuring end of the magnetostrictive sensor (5) passes through the magnetostrictive ring (121) and is movably connected to the axle box.

2. The wheel-rail indirect measuring device according to claim 1, characterized in that: The fixing lug (11) is provided with a fixing hole (111) matched with a rotating arm fixing bolt, and the rotating arm fixing bolt is used to fix the rotating arm fixing end on the axle box.

3. The wheel-rail indirect measuring device according to claim 1, characterized in that: The number of the fixed hanging ears (11) is 2 to 4.

4. The wheel-rail indirect measuring device according to claim 1, characterized in that: The mounting frame (22) is provided with a plurality of fixing screws (221), and the fixing screws (221) sequentially pass through the mounting frame (22) and the arc-shaped fixing plate (21) and are threadedly connected to the frame.

5. The wheel-rail indirect measuring device according to claim 1, characterized in that: The mounting frame (22) is provided with a mounting hole (222) threadedly connected to the magnetostrictive sensor (5).

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