Device for measuring strain of wheel in rotating state

Abstract

The invention provides a device for measuring the strain of a wheel in a rotating state. The device comprises a measuring strain gauge, a temperature compensation strain gauge and a wire slip ring, the wire slip ring is provided with a fixed end and a rotating end, the rotating end can rotate around the center of the slip ring, the fixed end is provided with a wire outlet, the rotating end is provided with a wire inlet, the wire slip ring is fixed on a tested wheel, and the rotating center of the wire slip ring is coaxial with the rotating center of the tested wheel; the measuring strain gauge is adhered to a to-be-measured position on a measured wheel, the temperature compensation strain gauge is fixed on the measured wheel, and wires of the measuring strain gauge and the temperature compensation strain gauge are electrically connected with a wire of a wire inlet port of the wire slip ring. The purpose of accurately measuring the strain of the measured wheel is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile wheel strain measurement, and in particular relates to a device for measuring strain in a wheel rotating state. Background Art

[0002] Vehicles will inevitably encounter some complex and harsh working conditions during driving. When the vehicle passes through different working conditions, the magnitude of the force applied to each position of the wheel cannot be directly measured. Generally, the magnitude of the strain is measured by pasting a strain gauge at the position to be measured, and then the magnitude of the stress at that position is estimated. However, the wheel rotates during the vehicle's movement, so it is difficult to measure the strain of the wheel in a rotating state. Often, the strain magnitude under dynamic working conditions can only be inferred by measuring the static wheel. In addition, the wheel temperature changes with the ambient temperature. The changing temperature will affect the strain gauge, making the measurement inaccurate. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a device for measuring strain under a rotating wheel state, which at least partially solves the problem of inaccurate measurement existing in the prior art.

[0004] The embodiment of the present invention provides a device for measuring strain in a rotating wheel state, comprising: a measuring strain gauge, a temperature compensation strain gauge and a conductor slip ring;

[0005] The conductor slip ring has a fixed end and a rotating end, the rotating end can rotate around the center of the slip ring, the fixed end has a wire outlet, and the rotating end has a wire inlet. The conductor slip ring is fixed on the wheel to be measured, and the rotation center of the conductor slip ring is coaxial with the rotation center of the wheel to be measured;

[0006] The measuring strain gauge is pasted on the position to be measured on the measured wheel, the temperature compensation strain gauge is fixed on the measured wheel, and the wires of the measuring strain gauge and the temperature compensation strain gauge are electrically connected to the wires of the wire slip ring inlet port.

[0007] Optionally, it also includes a slip ring fixing plate and a slip ring base, the rotating end of the wire slip ring is connected to the slip ring base, the slip ring base is fixed on the wheel to be measured, and the slip ring fixing plate is connected to the fixed end of the wire slip ring.

[0008] Optionally, one end of the slip ring fixing plate is connected to the fixed end of the wire slip ring, and the other end of the slip ring fixing plate is connected to the vehicle body. The other end of the slip ring fixing plate passes through a hole fixed in advance on the vehicle body, and the slip ring fixing plate slides up and down in the hole.

[0009] Optionally, one end of the slip ring fixing plate is connected to the fixed end of the conductor slip ring, and the other end of the slip ring fixing plate is rigidly connected to the chassis structure.

[0010] Optionally, a buffer substrate is further included, the bottom of the buffer substrate is pasted on the wheel to be tested, and the temperature compensation strain gauge is pasted on the surface of the buffer substrate.

[0011] Optionally, the material of the buffer base is the same as that of the wheel being tested.

[0012] Optionally, the thickness of the buffer substrate is greater than 3 mm.

[0013] Optionally, the buffer base and the tested wheel are adhered to each other via an adhesive, and the adhesive is a flexible adhesive.

[0014] Optionally, a strain collector is also included, and the wire of the strain collector is electrically connected to the wire of the outlet port of the wire slip ring.

[0015] Optionally, a half-bridge connection method of a Wheatstone bridge is adopted between the measuring strain gauge and the temperature compensation strain gauge and the wire of the wire slip ring inlet port.

[0016] The device for measuring strain in a rotating wheel state provided by the present invention can measure the strain value of the rotating wheel online and in real time by setting a measuring strain gauge and a temperature compensation strain gauge. The influence of the ambient temperature is reduced by setting the temperature compensation strain gauge, and the wire slip ring can ensure that the wires are not entangled when the measured wheel of the vehicle rotates, thereby ensuring accurate transmission of the signal, thereby achieving the purpose of accurately measuring the strain size of the measured wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0018] Figure 1 It is a schematic structural diagram of a device for measuring strain under a wheel rotation state disclosed in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0020] Figure 3 It is a schematic diagram of the structure of a conductor slip ring disclosed in an embodiment of the present invention;

[0021] Among them, 1-slip ring fixing plate, 2-strain collector, 3-conductor slip ring, 301-line outlet, 302-line inlet, 4-buffer base, 5-temperature compensation strain gauge, 6-measurement strain gauge, 7-slip ring base, 8-measured wheel. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] It should be clear that the following embodiments of the present invention are described by specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention.

[0024] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. It should be understood by those skilled in the art based on the invention that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0025] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0026] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0027] For ease of understanding, Figure 1 and Figure 2 As shown, this embodiment discloses a device for measuring strain under a rotating wheel state, including: a measuring strain gauge, a temperature compensation strain gauge and a conductor slip ring;

[0028] like Figure 3As shown, the conductor slip ring has a fixed end and a rotating end, the rotating end can rotate around the center of the slip ring, the fixed end has a wire outlet, and the rotating end has a wire inlet. The conductor slip ring is fixed on the wheel to be measured, and the rotation center of the conductor slip ring is coaxial with the rotation center of the wheel to be measured;

[0029] The measuring strain gauge is pasted on the position to be measured on the measured wheel, the temperature compensation strain gauge is fixed on the measured wheel, and the wires of the measuring strain gauge and the temperature compensation strain gauge are electrically connected to the wires of the wire slip ring inlet port.

[0030] Optionally, it also includes a slip ring fixing plate and a slip ring base, the rotating end of the wire slip ring is connected to the slip ring base, the slip ring base is fixed on the wheel to be measured, and the slip ring fixing plate is connected to the fixed end of the wire slip ring.

[0031] Optionally, one end of the slip ring fixing plate is connected to the fixed end of the wire slip ring, and the other end of the slip ring fixing plate is connected to the vehicle body. The other end of the slip ring fixing plate passes through a hole fixed in advance on the vehicle body, and the slip ring fixing plate slides up and down in the hole.

[0032] Optionally, one end of the slip ring fixing plate is connected to the fixed end of the conductor slip ring, and the other end of the slip ring fixing plate is rigidly connected to the chassis structure.

[0033] Optionally, a buffer substrate is further included, the bottom of the buffer substrate is pasted on the wheel to be tested, and the temperature compensation strain gauge is pasted on the surface of the buffer substrate.

[0034] Optionally, the material of the buffer base is the same as that of the wheel being tested.

[0035] Optionally, the thickness of the buffer substrate is greater than 3 mm.

[0036] Optionally, the buffer base and the tested wheel are adhered to each other via an adhesive, and the adhesive is a flexible adhesive.

[0037] Optionally, a strain collector is also included, and the wire of the strain collector is electrically connected to the wire of the outlet port of the wire slip ring.

[0038] Optionally, a half-bridge connection method of a Wheatstone bridge is adopted between the measuring strain gauge and the temperature compensation strain gauge and the wire of the wire slip ring inlet port.

[0039] In a specific application scenario, the buffer base is pasted near the area to be measured, the temperature compensation strain gauge is pasted on the surface of the buffer base, the slip ring base is fixed on the wheel bolt, the wire slip ring is fixed on the slip ring base, the rotation center of the wire slip ring is coaxial with the rotation center of the wheel, one end of the slip ring fixing plate is connected to the fixed end of the wire slip ring, and the other end is fixed to the vehicle body or chassis, and can jump simultaneously with the wheel.

[0040] The measuring strain gauge and the temperature compensation strain gauge are strain gauges of the same model, and the half-bridge connection method of Wheatstone bridge is adopted for wiring.

[0041] The conductor slip ring and the slip ring base are rigidly connected by bolts, and the rotation centers of the two are coaxial. The slip ring base has two structures, corresponding to the wheel bolt locking and wheel nut locking. When the wheel is bolt locked, the slip ring base is connected to the wheel by installing bolts of corresponding number and specifications; when the wheel is nut locked, the slip ring base is connected to the wheel by installing nuts of corresponding number and specifications.

[0042] The slip ring fixing plate can slide up and down through the hole fixed in advance on the vehicle body to limit the front, back, left and right freedom of the slip ring fixing plate, or it can be rigidly connected to the chassis structure (such as steering knuckle) to achieve complete constraint.

[0043] Strain gauges can measure quarter-bridge, half-bridge or full-bridge strains.

[0044] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. must be possessed by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and facilitation of understanding, rather than limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0045] In the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. The block diagrams of the devices, devices, equipment, and systems involved in the present invention are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0046] Additionally, as used herein, "or" used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the example described is preferred or better than other examples.

[0047] It should also be noted that in the system and method of the present invention, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present invention.

[0048] Various changes, substitutions, and modifications of the techniques described herein may be made without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of the present invention is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and actions described above. Currently existing or later to be developed processes, machines, manufactures, compositions of events, means, methods, or actions that perform substantially the same functions or achieve substantially the same results as the corresponding aspects described herein may be utilized. Thus, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or actions within their scope.

[0049] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0050] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A device for measuring strain in a rotating wheel, characterized in that: include: Measuring strain gauges, temperature compensation strain gauges and conductor slip rings; The conductor slip ring has a fixed end and a rotating end, the rotating end can rotate around the center of the slip ring, the fixed end has a wire outlet, and the rotating end has a wire inlet. The conductor slip ring is fixed on the wheel to be measured, and the rotation center of the conductor slip ring is coaxial with the rotation center of the wheel to be measured; The measuring strain gauge is attached to the position to be measured on the wheel being measured, the temperature compensating strain gauge is fixed on the wheel being measured, and the wires of the measuring strain gauge and the temperature compensating strain gauge are electrically connected to the wires of the wire slip ring inlet port.

2. The device for measuring strain in a rotating wheel state according to claim 1, characterized in that: It also includes a slip ring fixing plate and a slip ring base. The rotating end of the wire slip ring is connected to the slip ring base. The slip ring base is fixed on the wheel to be tested. The slip ring fixing plate is connected to the fixed end of the wire slip ring.

3. The device for measuring strain in a rotating wheel state according to claim 2, characterized in that: One end of the slip ring fixing plate is connected to the fixed end of the wire slip ring, and the other end of the slip ring fixing plate is connected to the vehicle body. The other end of the slip ring fixing plate passes through a hole fixed in advance on the vehicle body, and the slip ring fixing plate slides up and down in the hole.

4. The device for measuring strain in a rotating wheel state according to claim 2, characterized in that: One end of the slip ring fixing plate is connected to the fixed end of the conductor slip ring, and the other end of the slip ring fixing plate is rigidly connected to the chassis structure.

5. The device for measuring strain in a rotating wheel state according to claim 1, characterized in that: It also includes a buffer base, the bottom of the buffer base is pasted on the wheel to be tested, and the temperature compensation strain gauge is pasted on the surface of the buffer base.

6. The device for measuring strain in a rotating wheel state according to claim 5, characterized in that: The material of the buffer base is the same as that of the tested wheel.

7. The device for measuring strain in a rotating wheel state according to claim 5, characterized in that: The thickness of the buffer substrate is greater than 3 mm.

8. The device for measuring strain in a rotating wheel state according to claim 5, characterized in that: The buffer base is adhered to the wheel to be tested by an adhesive, and the adhesive is a flexible adhesive.

9. The device for measuring strain in a rotating wheel state according to claim 1, characterized in that: It also includes a strain collector, the wire of the strain collector is electrically connected to the wire of the outlet port of the wire slip ring.

10. The device for measuring strain in a rotating wheel state according to claim 1, characterized in that: The measuring strain gauge and the temperature compensation strain gauge are connected to the wires of the wire slip ring inlet port using a half-bridge connection method of a Wheatstone bridge.

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