CN216805016U - Wheel with load data acquisition device and automobile with wheel - Google Patents
Wheel with load data acquisition device and automobile with wheel Download PDFInfo
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- CN216805016U CN216805016U CN202220131299.4U CN202220131299U CN216805016U CN 216805016 U CN216805016 U CN 216805016U CN 202220131299 U CN202220131299 U CN 202220131299U CN 216805016 U CN216805016 U CN 216805016U
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Abstract
The utility model relates to a be furnished with load data acquisition device's wheel and the car of being equipped with this wheel, the wheel includes wheel hub and the foil gage data collection station who sets up on this wheel hub, foil gage data collection station's foil gage unit paste in wheel hub's rim peripheral surface to be located rim peripheral surface and go up along the position placed in the middle of wheel axial direction, the foil gage unit disposes the protective member who fixes at rim peripheral surface relevant position. The wheel provided with the load data acquisition device can acquire multi-directional strain force, has a simple acquisition circuit structure at the periphery of the strain gauge, has the advantages of accurate data acquisition, sensitivity to micro deformation and the like, and has stronger adaptability to high-temperature and high-pressure driving environments, thereby having flexible and wide application scenes.
Description
Technical Field
The present invention relates to the field of vehicle operation data or performance data acquisition, and in particular to a wheel equipped with a load data acquisition device and an automobile equipped with the wheel.
Background
With the continuous progress of science and technology and the rapid development of economy, more and more occasions needing data acquisition exist in life and work, and especially in some environments with complex applications, the requirement on data acquisition is higher and higher.
In recent years, the widespread use of data acquisition devices has greatly promoted the development of smart vehicles, and the demand for vehicle components equipped with data acquisition devices has been increasing, and the demand for such components has also been increasing. For example, in the running process of a vehicle, the data acquisition device is often used in a complex environment, and is stressed by an external force to cause damage to the strain gauge, and meanwhile, along with the use environment of high temperature and high pressure, the accurate measurement of the data acquisition device is also challenged.
At present, vehicle equipment provided with a data acquisition device usually adopts a straight foil strain gauge, and has the defects of missed acquisition of some tiny data, easy influence of environment, suitability for testing strain force in a single direction, easy drift and the like. Therefore, there is an urgent need for better alternatives to solve this series of problems.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to propose a wheel equipped with a load data acquisition device in order to at least partially overcome the drawbacks of the prior art.
In one aspect, the utility model provides a wheel equipped with a load data acquisition device, which comprises a wheel hub and a strain gauge data acquisition unit arranged on the wheel hub, wherein a strain gauge unit of the strain gauge data acquisition unit is attached to the outer peripheral surface of a rim of the wheel hub and is positioned at a central position on the outer peripheral surface of the rim along the axial direction of the wheel, and the strain gauge unit is provided with a protective component fixed at a corresponding position on the outer peripheral surface of the rim. The strain gauge data acquisition unit is a load data acquisition device.
Advantageously, the so-called strain gage data collector is located centrally on the outer peripheral surface of the rim in the axial direction of the wheel, i.e. away from the two end-face rims of the hub, or from the bead seats, without significant stress concentrations or sudden changes.
According to one embodiment of the utility model, the strain gage unit is configured as a full bridge strain gage.
Further, the full-bridge strain gauge is composed of a resistance strain gauge with the resistance value of 300 ohms.
Advantageously, a plurality of said strain gauge elements are distributed along the circumference of the hub.
Further, the guard member includes a gasket disposed between the strain gauge unit and the outer peripheral surface of the rim. The liner shields the strain gage from the air pressure.
According to one embodiment of the present invention, the upper and lower surfaces of the gasket are adhesively fixed to the strain gage element and the outer peripheral surface of the rim, respectively, by an adhesive. The adhesive is a special adhesive capable of accurately transferring the strain of the hub, so that the barrier caused by accurate induction of the deformation of the hub by the strain gauge is avoided.
Further, the gasket is a sheet made of a metal material or a nonmetal material, and the linear expansion coefficient of the metal material or the nonmetal material sheet is 0-50% different from the linear expansion coefficient of the sensitive grid of the strain gauge unit, and/or the elastic modulus of the metal material or the nonmetal material sheet is 0-50% different from the elastic modulus of the sensitive grid of the strain gauge unit.
Suitably, the sheet plates herein function to accurately transmit the strain generated by the hub/rim under load, while at the same time there is no or only little deformation relative to the sensitive grids of the strain gauge (under temperature or other environmental loads), so that no or only little additional resistance change occurs, reducing unnecessary interference, and thus making the measurement result of the strain gauge data collector more accurate and controllable.
Further, the gasket is a sheet made of 2440 aluminum alloy.
Preferably, the thickness of the plate is 0.5-5 mm.
According to an embodiment of the present invention, the guard member includes a shield fixed to the outer peripheral surface of the rim, the shield forming a sealed closed space with the outer peripheral surface of the rim, the strain gauge unit being accommodated in the closed space with being attached to the outer peripheral surface of the rim. The design structure provides a certain thermal insulation and pressure insulation measuring environment for the strain gauge unit (particularly a sensitive grid thereof) so as to shield or reduce the influence of air pressure on a strain gauge data acquisition unit.
Further, the strain gauge data collector further comprises: the amplification assembly is connected to the acquisition signal output side of the strain gauge unit and is electrically connected with the strain gauge in a differential mode, and the amplification assembly is used for amplifying the acquisition signal and outputting an amplification signal; the conversion assembly is connected to the output side of the amplification assembly, and the amplified signal is processed by the conversion assembly to form a digital signal; and the sending component is connected to the output side of the conversion component, and the digital signal is sent out by the sending component.
Further, the strain gauge data collector is configured to: the collected signals are made to form a differential voltage signal of 10-40 muV. By combining a large amount of experimental data, the differential voltage signal acquired by the strain gauge data acquisition unit is a practical useful signal when the differential voltage signal is within the range of 10-40 mu V in the field of intelligent vehicles.
Still further, the strain gage data collector is configured to: and the amplification factor of the amplification component to the differential voltage signal is 1000 times.
In another aspect, the utility model provides a motor vehicle equipped with at least one wheel equipped with a load data acquisition device as described above.
The utility model provides a wheel with a load data acquisition device and an automobile with the wheel, wherein the wheel with the load data acquisition device can acquire multidirectional strain force, and an acquisition circuit at the periphery of a strain gauge is simple in structure, has the advantages of accurate data acquisition, sensitivity to tiny deformation and the like, and has stronger adaptability to high-temperature and high-pressure driving environments, so that the wheel has flexible and wide application scenes.
The features and advantages of the wheel provided with a load data acquisition device according to the first aspect of the utility model are equally applicable to the vehicle according to the second aspect of the utility model. The wheel with the load data acquisition device and the automobile with the wheel show excellent performance in real-time data acquisition, and provide a better solution for customers.
Drawings
In which exemplary embodiments of the utility model are shown. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive. It is also noted that for purposes of clarity of illustration, certain features are not necessarily drawn to scale in the drawings.
FIG. 1 is a schematic cross-sectional view of a wheel equipped with a load data acquisition device according to one embodiment of the present invention;
FIG. 2 is an exemplary diagram of wheel forces in accordance with one embodiment of the present invention;
FIG. 3 is a schematic diagram of a strain gage data collector in accordance with one embodiment of the utility model;
FIG. 4 is a schematic diagram of a strain gage data collector in accordance with another embodiment of the utility model;
FIG. 5 is a schematic diagram of an internal structure of a strain gage data collector according to an embodiment of the utility model;
FIG. 6 is an internal structural view of a full bridge strain gage in accordance with one embodiment of the utility model;
FIG. 7 is a graph of data acquisition for a 300 Ω strain gage, according to one embodiment of the present invention;
FIG. 8 is a graph of data acquisition for a 1k Ω strain gage, in accordance with one embodiment of the present invention;
FIG. 9 is a graph of a wheel hub slice pad data acquisition according to one embodiment of the present invention;
FIG. 10 is a graph of a 2440 aluminum alloy liner data collection according to one embodiment of the utility model.
Detailed Description
The following description is provided to illustrate the technical solutions of the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The principles of the utility model, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model. Also, it is noted that a feature, structure, or characteristic described herein in connection with one embodiment is not necessarily limited to the particular embodiment, nor is it intended to be mutually exclusive of other embodiments, as those skilled in the art will recognize various combinations of features of different embodiments as may be contemplated within the scope of the appended claims.
In the specification, the terms "including"/"comprising" and "having," and any variant thereof, are intended to cover non-exclusive inclusions. For example, a process, method, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. In the description of the present application, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, and do not mean that the corresponding devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus the terms should not be construed as limiting the present invention. In addition, the terms "a" and "an" should be interpreted as "at least one" or "one or more," i.e., the number of an element can be one in one embodiment and the number of the element can be plural in another embodiment, i.e., the terms "a" and "an" should not be interpreted as limiting the number.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art and may be specifically interpreted based on their context within the context of the description of the relevant art.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic cross-sectional view of a wheel equipped with a load data acquisition device according to an embodiment of the present invention. The utility model provides a wheel with a load data acquisition device, which comprises a hub and a strain gauge data acquisition unit arranged on the hub, wherein a strain gauge unit of the strain gauge data acquisition unit is attached to the outer peripheral surface of a rim of the hub and is positioned at a central position on the outer peripheral surface of the rim along the axial direction of the wheel, and the strain gauge unit is provided with a protective component fixed at the corresponding position on the outer peripheral surface of the rim. The strain gauge data acquisition unit is a load data acquisition device.
Advantageously, the so-called strain gage data collector is located centrally on the outer peripheral surface of the rim in the axial direction of the wheel, i.e. away from the two end-face rims of the hub, or from the bead seats, without significant stress concentrations or sudden changes. The load data acquisition device is located at the wheel at a position shown at P in fig. 1.
According to one embodiment of the utility model, the working principle of the strain gauge data acquisition unit is as follows: when a vehicle has a certain load, the vehicle hub can deform to a certain degree, when the vehicle is static, the deformation is in direct proportion to the load, the deformation can be acquired by a strain gauge data acquisition unit arranged on the hub, and particularly when the deformation ratio is small, the deformation can be sensitively captured by the strain gauge data acquisition unit; however, when the vehicle is running, the running environment of the hub is complex and may change at any time, and besides the vibration of the hub caused by the flatness of the road surface, the change of the air pressure and the temperature in the running process of the hub has different influences on the data of the hub. The strain gauge data acquisition unit provided by the utility model also provides solutions for the problems.
According to one embodiment of the utility model, due to the structural characteristics of the hub, the deformation conditions of the hub at different positions are different, the conditions of small middle change and large change of two ends occur, meanwhile, because the angle change of two ends of the hub is large and is easily stressed by external force, if the strain gauge is arranged, the strain gauge is easily damaged, and thus the accuracy of the acquired data is influenced. Therefore, in order to obtain more accurate data through sampling, the strain gauge data collector is installed in the middle gentle area of the hub.
FIG. 2 is an exemplary diagram of wheel forces according to one embodiment of the present invention. According to the stress conditions of different parts of the wheel during operation, the stress conditions are represented from black to white from small to large, and at least one strain gauge data collector is arranged on the circumference of a position L with the deepest color, which is positioned on the outer peripheral surface of a rim and is centered along the axial direction of the wheel. When a plurality of strain gauge data collectors are arranged at the same time, the strain gauge data collectors can be arranged at the symmetrical positions of the circumference of the same hub and used for collecting data of a single hub, or a plurality of strain gauges are respectively arranged on different hubs and used for collecting data of the same hub.
Fig. 3 is a schematic view of a strain gage data collector according to an embodiment of the utility model, the guard member including a gasket disposed between the strain gage element and the outer peripheral surface of the rim.
According to one embodiment of the utility model, the gasket is arranged between the strain gauge and the hub in the strain gauge data acquisition unit, and the influence of air pressure on the strain gauge during data acquisition is effectively shielded by the gasket. The strain gauge and the liner are fixed through the adhesive arranged between the strain gauge and the liner, so that errors brought to data acquisition due to relative position changes in movement are prevented.
According to one embodiment of the present invention, the upper and lower surfaces of the gasket are adhesively fixed to the strain gage element and the outer peripheral surface of the rim, respectively, by an adhesive. The adhesive is a special adhesive capable of accurately transferring the strain of the hub, so that the barrier caused by accurate induction of the deformation of the hub by the strain gauge is avoided.
According to an embodiment of the utility model, the gasket is a sheet made of a metallic material or a non-metallic material having a coefficient of linear expansion that differs by 0-50% (preferably, substantially no difference therebetween, or less than 10%) compared to the coefficient of linear expansion of the sensitive grid of the strain gauge unit, and/or a modulus of elasticity that differs by 0-50% (preferably, substantially no difference therebetween, or less than 10%) compared to the modulus of elasticity of the sensitive grid of the strain gauge unit.
The function of the plate sheet is to accurately transmit the strain generated by the hub/rim under the load, and meanwhile, no or only little deformation is generated relative to the sensitive grid (under the temperature or other environmental loads) of the strain gauge, so that no or only little additional resistance change is generated, unnecessary interference is reduced, and the measurement result of the strain gauge data collector is more accurate and controllable.
Fig. 4 is a schematic view of a strain gage data collector according to another embodiment of the present invention, the guard member including a shield fixed to an outer peripheral surface of a rim, the shield forming a sealed closed space with the outer peripheral surface of the rim, the strain gage unit being received in the closed space while being attached to the outer peripheral surface of the rim. The design structure provides a certain thermal insulation and pressure insulation measuring environment for the strain gauge unit (particularly a sensitive grid thereof) so as to shield or reduce the influence of air pressure on a strain gauge data acquisition unit.
Fig. 5 is a schematic diagram of an internal structure of a strain gauge data collector according to an embodiment of the utility model. The strain gauge data collector comprises: the strain gauge 1 is used for extracting external signals and outputting acquisition signals; the amplifying assembly 2 is connected to the output side of the strain gauge 1 and is electrically connected with the strain gauge in a differential mode, and the amplifying assembly 2 is used for amplifying the acquired signal and outputting an amplified signal; the conversion component 3 is connected to the output side of the amplification component, and the amplified signal is processed by the conversion component to form a digital signal; and a transmitting component 4, connected to the output side of the converting component, through which the digital signal is transmitted. In the strain gauge data acquisition device, the amplification assembly has a function of acquiring the acquisition signal of a specific range.
In the embodiment shown in fig. 5, the collected signal collected by the strain gauge 1 is a differential voltage signal. Based on the working principle of differential signals, the differential voltage signals are used, so that not only can tiny signals be easily detected, the sensitivity of the strain gauge data acquisition unit be improved, but also the interference of an external electromagnetic field, noise interference, jitter interference and the like can be effectively resisted.
Furthermore, the strain gage data acquisition unit is widely applied to different systems and industries, and can realize the detection of signals in a specific range by selecting the strain gage 1 and simultaneously designing the circuits of the amplifying assembly 2, the converting assembly 3 and the sending assembly 4, and is particularly suitable for detecting tiny signals. According to one embodiment of the present invention, the detectable differential voltage signal is in the range of 10-40 μ V.
According to an embodiment of the present invention, the component selection and circuit design of the amplifying assembly 2 determine the amplification factor of the amplifying assembly 2 for a minute signal, for example, the amplification factor of the amplifying assembly 2 for a differential voltage signal may be 1000 times.
According to an embodiment of the present invention, the conversion component 3 is used for further converting the amplified analog signal into a digital signal, which is beneficial for the sending component 4 to further transmit the acquired signal, for example, after converting into a digital signal, the transmission not only can resist interference in transmission, but also can adopt a wireless transmission mode suitable for long-distance transmission. In the circuit of the strain gauge data acquisition unit, a filter can be arranged at a proper position, and interference is removed through filtering so as to further identify the effective signal.
According to one embodiment of the utility model, the strain gauge data collector further comprises a regulated power supply, and the strain gauge data collector is powered by the regulated power supply. The utility model contains various elements, especially contains sensitive elements, such as a strain gauge 1, belonging to vulnerable elements, and the elements are easy to burn out due to unstable voltage, so that the stable input voltage can be kept to the maximum extent by adopting a voltage-stabilized power supply, and the damage of the sensitive elements caused by the power supply is eliminated to a certain extent.
Furthermore, no matter what type of mode the strain gauge data collector is arranged, the collected data can be directly used according to different application occasions and environments, and an average number or a more complex algorithm can be further taken for monitoring the equipment state or serving as a basis for judging the vehicle state.
According to an embodiment of the utility model, the strain gauge in the strain gauge data collector adopts a full-bridge strain gauge, fig. 6 is an internal structure diagram of the full-bridge strain gauge according to an implementation form of the utility model, the full-bridge strain gauge is formed by connecting 4 strain gauges in a bridge manner, so that nonlinear errors and precision errors can be avoided, the phenomena that the traditional straight strain gauge is easily influenced by the environment, only the strain force in a single direction can be measured, and the strain drift is easily generated in the test process are avoided, and the output is more sensitive.
According to one embodiment of the utility model, in the strain gauge data collector, a strain gauge with a resistance value is selected, because the resistance strain gauge is based on a product of which the resistivity changes due to mechanical deformation of a semiconductor or conductor material when the semiconductor or conductor material is extruded by an external force or stretched by the external force, and therefore, the strain force in multiple directions can be tested.
Further, data acquisition of strain gauges with different resistance values is also influenced, in order to test the influence of gaskets made of different materials on a strain gauge data acquisition unit, comparison experiments are conducted on the strain gauges with different resistance values, strain gauges with 300 Ω and 1k Ω are selected in the experiments, fig. 7 is a data acquisition curve graph of a strain gauge with 300 Ω according to one implementation form of the utility model, fig. 8 is a data acquisition curve graph of a strain gauge with 1k Ω according to one implementation form of the utility model, and it is obvious from comparison of the two graphs that the sensitivity of the strain gauge with the resistance value of 300 Ω is higher, and acquired data are more stable than the strain gauge with the resistance value of 1k Ω.
According to another embodiment of the utility model, the liner is a hub chip liner or an aluminum alloy liner. In order to test the influence of liners made of different materials on a transformer plate data collector, the utility model performs comparison experiments on the liners made of different materials, wherein the liners are respectively a hub slice liner and a 2440 aluminum alloy liner, and the 2440 aluminum alloy liner has high elasticity. Fig. 9 is a graph showing data acquisition of a hub slice spacer according to an embodiment of the utility model, and fig. 10 is a graph showing data acquisition of a 2440 aluminum alloy spacer according to an embodiment of the utility model, and it can be seen from comparison of the two graphs that the data obtained by using the 2440 aluminum alloy spacer is more stable and has a higher degree of conformity with hub deformation, so that the 2440 aluminum alloy spacer is preferably used in combination with a strain gauge.
According to a further embodiment of the utility model, a motor vehicle is proposed, having at least one hub, on which the strain gauge data detection devices described above are arranged, preferably each strain gauge data detection device being arranged on each hub, all strain gauge data detection devices forming a strain gauge data detection device.
According to a further embodiment of the utility model, the same vehicle is equipped with strain gauge data collectors, preferably distributed on the vehicle, either in different positions on the same hub or on different hubs, as described above.
The distributed arrangement enables the sampling data of the strain gauge data collector to be more systematic and comprehensive, and brings a wider application scene for the strain gauge data collector.
The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (14)
1. The wheel with the load data acquisition device comprises a hub and a strain gauge data acquisition unit arranged on the hub, and is characterized in that a strain gauge unit of the strain gauge data acquisition unit is attached to the outer peripheral surface of a rim of the hub and is located at a position, centered along the axial direction of the wheel, on the outer peripheral surface of the rim, and a protective component fixed at the corresponding position of the outer peripheral surface of the rim is configured on the strain gauge unit.
2. The wheel of claim 1, wherein the strain gage element is configured as a full bridge strain gage.
3. A wheel according to claim 2, wherein the full bridge strain gauge is constituted by a resistive strain gauge having a resistance of 300 ohms.
4. A wheel according to any of claims 1 to 3, wherein a plurality of said strain gage elements are distributed circumferentially along the hub.
5. The wheel of claim 1, wherein the protective member comprises a gasket disposed between the strain gage element and the outer peripheral surface of the rim.
6. The wheel according to claim 5, wherein the upper and lower surfaces of the pad are adhesively fixed to the strain gauge unit and the outer peripheral surface of the rim, respectively, by an adhesive.
7. A wheel according to claim 5, wherein said pad is a sheet made of a metallic or non-metallic material having a coefficient of linear expansion which differs by 0-50% compared to the coefficient of linear expansion of the sensitive grids of the strain gauge elements and/or a modulus of elasticity which differs by 0-50% compared to the modulus of elasticity of the sensitive grids of the strain gauge elements.
8. A wheel according to claim 5, wherein said pad is a sheet made of 2440 aluminium alloy.
9. A wheel according to claim 7 or 8, wherein the thickness of the sheet is 0.5-5 mm.
10. The wheel of claim 1, wherein the guard member includes a shield fixed to the outer peripheral surface of the rim, the shield forming a sealed closed space with the outer peripheral surface of the rim, the strain gauge unit being accommodated in the closed space with being attached to the outer peripheral surface of the rim.
11. The wheel of claim 1, wherein the strain gage data collector further comprises:
the amplification assembly (2) is connected to the acquisition signal output side of the strain gauge unit and is electrically connected with the strain gauge in a differential mode, and the amplification assembly is used for amplifying the acquisition signal and outputting an amplification signal;
the conversion component (3) is connected to the output side of the amplification component, and the amplified signal is processed by the conversion component to form a digital signal; and
and the sending component is connected to the output side of the conversion component, and the digital signal is sent out by the sending component.
12. A wheel according to claim 11, wherein the strain gauge data collector is arranged to: the collected signals are made to form a differential voltage signal of 10-40 muV.
13. A wheel according to claim 12, wherein the strain gauge data collector is configured to: and the amplification factor of the amplification component to the differential voltage signal is 1000 times.
14. A motor vehicle, characterized in that it is equipped with at least one wheel according to any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220131299.4U CN216805016U (en) | 2022-01-18 | 2022-01-18 | Wheel with load data acquisition device and automobile with wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220131299.4U CN216805016U (en) | 2022-01-18 | 2022-01-18 | Wheel with load data acquisition device and automobile with wheel |
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| Publication Number | Publication Date |
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| CN216805016U true CN216805016U (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220131299.4U Active CN216805016U (en) | 2022-01-18 | 2022-01-18 | Wheel with load data acquisition device and automobile with wheel |
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| CN (1) | CN216805016U (en) |
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- 2022-01-18 CN CN202220131299.4U patent/CN216805016U/en active Active
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