Device and method for measuring dynamic deformation of vehicle component

Abstract

The invention relates to the technical field of measuring devices, in particular to a vehicle part dynamic deformation measuring device and a measuring method thereof.The device comprises a measuring base, the back of the measuring base is fixedly installed on a vehicle frame, and the front face of the measuring base is fixedly connected with a measuring instrument through a connecting plate; three or more stay wire displacement sensor units are integrated in the measuring instrument, one end of each stay wire displacement sensor unit penetrates out of the measuring instrument and then is connected with a header through a marked line, the header is fixedly connected with a mark base in a threaded mode, and one end of the mark base is connected to a target point of a vehicle part. According to the vehicle component dynamic deformation measuring device and the measuring method thereof, the space deformation displacement of the target point of the component in the xyz three-axis direction can be rapidly and accurately measured, and the most comprehensive movement condition of the component in the complex working condition can be given; the most direct and visual deformation condition of the moving part is provided for research and development designers, and the thought for solving problems is provided for the research and development designers.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring devices, and in particular to a vehicle component dynamic deformation measuring device and a measuring method thereof. Background Art

[0002] For the deformation and motion interference of moving parts in the current commercial vehicle research and development process, the use of simulation software to simulate the complex working conditions of commercial vehicles often cannot accurately simulate their actual motion state, and thus cannot provide accurate solutions. There are currently no feasible measurement methods and devices for the deformation of moving parts of real vehicles in the industry. Measurements in this regard all use static or quasi-static laboratory measurement methods, which have high requirements for the measurement environment. During the measurement process, it is also necessary to remove the parts and install them on specific tooling to apply theoretical loads, forces or displacements to them to simulate the motion deformation of the measurement parts. However, this method requires the disassembly of parts and requires specific tooling fixtures, which is expensive and consumes a lot of manpower, physics and time. At the same time, simulated loading cannot replicate the load deformation of the real vehicle under real conditions, and the variables controlled by simulated loading are relatively simple.

[0003] Currently, most domestic methods for measuring the motion deformation of vehicle components are carried out through theoretical simulation analysis. However, the deformation interference analysis of moving components under such complex working conditions in simulation analysis is not accurate enough. Especially in the analysis of domestic commercial vehicles, due to the limitations of foreign technology, it is impossible to accurately analyze the actual motion deformation. It can only be solved tentatively by constantly changing the scheme, which consumes a lot of manpower, material resources and time costs.

[0004] Current measurement equipment can only measure the deformation and displacement of vehicle components in a single linear direction. The data it can provide is relatively simple and cannot simultaneously fit its xyz spatial motion deformation. It cannot provide R&D and design personnel with the most comprehensive movement conditions of components in complex working conditions. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: in order to solve the problems existing in the above-mentioned background technology, a dynamic deformation measurement device and a measurement method for vehicle components are provided, which can quickly and accurately measure the spatial deformation displacement of the component target point in the xyz three-axis direction, and can provide the most comprehensive movement situation of the component under complex working conditions; provide R&D and design personnel with the most direct and intuitive deformation situation of the moving components, and provide R&D and design personnel with ideas for solving problems.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a dynamic deformation measuring device for vehicle components, including a measuring base, the back of the measuring base is fixedly mounted on the vehicle frame, the front of the measuring base is fixedly connected to a measuring instrument via a connecting plate, three or more wire displacement sensor units are integrated in the measuring instrument, one end of the wire displacement sensor unit passes through the measuring instrument and is connected to a header via a marking line, the header is fixedly connected to the marking base with threads, and one end of the marking base is connected to a target point of the vehicle component.

[0007] It is further defined that in the above technical solution, the marking line is a wear-resistant nylon line with low tensile and compression ratio.

[0008] It is further defined that, in the above technical solution, a data transmission cable is provided on one side of the measuring instrument.

[0009] It is further defined that, in the above technical solution, the connecting plate is fixed to the measuring base by bolts.

[0010] It is further defined that, in the above technical solution, the bottom surface of the measuring instrument is a right triangle.

[0011] A measuring method for a dynamic deformation measuring device of a vehicle component as claimed in claim 1, comprising the following steps: S1, fixing a reference base on a target point of a vehicle component; S2, fixing a measuring base on a reference component; S3, connecting a measuring instrument to the reference base and the measuring base respectively, and connecting one end of a data transmission cable to an external data acquisition and processing device; S4, turning on the measuring instrument and the external data acquisition and processing device at the same time to perform data acquisition and data processing; S5, starting the vehicle and controlling the vehicle to simulate various working conditions; S6, during this process, the measuring instrument collects and calculates the coordinates of point O at each time point at regular intervals, and displays the coordinates of these points in spatial coordinates in MATLAB in chronological order through data processing, thereby obtaining the spatial motion state of the target point; at the same time, the spatial deformation motion range of the target point and the motion range in a certain direction can be fitted.

[0012] It is further defined that, in the above technical solution, the various working conditions in S5 are vehicle turning, accelerating on a curve or emergency braking.

[0013] It is further defined that in the above technical solution, the data acquisition and processing equipment in S3 will sequentially record the lengths of the marking lines of multiple wire displacement sensors and calculate O(x, y, z) according to the measurement principle.

[0014] Further defined, in the above technical solution, the measurement principle is as follows: a measuring instrument with a right triangle bottom surface is used, and points A, B, and C are the lead-out holes of the marking lines on the three wire displacement sensor units. The positions and spacings of points A, B, and C are determined in the design, and point O is the fixed point of the three marking lines on the head. It is known that the length of AB is m, the length of BC is n, and the coordinates of points A, B, and C can be set as A(m, 0, 0), B(0, 0, 0), and C(0, n, 0). The distances from points A, B, and C to the target point O are measured by the wire displacement sensor and can be set as a, b, and c. The above data are all known or measurable data. The coordinates of point O can now be set as O(x, y, z) z>0. The process of calculating the coordinates of point O is as follows:

[0015] Because |OA|=a, A(m,0,0), according to the distance calculation method between two points in space, we can get (xm) 2 +y 2 +z 2 =a 2 ; Because |OB|=b, B(0,0,0), according to the distance calculation method between two points in space, we can get x 2 +y 2 +z 2 =b 2 ;

[0016] Because |OC|=c, C(0,n,0), according to the distance calculation method between two points in space, we can get x 2 +(yn) 2 +z 2 =c 2 ;

[0017] Combining the above three equations, we can get the coordinates of vertex O.

[0018]

[0019] The beneficial effects of the present invention are as follows: a vehicle component dynamic deformation measurement device and measurement method proposed by the present invention can quickly and accurately measure the spatial deformation displacement of the component target point in the xyz three-axis directions, and can provide the most comprehensive movement status of the component in complex working conditions; provide R&D and design personnel with the most direct and intuitive deformation status of the moving components, and provide R&D and design personnel with ideas for solving problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 yes Figure 1 Measurement principle diagram.

[0023] The numbers in the accompanying drawings are: 1. measuring base, 2. connecting plate, 3. measuring instrument, 4. marking line, 5. marking head, 6. marking base, 7. data transmission cable, 8. bolt. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] See Figure 1 and Figure 2 The figure shows a dynamic deformation measuring device for vehicle components, including a measuring base 1. The back of the measuring base 1 is fixedly mounted on the vehicle frame. The front of the measuring base 1 is fixedly connected to a measuring instrument 3 via a connecting plate 2. Three or more pull-wire displacement sensor units are integrated in the measuring instrument 3. One end of the pull-wire displacement sensor unit passes through the measuring instrument 3 and is connected to a header 5 via a marking line 4. The header 5 is fixedly connected to a marking base 6 with threads. One end of the marking base 6 is connected to a target point on the vehicle component.

[0026] The marking line 4 is made of wear-resistant, low-tensile-compression nylon. A data transmission cable 7 is installed on one side of the measuring instrument 3. The connecting plate 2 is fixed to the measuring base 1 by bolts 8. The bottom surface of the measuring instrument 3 is a right triangle.

[0027] A measuring method for a dynamic deformation measuring device of a vehicle component comprises the following steps: S1, fixing a marker 6 on a target point of a vehicle component; S2, fixing a measuring base 1 on a reference component; S3, connecting a measuring instrument 3 to the marker 6 and the measuring base 1 respectively, and connecting one end of a data transmission cable 7 to an external data acquisition and processing device; S4, simultaneously turning on the measuring instrument 3 and the external data acquisition and processing device to perform data acquisition and data processing; S5, starting a vehicle and controlling the vehicle to simulate various working conditions; S6, during this process, the measuring instrument collects and calculates the coordinates of point O at each time point at regular intervals, and displays the coordinates of these points in spatial coordinates in chronological order in MATLAB through data processing, thereby obtaining the spatial motion state of the target point; and simultaneously fitting the spatial deformation motion range of the target point and the motion range in a certain direction.

[0028] The various working conditions in S5 include turning, accelerating on a curve, or emergency braking. The data acquisition and processing equipment in S3 sequentially records the lengths of the markings of multiple wire displacement sensors and calculates O(x, y, z) based on the measurement principle. The measurement principle is as follows: Use a measuring instrument 3 with a right triangle bottom surface. Points A, B, and C are the lead-out holes for the marking lines on the three pull-wire displacement sensor units. The positions and spacing of points A, B, and C are determined in the design. Point O is the fixed point of the three marking lines on the head. It is known that the length of AB is m and the length of BC is n. For points A, B, and C, the coordinates of points A, B, and C can be set as A(m, 0, 0), B(0, 0, 0), and C(0, n, 0). The distances from points A, B, and C to the target point O are measured by the pull-wire displacement sensor and can be set as a, b, and c. The above data are all known or measurable data. Now the coordinates of point O can be set as O(x, y, z) z>0. The process of calculating the coordinates of point O is as follows: Because |OA|=a, A(m, 0, 0), according to the distance calculation method between two points in space, (xm) 2 +y 2 +z 2 =a 2； Because |OB|=b, B(0,0,0), according to the distance calculation method between two points in space, we can get x 2 +y 2 +z 2 =b 2 ; Because |OC|=c, C(0,n,0), according to the distance calculation method between two points in space, we can get x 2 +(yn) 2 +z 2 =c 2 ; Combining the above three equations, we can get the coordinates of vertex O:

[0029]

[0030] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A vehicle component dynamic deformation measurement device, characterized in that: It includes a measuring base, the back of which is fixedly mounted on the vehicle frame, the front of which is fixedly connected to a measuring instrument via a connecting plate, three or more draw-wire displacement sensor units integrated in the measuring instrument, one end of which passes through the measuring instrument and is connected to a header via a marking line, the header is fixedly connected to the mark base with threads, and one end of the mark base is connected to a target point on a vehicle component.

2. The vehicle component dynamic deformation measuring device according to claim 1, characterized in that: The marking line is a wear-resistant nylon line with a low tensile compression rate.

3. The vehicle component dynamic deformation measuring device according to claim 1, characterized in that: A data transmission cable is provided on one side of the measuring instrument.

4. The vehicle component dynamic deformation measuring device according to claim 1, characterized in that: The connecting plate is fixed on the measuring base by means of bolts.

5. The vehicle component dynamic deformation measuring device according to claim 1, characterized in that: The bottom surface of the measuring instrument is a right triangle.

6. A method for measuring the dynamic deformation of a vehicle component according to claim 1, characterized in that: The method comprises the following steps: S1, fixing the standard base on the target point of the vehicle component; S2, fixing the measuring base on the reference component; S3, connecting the measuring instrument to the standard base and the measuring base respectively, and connecting one end of the data transmission cable to the data acquisition and processing equipment; S4. Turn on the measuring instrument and external data acquisition and processing equipment at the same time to collect and process data; S5. Start the vehicle and control the vehicle to simulate various working conditions; S6. During this process, the measuring instrument collects and calculates the coordinates of point O at each time point at regular intervals. Through data processing, the coordinates of these points are displayed in spatial coordinates in chronological order in MATLAB to obtain the spatial motion state of the target point; at the same time, the spatial deformation motion range of the target point and the motion range in a certain direction can be fitted.

7. The measuring method of the vehicle component dynamic deformation measuring device according to claim 1, characterized in that: The various operating conditions in S5 are turning, accelerating on a curve or emergency braking of the vehicle.

8. The measuring method of the vehicle component dynamic deformation measuring device according to claim 1, characterized in that: The data acquisition and processing device in S3 records the lengths of the marking lines of the plurality of wire displacement sensors in sequence, and calculates O(x, y, z) according to the measurement principle.

9. The measuring method of the vehicle component dynamic deformation measuring device according to claim 8, characterized in that: The measurement principle is as follows: a measuring instrument with a right triangle bottom surface is used, and points A, B, and C are the lead-out holes for the marking lines on the three wire displacement sensor units. The positions and spacing of points A, B, and C are determined in the design. Point O is the fixed point of the three marking lines on the head. It is known that the length of AB is m and the length of BC is n. For points A, B, and C, the coordinates of points A, B, and C can be set as A(m, 0, 0), B(0, 0, 0), and C(0, n, 0). The distances from points A, B, and C to the target point O are measured by the wire displacement sensor and can be set as a, b, and c. The above data are all known or measurable data. The coordinates of point O can now be set as O(x, y, z) z>0. The process of calculating the coordinates of point O is as follows: Because |OA|=a, A(m,0,0), according to the distance calculation method between two points in space, we can get (xm) 2 +y 2 +z 2 =a 2 ; Because |OB|=b, B(0,0,0), according to the distance calculation method between two points in space, we can get x 2 +y 2 +z 2 =b 2 ; Because |OC|=c, C(0,n,0), according to the distance calculation method between two points in space, we can get x 2 +(yn) 2 +z 2 =c 2 ; Combining the above three equations, we can get the coordinates of vertex O:

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