A calibration device for high-speed vehicle external dimension measurement system
By designing the calibration device of the high-speed vehicle dimension measurement system, using the rectangular frame structure and sliding device, the problem of large errors in the existing calibration devices is solved, and higher calibration accuracy and error reduction are achieved.
Patent Information
- Application Number
- CN201911313251.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-12-18
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2039-12-18
AI Technical Summary
The existing calibration devices have large errors during calibration, and it is impossible to accurately ensure that multiple vibration sensors convert the same impact to the same size into the same voltage amplitude.
A calibration device for the dimension measurement system of high-speed vehicles is designed, including calibration frame and calibration plate with a rectangular frame structure. By setting up calibration frame bracket, calibration plate bracket, calibration slide device and ball head screw fixing block, the stable support of the sensor is achieved and Flexible adjustments to reduce errors.
It improves calibration accuracy, reduces errors, and realizes flexible collection and accurate calibration of multi-dimensional information.
Smart Images
Figure CN110987156B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of calibration devices, and in particular relates to a calibration device for a high-speed vehicle external dimension measurement system. Background Art
[0002] The railway vehicle wheel tread scratch detection system is a system that determines the degree of tread scratch by measuring the vibration of the wheel-rail system caused by the impact of the wheel tread scratch on the rail through the vibration sensor installed on the rail when the train passes through the detection area. Generally, multiple vibration sensors are installed in the detection area. When the wheel passes through the detection area, the vibration sensor converts the vibration of the rail into an electric charge, which is converted into a voltage signal by the charge amplifier unit at the back end and transmitted to the signal acquisition system. The performance differences between different sensors, the vibration differences at the installation positions, and the electrical characteristics of each charge amplifier unit cause deviations in the collected signals of the connected sensors. In order to ensure that multiple vibration sensors convert the same size of impact equivalents into the same voltage amplitude, the vibration sensor needs to be calibrated. At present, there are two main methods for calibrating vibration sensors: using a steel hammer to hit the upper surface of the rail where the vibration sensor is installed with the same force or using a handheld steel ball to release the steel ball at the same height from the upper surface of the rail where the vibration sensor is installed, so that the steel ball falls freely and hits the rail. Both methods will cause large errors in the calibration results. Summary of the invention
[0003] The object of the present invention is to provide a high-speed vehicle external dimension measurement system calibration device to solve the problem that the calibration results of the existing calibration devices have large errors.
[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a calibration device for a high-speed vehicle shape dimension measurement system, comprising a calibration frame and a calibration plate, the calibration frame being a rectangular frame structure, a calibration frame bracket being provided on the middle upper surface of the long side of the calibration frame, the calibration plate being arranged on the top of the calibration frame bracket and connecting two of the calibration frame brackets into one, a calibration plate bracket with a trapezoidal structure being provided in the middle of the lower surface of the calibration plate, an intermediate calibration pad being provided above one side of the calibration plate bracket, calibration supports being provided at the four ends of the lower surface of the calibration frame and a handle being provided at the middle of the four sides of the side surface, a calibration sliding device being provided on one side of the calibration plate, the calibration plate being fixedly connected to the linear guide at the bottom by hexagon socket bolts and square nut blocks, a guide rail slider being provided at the bottom of the linear guide, ball screw fixing blocks being provided around the calibration frame and on one side of the calibration plate, and a ball screw adjustment block being provided at the bottom of the ball screw fixing block.
[0005] Preferably, a calibration shoe foot pad is provided between the calibration frame and the calibration support.
[0006] Preferably, there are four handles in total, and the four handles are fixedly connected to the calibration frame via hexagon socket bolts and square nut blocks.
[0007] Preferably, two calibration frame brackets are provided, and the two calibration frame brackets are fixedly connected to the calibration frame by means of hexagon socket bolts and square nut blocks.
[0008] Preferably, a groove is provided on the top of the calibration frame bracket, and the calibration plate is nested in the groove and fixedly connected to the calibration frame bracket by means of a hexagon socket bolt and a square nut block.
[0009] Preferably, three rectangular calibration fixing blocks are provided between the calibration sliding device and the calibration plate.
[0010] The technical effects and advantages of the present invention are as follows: the calibration device of the high-speed vehicle external dimension measurement system realizes the support and fixation of the calibration plate by setting two calibration frame brackets and one calibration plate bracket, so that the support plate is firmly connected and the shaking is reduced. At the same time, a calibration sliding device is set, which is used in conjunction with the linear guide rail at the bottom of the calibration plate, so that the sensor can flexibly adjust its position, collect multi-directional information, improve the calibration accuracy and reduce errors. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the present invention;
[0012] Figure 2 A top view of the present invention;
[0013] Figure 3 It is a front view of the present invention;
[0014] Figure 4 It is an exploded structural diagram of the calibration plate and the calibration sliding device of the present invention;
[0015] Figure 5 It is a detailed diagram of the calibration plate bracket of the present invention;
[0016] Figure 6 It is an exploded structural diagram of the calibration frame support of the present invention;
[0017] Figure 7 It is an exploded structural diagram of the calibration frame of the present invention.
[0018] In the figure: 1-calibration frame, 2-calibration frame bracket, 3-calibration plate, 4-calibration plate bracket, 5-calibration support, 6-calibration sliding device, 7-linear guide rail, 8-guide rail slider, 9-calibration shoe foot pad, 10-handle, 11-ball head screw fixing block, 12 ball head screw adjustment block, 13 middle calibration pad. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0020] The present invention provides a calibration device for a high-speed vehicle external dimension measurement system as shown in the figure, comprising a calibration frame 1 and a calibration plate 3, wherein the calibration frame 1 is a rectangular frame structure, a calibration frame bracket 2 is provided on the middle upper surface of the long side of the calibration frame 1, the calibration plate 3 is arranged on the top of the calibration frame bracket 2 and connects the two calibration frame brackets 2 as a whole, a calibration plate bracket 4 with a trapezoidal structure is provided in the middle of the lower surface of the calibration plate 3, an intermediate calibration pad 13 is provided above one side of the calibration plate bracket 4, calibration supports 5 are provided at the four ends of the lower surface of the calibration frame 1 and a handle 10 is provided at the middle of the four sides of the side surface, a calibration sliding device 6 is provided on one side of the calibration plate 3, the calibration plate 3 is fixedly connected to the linear guide rail 7 at the bottom by a hexagon socket bolt and a square nut block, a guide rail slider 8 is provided at the bottom of the linear guide rail 7, ball screw fixing blocks 11 are provided around the calibration frame 1 and on one side of the calibration plate 3, and a ball screw adjustment block 12 is provided at the bottom of the ball screw fixing block 11. In addition, a calibration shoe pad 9 is provided between the calibration frame 1 and the calibration support 5, which can effectively alleviate and absorb the pressure and vibration on the calibration frame 1, making the overall structure more stable and helping to protect the calibration support 5 from damage. There are four handles 10, which are fixedly connected to the calibration frame 1 by hexagon socket bolts and square nut blocks, which are convenient for carrying and firmly connected. There are two calibration frame brackets 2, which are fixedly connected to the calibration frame 1 by hexagon socket bolts and square nut blocks, which are convenient for supporting the calibration plate 3 and firmly connected to the calibration frame 1. A groove is provided on the top of the calibration frame bracket 2, and the calibration plate 3 is nested in the groove and firmly connected to the calibration frame bracket 2 by hexagon socket bolts and square nut blocks, which is convenient for embedding the calibration plate 3 and firmly connected to the calibration plate 3 and the calibration bracket 2. Three rectangular calibration fixed blocks are provided between the calibration sliding device 6 and the calibration plate 3, which are convenient for connecting the calibration sliding device 6 with the calibration plate 3, and also play a role in buffering and anti-collision.
[0021] Working principle: When the calibration device of the high-speed vehicle dimension measurement system is working, the calibration frame 1 is first placed horizontally on the optical box, and then fixed by the ball screw positioning block 11, and fine-tuned by the ball screw adjustment block 12, and then the calibration slide device 6 is adjusted to allow the sensor to move along the linear guide 7, and then adjusted to different positions to collect multi-directional information. The calibration device of the high-speed vehicle dimension measurement system serves as a reference and parameter setting for the laser plane and camera parameters in the optical box. By replacing the calibration block, the basic alignment of the system, the preliminary system detection accuracy, and the precise system detection accuracy are completed in sequence, which greatly improves the calibration accuracy and reduces the error.
[0022] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A high-speed vehicle dimension measurement system calibration device, comprising a calibration frame (1) and a calibration plate (3), characterized in that: The calibration frame (1) is a rectangular frame structure. A calibration frame bracket (2) is provided on the upper surface of the middle part of the long side of the calibration frame (1). The calibration plate (3) is arranged on the top of the calibration frame bracket (2) and connects the two calibration frame brackets (2) into one body. A calibration plate bracket (4) with a trapezoidal structure is provided in the middle part of the lower surface of the calibration plate (3). An intermediate calibration pad (13) is provided on one side of the upper part of the calibration plate bracket (4). Calibration supports (5) are provided at the ends of the lower surface of the calibration frame (1) and handles (10) are provided in the middle of the side surface. There are four handles (10) in total. The four handles (10) are connected by hexagon socket head bolts and square nuts. The mother block is fixedly connected to the calibration frame (1); a calibration shoe pad (9) is provided between the calibration frame (1) and the calibration support (5); a calibration sliding device (6) is provided on one side of the calibration plate (3); the calibration plate (3) is fixedly connected to the linear guide rail (7) at the bottom through a hexagon socket bolt and a square nut block; a guide rail slider (8) is provided at the bottom of the linear guide rail (7); the sensor can be moved along the linear guide rail (7) by adjusting the calibration sliding device (6); ball screw fixing blocks (11) are provided around the calibration frame (1) and on one side of the calibration plate (3); a ball screw adjustment block (12) is provided at the bottom of the ball screw fixing block (11).
2. The high-speed vehicle dimension measurement system calibration device according to claim 1, characterized in that: There are two calibration frame brackets (2) in total, and the two calibration frame brackets (2) are fixedly connected to the calibration frame (1) via hexagon socket bolts and square nut blocks.
3. The high-speed vehicle dimension measurement system calibration device according to claim 1, characterized in that: A groove is provided on the top of the calibration frame bracket (2), and the calibration plate (3) is nested in the groove and fixedly connected to the calibration frame bracket (2) via a hexagon socket bolt and a square nut block.
4. The high-speed vehicle dimension measurement system calibration device according to claim 1, characterized in that: Three rectangular calibration fixing blocks are arranged between the calibration sliding device (6) and the calibration plate (3).