An integrated vision and laser based measurement system

Abstract

The utility model discloses an integrated measuring system based on vision and laser, including detection platform, the detection platform surface is equipped with wheel and the power mechanism of wheel transmission, visual vibration measuring system, visual vibration measuring system is equipped with adjustable azimuth's first camera towards wheel, laser speed measuring system, laser speed measuring system is equipped with adjustable azimuth's laser speed measuring appearance and second camera towards wheel, system host computer, system host computer electric connection power mechanism, visual vibration measuring system and laser speed measuring system respectively. The utility model discloses through the design has adjustable system component, makes visual vibration measuring system and laser speed measuring system can according to the actual installation position of wheel, and wheel size and the influence that the field environment flatness or other factors caused in the spot lets the azimuth of first camera and second camera be more convenient to adjust and use to can let system component between can install and use fast.

Description

Technical Field

[0001] This utility model relates to the field of railway wheel inspection, and in particular to an integrated measurement system based on vision and laser. Background Technology

[0002] The wheels of a gravity locomotive consist of three parts: the hub, the spokes, and the rim. They are manufactured using an integral rolling process. After long-term use, wear will occur between the wheel and the rail, resulting in different working conditions of the wheel at different speeds. In the routine inspection process, the gravity locomotive is driven into the workbench for inspection to ensure the working strength and service life of the wheels.

[0003] However, in the existing workflow, if a wheel has a major fault, on-site wheel inspection is required. However, existing inspection equipment is usually not part of the NQI testing system and cannot adjust the sensor's position relative to the wheel according to the on-site environment. Therefore, it is necessary to build a mechatronics system to realize the system structure for on-site sensor installation and wheel data acquisition. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an integrated measurement system based on vision and laser. The main problem is that the prior art cannot build a data acquisition system that is easy to adjust on the spot.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model is an integrated measurement system based on vision and laser, including a detection platform with a wheel and a power mechanism for driving the wheel mounted on its surface; a visual vibration measurement system with an adjustable-position first camera facing the wheel; a laser speed measurement system with an adjustable-position laser speedometer and a second camera facing the wheel; and a system host electrically connected to the power mechanism, the visual vibration measurement system, and the laser speed measurement system.

[0006] Preferably, both the visual vibration measurement system and the laser velocity measurement system are mounted on the surface of the track component, and the visual vibration measurement system and the laser velocity measurement system are located on the track component moving horizontally.

[0007] Preferably, the visual vibration measurement system further includes: a first support frame, which slides horizontally on the surface of the track component; a first longitudinal adjustment component, which is located at the front of the first support frame for longitudinal distance adjustment; a first vertical adjustment component, which is located at the bottom of the first longitudinal adjustment component for vertical distance adjustment, and the first camera is mounted at the bottom of the first vertical adjustment component.

[0008] Preferably, a connecting ring is provided on both sides of the wheel, and the surface of the connecting ring is provided with a mounting hole in an annular shape. A visual marker is installed on the surface of the mounting hole, and the visual marker is used for monitoring by the first camera.

[0009] Preferably, the laser speed measurement system further includes: a second support frame, which slides horizontally on the surface of the track component; a second longitudinal adjustment component, which is located at the front of the second support frame for longitudinal distance adjustment; and a second vertical adjustment component, which is located at the bottom of the second longitudinal adjustment component for vertical distance adjustment; the laser speed meter and the second camera are both installed at the bottom of the second adjustment component.

[0010] Preferably, the bottom of the track component is equipped with a base, the base is L-shaped, the testing platform is located inside the base, and the testing platform is U-shaped.

[0011] Preferably, the surface of the testing platform is provided with multiple mounting units, each mounting unit including: an opening groove, the opening groove being hollowed out on one side of the testing platform; a power shaft, the power shaft being located on the other side of the testing platform extending into the opening groove; and a bearing seat, the bearing seat being located at one end of the power shaft for fixing the power shaft.

[0012] Preferably, the number of installation units is at least two, the base is detachably connected to the track and the detection platform, and the track is detachably connected to the visual vibration measurement system and the laser velocity measurement system.

[0013] Preferably, the visual markers are symmetrically arranged on the surface of the connecting ring, and the visual markers extend from the inside of the opening slot to the side of the first camera. The system host includes a power supply, a storage unit, and a CPU.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, through the design of adjustable system components, enables both the visual vibration measurement system and the laser speed measurement system to be adjusted and used more easily based on the actual installation position of the wheel, the size of the wheel, and the influence of factors such as the flatness of the surrounding environment or other factors. It also allows for quick installation and use of the system components. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the testing platform structure of this utility model; Figure 3 This is a schematic diagram of the system modules of this utility model; In the diagram: 1. Detection platform; 2. Visual vibration measurement system; 21. First camera; 22. First support frame; 23. First longitudinal adjustment component; 24. First vertical adjustment component; 3. Laser velocimetry system; 31. Laser velocimeter; 32. Second camera; 33. Second support frame; 34. Second longitudinal adjustment component; 35. Second vertical adjustment component; 4. Wheel; 41. Connecting ring; 42. Mounting hole; 43. Visual marker; 5. System host; 6. Track component; 7. Base; 8. Mounting unit; 81. Opening slot; 82. Power shaft; 83. Bearing seat. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] In the attached diagram, all identical reference numerals refer to the same components.

[0018] In the first embodiment, as Figure 1-3 As shown, this utility model provides an integrated measurement system based on vision and laser, including a detection platform 1, on which wheels 4 and a power mechanism for transmitting power to wheels 4 are mounted. Visual vibration measurement system 2, wherein the visual vibration measurement system 2 is provided with a first camera 21 with adjustable orientation facing the wheel 4; The laser speed measurement system 3 is equipped with an adjustable laser speed meter 31 and a second camera 32 facing the wheel 4. System host 5, which is electrically connected to the power mechanism, the visual vibration measurement system 2 and the laser velocimetry system 3 respectively; Because heavy-duty electric locomotives need to be equipped with monitoring equipment on-site to quickly detect the target wheel 4 and collect the data after detection, the structure must be easy to assemble and temporarily use, and adaptable to most operating environments. Please see Figure 1 and 3 The structure is mainly designed so that after the target wheel 4 is fixed by the detection platform 1, the adjustable visual vibration measurement system 2 and the laser speed measurement system 3 measure the speed and monitor the vibration of the wheel 4, and output the data to the system host 5, and analyze the data collected in the current time segment according to the time domain.

[0019] For further details, please refer to Figure 1To facilitate on-site adjustment of the overall structure, both the visual vibration measurement system 2 and the laser velocity measurement system 3 have horizontal left-right, front-back longitudinal, and vertical adjustment mechanisms. The first support frame 22 and the second support frame 33 are both L-shaped structures that can slide horizontally on the surface of the track component 6. The first longitudinal adjustment component 23 and the second longitudinal adjustment component 34 can be electric telescopic rods with tracks, allowing the first vertical adjustment component 24 and the second vertical adjustment component 35 to move on the first support frame 22 and the second support frame 33 respectively based on the first longitudinal adjustment component 23 and the second longitudinal adjustment component 34. The first vertical adjustment component 24 is mainly connected to the first camera 21 and adjusts its orientation, while the second vertical adjustment component 35 is mainly connected to the second camera 32 and the laser velocity meter 31 and adjusts their orientations synchronously.

[0020] Specifically, the overall structure is easy to install. After moving the base 7 to the target area, the track 6 is installed on the top of the base 7, the detection table 1 is installed inside the base 7, and the first support frame 22 and the second support frame 33 are slid in from both ends of the track 6 and adjusted to the correct position. Then, they are fixed based on the C-shaped fastener. After installation, the target wheel 4 is fixed to one end of the drive shaft 82. The system host 5 controls the first longitudinal adjustment component 23, the second longitudinal adjustment component 34, the first vertical adjustment component 24 and the second vertical adjustment component 35 respectively, so that the first camera 21, the second camera 32 and the laser speed measuring instrument 31 correspond to the target wheel 4, thus completing the preparation of the overall structure. Subsequently, the system host 5 supplies power to the power mechanism, which then transmits power to the power shaft 82, causing the wheel 4 to rotate with the power shaft 82. At this time, the first camera 21, acting as a four-line camera (i.e., a high-speed camera with a four-wire connection), detects minute grayscale changes in the dynamic range based on wheel 4 tread abrasion, rim wear, and radial runout. The second camera 32, a 4K high-definition camera, mainly uses the laser velocimeter 31 to scan and generate a three-dimensional point cloud of the wheel 4, identify the rim edge features, and the 4K camera tracks the displacement of the feature points. Combined with the laser data, the angular velocity is calculated, so that the data of the wheel 4 at different speeds can correspond to data with different vibration amplitudes. This enables on-site acquisition of vibration amplitude changes of the wheel 4 at different speeds and times, which can be used as reference data for subsequent recording, tracing, or detailed analysis.

[0021] In another embodiment, such as Figure 1-2As shown, in order to make the vibration amplitude of the wheel 4 more obvious when the first camera 21 is visually monitored, a connecting ring 41 for installing visual markers is provided on both sides of the wheel 4. The visual markers 43 are fixed on the mounting holes 42 and extend from the opening slot 81 of the mounting unit 8 to the outside. When the first camera 21 moves to the back of the opening slot 81, it can form a visual monitoring function on the visual markers 43 in the vertical direction of the power shaft 82.

[0022] Furthermore, since the opening slot 81 is open on both the left and right sides, when the visual marker 43 is installed on the gear at a symmetrical angle, the wheel 4 can always be in a state of weight balance, avoiding the vibration of the wheel 4 caused by centrifugal force resulting in only one end having a visual marker.

[0023] Its structure further divides the mounting unit 8 of the testing platform 1 into two units. Since conventional gravity locomotive wheels 4 typically operate in groups of four, the testing process can perform simultaneous testing on pairs of wheels (groups of four), meaning data can be collected in the same environment according to a paired approach. Please refer to [link to relevant documentation]. Figure 1 The power shaft 82 extends to the outside of the detection table 1 at the end away from the opening slot 81. Therefore, a synchronous structure, such as a synchronous belt, can be connected between the two power shafts 82, so that one power structure can drive multiple power shafts 82 to rotate, allowing the paired wheels 4 to complete the monitoring operation in a simulated synchronous working environment, further increasing the accuracy of the collected data.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An integrated measurement system based on vision and laser, characterized in that, include: The testing platform (1) has wheels (4) and a power mechanism that drives the wheels (4) on its surface. A visual vibration measurement system (2) is provided with a first camera (21) with an adjustable orientation facing the wheel (4); A laser speed measurement system (3) is provided with an adjustable laser speed meter (31) and a second camera (32) facing the wheel (4); The system host (5) is electrically connected to the power mechanism, the visual vibration measurement system (2) and the laser velocimetry system (3).

2. The integrated measurement system based on vision and laser according to claim 1, characterized in that, The visual vibration measurement system (2) and the laser velocity measurement system (3) are both installed on the surface of the track component (6), and the visual vibration measurement system (2) and the laser velocity measurement system (3) are located on the track component (6) moving horizontally.

3. The integrated measurement system based on vision and laser according to claim 2, characterized in that, The visual vibration measurement system (2) also includes: The first support frame (22) slides horizontally on the surface of the track component (6); The first longitudinal adjustment member (23) is located at the front of the first support frame (22) and is used for longitudinal adjustment of distance; The first vertical adjustment member (24) is located at the bottom of the first longitudinal adjustment member (23) for vertically adjusting the distance, and the first camera (21) is installed at the bottom of the first vertical adjustment member (24).

4. The integrated measurement system based on vision and laser according to claim 3, characterized in that, Both sides of the wheel (4) are provided with connecting rings (41), and the surface of the connecting rings (41) is provided with mounting holes (42) in an annular shape. Visual markers (43) are installed on the surface of the mounting holes (42), and the visual markers (43) are used for monitoring by the first camera (21).

5. The integrated measurement system based on vision and laser according to claim 4, characterized in that, The laser velocimetry system (3) also includes: The second support frame (33) slides horizontally on the surface of the track component (6); The second longitudinal adjustment member (34) is located at the front of the second support frame (33) and is used for longitudinal adjustment of distance; The second vertical adjustment member (35) is located at the bottom of the second longitudinal adjustment member (34) and is used for vertical adjustment of distance; The laser velocimeter (31) and the second camera (32) are both installed at the bottom of the second adjusting component.

6. The integrated measurement system based on vision and laser according to claim 5, characterized in that, The bottom of the track component (6) is equipped with a base (7), which is L-shaped. The testing platform (1) is located inside the base (7) and is U-shaped.

7. The integrated measurement system based on vision and laser according to claim 6, characterized in that, The surface of the testing station (1) is provided with multiple mounting units (8), and the mounting unit (8) includes: An opening groove (81) is provided on one side of the testing table (1). A power shaft (82) is located on the other side of the testing table (1) and extends into the inner side of the opening slot (81); A bearing housing (83) is located at one end of the power shaft (82) and is used to fix the power shaft (82).

8. The integrated measurement system based on vision and laser according to claim 7, characterized in that, The number of installation units (8) is at least two. The base (7) is detachably connected to the track component (6) and the detection table (1). The track component (6) is detachably connected to the visual vibration measurement system (2) and the laser velocity measurement system (3).

9. The integrated measurement system based on vision and laser according to claim 8, characterized in that, The visual marker (43) is symmetrically arranged on the surface of the connecting ring (41). The visual marker (43) extends from the inside of the opening slot (81) to the side of the first camera (21). The system host (5) includes a power supply, a storage unit and a CPU.

Images