Straddle-type vehicle track geometry detection system

Abstract

This invention relates to the field of track measurement and discloses a straddle-type vehicle track geometry detection system, including a frame and a bogie. A detection frame is mounted on the frame, comprising upper and lower clamping plates symmetrically arranged on the frame. The four corners of the upper and lower clamping plates are fixed to the frame by screws. A crossbeam is installed between the two upper clamping plates, and a data acquisition system, an inertial detection unit, and 2D laser sensors are mounted on the crossbeam. A detection rod is suspended on the lower clamping plate, and 2D laser sensors for detecting guide wheels and stabilizing wheels are sequentially installed from top to bottom on the side wall of the detection rod near the track. This invention, by installing an inertial detection unit and multiple 2D laser sensors on the detection frame, can detect the positions of the running wheels, stabilizing wheels, and guide wheels of the bogie in real time as it travels along the track, and calculate the track irregularities. Simultaneously, the detection frame has sufficient strength and rigidity, and is lightweight, effectively avoiding fuzzy data caused by mechanical vibration.

Description

Technical Field

[0001] This invention relates to the field of track measurement, and in particular to a straddle-type vehicle track geometry detection system. Background Technology

[0002] Straddle-type monorail is a type of monorail system, belonging to the category of urban rail transit. It is a rail transit system supported, stabilized, and guided by a single track, with the car body using rubber tires straddling the track beam. Straddle-type monorail is a medium-capacity rail transit system, characterized by strong adaptability, low noise, small turning radius, and strong climbing ability, making it better suited to complex terrain. Construction of straddle-type monorail requires less investment and has a shorter construction period. It is intelligent, environmentally friendly, and highly adaptable. The average width of its elevated bridge piers is less than 2 meters, saving nearly half the footprint compared to other elevated rail transit systems. Piers can be erected in the center of urban roads or in green belts on both sides, resulting in a small footprint, minimal obstruction, flexible route selection, and minimal traffic interference with existing urban roads. The construction period for straddle-type monorail is only half that of a subway, and the cost is only one-third that of a subway.

[0003] However, monorail systems require high construction precision, otherwise it will affect the stability of rail transit operation. The existing method is to set up a gantry-type frame, and use the frame as a reference to use multiple displacement sensors and tilt sensors to detect various parameters of the track. However, such detection not only requires a large number of devices, but also the detection data is unstable. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the background art and to provide a straddle-type vehicle track geometry detection system.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A straddle-type vehicle track geometry detection system includes a frame and a bogie mounted at the front end of the frame. A detection frame for collecting data on the bogie's movement along the track is mounted on the frame. A clearance space is provided at the front end of the frame for installing the detection frame. The detection frame is made of aluminum alloy and includes upper and lower clamping plates symmetrically arranged on the frame. The four corners of the upper and lower clamping plates are fixed to the frame by screws. A crossbeam is installed between the two upper clamping plates. A data acquisition system is installed in the center of the crossbeam surface, and an inertial detection unit is installed in the center of the crossbeam bottom surface. 2D laser sensors for detecting the upper surface of the track are symmetrically installed on the bottom surfaces of the crossbeams on both sides of the inertial detection unit. The inertial detection unit and the 2D laser sensors are placed in the clearance space. A detection rod is suspended on the lower clamping plate. 2D laser sensors for detecting guide wheels and stabilizing wheels are installed sequentially from top to bottom on the side wall of the detection rod near the track.

[0007] A special-shaped pad is installed between the lower clamping plate and the frame to ensure that the detection rod is level.

[0008] Both sides of the upper and lower clamping plates are machined with bent portions arranged in opposite directions.

[0009] The beneficial effects of the straddle-type vehicle track geometry detection system provided by this invention are:

[0010] (1) By installing an inertial detection unit and multiple 2D laser sensors on the detection frame, the positions of the running wheels, stabilizing wheels and guide wheels of the bogie can be detected in real time as it travels along the track, and the unevenness of the track can be calculated. At the same time, the detection frame has sufficient strength and rigidity and is lightweight, which can effectively avoid fuzzy data caused by mechanical vibration.

[0011] (2) By setting up irregularly shaped pads, the level of the detection rod can be adjusted, thereby ensuring the accuracy of the detection;

[0012] (3) By processing the back-to-back bending parts on the upper and lower clamping plates, the structural strength of the upper and lower clamping plates can be improved, thereby avoiding vibration caused by insufficient strength of the upper and lower clamping plates, so that the entire detection system has good strength and rigidity. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural schematic diagram provided for an embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the detection frame provided in an embodiment of the present invention.

[0016] Reference numerals: 1. Chassis; 2. Bogie; 3. Inspection frame; 31. Upper clamping plate; 32. Lower clamping plate; 33. Bending section; 34. Screw; 35. Crossbeam; 36. Inspection rod; 37. Irregularly shaped pad; 4. Data acquisition system; 5. Inertial detection unit; 6. 2D laser sensor; 7. Track. Detailed Implementation

[0017] like Figure 1 , Figure 2As shown, the straddle-type vehicle track geometry detection system provided in this embodiment includes a frame 1 and a bogie 2 mounted on the front end of the frame 1. The bogie 2 is equipped with running wheels that travel on the surface of the track 7, as well as guide wheels and stabilizing wheels that travel along both sides of the track 7. A detection frame 3 is mounted on the frame 1 to collect data on the bogie 2's movement along the track 7. A clearance space is provided at the front end of the frame 1 for mounting the detection frame 3. The detection frame 3 is made of aluminum alloy and includes an upper clamping plate 31 and a lower clamping plate 32 symmetrically arranged on the frame 1. To improve the structural strength of the testing frame 3, both sides of the upper clamping plate 31 and the lower clamping plate 32 are machined with back-to-back bent portions 33. The bent portions 33 can improve the structural strength and rigidity of the upper clamping plate 31 and the lower clamping plate 32. The four corners of the upper clamping plate 31 and the four corners of the lower clamping plate 32 are fixed to the frame 1 by M20 screws 34. The torque of the M20 screws 34 is 260 N.m, and anti-loosening marks are painted on them. A crossbeam 35 is installed between the two upper clamping plates 31. The crossbeam 35 is installed on the upper clamping plates 31 by M16 bolts. The bolt has a torque of 160 N·m and is marked with anti-loosening marks. A data acquisition system 4 is installed in the middle of the surface of the crossbeam 35, and an inertial detection unit 5 is installed in the middle of the bottom surface of the crossbeam 35. The inertial detection unit 5 used for reference positioning and the data acquisition system 4 are among the components. 2D laser sensors 6 on the upper surface of the detection track 7 are symmetrically installed on the bottom surfaces of the crossbeam 35 on both sides of the inertial detection unit 5. The inertial detection unit 5 and the 2D laser sensors 6 are placed in a clearance space, and the detection range includes, but is not limited to, the traveling part of the running wheels; lower clamping plate 32. A detection rod 36 is mounted on the upper suspension and connected to the lower clamping plate 32 by M16 bolts with a torque of 160 N·m and marked with anti-loosening marks. Furthermore, to improve the levelness of the detection rod 36, a specially shaped pad 37 is installed between the lower clamping plate 32 and the frame 1 to ensure the levelness of the detection rod 36. On the side wall of the detection rod 36 near the track 7, 2D laser sensors 6 are installed sequentially from top to bottom to detect the guide wheel and stabilizing wheel. The detection range includes, but is not limited to, the traveling parts of the stabilizing wheel and guide wheel. The 2D laser sensors 6 in the detection system measure the contour of the track 7, the inertial detection unit 5 measures the attitude angle, and calculates the unevenness of the track 7.

[0018] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications and substitutions based on the technical solutions and inventive concepts provided by the present invention should be covered within the scope of protection of the present invention.

Claims

1. A straddle-type vehicle track geometry detection system, comprising a frame (1) and a bogie (2) mounted on the front end of the frame (1), wherein a detection frame (3) for collecting data on the travel of the bogie (2) along the track (7) is mounted on the frame (1), characterized in that: The front end of the frame (1) has clearance for mounting the testing frame (3). The testing frame (3) is made of aluminum alloy and includes an upper clamping plate (31) and a lower clamping plate (32) symmetrically arranged on the frame (1). The four corners of the upper clamping plate (31) and the four corners of the lower clamping plate (32) are fixed to the frame (1) by screws (34). A crossbeam (35) is installed between the two upper clamping plates (31). A data acquisition system (4) is installed in the middle of the surface of the crossbeam (35). An inertial detection unit (5) is installed in the middle of the bottom surface of the crossbeam (35). The bottom surfaces of the crossbeam (35) on both sides of the inertial detection unit (5) are... A 2D laser sensor (6) is installed on the upper surface of the detection track (7). The inertial detection unit (5) and the 2D laser sensor (6) are placed in the clearance space. A detection rod (36) is suspended on the lower clamping plate (32). A 2D laser sensor (6) for detecting guide wheels and stabilizing wheels is installed on the side wall of the detection rod (36) near the track (7) from top to bottom. A special-shaped pad (37) to ensure the level of the detection rod (36) is installed between the lower clamping plate (32) and the frame (1). Both sides of the upper clamping plate (31) and the lower clamping plate (32) are processed with bent parts (33) arranged in opposite directions.

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