Vehicle-mounted contact rail detection device

Abstract

The utility model discloses a vehicle-mounted contact rail detection device, belongs to the field of rail detection, and aims to reduce labor intensity and improve efficiency. Comprising a rail inspection beam, an acceleration sensor and a pressure sensor. The rail detection beam stretches across the vehicle bottom, and a laser 2D sensor, a camera and a data collector are integrated on the rail detection beam. The acceleration sensor is mounted at the bottom of the collector shoe carbon slide plate; the pressure sensor is installed between the current collector body and the collector shoe carbon slide plate. Detection equipment such as a laser 2D sensor, a camera and a data collector is integrated through the rail detection beam, the complexity of installing the detection equipment under a vehicle is simplified, and the purpose of dynamically detecting the contact rail is achieved. And the pressure sensor, the acceleration sensor and other equipment are mounted on the under-vehicle current collector, so that the detection of the rail detection beam can be corrected, and the detection precision can be improved. Workers do not need to frequently carry out squatting operation, the labor intensity is reduced, the detection efficiency is improved, the geometric state parameter change of the contact rail can be mastered in real time, and the digitization degree is improved.

Description

Technical Field

[0001] This utility model belongs to the field of track inspection, specifically a vehicle-mounted contact rail inspection device. Background Technology

[0002] The contact rail power supply system is one of the main power supply systems for urban rail transit. The geometric parameters of the contact rail directly affect the normal operation of the locomotive and the quality of current collection; therefore, the detection of the geometric parameters of the contact rail is very important.

[0003] Currently, the detection of geometric parameters of subway contact rails in China mainly uses a special contact rail inspection ruler similar to a support ruler. This requires workers to frequently squat down, resulting in high labor intensity, large workload, low efficiency, and low accuracy. It is not conducive to real-time monitoring of changes in contact rail geometric parameters and has a low degree of digitalization. Utility Model Content

[0004] The purpose of this invention is to provide an on-board contact rail detection device that enables the detection of contact rail geometric parameters during vehicle operation, thereby reducing labor intensity and improving efficiency.

[0005] The technical solution adopted in this utility model is: an on-board contact rail detection device, including a rail inspection beam, an acceleration sensor, and a pressure sensor; the rail inspection beam spans across the underside of the vehicle, and two sets of laser 2D sensors for detecting the contact rail guide height and pull-out are integrated on the rail inspection beam; a camera is installed along the transverse side of the rail inspection beam adjacent to the contact rail; and a data acquisition unit is integrated on the rail inspection beam; the acceleration sensor is installed at the bottom of the current collector's carbon sliding plate; the pressure sensor is installed between the current collector body and the current collector's carbon sliding plate; the camera is communicatively connected to the data acquisition unit to collect data. Information is transmitted to the data acquisition unit; the laser 2D sensor is communicatively connected to the data acquisition unit and transmits the acquired information to the data acquisition unit; the acceleration sensor is connected to the data acquisition unit and transmits the acquired information to the data acquisition unit; the pressure sensor is connected to the data acquisition unit and transmits the acquired information to the data acquisition unit; the data acquisition unit is connected to the in-vehicle controller via data cable one; the current sensor is installed on the high-voltage bus of the current collector; the arc measuring instrument is installed on the body of the current collector and aligned with the carbon sliding plate of the current collector shoe; the current sensor and the arc measuring instrument are connected to the in-vehicle controller via data cable two.

[0006] Furthermore, of the two sets of laser 2D sensors, one set is a traveling rail laser 2D sensor for detecting the traveling rail, and the other set is a contact rail laser 2D sensor for detecting the contact rail; there are two traveling rail laser 2D sensors in one set, which are arranged laterally along the rail inspection beam on both sides of the bottom of the rail inspection beam; there is one contact rail laser 2D sensor in the other set, which is arranged laterally along the rail inspection beam on the side of the rail inspection beam adjacent to the contact rail.

[0007] Furthermore, the data acquisition device is positioned laterally along the middle of the track inspection beam.

[0008] Furthermore, the camera and the contact rail laser 2D sensor are arranged side by side along the longitudinal direction of the rail inspection beam.

[0009] Furthermore, it includes a laser speed sensor installed under the vehicle; a reflective sticker is affixed to the outer side of the wheel rim near the laser speed sensor; the laser speed sensor scans the reflective sticker; and the laser speed sensor is communicatively connected to the vehicle controller.

[0010] The beneficial effects of this utility model are as follows: The vehicle-mounted contact rail detection device disclosed in this utility model integrates laser 2D sensors, cameras, and data acquisition devices into the rail inspection beam, simplifying the complexity of installing detection equipment under the vehicle and achieving the purpose of dynamic detection of the contact rail. By installing pressure sensors and acceleration sensors on the under-vehicle current collector, the detection of the rail inspection beam can be corrected, which helps to improve detection accuracy. It eliminates the need for workers to frequently squat, reducing labor intensity, improving detection efficiency, facilitating real-time monitoring of changes in the contact rail's geometric parameters, and enhancing the degree of digitalization. Attached Figure Description

[0011] Figure 1 This is a system diagram of the vehicle-mounted contact rail detection device disclosed in this utility model;

[0012] Figure 2 This is a schematic diagram of the vehicle-mounted contact rail detection device disclosed in this utility model;

[0013] Figure 3 This is a schematic diagram of the track inspection beam structure;

[0014] Figure 4 This is a schematic diagram of the current collector structure.

[0015] In the diagram, the components are: 1. Track inspection beam; 2. Camera; 3. Laser 2D sensor; 3A. Laser 2D sensor for the travel rail; 3B. Laser 2D sensor for the contact rail; 4. Data acquisition unit; 5. Accelerometer; 6. Pressure sensor; 7. Current sensor; 8. Arc measuring instrument; 9. Data transmission cable 1; 10. Data cable 2; 11. Contact rail; 12. Current collector; 13. Carbon sliding plate for current collector shoe; 14. Controller; 15. Travel rail; 16. Laser speed sensor. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] In this utility model, the terms "longitudinal," "lateral," "vertical," "up," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the appendix. Figure 3 The orientation or positional relationship shown is for the purpose of describing the present invention only, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0018] Onboard contact rail detection device, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the system includes a track inspection beam 1, an acceleration sensor 5, and a pressure sensor 6. The track inspection beam 1 spans across the underside of the vehicle and integrates two sets of laser 2D sensors 3 for detecting the guide height and pull-out of the contact rail 11. A camera 2 is installed transversely along the track inspection beam 1 on the side of the track inspection beam 1 adjacent to the contact rail 11. A data acquisition unit 4 is also integrated on the track inspection beam 1. The acceleration sensor 5 is installed at the bottom of the current collector shoe carbon slide plate 13 of the current collector 12. The pressure sensor 6 is installed between the body of the current collector 12 and the current collector shoe carbon slide plate 13 of the current collector 12. The camera 2 is communicatively connected to the data acquisition unit 4 and transmits the collected information to the data acquisition unit 4. The laser 2D sensor 3 is communicatively connected to the data acquisition unit 4, transmitting the collected information to the data acquisition unit 4; the acceleration sensor 5 is connected to the data acquisition unit 4, transmitting the collected information to the data acquisition unit 4; the pressure sensor 6 is connected to the data acquisition unit 4, transmitting the collected information to the data acquisition unit 4; the data acquisition unit 4 is connected to the in-vehicle controller 14 via data cable 19; the current sensor 7 is installed on the high-voltage bus of the current collector 12; the arc measuring instrument 8 is installed on the body of the current collector 12, aligning with the carbon sliding plate 13 of the current collector shoe; the current sensor 7 and the arc measuring instrument 8 are connected to the in-vehicle controller 14 via data cable 20.

[0019] This utility model discloses an on-board contact rail detection device, in which two sets of laser 2D sensors 3 are used to detect the guide height and pull-out of the contact rail. Of the two sets of laser 2D sensors 3, one set is a traveling rail laser 2D sensor 3A used to detect the outline of the traveling rail. Therefore, there are two traveling rail laser 2D sensors 3A, which are arranged laterally along the bottom of the rail inspection beam 1 on both sides. The left traveling rail laser 2D sensor 3A is used to illuminate the outline of the left traveling rail, and the right traveling rail laser 2D sensor 3A is used to illuminate the outline of the right traveling rail, according to... Figure 3 The offset compensation calculation is performed using the reference coordinate system shown. The specific process is as follows: When the vehicle is stationary, the outline of the travel rail is illuminated by two travel rail laser 2D sensors 3A to obtain the geometric positional relationship between the vehicle body and the travel rail surface, and this position is marked as the static initial origin; when the vehicle is running, real-time data is measured by the travel rail laser 2D sensors 3A to obtain the dynamic positional relationship between the vehicle body and the travel rail surface; by converting the geometric relationship between the dynamic and static positions, the vehicle body tilt angle and offset are accurately obtained.

[0020] Since two sets of laser 2D sensors 3 are integrated on the track inspection beam 1, and the track inspection beam 1 is installed across the bottom of the vehicle, the vehicle moves with the track inspection beam 1, thus enabling detection during vehicle movement. In other words, the detection of the vehicle-mounted contact rail detection device disclosed in this utility model is dynamic detection. The acceleration sensor 5 can accurately collect the acceleration during the dynamic driving process of the vehicle. The pressure sensor 6 is used to accurately measure the force relationship between the current collector shoe carbon sliding plate 13 and the contact rail 11. The acceleration during the driving process, the force relationship information between the current collector shoe carbon sliding plate 13 and the contact rail 11, and the tilt angle and offset information between the vehicle body and the rail surface are transmitted to the data acquisition unit 4 for processing and summarization. The measurement reference is converted from the vehicle body as the measurement reference to the track center as the measurement reference, and finally the vehicle body vibration measurement error compensation and correction is realized.

[0021] Another set consists of a contact rail laser 2D sensor 3B, used to illuminate the contact rail 11. The contact rail laser 2D sensor 3B is transversely positioned along the rail inspection beam 1 on the side adjacent to the contact rail 11. The contact rail laser 2D sensor 3B captures a laser contour image of the contact rail. By pre-designing a specific installation angle for this 2D sensor, it captures an image of the contact rail 11 illuminated by the laser source. The laser source projects onto the surface of the contact rail 11. Utilizing the principle of triangulation, the camera lens of the contact rail laser 2D sensor 3B forms a certain angle with the laser source to capture a structured light image of the contact rail 11 surface. Through a visual imaging model, the distance between the contact rail 11 and the contact rail laser 2D sensor 3B is calculated. The signal collected by the contact rail laser 2D sensor 3B is transmitted to the data acquisition unit 4. Based on image filtering, noise reduction, and feature extraction, the geometric parameters of the contact rail 11 are obtained. The geometric parameters are as follows: Figure 3 The guide height value H and pull-out value L are shown. The guide height value H is the distance between the track plane and the bottom surface of the contact rail 11; the pull-out value L is the distance between the center line of the train body and the center line of the contact rail 11.

[0022] Data acquisition unit 4 aggregates data from some sensors under the vehicle and then transmits the data to the in-vehicle controller 14 via data cable 9. The setup of data acquisition unit 4 reduces the installation of under-vehicle cables, lowering installation complexity. Furthermore, the signals transmitted from the under-vehicle acceleration sensors, pressure sensors, cameras, and laser 2D sensors to data acquisition unit 4 are synchronized and processed before being aggregated and transmitted to the in-vehicle controller via an industrial-grade Ethernet cable, facilitating post-processing of the uploaded data.

[0023] Camera 2 is an auxiliary geometric parameter detection device. The data it collects is used to assist in calculations. Camera 2 can also observe the on-site test situation in real time during the acquisition process, record some data, and prevent safety accidents from occurring.

[0024] The current sensor 7 is installed on the high-voltage bus of the current receiver and is connected to the in-vehicle controller 14 for comprehensive data processing. The current sensor 7 collects the effective value of the current after the carbon sliding plate draws power from the contact rail 11, and transmits the collected signal to the in-vehicle controller 14 for data processing, and then displays the current value to the industrial control computer terminal.

[0025] The arc measuring instrument 8 is a device for detecting the number and duration of arcs generated by the carbon slide plate during the flow process. The arc lens monitors the carbon slide plate in real time during vehicle operation, and the data it collects is transmitted to the in-vehicle controller 14 via data cable 10 for processing and real-time display.

[0026] The vehicle-mounted contact rail detection device disclosed in this utility model integrates a laser 2D sensor 3, a camera 2, and a data acquisition device 4 into the rail inspection beam 1, simplifying the complexity of installing detection equipment under the vehicle and enabling dynamic detection of the contact rail. The pressure sensor 6 and acceleration sensor 5 installed on the under-vehicle current collector 12 can correct the detection of the rail inspection beam 1, thus improving detection accuracy.

[0027] The data acquisition unit 4 is positioned transversely along the middle of the track inspection beam 1. This central location facilitates connection with various inspection devices and the vehicle's control system.

[0028] In order to avoid interference and effectively illuminate the track inspection beam 1, the camera 2 and the contact rail laser 2D sensor 3B are arranged side by side along the longitudinal direction of the track inspection beam 1.

[0029] It also includes a laser speed sensor 16 installed under the vehicle; a reflective sticker is attached to the outer side of the wheel rim near the laser speed sensor 16; when the wheel rotates, the laser speed sensor 16 scans the reflective sticker to obtain a speed pulse signal, and the laser speed sensor 16 sends the obtained speed pulse signal to the in-vehicle controller 14 to obtain the vehicle speed.

Claims

1. A contact rail detection device for a vehicle, characterized in that: The rail inspection beam (1), the acceleration sensor (5) and the pressure sensor (6) are included. The rail inspection beam (1) is across the bottom of the car, and two groups of laser 2D sensors (3) for detecting the contact rail (11) guide height and pulling out are integrated on the rail inspection beam (1); a camera (2) is installed on the side of the rail inspection beam (1) adjacent to the contact rail (11) along the rail inspection beam (1); and a set of data collectors (4) are integrated on the rail inspection beam (1). The acceleration sensor (5) is installed to the bottom of the carbon slide plate (13) of the current collector (12). The pressure sensor (6) is installed between the body of the current collector (12) and the carbon slide plate (13) of the current collector (12). The camera (2) is in communication connection with the data collector (4), and the collected information is transmitted to the data collector (4). The laser 2D sensor (3) is in communication connection with the data collector (4), and the collected information is transmitted to the data collector (4). The acceleration sensor (5) is connected with the data collector (4), and the collected information is transmitted to the data collector (4). The pressure sensor (6) is connected with the data collector (4), and the collected information is transmitted to the data collector (4). The data collector (4) is connected with the in-car controller (14) through the data cable I (9). The current sensor (7) is installed on the high-voltage bus of the current collector (12); the arc measurement instrument (8) is installed on the body of the current collector (12) to center the carbon slide plate (13) of the current collector (12); the current sensor (7) and the arc measurement instrument (8) are connected with the in-car controller (14) through the data cable II (10).

2. The on-board contact rail detection device according to claim 1, characterized in that: Among the two groups of laser 2D sensors (3), one group is the walking rail laser 2D sensor (3A) for detecting the walking rail, and the other group is the contact rail laser 2D sensor (3B) for detecting the contact rail (11); there are two walking rail laser 2D sensors (3A) in one group, which are arranged on both sides of the bottom of the rail inspection beam (1) along the rail inspection beam (1); there is one contact rail laser 2D sensor (3B) in one group, which is arranged on the side of the rail inspection beam (1) adjacent to the contact rail (11) along the rail inspection beam (1).

3. The on-board contact rail detection device according to claim 2, characterized in that: The data collector (4) is arranged in the middle of the rail inspection beam (1) along the rail inspection beam (1).

4. The on-board contact rail detection device according to claim 2 or 3, characterized in that: The camera (2) and the contact rail laser 2D sensor (3B) are arranged longitudinally side by side along the rail inspection beam (1).

5. The on-board contact rail detection device according to claim 4, characterized in that: The laser speed sensor (16) is installed on the bottom of the car; a reflective sticker is pasted on the outer side of the wheel rim near the laser speed sensor (16); the laser speed sensor (16) scans the reflective sticker; the laser speed sensor (16) is in communication connection with the in-car controller (14).

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