Device for positioning relative position of steel rail and overhead line system rod based on point laser
Through the relative positioning device of the rail and the contact mesh rod based on point laser, the problem of low longitudinal displacement detection accuracy and complex operation in the prior art is solved, and efficient and accurate rail displacement detection is achieved, which is suitable for maintenance work of high-speed railways.
Patent Information
- Application Number
- CN202421559103.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-03
AI Technical Summary
In the prior art, the longitudinal displacement detection method of rails has problems such as low measurement accuracy, complex operation, high equipment cost, and difficult manual maintenance, and cannot meet the needs of high-efficiency and high-precision measurement of high-speed railways.
The relative position positioning device of the rail and the contact mesh rod based on point laser is used to detect the optical detection components on the vehicle body and the targets arranged on the rail and the contact mesh rod to realize the relative position positioning of the rail and the contact mesh rod.
It improves measurement accuracy, reduces equipment cost and manual maintenance difficulty, and is suitable for most models. It has simple installation and stable measurement structure, which can meet the high-efficiency and high-precision measurement needs of high-speed railways.
Smart Images
Figure CN222978788U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a field, in particular to a relative position positioning device for a steel rail and a catenary pole based on a point laser. Background Technique
[0002] In China, seamless tracks are generally adopted for high-speed railways. This method has no rail joints, greatly reducing vibration and effectively improving the track structure. However, due to the absence of rail gaps, the steel rails cannot freely expand and contract when the temperature changes, resulting in large temperature stresses inside the steel rails. When the fastener pressure is not sufficient to offset the temperature stress, the steel rails will undergo longitudinal displacement. When the temperature rises, it is easy to cause rail buckling and runway, and when the temperature drops, it is easy to have rail breaks, posing a great safety hazard to operating trains.
[0003] At present, the main methods for measuring the longitudinal displacement of steel rails are: the manual wire-pulling method with displacement observation piles, observing the longitudinal displacement of steel rails with optical instruments, establishing a non-linear mechanical equation set of steel rails to solve the distribution and displacement of longitudinal forces of steel rails, and laser measurement of the longitudinal displacement of steel rails, etc.
[0004] The measurement accuracy of the wire-pulling measurement method can generally only reach within ±5 mm, and the workload is large, requiring more than two people for measurement; the operation of an optical theodolite is complex and inconvenient to use; the equipment required for the laser measurement method and the optoelectronic technology measurement method is expensive and the use cost is high. At present, several methods for detecting the creep displacement of steel rails based on machine vision have been successively proposed, but these all require burying detection devices on both sides of the railway shoulder. This method has a high cost and great difficulty in manual maintenance. The detection position is relatively fixed. When measurement is required at other positions on the line, the detection device needs to be reinstalled repeatedly, and there are certain risks in installation and on-site measurement.
[0005] In railway maintenance sites, the creep of steel rails is mainly detected by using observation piles buried on both sides of the line. The position deviation of the steel rail marking points relative to the observation piles is observed through observation tools, and the creep amount of the steel rails at a certain line section during a certain period is obtained by comparing the two observation results. This method not only has a high labor cost, but also the detection accuracy is affected by factors such as manual detection experience and equipment status, with low detection efficiency and difficult to guarantee repeatability.
[0006] Aiming at the problem of detecting the longitudinal displacement of seamless track steel rails, both the manual wire-pulling method with displacement observation piles and the optical instrument observation method with displacement observation piles need to bury displacement observation piles on both sides of the line and are jointly operated by 3 to 4 people to complete the operation. They have the disadvantages of high input cost, low efficiency, and high labor intensity, and the buried displacement observation piles are easy to move and have too many human factors, resulting in low measurement accuracy. Although the existing laser measurement method for the longitudinal displacement of steel rails has been improved compared with the manual wire-pulling method with displacement observation piles and the optical instrument observation method with displacement observation piles, there are still problems such as poor measurement accuracy, complex operation, and poor safety performance, and it cannot meet the requirements of high-efficiency and high-precision measurement work for high-speed railways. Summary of the Utility Model
[0007] The utility model is to solve the problems that in the prior art, the measurement accuracy of the wire-pulling measurement method can generally only reach within the range of ±5 mm, and the workload is large, requiring more than two people for measurement; the operation of the optical theodolite is complex and inconvenient to use; the equipment required for the laser measurement method and the optoelectronic technology measurement method is expensive and the use cost is high. The utility model provides a relative position positioning device for a rail and a catenary pole based on a point laser, which solves the problems of the prior art.
[0008] The utility model provides a relative position positioning device for a rail and a catenary pole based on a point laser, which includes a vehicle body, a pair of optical detection components, a plurality of first measurement targets, a plurality of second measurement targets, a plurality of first reference targets, a plurality of second reference targets, a pair of rails and a plurality of catenary poles. The two rails are arranged in parallel on the ground, and the catenary poles are evenly arranged in pairs on the outer sides of the two rails. The first reference targets and the second reference targets are respectively arranged on the inner side surfaces of the catenary poles on different sides, and there is a one-to-one correspondence between the first reference targets and the catenary poles, and between the second reference targets and the catenary poles. The first reference targets and the second reference targets are at the same height. The first measurement targets and the second measurement targets are respectively evenly arranged at the outer side positions of the two rails. The two optical measurement components are respectively arranged at the two side edge positions of the bottom surface of the vehicle body. The vehicle body moves on the rails, and the working orientations of the optical measurement components are both in the two directions of the rail orientation and the catenary pole orientation. The detection ends of the two optical measurement components respectively detect the first measurement targets and the first reference targets, and the second measurement targets and the second reference targets. The first measurement targets, the second measurement targets, the first reference targets and the second reference targets are all triangular targets.
[0009] In a preferred embodiment of the relative position positioning device for a rail and a catenary pole based on a point laser according to the utility model, the optical detection component includes a first area array camera, a second area array camera, a first line laser, a second line laser and a seat body. The first area array camera, the second area array camera, the first line laser and the second line laser are all arranged on the bottom surface of the seat body, and the top surface of the seat body is installed on the bottom surface of the vehicle body. The first area array camera and the first line laser are both oriented towards the set target position direction of the catenary pole, and the second area array camera and the second line laser are both oriented towards the set target position direction of the rail.
[0010] In a preferred embodiment of the relative position positioning device for a rail and a catenary pole based on a point laser according to the utility model, the first reference target, the second reference target, the first measurement target and the second measurement target are all targets with an isosceles triangle cross-section composed of two inclined planes, and the ridge lines of the two inclined planes are perpendicular to the rail tangent line. The ridge lines of the first reference target and the second reference target are both perpendicular to the ground.
[0011] A relative position positioning device for a rail and a catenary pole based on a point laser. As a preferred embodiment, the included angle range between the optical axis of the first area array camera and the horizontal direction and the included angle range between the optical axis of the first line laser and the horizontal direction are both [0, 50] degrees, and the included angle range between the optical axis of the second area array camera and the horizontal direction and the included angle range between the optical axis of the second line laser and the horizontal direction are both [30, 90] degrees.
[0012] The beneficial effects of the present utility model are as follows:
[0013] (1) The measurement component is miniaturized, has a small requirement for the installation space, strong adaptability, simple installation, and can be applied to most vehicle models;
[0014] (2) Both the rail web and the catenary pole target are installed by means of a hoop buckle, which is convenient and firm to install, and ensures the stability of the measurement structure to the greatest extent without affecting the train operation safety and line maintenance;
[0015] (3) The detection target is equipped with a backlight source, which has high brightness and uniform light emission, and can ensure the measurement accuracy while resisting interference. Description of the Drawings
[0016] Figure 1 It is a schematic diagram of a relative position positioning device for a rail and a catenary pole based on a point laser;
[0017] Figure 2 It is a schematic diagram of an optical detection component of a relative position positioning device for a rail and a catenary pole based on a point laser.
[0018] Reference Signs:
[0019] 1, vehicle body; 2, optical detection component; 21, first area array camera; 22, second area array camera; 23, first line laser; 24, second line laser; 25, seat body; 3, first measurement target; 4, second measurement target; 5, first reference target; 6, second reference target; 7, rail; 8, catenary pole. Detailed Embodiments
[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.
[0021] Embodiment 1
[0022] As Figure 1As shown in the figure, a relative position positioning device for a rail and a catenary pole based on a point laser includes a vehicle body 1, a pair of optical detection components 2, a number of first measurement targets 3, a number of second measurement targets 4, a number of first reference targets 5, a number of second reference targets 6, a pair of rails 7 and a number of catenary poles 8. The two rails 7 are arranged in parallel on the ground, and the catenary poles 8 are evenly arranged in pairs on the outer sides of the two rails 7. The first reference targets 5 and the second reference targets 6 are respectively arranged on the inner sides of the catenary poles 8 on different sides. There is a one-to-one correspondence between the first reference targets 5 and the catenary poles 8, and between the second reference targets 6 and the catenary poles 8. The first reference targets 5 and the second reference targets 6 are at the same height. The first measurement targets 3 and the second measurement targets 4 are respectively and evenly arranged at the outer side positions of the two rails 7. The two optical detection components 2 are respectively arranged at the two side edge positions of the bottom surface of the vehicle body 1. The vehicle body 1 moves on the rails 7. The working directions of the optical detection components 2 are both in the two directions of the rail 7 direction and the catenary pole 8 direction. The detection ends of the two optical detection components 2 respectively detect the first measurement targets 3 and the first reference targets 5, and the second measurement targets 4 and the second reference targets 6. The first measurement targets 3, the second measurement targets 4, the first reference targets 5 and the second reference targets 6 are all triangular targets.
[0023] As Figure 2 shown in the figure, the optical detection component 2 includes a first area array camera 21, a second area array camera 22, a first line laser 23, a second line laser 24 and a seat body 25. The first area array camera 21, the second area array camera 22, the first line laser 23 and the second line laser 24 are all arranged on the bottom surface of the seat body 25. The top surface of the seat body 25 is installed on the bottom surface of the vehicle body 1. The first area array camera 21 and the first line laser 23 are both oriented towards the set target position direction of the catenary pole 8. The second area array camera 22 and the second line laser 24 are both oriented towards the set target position direction of the rail 7.
[0024] The first reference target 5, the second reference target 6, the first measurement target 3 and the second measurement target 4 are all targets with a cross-section of an isosceles triangle composed of two inclined planes. The ridge lines of the two inclined planes are perpendicular to the tangent of the rail 7. The ridge lines of the first reference target 5 and the second reference target 6 are both perpendicular to the ground. The angle range between the optical axis of the lens of the first area array camera 21 and the horizontal direction and the angle range between the optical axis of the lens of the first line laser 23 and the horizontal direction are both [0, 50] degrees. The angle range between the optical axis of the lens of the second area array camera 22 and the horizontal direction and the angle range between the optical axis of the lens of the second line laser 24 and the horizontal direction are both [30, 90] degrees.
[0025] As mentioned above, it is only the preferred specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and should be covered within the protection scope of the present utility model.
Claims
1. A relative position positioning device for rails and contact network poles based on point laser, characterized in that: The vehicle comprises a vehicle body (1), a pair of optical detection components (2), a plurality of first measurement targets (3), a plurality of second measurement targets (4), a plurality of first reference targets (5), a plurality of second reference targets (6), a pair of steel rails (7) and a plurality of contact network poles (8), wherein the two steel rails (7) are arranged parallel to each other on the ground, the contact network poles (8) are arranged evenly on the outside of the two steel rails (7), the first reference target (5) and the second reference target (6) are arranged on the inner side of the contact network pole (8) on different sides, respectively, the first reference target (5) and the contact network pole (8), the second reference target (6) and the contact network pole (8) are in one-to-one correspondence, the first reference target (5) and the second reference target (6) are of the same height, and the The first measurement target (3) and the second measurement target (4) are respectively and evenly arranged at the outer sides of the two steel rails (7); the two optical detection components (2) are respectively arranged at the edge positions on both sides of the bottom surface of the vehicle body (1); the vehicle body (1) moves on the steel rails (7); the working directions of each optical detection component (2) are both in the direction of the steel rails (7) and in the direction of the contact network rod (8); the detection ends of the two optical detection components (2) respectively detect the first measurement target (3) and the first reference target (5), the second measurement target (4) and the second reference target (6); the first measurement target (3), the second measurement target (4), the first reference target (5) and the second reference target (6) are all triangular targets.
2. The relative position positioning device of a rail and a contact network pole based on a point laser according to claim 1, characterized in that: The optical detection assembly (2) comprises a first area array camera (21), a second area array camera (22), a first line laser (23), a second line laser (24) and a base (25); the first area array camera (21), the second area array camera (22), the first line laser (23) and the second line laser (24) are all arranged on the bottom surface of the base (25); the top surface of the base (25) is mounted on the bottom surface of the vehicle body (1); the first area array camera (21) and the first line laser (23) are both oriented in the direction of the target position of the contact network pole (8); and the second area array camera (22) and the second line laser (24) are both oriented in the direction of the target position of the rail (7).
3. The relative position positioning device of a rail and a contact network pole based on a point laser according to claim 1, characterized in that: The first reference target (5), the second reference target (6), the first measurement target (3) and the second measurement target (4) are all targets whose cross-sections are isosceles triangles formed by two inclined surfaces, the edges of the two inclined surfaces are perpendicular to the tangent of the rail (7), and the edges of the first reference target (5) and the edges of the second reference target (6) are both perpendicular to the ground.
4. The relative position positioning device of a rail and a contact network pole based on a point laser according to claim 2, characterized in that: The angle range between the lens optical axis of the first area array camera (21) and the horizontal direction and the angle range between the lens optical axis of the first line laser (23) and the horizontal direction are both [0, 50] degrees, and the angle range between the lens optical axis of the second area array camera (22) and the horizontal direction and the angle range between the lens optical axis of the second line laser (24) and the horizontal direction are both [30, 90] degrees.