Vehicle-mounted seamless track steel rail displacement detection device based on plane target

Abstract

The utility model discloses a vehicle-mounted seamless track steel rail displacement detection device based on a plane target, which comprises a vehicle body, an optical detection assembly, a first measurement target, a second measurement target, a reference target, steel rails and a contact net rod, the steel rails are arranged on the ground in parallel, the contact net rod is arranged on the outer side of the steel rails, and the contact net rod is arranged along the longitudinal direction of the steel rails. Adjacent catenary rods are equidistant in the longitudinal direction of a steel rail, the reference targets are arranged on the inner side faces of the catenary rods, the number of the reference targets corresponds to that of the catenary rods, the measuring targets are evenly arranged on the outer side of the rail web position of the steel rail, and the optical measuring assemblies are arranged on the edges of the two sides of the bottom face of a vehicle body. The working directions of the optical measurement assemblies are the direction of the steel rail and the direction of the overhead line system. The measuring assembly is small in size, small in installation space requirement, high in adaptability, easy to install and suitable for most vehicle types.

Description

Technical Field

[0001] The utility model relates to the field of railway detection, in particular to a vehicle-mounted seamless line rail displacement detection device based on a planar target. Background Technique

[0002] In China, high-speed railways generally adopt seamless lines. This method has no rail joints, greatly reducing vibration and effectively improving the track structure. However, due to the absence of rail gaps, the rails cannot freely expand and contract when the temperature changes, resulting in large temperature stresses inside the rails. When the fastener pressure is insufficient to offset the temperature stress, the rails will undergo longitudinal displacement. When the temperature rises, it is easy to cause rail buckling and track creep, 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 rails are: the manual wire-pulling method with displacement observation piles, observing the longitudinal displacement of rails with optical instruments, establishing a non-linear mechanical equation set of rails to solve the distribution and displacement of longitudinal forces of rails, and measuring the longitudinal displacement of rails with lasers, 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 rail creep displacement based on machine vision have been successively proposed, but these all require detecting devices to be buried on both sides of the road shoulder of the track. This method has a high cost and great difficulty in manual maintenance. The detection positions are relatively fixed. When measurements are needed at other positions on the line, the detection devices need to be reinstalled, and there are certain risks in installation and on-site measurement.

[0005] In railway maintenance sites, the rail creep is mainly detected by the observation piles buried on both sides of the line. The position deviation of the rail marking points relative to the observation piles is observed through observation tools, and the rail creep amount of a certain line section at a certain time 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 line 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 3 - 4 people operate together to complete the operation, having the disadvantages of high input cost, low efficiency, and high labor intensity, etc. Moreover, the buried displacement observation piles are easy to move and there are too many human factors, resulting in low measurement accuracy. Although the existing laser measurement method for the longitudinal displacement of 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.

[0007] Now, a vehicle-mounted seamless track rail displacement detection device based on a planar target is required to solve the above problems. Summary of the Invention

[0008] The present invention is to solve the problems in the prior art that 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 to measure; 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 present invention provides a vehicle-mounted seamless track rail displacement detection device based on a planar target, which solves the problems in the prior art.

[0009] The present invention provides a vehicle-mounted seamless track rail displacement detection device based on a planar target, including a vehicle body, a pair of optical detection components, a plurality of first measurement targets, a plurality of second measurement targets, a reference target, a pair of rails and a plurality of catenary poles. The two rails are arranged parallel to each other on the ground, the catenary poles are arranged outside the rails, the catenary poles are arranged longitudinally along the rails, and adjacent catenary poles are equidistant in the longitudinal direction of the rails. The reference target is arranged on the inner side surface of the catenary pole, and the number of reference targets corresponds to that of the catenary poles. The first measurement targets and the second measurement targets are respectively and uniformly arranged outside the positions of the two rail webs. 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 two optical measurement components are both in the two directions of the rail orientation and the catenary orientation. The detection ends of the two optical measurement components respectively detect the first measurement target and the reference target on the same side, the second measurement target and the reference target on the same side. The first measurement target, the second measurement target and the reference target are all planar targets. The first measurement target and the second measurement target are installed on the rails by using hoop clamps, and the reference target is installed on the catenary pole by using hoop clamps.

[0010] In a preferred embodiment of the vehicle-mounted seamless track rail displacement detection device based on a planar target according to the present invention, the optical detection component includes a first area array camera, a second area array camera and a seat body. The first area array camera and the second area array camera are both 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 faces the direction of the target position of the catenary pole on the outer side of the vehicle body, and the second area array camera is arranged to face the direction of the target position of the rail on the same side as the second area array camera.

[0011] In a preferred embodiment of the vehicle-mounted seamless track rail displacement detection device based on a planar target according to the present invention, dot matrix patterns are arranged on the target planes of the reference target, the first measurement target and the second measurement target, and the dot matrix patterns are circular dot matrices or square dot matrices.

[0012] A vehicle-mounted seamless line rail displacement detection device based on a planar target, as a preferred mode, the included angle range between the optical axis of the lens of the first area array camera and the horizontal direction is [0, 70] degrees, and the included angle range between the optical axis of the lens of the second area array camera and the horizontal direction is [30, 90] degrees.

[0013] A vehicle-mounted seamless line rail displacement detection device based on a planar target, as a preferred mode, both the number of rows and the number of columns of the dot matrix pattern are 3 to 10.

[0014] A vehicle-mounted seamless line rail displacement detection device based on a planar target, as a preferred mode, the diameter of the circular dots of the dot matrix pattern is 10 to 100 mm or the side length of the square dots is 10 to 100 mm.

[0015] A vehicle-mounted seamless line rail displacement detection device based on a planar target, as a preferred mode, both the first detection target and the second detection target are provided with backlights.

[0016] The beneficial effects of the present utility model are as follows:

[0017] (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;

[0018] (2) Both the rail web and the catenary pole targets adopt the installation method of hoop buckles, which is convenient and firm to install, and maximally ensures the stability of the measurement structure on the premise of not affecting the train operation safety and line maintenance;

[0019] (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

[0020] Figure 1 It is a schematic diagram of a vehicle-mounted seamless line rail displacement detection device based on a planar target;

[0021] Figure 2 It is a schematic diagram of the optical detection component of a vehicle-mounted seamless line rail displacement detection device based on a planar target.

[0022] Reference Signs:

[0023] 1, vehicle body; 2, optical detection component; 21, first area array camera; 22, second area array camera; 23, seat body; 3, first measurement target; 4, second measurement target; 5, reference target; 6, rail; 7, catenary pole. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Embodiment 1

[0026] As Figure 1 shown, a vehicle-mounted seamless line rail displacement detection device based on a planar target includes 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 reference target 5, a pair of rails 6, and a plurality of catenary poles 7. The two rails 6 are arranged parallel to each other on the ground. The catenary poles 7 are arranged outside the rails 6 and longitudinally along the rails 6. Adjacent catenary poles 7 are equidistant in the longitudinal direction of the rails 6. The reference target 5 is arranged on the inner side surface of the catenary pole 7, and the number of reference targets 5 corresponds to that of the catenary poles 7. The first measurement targets 3 and the second measurement targets 4 are respectively and uniformly arranged outside the waist positions of the two rails 6. The two optical detection components 2 are respectively arranged at both side edge positions of the bottom surface of the vehicle body 1. The vehicle body 1 moves on the rails 6. The working orientations of the optical detection components 2 are both in the directions of the rails 6 and the catenary poles. The detection ends of the two optical detection components 2 respectively detect the first measurement target 3 and the reference target 5 on the same side, the second measurement target 4 and the reference target 5 on the same side. The first measurement target 3, the second measurement target 4, and the reference target 5 are all planar targets.

[0027] As Figure 2 shown, the optical detection component 2 includes a first area array camera 21, a second area array camera 22, and a seat body 23. The first area array camera 21 and the second area array camera 22 are both arranged on the bottom surface of the seat body 23. The top surface of the seat body 23 is installed on the bottom surface of the vehicle body 1. The first area array camera 21 faces the direction of the set target position of the catenary pole 7 outside the vehicle body 1, and the second area array camera 22 is arranged to face the direction of the set target position of the rail 6 on the same side as the second area array camera 22.

[0028] Dot matrix patterns are arranged on the target plane of the reference target 5, the target plane of the first measurement target 3, and the target plane of the second measurement target 4. The dot matrix pattern is a circular dot matrix or a square dot matrix. The included angle range between the optical axis of the lens of the first area array camera 21 and the horizontal direction is [0, 70] degrees, and the included angle range between the optical axis of the lens of the second area array camera 22 and the horizontal direction is [30, 90] degrees. The number of rows and columns of the dot matrix pattern is 3 to 10. The diameter of the circular dots of the dot matrix pattern is 10 to 100 mm or the side length of the square dots is 10 to 100 mm.

[0029] The above are only the preferred specific embodiments 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 substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A vehicle-mounted seamless track rail displacement detection device based on a planar target, characterized in that: The invention 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 reference target (5), a pair of steel rails (6) and a plurality of contact network rods (7), wherein the two steel rails (6) are arranged parallel to each other on the ground, the contact network rods (7) are arranged outside the steel rails (6), the contact network rods (7) are arranged along the longitudinal direction of the steel rails (6), adjacent contact network rods (7) are equidistant in the longitudinal direction of the steel rails (6), the reference targets (5) are arranged on the inner side of the contact network rods (7), the number of the reference targets (5) corresponds to the number of the contact network rods (7), the first measurement targets (3) and the second measurement targets (4) are evenly arranged outside the waist positions of the two steel rails (6), the two optical detection components (2) are arranged on the outer side of the two steel rails (6), and the contact network rods (7) are arranged on the outer side of the two steel rails (6). The 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 rail (6); the working directions of each of the optical detection components (2) are both the steel rail (6) direction and the contact network pole direction; the detection ends of the two optical detection components (2) respectively detect the first measurement target (3) and the reference target (5) on the same side, and the second measurement target (4) and the reference target (5) on the same side; the first measurement target (3), the second measurement target (4) and the reference target (5) are all plane targets; the first measurement target (3) and the second measurement target (4) are mounted on the steel rail (6) by means of a clamp, and the reference target (5) is mounted on the contact network pole (7) by means of a clamp.

2. The vehicle-mounted seamless railway rail displacement detection device based on a plane target according to claim 1 is characterized in that: The optical detection assembly (2) comprises a first area array camera (21), a second area array camera (22) and a base (23); the first area array camera (21) and the second area array camera (22) are both arranged on the bottom surface of the base (23); the top surface of the base (23) is mounted on the bottom surface of the vehicle body (1); the first area array camera (21) faces the direction of the target position of the contact network rod (7) in the direction of the outside of the vehicle body (1); and the second area array camera (22) faces the direction of the target position of the rail (6) on the same side as the second area array camera (22).

3. The vehicle-mounted seamless railway rail displacement detection device based on a plane target according to claim 1 is characterized in that: A dot matrix pattern is arranged on the target plane of the reference target (5), the target plane of the first measurement target (3) and the target plane of the second measurement target (4), and the dot matrix pattern is a circular dot matrix or a square dot matrix.

4. The vehicle-mounted seamless railway rail displacement detection device based on a plane target according to claim 2 is characterized in that: The angle range between the lens optical axis of the first area array camera (21) and the horizontal direction is [0, 70] degrees, and the angle range between the lens optical axis of the second area array camera (22) and the horizontal direction is [30, 90] degrees.

5. The vehicle-mounted seamless railway rail displacement detection device based on a plane target according to claim 3 is characterized in that: The number of rows and columns of the dot matrix pattern are both 3 to 10.

6. The vehicle-mounted seamless railway rail displacement detection device based on a plane target according to claim 5 is characterized in that: The diameter of the circular dots of the dot matrix pattern is 10 to 100 mm or the side length of the square dots is 10 to 100 mm.

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