Longitudinal displacement measuring device for steel rail temperature telescopic regulator

Abstract

The utility model discloses a longitudinal displacement measuring device for a steel rail temperature telescopic regulator, which comprises steel rail scales, a graduated scale and a camera, the steel rail scales are longitudinally arranged on a rail web of a switch rail of a steel rail and close to a stock rail of the steel rail, the graduated scale is longitudinally arranged on one side of the switch rail and right faces the position of the steel rail scales, and the graduated scale is parallel to the switch rail. The camera is arranged near the steel rail, the steel rail scales, the graduated scale and the end of the stock rail are all located in the visual angle range of the camera, and in the initial state, the zero scale value of the steel rail scales is aligned with the middle scale value of the graduated scale and the end, close to the point rail, of the stock rail. According to the longitudinal displacement measuring device for the steel rail temperature telescopic regulator, the offset between the scale of the calibrated scale and the scale of the steel rail is observed through the camera to determine the longitudinal displacement of the steel rail caused by the temperature effect, so that the longitudinal displacement of the steel rail temperature telescopic regulator is measured, the structure is simple, the installation is convenient, the operation is simple, and the practicability is high. The cost is low.

Description

Technical Field

[0001] The utility model relates to a device for measuring the longitudinal displacement of a rail temperature expansion and contraction regulator, belonging to the technical field of railway monitoring. Background Art

[0002] In the field of railway monitoring, rails experience thermal expansion and contraction due to temperature fluctuations. This means that when the temperature rises, the rails extend, and when the temperature drops, the rails contract. To regulate this thermal expansion and contraction, ensuring safe and smooth railway operation, rail temperature expansion and contraction regulators are typically installed on the tracks.

[0003] Railway line repair regulations require regular monitoring of rail expansion and contraction adjuster displacement. Traditionally, monitoring of rail expansion and contraction adjuster displacement primarily utilizes controllers, displacement sensors, and other components, or a combination of infrared and imaging technologies. For example, the patent "CN201310114255.6 Dynamic Monitoring Method for the Health Status of Railway Continuous Beam Bridges and Rail Expansion and Contraction Adjusters" utilizes fiber Bragg grating (FBG) displacement sensors to continuously monitor rail creep displacement. Signals from each sensor are transmitted via optical fiber to a fiber optic splicing box for aggregation, then output to a demodulator for demodulation and sent to a data processing terminal for processing and display, enabling online dynamic monitoring. The patent "CN202222635211.5 Rail Expansion and Contraction Adjuster Displacement Monitoring Device" incorporates a distance sensor, controller, and receiving terminal. When the expansion and contraction of the rail expansion and contraction adjuster causes a change in the distance between the point rail and the stock rail, the distance sensor promptly detects this change and transmits it to the receiving terminal via the controller, enabling personnel to obtain timely information. Patent CN202311692766.6, "Rail Expansion Adjuster Monitoring System and Method," utilizes reflective markings and image recognition and temperature measurement devices to achieve image recognition and infrared temperature measurement, enabling non-contact, accurate measurement of rail expansion adjuster displacement, deformation, and temperature. Currently available measurement devices and methods, while capable of monitoring rail expansion adjuster displacement, are relatively expensive and cumbersome to operate, requiring significant time and manpower. Utility Model Content

[0004] In view of the above problems existing in the prior art, the purpose of the present invention is to provide a device for measuring the longitudinal displacement of a rail temperature expansion and contraction regulator.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A device for measuring the longitudinal displacement of a rail temperature expansion and contraction regulator comprises a rail scale, a scale ruler, and a camera. The rail scale is longitudinally arranged on the waist of the rail tip rail, near the base rail of the rail. The scale ruler is longitudinally arranged on one side of the rail tip rail, facing the rail scale, and parallel to the rail tip rail. The camera is arranged near the rail, and the rail scale, the scale ruler, and the end of the base rail are all within the camera's field of view. In an initial state, the zero scale value of the rail scale is aligned with the middle scale value of the scale ruler and the end of the base rail near the rail tip rail, respectively.

[0007] In one embodiment, the scale is detachably mounted on the roadbed at the bottom of the rail, between two adjacent sleepers for supporting the rail.

[0008] In one implementation scheme, the minimum scale value of the rail scale is 10 mm, and the minimum scale value of the ruler is 1 mm.

[0009] In one embodiment, the scale is a stainless steel scale.

[0010] In one implementation scheme, a scale mark is provided on the upper portion of the scale, and a black and white grid is provided below the scale mark, wherein the width of the grid is five times the minimum scale value of the scale.

[0011] Compared with the prior art, the beneficial technical effects of the present invention are:

[0012] The utility model provides a device for measuring the longitudinal displacement of a rail temperature expansion and contraction regulator, comprising a rail scale, a ruler and a camera. The device determines the longitudinal displacement of the rail due to temperature by observing the offset between the ruler scale and the rail scale through the camera, thereby measuring the longitudinal displacement of the rail temperature expansion and contraction regulator. The utility model has a simple structure, is easy to install, is simple to operate, is low in cost, and has significant practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the installation of a rail temperature expansion and contraction regulator longitudinal displacement measuring device provided in an embodiment of the present utility model;

[0014] Figure 2 It is a partial enlarged view of the rail scale, scale, point rail and stock rail in the embodiment of the utility model;

[0015] Figure 3 It is a schematic diagram of a scale in an embodiment of the present utility model;

[0016] Figure 4 It is a schematic diagram of the rail scale in the embodiment of the present utility model;

[0017] The numbers in the figure are as follows:

[0018] 1. Rail scale; 2. Scale; 3. Camera; 4. Point rail; 5. Stock rail; 6. Track bed; 7. Sleeper; 8. Fasteners. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in further detail below with reference to the accompanying drawings and embodiments. In addition, it should be noted that the terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Unless otherwise defined, the technical terms or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field. The directions or positional relationships indicated by the terms "inside", "outside", "upper", "lower", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "clockwise", "counterclockwise", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention. In addition, terms such as "set", "install", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be a direct connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances; the terms "first", "second", etc. are only used for descriptive purposes and can be one or more such features. In the description of this utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined; it should also be noted that when an element is referred to as "fixed on" or "set on" another element, it can be directly on the other element or there can be a central element.

[0020] Example

[0021] Combine Figures 1 to 4 As shown: The utility model provides a longitudinal displacement measuring device for a rail temperature expansion regulator, comprising a rail scale 1, a scale ruler 2, and a camera 3. The rail scale 1 is longitudinally arranged on the waist of the point rail 4 of the rail, close to the base rail 5 of the rail. The scale ruler 2 is longitudinally arranged on one side of the point rail 4, facing the rail scale 1, and the scale ruler 2 is parallel to the point rail 4. The camera 3 is arranged near the rail, and the rail scale 1, the scale ruler 2, and the ends of the base rail 5 are all within the viewing angle of the camera 3. In the initial state, the 0 scale value of the rail scale 1 is aligned with the middle scale value of the scale ruler 2 and the end of the base rail 5 close to the point rail 4.

[0022] In this embodiment, the scale 2 is detachably mounted on the ballast 6 at the bottom of the rail, between two adjacent rail sleepers 7 that support the rail. The rails (point rail 4, stock rail 5), ballast 6, and sleepers 7 are all part of the track, and their installation can be performed using existing track installation technology.

[0023] The scale 2 can be mounted on the track bed 6 at the bottom of the rail using existing detachable mounting techniques. For example, it can be detachably mounted on the track bed 6 using fasteners 8 (e.g., nuts). Specifically, mounting holes (not shown) are provided at each end of the scale 2. During installation, the fasteners 8 pass through the mounting holes to secure the scale 2 to the track bed 6 at the bottom of the rail. The fasteners 8 prevent the scale 2 from shifting or falling off. Furthermore, the detachable mounting method facilitates the removal, assembly, and replacement of the scale 2. If the scale 2 is damaged due to environmental factors, stress, or other factors, the fasteners 8 can be removed and a new scale 2 can be promptly replaced to monitor rail deflection, ensuring the safe operation of high-speed trains.

[0024] In this embodiment, see Figure 4 As shown, the minimum scale value of the rail scale 1 is 10 mm. Specifically, the rail scale 1 has a total of 120 small grids, 60 positive and negative small grids, and one small grid is 10 mm. That is, the scale range of the rail scale 1 is -600 mm to 600 mm, and the total length of the rail scale 1 is 120 cm.

[0025] See also Figure 3 As shown, the minimum scale value of the scale ruler 2 is 1 mm. Specifically, the scale range of the scale ruler 2 is 0 cm to 30 cm, each 1 cm is a large grid, a large grid includes 10 small grids, and a small grid is 1 mm.

[0026] In this embodiment, the scale 2 is a stainless steel scale, which can be customized directly from the manufacturer. The stainless steel scale has good anti-rust properties, can resist moisture and corrosion, has a long service life, and is not easy to rust; in addition, the stainless steel scale has a high hardness, is not easy to bend or deform, and ensures the accuracy of the measurement. The upper part of the scale 2 is provided with a scale mark, and the bottom of the scale mark is provided with a black and white grid, and the width of the grid is five times the minimum scale value of the scale 2. When the minimum scale value of the scale 2 is 1mm, the width of each grid in the black and white grid is 5mm. The black and white grid makes the scale 2 more visually eye-catching. When installing, refer to Figure 1 and Figure 3 As shown, the scale 2 has a side with scale marks (i.e. Figure 3 The upper side of the rail) faces the rail scale 1, and the side with black and white grid (i.e. Figure 3 the lower side of the rail) toward the outside of the rail.

[0027] The working principle of the rail temperature expansion and contraction regulator longitudinal displacement measuring device described in the utility model is as follows:

[0028] During installation: set the rail scale 1 on the waist of the rail point 4, wherein the 0 scale value of the rail scale 1 is aligned with the end of the base rail 5 close to the rail point 4 (such as Figure 2 Place the ruler 2 longitudinally on one side of the switch rail 4 (the distance between the ruler 2 and the switch rail 4 can be set to 20 cm), and the ruler 2 is parallel to the switch rail 4, so that the scale 1 of the rail is flush with the scale 2, and the 0 scale value of the rail scale 1 is aligned with the middle scale value of the ruler 2 (as shown). Figure 2 As shown), in order to facilitate monitoring of the longitudinal displacement of the rail (in this embodiment, Figure 4 The 0 scale value of the rail scale 1 shown in Figure 3 ), after adjustment, fix the scale 2 to the track bed 6 with the fasteners 8; install the camera 3 near the rail (specifically, on the outside of the track bed 6), and adjust the angle of the camera 3 so that the rail scale 1, the scale 2, and the end of the stock rail 5 are all within the viewing angle of the camera 3; the measuring device is thus installed on the track;

[0029] During track operation, when the temperature drops, the basic rail 5 of the rail shrinks and the basic rail 5 moves Figure 4 As shown in the figure, the 0 scale line in the rail scale 1 is offset to the right. Since the 0 scale value of the rail scale 1 is aligned with the number 15 on the scale 2, the end of the basic rail 5 is offset to between 15 and 30 on the scale 2. During this process, the camera 3 takes pictures of the rail scale 1, the scale 2, and the end of the basic rail 5 in real time. The offset of the basic rail 5 is calculated based on the pictures taken. The offset of the basic rail 5 is the longitudinal displacement of the rail temperature expansion regulator. The specific calculation method is: first observe the end of the basic rail 5 corresponding to the scale line number on the rail scale 1, that is, the distance from the basic rail 5 to the scale line. The number on the rail scale 1 closest to the end of rail 5 is recorded as x1. Next, determine the scale line on scale 2 that corresponds to number x1, and record the number at that scale line as y1. Next, determine the integer number of grids between the end of base rail 5 and y1, which is z1 (0≤z1≤1). Then, observe the distance from the end of base rail 5 to the last integer grid, which is c1 (0≤c1≤5mm). Finally, calculate the offset of steel base rail 5 based on the longitudinal displacement = (x1+5z1+c1) mm, which is the longitudinal displacement of the rail temperature expansion regulator.

[0030] Similarly, when the temperature rises, the basic rail 5 of the rail stretches and the basic rail 5 of the rail moves towards Figure 4As shown in the figure, the left side of the 0 scale line in the rail scale 1 is offset. When the end of the basic rail 5 is offset to between 0 and 15 on the scale 2, the camera 3 takes photos of the rail scale 1, the scale 2, and the end of the basic rail 5 in real time, and calculates the offset of the basic rail 5 based on the photos taken. Specifically, the end of the basic rail 5 is observed to correspond to the scale line number on the rail scale 1, and the number is recorded as x2; then the number x2 is determined to correspond to the scale line on the scale 2, and the number where the scale line is located is recorded as y2; then the number of integer grids between the end of the basic rail 5 and y2 is determined, and the number of grids is z2 (0≤z2≤1); then the distance between the end of the basic rail 5 and the last integer grid is observed as c2 (0≤c2≤5mm); finally, according to the longitudinal displacement = -(x2+5z2+c2) mm, the offset of the steel basic rail 5 is calculated, which is the longitudinal displacement of the rail temperature expansion regulator;

[0031] As can be seen from the above, the measuring device of the present invention is provided with a rail scale 1, a ruler 2 and a camera 3. The offset between the scale of the ruler 2 and the rail scale 1 can be observed by the camera 3 to determine the longitudinal displacement of the rail caused by the temperature, thereby measuring the longitudinal displacement of the rail temperature expansion regulator. Compared with traditional measuring devices and methods, the measuring device does not require expensive instruments, has low cost, is easy to install and simple to operate.

[0032] Finally, it is necessary to point out that the above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A device for measuring the longitudinal displacement of a rail temperature expansion and contraction regulator, characterized in that: The invention comprises a rail scale, a ruler and a camera. The rail scale is longitudinally arranged on the waist of the point rail of the rail, close to the base rail of the rail. The ruler is longitudinally arranged on one side of the point rail, facing the position of the rail scale, and the ruler and the point rail are parallel. The camera is arranged near the rail. The rail scale, the ruler and the end of the base rail are all within the viewing angle of the camera. In the initial state, the 0 scale value of the rail scale is aligned with the middle scale value of the ruler and the end of the base rail close to the point rail.

2. The rail temperature expansion and contraction regulator longitudinal displacement measuring device according to claim 1, characterized in that: The scale is detachably mounted on the roadbed at the bottom of the rail and is located between two adjacent sleepers for supporting the rail.

3. The rail temperature expansion and contraction regulator longitudinal displacement measuring device according to claim 1, characterized in that: The minimum scale value of the rail scale is 10 mm, and the minimum scale value of the ruler is 1 mm.

4. The rail temperature expansion and contraction regulator longitudinal displacement measuring device according to claim 1, characterized in that: The scale is a stainless steel scale.

5. The rail temperature expansion and contraction regulator longitudinal displacement measuring device according to claim 1, characterized in that: A scale mark is provided on the upper part of the scale ruler, and a black and white grid is provided below the scale mark, and the width of the grid is five times the minimum scale value of the scale ruler.

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