Calibration tool of track inspection equipment

Abstract

The utility model relates to a calibration tool for track inspection equipment. The calibration tool comprises a base, a speed detection mechanism, a clamping mechanism and an offset detection mechanism, the speed detection mechanism comprises a first sliding rail and a speed sensor arranged on the first sliding rail, the first sliding rail is arranged on the base, the first sliding rail is used for allowing the track inspection equipment to slide, and the speed sensor is used for detecting the sliding speed of the track inspection equipment; the two offset detection mechanisms are arranged at the two ends of the track inspection equipment in the first direction correspondingly. The offset detection mechanism comprises a displacement sensor, the displacement sensor is used for detecting the offset of the track inspection equipment in the second direction, and every two of the second direction, the first direction and the length direction of the first sliding rail are perpendicular to each other. Compared with an existing calibration mode of manually operating a basic instrument, the calibration tool of the track inspection equipment has the advantages that the influence of factors such as the skill level and experience of operators, the state during operation and the like on the precision of a calibration result is reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of rail transit technology, and in particular to a calibration fixture for a rail inspection device. Background Technology

[0002] Track inspection equipment is a specialized device or system used for the inspection, monitoring, and maintenance of rail transit infrastructure (such as the track systems of railways, subways, and trams). Through automated or semi-automated methods, it periodically inspects key components such as tracks, overhead contact lines, signaling equipment, and roadbeds to identify potential defects, wear, or safety hazards, thereby ensuring the safety and stability of train operations.

[0003] When using track inspection equipment, it is necessary to manually operate basic instruments to calibrate and verify the accuracy of the equipment, thereby ensuring its accuracy and reliability. For example, the movement distance and corresponding time of the track inspection equipment are manually measured to calculate its movement rate, or the height change of the equipment during movement is manually measured to determine whether the equipment is swaying up and down during movement.

[0004] However, the accuracy of calibration results is affected by factors such as the operator's skill level, experience, and state of mind during the operation, as well as the manual operation method used for basic instrument calibration. Moreover, manual operation is inefficient. Utility Model Content

[0005] Therefore, it is necessary to provide a calibration fixture for track inspection equipment to address the issues of calibration and accuracy verification.

[0006] A calibration fixture for track inspection equipment, the calibration fixture for track inspection equipment comprising:

[0007] Base;

[0008] A speed detection mechanism includes a first slide rail and a speed sensor mounted on the first slide rail. The first slide rail is mounted on the base and is used for sliding of the track inspection equipment. The speed sensor is used to detect the sliding speed of the track inspection equipment.

[0009] Two offset detection mechanisms are respectively set at both ends of the track inspection equipment along the first direction; the offset detection mechanism includes a displacement sensor, which is used to detect the offset of the track inspection equipment along the second direction, wherein the second direction, the first direction and the length direction of the first slide rail are perpendicular to each other.

[0010] In one embodiment, a clamping mechanism is also included, which includes two clamping plates and a driving member. The driving member can drive at least one of the clamping plates to move, so that the two clamping plates move toward each other to clamp or release the track inspection device. Each clamping plate is provided with the displacement sensor.

[0011] In one embodiment, the drive element is connected to one of the clamps via a lead screw structure.

[0012] In one embodiment, the clamping mechanism further includes a fixing frame that is slidably connected to the base, and the fixing frame is provided with a cavity to accommodate the lead screw structure.

[0013] In one embodiment, the calibration fixture of the track inspection equipment further includes a clamping mechanism for clamping the track inspection equipment;

[0014] The offset detection mechanism further includes a pressure sensor. The end of the clamping mechanism along the first direction is slidably connected to the base via the pressure sensor. The pressure sensor is used to detect the pressure change value at the end of the clamping mechanism in order to calculate the offset of the track inspection equipment along the second direction.

[0015] In one embodiment, the offset detection mechanism further includes:

[0016] A support base is slidably connected to the base, and the support base is provided with a through cavity, and the pressure sensor is disposed on the cavity wall of the through cavity;

[0017] A support rod, one end of which extends into the through cavity, and the other end of which is located outside the through cavity and connected to the clamping mechanism, wherein the length direction of the support rod is parallel to the second direction;

[0018] An elastic element is sleeved on the support rod and located between the pressure sensor and the inner bottom wall of the through cavity. The pressure sensor is used to detect the elastic force of the elastic element.

[0019] In one embodiment, the offset detection mechanism further includes a synchronization plate disposed within the penetration cavity, the synchronization plate being connected to the end of the support rod away from the clamping mechanism, and the size of the synchronization plate being larger than the size of the outlet of the penetration cavity.

[0020] In one embodiment, the support base includes a slide, a storage base, and a limiting base connected in sequence. The slide is slidably engaged with the base. The limiting base has a first channel, and the storage base has a second channel. The first channel and the second channel are connected to form the through cavity. The pressure sensor is disposed in the first channel.

[0021] In one embodiment, the speed detection mechanism further includes a connecting plate, and two first slide rails are provided, which are connected by the connecting plate. The speed sensor is provided on the opposite side of each of the two first slide rails.

[0022] In one embodiment, the speed detection mechanism is provided with the offset detection mechanism on both sides along the first direction.

[0023] The calibration fixture for the aforementioned track inspection equipment includes a speed detection mechanism mounted on a base. A first slide rail of the speed detection mechanism is placed on the base, and a speed sensor is mounted on the first slide rail. When the track inspection equipment slides along the first slide rail, the speed sensor detects the actual sliding speed of the equipment. If the actual sliding speed differs from the preset sliding speed, the sliding speed of the equipment is adjusted accordingly. Furthermore, by installing offset detection components at both ends of the track inspection equipment along the first direction, when the equipment shakes, a displacement sensor detects the movement of the equipment along the second direction, thus obtaining the offset of the equipment along the second direction.

[0024] This application calibrates the speed of the track inspection equipment by setting a speed detection component, and calibrates the offset of the track inspection equipment along a second direction by setting an offset detection component. Compared with the existing method of manually operating basic instruments for calibration, the calibration fixture of the track inspection equipment in this application reduces the impact of factors such as the operator's skill level, experience, and state during operation on the accuracy of the calibration results, and also improves the operating efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the calibration fixture for the track inspection equipment provided in the embodiments of this application.

[0026] Figure 2 This is a schematic diagram of the clamping mechanism provided in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the offset detection mechanism provided in an embodiment of this application.

[0028] Figure label:

[0029] 100. Base; 110. Second slide rail;

[0030] 200. Speed ​​detection mechanism; 210. First slide rail; 220. Speed ​​sensor; 230. Connecting plate;

[0031] 300. Offset detection mechanism; 310. Displacement sensor; 320. Pressure sensor; 330. Support base; 331. Slide base; 332. Storage base; 3321. Second channel; 333. Limiting seat; 3331. First channel; 334. Through cavity; 340. Support rod; 350. Elastic element; 360. Synchronization plate;

[0032] 400 Clamping mechanism; 410 Clamping plate; 420 Driving component; 430 Screw structure; 440 Fixing frame. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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 this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] This application provides a calibration fixture for track inspection equipment, such as... Figures 1 to 3 As shown, the calibration fixture for the track inspection equipment includes: a base 100, a speed detection mechanism 200, and two offset detection mechanisms 300. The speed detection mechanism 200 includes a first slide rail 210 and a speed sensor 220 mounted on the first slide rail 210. The first slide rail 210 is mounted on the base 100 and is used for sliding of the track inspection equipment. The speed sensor 220 is used to detect the sliding speed of the track inspection equipment. The two offset detection mechanisms 300 are respectively mounted at both ends of the track inspection equipment along a first direction. The offset detection mechanism 300 includes a displacement sensor 310, which is used to detect the offset of the track inspection equipment along a second direction. The second direction, the first direction, and the length direction of the first slide rail 210 are perpendicular to each other.

[0040] The calibration fixture for the aforementioned track inspection equipment includes a speed detection mechanism 200 mounted on a base 100. A first slide rail 210 of the speed detection mechanism 200 is placed on the base 100, and a speed sensor 220 is mounted on the first slide rail 210. When the track inspection equipment slides along the first slide rail 210, the speed sensor 220 detects the actual sliding speed of the track inspection equipment. If the actual sliding speed of the track inspection equipment does not match the preset sliding speed, the sliding speed of the track inspection equipment is adjusted accordingly. Furthermore, by setting offset detection mechanisms 300 at both ends of the track inspection equipment along the first direction, when the track inspection equipment shakes, the displacement sensor 310 detects the movement value of the track inspection equipment along the second direction, thus obtaining the offset of the track inspection equipment along the second direction.

[0041] This application calibrates the speed of the track inspection equipment by setting a speed detection mechanism 200, and calibrates the offset of the track inspection equipment along a second direction by setting an offset detection mechanism 300. Compared with the existing method of manually operating basic instruments for calibration, the calibration fixture of the track inspection equipment in this application reduces the impact of factors such as the operator's skill level, experience, and state during operation on the accuracy of the calibration results, and also improves the operating efficiency.

[0042] It should be noted that the speed sensor 220 is used to detect the moving speed of the track inspection equipment. For example, the speed sensor 220 can be a photoelectric speed sensor 220, a Hall speed sensor 220, a magnetoelectric speed sensor 220, an ultrasonic speed sensor 220, or a laser Doppler speed sensor 220.

[0043] In this embodiment, the displacement sensor 310 is used to detect the moving distance of the track inspection equipment. For example, the displacement sensor 310 can be an infrared sensor, a resistive displacement sensor 310, a capacitive displacement sensor 310, an inductive displacement sensor 310, a photoelectric displacement sensor 310, or an ultrasonic displacement sensor 310.

[0044] In this embodiment, the length direction of the first slide rail 210 is parallel to the length direction of the base 100, the first direction is parallel to the width direction of the base 100, and the second direction is parallel to the height direction of the base.

[0045] In one embodiment, such as Figure 1 and Figure 3As shown, the calibration fixture for the track inspection equipment also includes a clamping mechanism 400. The clamping mechanism 400 includes two clamping plates 410 and a driving member 420. The driving member 420 can drive at least one clamping plate 410 to move, causing the two clamping plates 410 to move towards each other to clamp or release the track inspection equipment. Each clamping plate 410 is equipped with a displacement sensor 310. By setting two clamping plates 410 and driving the clamping plates 410 to move via the driving member 420, the two clamping plates 410 can clamp or release the track inspection equipment. During calibration testing, the driving member 420 drives the clamping plates 410 to move to clamp the track inspection equipment; after calibration testing is completed, the driving member 420 drives the clamping plates 410 to move to release the track inspection equipment. The multiple displacement sensors 310 working together further improve calibration accuracy.

[0046] In one example, the output of the drive unit 420 is connected to two clamping plates 410, and by driving the two clamping plates 410 to move synchronously, the two clamping plates 410 move towards each other.

[0047] In one example, the output of the drive unit 420 is connected to one of the clamps 410, and by driving the clamp 410 to move, the two clamps 410 move toward each other.

[0048] For example, in this embodiment, such as Figure 1 and Figure 3 As shown, the drive member 420 is connected to one of the clamping plates 410 via a lead screw structure 430. The lead screw structure 430 includes a threaded lead screw and a nut. The lead screw is connected to the output end of the drive member 420, and the nut is connected to one of the clamping plates 410. The drive member 420 drives the lead screw to rotate, thereby causing the nut to move along the axial direction of the lead screw, which in turn drives the clamping plate 410 to move along the axial direction of the lead screw, so as to move closer to or away from the other clamping plate 410.

[0049] In this embodiment, as Figure 1 and Figure 3 As shown, the axial direction of the lead screw in the lead screw structure 430 is parallel to the first direction.

[0050] In one embodiment, such as Figure 1 and Figure 3As shown, the clamping mechanism 400 also includes a fixed frame 440, which is slidably connected to the base 100. The fixed frame 440 has a cavity for accommodating the lead screw structure 430. By setting the fixed frame 440, the lead screw structure 430 is located in the cavity of the fixed frame 440 and rotates with the fixed frame 440, thereby connecting the driving member 420 to the fixed frame 440 for easy fixation of the driving member 420. The fixed frame 440 is slidably connected to the base 100 at both ends along the first direction, so that the clamping mechanism 400 can slide with the track inspection equipment, thereby detecting and calibrating the offset of the track inspection equipment along the second direction when the track inspection equipment slides along the first slide rail 210.

[0051] In this embodiment, as Figure 1 and Figure 3 As shown, a portion of the clamping plate 410 connected to the lead screw structure 430 extends into the cavity of the fixing frame 440 and is connected to the nut of the lead screw structure 430.

[0052] Furthermore, the offset detection mechanism 300 also includes a pressure sensor 320. The end of the clamping mechanism 400 along the first direction is slidably connected to the base 100 via the pressure sensor 320. The pressure sensor 320 is used to detect the pressure change value at the end of the clamping mechanism 400 in order to calculate the offset of the track inspection equipment along the second direction.

[0053] By setting a pressure sensor 320, the end of the fixing frame 440 of the clamping mechanism 400 is slidably connected to the base 100. When the track inspection equipment deviates and shakes, it will cause the clamping mechanism 400 to deviate and shake as well. At this time, the pressure at the end of the fixing frame 440 of the clamping mechanism 400 will change. The pressure sensor detects the pressure change at the end of the fixing frame 440, and then calculates the amount of deviation of the track inspection equipment along the second direction. In this application, the deviation detection mechanism 300, the detection data of the displacement sensor 310, and the detection data of the pressure sensor 320 work together to further improve the calibration accuracy.

[0054] In one embodiment, such as Figure 1 and Figure 2 As shown, the offset detection mechanism 300 further includes: a support base 330, a support rod 340, and an elastic element 350. The support base 330 is slidably connected to the base 100. A through cavity 334 is provided on the support base 330, and a pressure sensor 320 is disposed on the cavity wall of the through cavity 334. One end of the support rod 340 extends into the through cavity 334, and the other end is disposed outside the through cavity 334 and connected to the clamping mechanism 400. The length direction of the support rod 340 is parallel to the second direction. The elastic element 350 is sleeved on the support rod 340 and is located between the pressure sensor 320 and the inner bottom wall of the through cavity 334. The pressure sensor 320 is used to detect the elastic force of the elastic element 350.

[0055] One end of the support rod 340 is connected to the end of the clamping mechanism 400 along the first direction, and the other end of the support rod 340 extends into the through cavity 334 of the support base 330. When the track inspection equipment shakes, it will shift along the second direction, and the size of the support rod 340 extending into the through cavity 334 will change. For example, when one end of the track inspection equipment shifts along the second direction towards the side closer to the base 100 (i.e., when...) Figure 1 As shown, when the track inspection device shifts downwards along the second direction, it will cause the clamping mechanism 400 to shift towards the side closer to the base 100 along the second direction, thereby increasing the size of the support rod 340 extending into the through cavity 334. Conversely, when one end of the track inspection device shifts away from the base 100 along the second direction (i.e., as shown), it will shift downwards along the second direction. Figure 1 As shown, the track inspection equipment will drive the clamping mechanism 400 to shift away from the base 100 along the second direction, thereby reducing the size of the support rod 340 extending into the through cavity 334.

[0056] An elastic element 350 is sleeved on the support rod 340, and the elastic element 350 is located between the pressure sensor 320 and the inner bottom wall of the penetration cavity 334. As the support rod 340 extends into or out of the penetration cavity 334 in the second direction, the elastic force of the elastic element 350 changes. For example, when the support rod 340 exits the penetration cavity 334, the elastic element 350 is compressed, and the pressure of the elastic element 350 against the pressure sensor 320 increases. When the support rod 340 extends into the penetration cavity 334, the elastic element 350 extends, and the pressure of the elastic element 350 against the pressure sensor 320 decreases. By detecting the change in the elastic force of the elastic element 350 through the pressure sensor 320, the dimensional change of the support rod 340 extending into or out of the penetration cavity 334 can be calculated, thus measuring the offset dimension of the clamping mechanism 400 and the track inspection equipment in the second direction.

[0057] In addition, the clamping mechanism 400 of this application has a fixed frame 440 that is slidably connected to the base 100 via a support seat 330. It can detect the offset dimension of the track inspection equipment in the second direction when the track inspection equipment slides along the first slide rail 210. That is, when calibrating the sliding speed of the track inspection equipment, the offset of the track inspection equipment in the second direction is calibrated simultaneously.

[0058] It should be noted that this application provides a set of offset detection mechanisms 300 at both ends of the clamping mechanism 400 along the first direction, that is, the track inspection equipment is provided with corresponding offset detection mechanisms 300 at both ends along the first direction, so as to facilitate the calibration of the offset of the two ends of the track inspection equipment along the second direction.

[0059] In this embodiment, the elastic element 350 is a spring.

[0060] In one embodiment, such as Figure 2 As shown, the offset detection mechanism 300 also includes a synchronization plate 360 ​​disposed within the penetration cavity 334. The synchronization plate 360 ​​is connected to the end of the support rod 340 facing away from the clamping mechanism 400, and the size of the synchronization plate 360 ​​is larger than the size of the outlet of the penetration cavity 334. By setting the synchronization plate 360, which is slidably disposed within the penetration cavity 334, and making the size of the synchronization plate 360 ​​larger than the size of the outlet of the penetration cavity 334, the synchronization plate 360 ​​is prevented from sliding out of the penetration cavity 334, thus preventing the support rod 340 from disengaging from the penetration cavity 334.

[0061] In one embodiment, such as Figure 2 As shown, the support base 330 includes a slide 331, a storage base 332, and a limiting base 333 connected in sequence. The slide 331 is slidably engaged with the base 100. The limiting base 333 has a first channel 3331, and the storage base 332 has a second channel 3321. The first channel 3331 and the second channel 3321 communicate to form a through cavity 334. The pressure sensor 320 is disposed in the first channel 3331. By setting the slide 331, the slide 331 is slidably engaged with the base 100, thereby allowing the clamping mechanism 400 and the offset detection mechanism 300 to slide synchronously with the track inspection equipment. By setting the first channel 3331 on the limiting base 333 and the second channel 3321 on the storage base 332, the first channel 3331 and the second channel 3321 together constitute the through cavity 334, which facilitates the accommodation of the support rod 340. Furthermore, a pressure sensor 320 is installed in the first channel 3331, that is, a pressure sensor 320 is installed at a position near the outlet of the support 330.

[0062] In this embodiment, as Figure 2 As shown, the first channel 3331 is connected to the outside world.

[0063] In this embodiment, as Figure 2 As shown, a second slide rail 110 parallel to the first slide rail 210 is provided on the base 100, and the slide block 331 is slidably connected to the second slide rail 110.

[0064] In one embodiment, such as Figure 1 As shown, the speed detection mechanism 200 also includes a connecting plate 230. Two first slide rails 210 are provided, connected by the connecting plate 230. Speed ​​sensors 220 are provided on the opposite sides of each of the two first slide rails 210. The connecting plate 230 connects the two first slide rails 210, preventing relative movement between them. The presence of speed sensors 220 on the opposite sides of each first slide rail prevents mutual interference between the speed sensors 220 on the two first slide rails 210.

[0065] In this embodiment, as Figure 1 As shown, a plurality of speed sensors 220 are provided on the first slide rail 210, and the plurality of speed sensors 220 are arranged at intervals along the length direction of the first slide rail 210.

[0066] In this embodiment, as Figure 1 As shown, the speed detection mechanism 200 has offset detection mechanisms 300 on both sides along the first direction, and the clamping mechanism 400 is located on the side of the speed detection mechanism 200 away from the base 100 along the second direction. By providing offset detection mechanisms 300 on both sides of the speed detection mechanism 200 along the first direction, and connecting the two ends of the clamping mechanism 400 along the first direction to the corresponding offset detection mechanisms 300, the speed detection mechanism 200, the clamping mechanism 400, and the offset detection mechanism 300 enclose a space for accommodating the track inspection equipment.

[0067] It should be noted that, as Figure 1 As shown, in this embodiment, the offset detection mechanism 300 is provided in two sets, that is, the second slide rail 110 is provided in two sets, and the slide base 331 of each offset detection mechanism 300 is slidably connected to the corresponding second slide rail 110. The speed detection mechanism 200 is provided with offset detection mechanisms 300 on both sides along the first direction, and the speed detection mechanism 200 is provided with a second slide rail 110 on both sides along the first direction.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A calibration fixture for track inspection equipment, characterized in that, The calibration fixtures for the track inspection equipment include: Base (100); The speed detection mechanism (200) includes a first slide rail (210) and a speed sensor (220) disposed on the first slide rail (210). The first slide rail (210) is disposed on the base (100). The first slide rail (210) is used for sliding of the track inspection equipment, and the speed sensor (220) is used to detect the sliding speed of the track inspection equipment. Two offset detection mechanisms (300) are respectively disposed at both ends of the track inspection equipment along the first direction; the offset detection mechanism (300) includes a displacement sensor (310), the displacement sensor (310) is used to detect the offset of the track inspection equipment along the second direction, wherein the second direction, the first direction and the length direction of the first slide rail (210) are perpendicular to each other.

2. The calibration fixture for the track inspection equipment according to claim 1, characterized in that, It also includes a clamping mechanism (400), which includes two clamping plates (410) and a driving member (420). The driving member (420) can drive at least one of the clamping plates (410) to move, so that the two clamping plates (410) move towards each other to clamp or release the track inspection equipment. Each clamping plate (410) is provided with the displacement sensor (310).

3. The calibration fixture for the track inspection equipment according to claim 2, characterized in that, The drive unit (420) is connected to one of the clamps (410) via a lead screw structure (430).

4. The calibration fixture for the track inspection equipment according to claim 3, characterized in that, The clamping mechanism (400) further includes a fixing frame (440), which is slidably connected to the base (100) and has a cavity for accommodating the lead screw structure (430).

5. The calibration fixture for the track inspection equipment according to claim 1, characterized in that, The calibration fixture for the track inspection equipment also includes a clamping mechanism (400), which is used to clamp the track inspection equipment. The offset detection mechanism (300) further includes a pressure sensor (320). The end of the clamping mechanism (400) along the first direction is slidably connected to the base (100) via the pressure sensor (320). The pressure sensor (320) is used to detect the pressure change value at the end of the clamping mechanism (400) to calculate the offset of the track inspection equipment along the second direction.

6. The calibration fixture for the track inspection equipment according to claim 5, characterized in that, The offset detection mechanism (300) also includes: A support base (330) is slidably connected to the base (100). The support base (330) is provided with a through cavity (334). The pressure sensor (320) is disposed on the cavity wall of the through cavity (334). A support rod (340) has one end extending into the through cavity (334) and the other end located outside the through cavity (334) and connected to the clamping mechanism (400). The length direction of the support rod (340) is parallel to the second direction. An elastic element (350) is sleeved on the support rod (340) and located between the pressure sensor (320) and the inner bottom wall of the through cavity (334). The pressure sensor (320) is used to detect the elastic force of the elastic element (350).

7. The calibration fixture for the track inspection equipment according to claim 6, characterized in that, The offset detection mechanism (300) further includes a synchronization plate (360) disposed in the through cavity (334). The synchronization plate (360) is connected to the end of the support rod (340) away from the clamping mechanism (400), and the size of the synchronization plate (360) is larger than the size of the outlet of the through cavity (334).

8. The calibration fixture for the track inspection equipment according to claim 6, characterized in that, The support base (330) includes a slide (331), a storage base (332), and a limiting base (333) connected in sequence. The slide (331) is slidably engaged with the base (100). The limiting base (333) is provided with a first channel (3331), and the storage base (332) is provided with a second channel (3321). The first channel (3331) and the second channel (3321) are connected to form the through cavity (334). The pressure sensor (320) is disposed in the first channel (3331).

9. The calibration fixture for the track inspection equipment according to claim 1, characterized in that, The speed detection mechanism (200) also includes a connecting plate (230). There are two first slide rails (210), which are connected by the connecting plate (230). The speed sensor (220) is provided on the opposite side of each of the two first slide rails (210).

10. The calibration fixture for the track inspection equipment according to claim 9, characterized in that, The speed detection mechanism (200) is provided with the offset detection mechanism (300) on both sides along the first direction.

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