Gap measuring tool

Abstract

The utility model provides a gap measuring tool, which comprises a three-dimensional mobile platform and an ultrasonic ranging and scanning assembly arranged on the three-dimensional mobile platform, and the ultrasonic ranging and scanning assembly is driven by the three-dimensional mobile platform to move in a gap so as to measure the size of the gap and obtain an internal image of the gap through ultrasonic scanning; the ultrasonic ranging and scanning assembly comprises a connecting rod, ultrasonic emission receivers and a rotating motor, the rotating motor is installed on the three-dimensional moving platform, one end of the connecting rod is connected with an output shaft of the rotating motor, the other end of the connecting rod is connected with the ultrasonic emission receivers, and the ultrasonic emission receivers comprise the first ultrasonic emission receiver and the second ultrasonic emission receiver; the first ultrasonic transmitter-receiver is installed on the end face of the connecting rod, the second ultrasonic transmitter-receiver is installed on the side face of the connecting rod, and the rotating motor drives the connecting rod and the second ultrasonic transmitter-receiver to rotate so as to achieve multi-angle measurement and scanning of gaps.

Description

Technical Field

[0001] This application relates to the field of measuring equipment technology, and in particular to a gap measuring tool. Background Technology

[0002] During turbine maintenance, many gaps inside the unit need to be measured. Currently, the dimensions of these gaps are mainly measured by workers using rulers. However, the internal structure of the gaps is complex, and measuring with a ruler is inefficient and inaccurate. In addition, it is impossible to obtain information about the internal condition of the gaps, which causes inconvenience for maintenance. Utility Model Content

[0003] In view of this, the purpose of this application is to propose a gap measuring tool to improve the measurement efficiency and accuracy of gaps in turbine units, obtain the internal condition of the gaps, and improve maintenance efficiency.

[0004] This application provides a gap measurement tool, including: a three-dimensional moving platform and an ultrasonic ranging and scanning component mounted on the three-dimensional moving platform, wherein the ultrasonic ranging and scanning component is driven by the three-dimensional moving platform to move in the gap, so as to measure the gap size and obtain an image of the gap interior by ultrasonic scanning;

[0005] The ultrasonic ranging and scanning assembly includes a connecting rod, an ultrasonic transmitter and receiver, and a rotary motor. The rotary motor is mounted on the three-dimensional moving platform. One end of the connecting rod is connected to the output shaft of the rotary motor, and the other end is connected to the ultrasonic transmitter and receiver. The ultrasonic transmitter and receiver includes a first ultrasonic transmitter and receiver and a second ultrasonic transmitter and receiver. The first ultrasonic transmitter and receiver is mounted on the end face of the connecting rod, and the second ultrasonic transmitter and receiver is mounted on the side of the connecting rod. The rotary motor drives the connecting rod and the second ultrasonic transmitter and receiver to rotate, so as to realize multi-angle measurement and scanning of the gap.

[0006] Optionally, the three-dimensional mobile platform includes:

[0007] A first mobile platform is used to drive the ultrasonic ranging and scanning assembly to move linearly along a first direction;

[0008] The second mobile platform is vertically mounted on the first mobile platform and is used to drive the ultrasonic ranging scanning component to move linearly along a second direction perpendicular to the first direction.

[0009] The third moving platform is vertically mounted on the second moving platform and is used to drive the ultrasonic ranging scanning component to move linearly along a direction that is perpendicular to both the first direction and the second direction.

[0010] Optionally, the first mobile platform includes:

[0011] The first mounting block is provided with a first sliding groove;

[0012] The first screw is rotatably connected within the first groove;

[0013] The first drive motor is fixedly mounted on the first mounting block and its output shaft is fixedly connected to the first screw.

[0014] The first slider is threadedly connected to the first screw and drives the second moving platform to move linearly along the first direction.

[0015] Optionally, the second mobile platform includes:

[0016] The second mounting block is connected to the first slider and is provided with a second sliding groove;

[0017] The second screw is rotatably connected within the second groove;

[0018] The second drive motor is fixedly mounted on the second mounting block and its output shaft is fixedly connected to the second screw.

[0019] The second slider is threadedly connected to the second screw and drives the third moving platform to move linearly along the second direction.

[0020] Optionally, the third mobile platform includes:

[0021] The third mounting block is connected to the second slider and is provided with a third sliding groove;

[0022] The third screw is rotatably connected within the third groove;

[0023] The third drive motor is fixedly mounted on the third mounting block and its output shaft is fixedly connected to the third screw.

[0024] The third slider is threadedly connected to the third screw and drives the ultrasonic ranging scanning component to move linearly along the third direction.

[0025] Optionally, the rotary motor is fixedly mounted on the third slider.

[0026] Optionally, the first mobile platform further includes a mounting base, the first mounting block is fixed on the mounting base, and the vertical cross-section of the mounting base is trapezoidal.

[0027] Optionally, the mounting base has a mounting groove, and the first mounting block is installed in the mounting groove.

[0028] Optionally, the bottom surface of the mounting base is provided with anti-slip texture.

[0029] Optionally, the mounting base has mounting points on its side for mounting grounding connectors.

[0030] As can be seen from the above, the gap measurement tool provided in this application includes a three-dimensional moving platform and an ultrasonic ranging and scanning component. The ultrasonic ranging and scanning component moves in three dimensions within the gap to accurately measure the internal dimensions of the gap and obtain the internal condition of the gap through ultrasonic scanning. Compared with traditional caliper gap measurement, the gap measurement tool in this application improves the efficiency and accuracy of gap measurement through ultrasonic ranging. On the other hand, it obtains the three-dimensional morphological features of the gap through ultrasonic scanning, which is beneficial for discovering potential wear, cracks and other defects on the surface of turbine equipment. This reduces safety hazards associated with the turbine unit. Furthermore, the ultrasonic ranging and scanning assembly includes a connecting rod, an ultrasonic transmitter and receiver, and a rotary motor. The rotary motor is mounted on the three-dimensional moving platform. The two ends of the connecting rod are connected to the rotary motor and the ultrasonic transmitter and receiver, respectively. The ultrasonic transmitter and receiver includes a first ultrasonic transmitter and receiver and a second ultrasonic transmitter and receiver. The first ultrasonic transmitter and receiver is mounted on the end face of the connecting rod, with its ultrasonic receiving end face facing the bottom of the gap to measure the gap depth and scan the bottom wall of the gap. The second ultrasonic transmitter and receiver is mounted on the side of the connecting rod, with its ultrasonic receiving end face facing the side wall of the gap. The rotary motor drives the connecting rod and the second ultrasonic transmitter and receiver to rotate, allowing the second ultrasonic transmitter and receiver to measure the gap dimensions from multiple angles and comprehensively scan the side wall of the gap, reducing measurement blind spots and scanning blind spots, and improving the integrity of measurement data and scanning. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram showing a first mobile platform and a second mobile platform is provided for embodiments of this application;

[0033] Figure 2 A schematic diagram of a third mobile platform is shown for an embodiment of this application;

[0034] Figure 3 This is a schematic diagram showing the ultrasonic ranging scanning component in an embodiment of this application.

[0035] Reference numerals: 1. Three-dimensional moving platform; 11. First moving platform; 111. First mounting block; 1111. First slide groove; 112. First screw; 113. First drive motor; 114. First slider; 115. Mounting base; 1151. Mounting slot; 12. Second moving platform; 121. Second mounting block; 1211. Second slide groove; 122. Second screw; 123. Second drive motor; 124. Second slider; 13. Third moving platform; 131. Third mounting block; 1311. Third slide groove; 132. Third screw; 133. Third drive motor; 134. Third slider; 2. Ultrasonic ranging and scanning assembly; 21. Connecting rod; 22. Ultrasonic transmitter and receiver; 221. First ultrasonic transmitter and receiver; 222. Second ultrasonic transmitter and receiver; 23. Rotary motor. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0037] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] As mentioned in the background, accurately measuring various clearance dimensions is a crucial step in ensuring the safe operation of hydroelectric turbine units during maintenance. Currently, this work mainly relies on manual measurement using traditional measuring tools (such as feeler gauges and calipers), which faces many challenges in practice: Firstly, due to the complex internal structure of hydroelectric turbine units, caliper measurements are not only inefficient (measuring a single clearance can take several hours), but also difficult to guarantee accuracy (the error is generally above ±0.5mm); secondly, traditional methods can only obtain local dimensional data of the clearances, failing to fully grasp the three-dimensional morphological characteristics of the clearances, and making it even more difficult to detect potential defects such as wear and cracks.

[0039] This outdated measurement method directly impacts the quality and efficiency of unit maintenance. Inaccurate measurement data can lead to accumulated assembly errors, affecting the stability of unit operation; while low measurement efficiency prolongs maintenance periods and increases maintenance costs. More importantly, due to a lack of comprehensive understanding of the internal conditions of the clearances, some potential safety hazards may be overlooked, posing risks to the long-term operation of the equipment. As modern hydroelectric units develop towards larger capacity and higher parameters, the requirements for the accuracy and efficiency of clearance measurement are becoming increasingly stringent, necessitating the development of new intelligent measurement technologies and equipment to overcome current technological bottlenecks.

[0040] To address the aforementioned problems, this application provides a gap measuring tool.

[0041] The following is in conjunction with the appendix Figure 1-3 The embodiments of this application will be described in detail below.

[0042] like Figure 1 , Figure 2 and Figure 3 As shown, a gap measurement tool includes: a three-dimensional moving platform 1 and an ultrasonic ranging and scanning component 2 mounted on the three-dimensional moving platform 1. The ultrasonic ranging and scanning component 2 is driven by the three-dimensional moving platform 1 to move in the gap in order to measure the gap size and obtain an image of the gap interior through ultrasonic scanning.

[0043] The ultrasonic ranging and scanning assembly 2 includes a connecting rod 21, an ultrasonic transmitter and receiver 22, and a rotary motor 23. The rotary motor 23 is mounted on the three-dimensional moving platform 1. One end of the connecting rod 21 is connected to the output shaft of the rotary motor 23, and the other end is connected to the ultrasonic transmitter and receiver 22. The ultrasonic transmitter and receiver 22 includes a first ultrasonic transmitter and receiver 221 and a second ultrasonic transmitter and receiver 222. The first ultrasonic transmitter and receiver 221 is mounted on the end face of the connecting rod 21, and the second ultrasonic transmitter and receiver 222 is mounted on the side of the connecting rod 21. The rotary motor 23 drives the connecting rod 21 and the second ultrasonic transmitter and receiver 222 to rotate, so as to realize multi-angle measurement and scanning of the gap.

[0044] Specifically, the ultrasonic ranging and scanning component 2 is installed on the three-dimensional moving platform 1. The three-dimensional moving platform 1 drives the ultrasonic ranging and scanning component 2 to move in three dimensions within the gap, so as to accurately measure the internal dimensions of the gap and obtain the internal condition of the gap through ultrasonic scanning. Compared with the traditional caliper measurement of gaps, the gap measurement tool in this embodiment improves the efficiency and accuracy of gap measurement through ultrasonic ranging. On the other hand, it obtains the three-dimensional morphological features of the gap through ultrasonic scanning, which is conducive to discovering potential wear, cracks and other defects on the surface of the turbine unit equipment, thereby reducing the safety hazards of the turbine unit.

[0045] Furthermore, the ultrasonic ranging and scanning assembly 2 includes a connecting rod 21, an ultrasonic transmitter and receiver 22, and a rotary motor 23. The rotary motor 23 is mounted on the three-dimensional moving platform 1. The two ends of the connecting rod 21 are respectively connected to the rotary motor 23 and the ultrasonic transmitter and receiver 22. The ultrasonic transmitter and receiver 22 includes a first ultrasonic transmitter and receiver 221 and a second ultrasonic transmitter and receiver 222. The first ultrasonic transmitter and receiver 221 is mounted on the end face of the connecting rod 21, and its ultrasonic transmitting and receiving end face is opposite to the bottom of the gap to measure the gap depth and scan the bottom wall of the gap. The second ultrasonic transmitter and receiver 222 is mounted on the side of the connecting rod 21, and its ultrasonic transmitting and receiving end face is opposite to the side wall of the gap. The rotary motor 23 drives the connecting rod 21 and the second ultrasonic transmitter and receiver 222 to rotate, so that the second ultrasonic transmitter and receiver 222 can fully measure the gap size and fully scan the gap side wall, reducing the measurement blind zone and the scanning blind zone, and improving the integrity of the measurement data and the scan.

[0046] In some embodiments, such as Figure 1 and Figure 2 As shown, the three-dimensional mobile platform 1 includes:

[0047] The first mobile platform 11 is used to drive the ultrasonic ranging and scanning component 2 to move linearly along a first direction;

[0048] The second mobile platform 12 is vertically mounted on the first mobile platform 11 and is used to drive the ultrasonic ranging scanning component 2 to move linearly along a second direction perpendicular to the first direction.

[0049] The third mobile platform 13 is vertically mounted on the second mobile platform 12 and is used to drive the ultrasonic ranging scanning component 2 to move linearly in a direction that is perpendicular to both the first direction and the second direction.

[0050] Specifically, in this embodiment, the three-dimensional moving platform 1 adopts a triaxial orthogonal stacked structure, consisting of a first moving platform 11, a second moving platform 12, and a third moving platform 13 installed vertically in sequence. These platforms drive the ultrasonic ranging scanning component 2 to move linearly along three mutually perpendicular directions: the X direction (first direction), the Y direction (second direction), and the Z direction (third direction). In this embodiment, the first moving platform 11, the second moving platform 12, and the third moving platform 13 are independently controlled to ensure no coupling interference in the movement directions, thereby enabling the ultrasonic ranging scanning component 2 to perform efficient measurement and scanning in irregular gaps. The first moving platform 11, serving as the basic support platform of the three-dimensional moving platform 1, is made of high-strength steel to ensure high stability and high load-bearing capacity of the overall structure. The second moving platform 12 and the third moving platform 13 are made of high-strength aluminum alloy, achieving lightweight design while ensuring structural rigidity.

[0051] In some embodiments, such as Figure 1 and Figure 2 As shown, the first mobile platform 11 includes:

[0052] The first mounting block 111 is provided with a first sliding groove 1111;

[0053] The first screw 112 is rotatably connected within the first slide groove 1111;

[0054] The first drive motor 113 is fixedly mounted on the first mounting block 111 and its output shaft is fixedly connected to the first screw 112.

[0055] The first slider 114 is threadedly connected to the first screw 112 and drives the second moving platform 12 to move linearly along the first direction.

[0056] Additionally, the second mobile platform 12 includes:

[0057] The second mounting block 121 is connected to the first slider 114 and is provided with a second sliding groove 1211;

[0058] The second screw 122 is rotatably connected within the second slide groove 1211;

[0059] The second drive motor 123 is fixedly mounted on the second mounting block 121 and its output shaft is fixedly connected to the second screw 122.

[0060] The second slider 124 is threadedly connected to the second screw 122 and drives the third moving platform 13 to move linearly in the second direction.

[0061] The third mobile platform 13 includes:

[0062] The third mounting block 131 is connected to the second slider 124 and is provided with a third sliding groove 1311;

[0063] The third screw 132 is rotatably connected within the third slide groove 1311;

[0064] The third drive motor 133 is fixedly mounted on the third mounting block 131 and its output shaft is fixedly connected to the third screw 132;

[0065] The third slider 134 is threadedly connected to the third screw 132 and drives the ultrasonic ranging and scanning assembly 2 to move linearly along a third direction. The rotary motor 23 is fixedly mounted on the third slider 134.

[0066] In this embodiment, the first mounting block 111 serves as the support structure for the first moving platform 11. A first sliding groove 1111 is provided on the first mounting block 111, providing guidance and space for the rotation of the first screw 112 and the sliding of the first slider 114. The first screw 112 is rotatably connected within the first sliding groove 1111. When the first screw 112 rotates, it converts rotational motion into linear motion, thereby driving the first slider 114, which is threadedly connected to it, to move. A first drive motor 113 is fixedly mounted on the first mounting block 111, and its output shaft is fixedly connected to the first screw 112. The first drive motor 113 provides power for the rotation of the first screw 112. By controlling the speed and direction of the first drive motor 113, the moving speed and direction of the first slider 114 can be precisely controlled. The first slider 114 is threadedly connected to the first screw 112. When the first screw 112 rotates, the first slider 114 moves linearly along the first sliding groove 1111 in a first direction, simultaneously driving the second moving platform 12 connected to it to move together. The second moving platform 12 and the third moving platform 13 have the same specific structure as the first moving platform 11, and therefore, the specific structure of the second moving platform 12 and the third moving platform 13 has the same functions as described above. The first moving platform 11, the second moving platform 12, and the third moving platform 13 respectively achieve precise adjustment of the position of the ultrasonic ranging scanning component 2 by precisely controlling the speed and direction of each drive motor. The three-dimensional moving platform 1 uses a screw-slider transmission method to drive the ultrasonic ranging scanning component 2, which has high transmission accuracy and stability, and reduces errors and jitter during gap measurement.

[0067] In some embodiments, the first mobile platform 11 further includes a mounting base 115, the first mounting block 111 is fixed on the mounting base 115, and the vertical cross section of the mounting base 115 is trapezoidal.

[0068] In addition, the mounting base 115 has a mounting groove 1151, and the first mounting block 111 is installed in the mounting groove 1151.

[0069] Specifically, the first mounting block 111 is connected to the mounting base 115 by bolts to improve the stability of the first mounting block 111 in the mounting groove 1151, thereby enhancing the stability of the three-dimensional moving platform 1.

[0070] In this embodiment, the mounting base 115 serves as the basic support component of the first mobile platform 11. Its vertical cross-section is designed as a trapezoid. The trapezoidal base has a large contact area with the ground and a low center of gravity, making the entire first mobile platform 11 more stable during operation and reducing swaying and offset caused by external interference or its own movement. The mounting groove 1151 on the mounting base 115 provides an installation position for the first mounting block 111, so that the first mounting block 111 can be connected to the mounting base 115.

[0071] In some embodiments, the bottom surface of the mounting base 115 is provided with anti-slip texture.

[0072] Specifically, the anti-slip texture is distributed in a regular and dense grid pattern and evenly covers the bottom surface of the mounting base 115 to increase the anti-slip effect of the mounting base 115.

[0073] In this embodiment, the gap measuring tool is often used in slippery environments. The anti-slip texture on the bottom surface of the mounting base 115 can effectively allow the gap measuring tool to slide, thus improving the stability of the gap measuring tool.

[0074] In some embodiments, the mounting base 115 has mounting points on its side for mounting grounding connectors.

[0075] Specifically, the mounting point is located on the side of the mounting base 115, and the mounting point is provided with a threaded hole, into which a ground bolt is inserted.

[0076] In this embodiment, by setting mounting points on the side of the mounting base 115 and installing ground-inserting connectors within the mounting points, the anti-displacement capability of the mounting base 115 is enhanced. Specifically, the ground-inserting connectors penetrate deep into the ground, utilizing the supporting force of the underlying medium such as soil to form a more stable anchoring effect, greatly improving the stability of the gap measuring tool in complex environments.

[0077] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0078] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully within the understanding of those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0079] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0080] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the claims of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A gap measuring tool characterized by, The utility model relates to a kind of three-dimensional mobile platform (1) and install ultrasonic ranging scanning assembly (2) on the three-dimensional mobile platform (1), the ultrasonic ranging scanning assembly (2) is driven in gap by the three-dimensional mobile platform (1) and moves, to measure gap size and obtain imaging inside gap by ultrasonic scanning; The ultrasonic ranging scanning assembly (2) includes a connecting rod (21), an ultrasonic transmitter-receiver (22) and a rotary motor (23), the rotary motor (23) is installed on the three-dimensional mobile platform (1), one end of the connecting rod (21) is connected with the output shaft of the rotary motor (23), the other end is connected with the ultrasonic transmitter-receiver (22), the ultrasonic transmitter-receiver (22) includes a first ultrasonic transmitter-receiver (221) and a second ultrasonic transmitter-receiver (222), the first ultrasonic transmitter-receiver (221) is installed on the end surface of the connecting rod (21), the second ultrasonic transmitter-receiver (222) is installed on the side of the connecting rod (21), the rotary motor (23) drives the connecting rod (21) and the second ultrasonic transmitter-receiver (222) to rotate, to realize multi-angle measurement and scanning to gap. The three-dimensional mobile platform (1) includes:

2. A gap measuring tool according to claim 1, wherein, A first mobile platform (11) for driving the ultrasonic ranging scanning assembly (2) to move linearly in a first direction; A second mobile platform (12) vertically installed on the first mobile platform (11) for driving the ultrasonic ranging scanning assembly (2) to move linearly in a second direction perpendicular to the first direction; A third mobile platform (13) vertically installed on the second mobile platform (12) for driving the ultrasonic ranging scanning assembly (2) to move linearly in a direction perpendicular to both the first direction and the second direction. The first mobile platform (11) includes:

3. A gap measuring tool according to claim 2, wherein, A first mounting block (111) provided with a first sliding groove (1111); A first screw rod (112) rotatably connected in the first sliding groove (1111); A first drive motor (113) fixedly installed on the first mounting block (111) with its output shaft fixedly connected with the first screw rod (112); A first sliding block (114) threadedly connected with the first screw rod (112) and driving the second mobile platform (12) to move linearly in the first direction. The second mobile platform (12) includes:

4. A gap measuring tool according to claim 3, wherein, A second mounting block (121) connected with the first sliding block (114) and provided with a second sliding groove (1211); A second screw rod (122) rotatably connected in the second sliding groove (1211); A second drive motor (123) fixedly installed on the second mounting block (121) with its output shaft fixedly connected with the second screw rod (122); A second sliding block (124) threadedly connected with the second screw rod (122) and driving the third mobile platform (13) to move linearly in the second direction. The third mobile platform (13) includes:

5. A gap measuring tool according to claim 4, wherein, A third mounting block (131) connected with the second sliding block (124) and provided with a third sliding groove (1311); ​ A third screw rod (132) is rotatably connected in the third sliding groove (1311); A third driving motor (133) is fixedly installed on the third mounting block (131) and has an output shaft fixedly connected with the third screw rod (132); A third sliding block (134) is threadedly connected with the third screw rod (132) and drives the ultrasonic ranging scanning assembly (2) to move linearly in a third direction.

6. A gap measuring tool according to claim 5, wherein, The rotary motor (23) is fixedly installed on the third sliding block (134).

7. A gap measuring tool according to claim 3, wherein, The first moving platform (11) further comprises a mounting base (115), the first mounting block (111) is fixed on the mounting base (115), and a vertical section of the mounting base (115) is trapezoidal.

8. A gap measuring tool according to claim 7, wherein, A mounting groove (1151) is formed in the mounting base (115), and the first mounting block (111) is installed in the mounting groove (1151).

9. A gap measuring tool according to claim 8, wherein, An antiskid pattern is arranged on a bottom surface of the mounting base (115).

10. A gap measuring tool according to claim 7, wherein, A mounting site is connected to a side surface of the mounting base (115) and is used for mounting a ground insertion connecting piece.

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