Surface strain gauge installation auxiliary tools

Abstract

This utility model discloses an auxiliary tool for installing surface strain gauges, used to align and install the surface strain gauge onto a steel pipe support. The surface strain gauge includes a main body and two mounting ends formed on opposite sides of the main body. The auxiliary tool includes two clamping members, two fixing devices, and two guide positioning strips. The clamping members are used to connect to designated positions on the steel pipe support and provide installation space for the surface strain gauge. The fixing devices are used to fix the surface strain gauge to the mounting surfaces provided by the two clamping members. The guide positioning strips are used to connect the two clamping members so that they maintain the same orientation. This utility model has the advantages of convenient installation and reusability.

Description

Technical Field

[0001] This utility model relates to the field of installation auxiliary tools, specifically to an installation auxiliary tool for surface strain gauges. Background Technology

[0002] Surface strain gauges are now widely used in strain testing for various engineering structures. When the stress inside the structure under test changes, the strain gauge senses the deformation synchronously. The deformation is transmitted to the vibrating string and transformed into a change in the stress of the vibrating string, thereby changing the vibration frequency of the vibrating string. The electromagnetic coil excites the vibrating string and measures its vibration frequency. The frequency signal is transmitted to the reading device via cable, and the strain inside the structure under test can be measured.

[0003] The installation of surface strain gauges (such as vibrating wire strain gauges) is a crucial step in structural health monitoring, and the quality of installation directly determines the accuracy and reliability of the measurement data. When monitoring stress in a structure, strain gauges need to be installed on the surface of the object. Current installation methods include: 1) Welding: The strain gauge is welded to the surface of the object being measured. This method requires operating space, and the high temperatures generated during welding can easily damage the precision components inside the strain gauge, leading to decreased measurement accuracy or even equipment failure. 2) Adhesion: The strain gauge is welded to the surface of the object being measured. For structures with poor surface flatness, adhesive bonding is less effective and makes it difficult to ensure proper alignment during installation.

[0004] Furthermore, the aforementioned installation methods, once fixed, are essentially impossible to disassemble and reuse, resulting in a waste of instrument resources. To address these issues, existing technologies have proposed several improved installation structures. For example, Chinese Patent 202120699186.X discloses a detachable adjustable angle strain gauge installation and positioning device and strain gauge installation structure; another example is Chinese Patent 202121812614.1, which discloses a surface strain gauge installed on the outside of a structure to measure force changes, and so on. To further improve installation convenience and reusability, this application proposes a further improved auxiliary tool for installing surface strain gauges on steel pipe supports. Utility Model Content

[0005] To at least partially address the shortcomings of the existing technology, the main objective of this utility model is to provide a surface strain gauge installation auxiliary tool that is easy to install and reusable.

[0006] To achieve the above main purpose, the present utility model discloses an auxiliary tool for installing a surface strain gauge, which is used to correctly install the surface strain gauge onto a steel pipe support. The surface strain gauge includes a main body portion and two mounting ends formed on opposite sides of the main body portion; wherein: the auxiliary tool for installing the surface strain gauge includes two clamping members, two fixators, and two guiding and positioning bars. The clamping members are used to connect to a designated position on the steel pipe support and provide an installation space for the surface strain gauge. The fixators are used to fix the surface strain gauge to the installation surface provided by the two clamping members. The guiding and positioning bars are used to connect the two clamping members so that the two clamping members maintain the same posture;

[0007] The clamping member includes a base and a set of clamping arms. The set of clamping arms are movably arranged on the base to clamp onto the steel pipe support; the base has an installation surface and two parallel positioning surfaces located on opposite sides of the installation surface. The guiding and positioning bar has an auxiliary positioning surface adapted to the parallel positioning surface. During installation, the guiding and positioning bar is fixedly connected to the base and the parallel positioning surface is kept flush with the auxiliary positioning surface; the fixator is removably installed on the installation surface of the base, and it has a central hole and a locking hole communicating with the central hole. The two mounting ends of the surface strain gauge respectively extend into the central holes of the two fixators and are locked by studs arranged in the locking holes.

[0008] According to a specific embodiment of the present utility model, the parallel positioning surface and the installation surface are perpendicular to each other.

[0009] According to a specific embodiment of the present utility model, the fixator is in a "pin" shape, which has a top step and two middle steps. The orifice of the locking hole is arranged at the top step; on the middle steps, there are first mounting holes, and on the base, there are first connecting holes. The fixator is connected to the base by bolts passing through the first mounting holes and connecting to the first connecting holes.

[0010] Furthermore, there are two or more sets of first connecting holes on the base.

[0011] According to a specific embodiment of the present utility model, the two mounting ends of the strain gauge are connected with a clearance fit to the central holes.

[0012] According to a specific embodiment of the present utility model, there are second connecting holes on the parallel positioning surface, and second mounting holes on the guiding and positioning bar. The guiding and positioning bar is assembled to the base by bolts passing through the second mounting holes and connecting to the second connecting holes.

[0013] Furthermore, the number of the second mounting holes and the second connecting holes is two or more.

[0014] According to a specific embodiment of the present utility model, the guiding and positioning bar is a metal positioning bar.

[0015] Furthermore, the guide positioning strip is a square prism-shaped metal positioning strip.

[0016] The present invention has the following advantages: The installation auxiliary tool of the present invention uses two clamping components to provide mounting surfaces for the two mounting ends of the surface strain gauge and to clamp them for installation. At the same time, two guide positioning strips are used to limit the posture of the two clamping components, thereby keeping the mounting surfaces of the two clamping components flush. The two mounting ends of the surface strain gauge are installed by two fixing devices. It has the advantages of convenient installation and easy operation, accurate installation position and reusability.

[0017] To more clearly illustrate the purpose, technical solution, and advantages of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a first perspective view of the surface strain gauge installation auxiliary tool of this utility model;

[0019] Figure 2 This is a second perspective view of the surface strain gauge installation auxiliary tool of this utility model;

[0020] Figure 3 This is the first exploded view of the surface strain gauge installation auxiliary tools;

[0021] Figure 4 This is the second exploded view of the surface strain gauge installation auxiliary tool;

[0022] Figure 5 This is a structural diagram of the surface strain gauge and the fixture.

[0023] Figure 6 This is a structural diagram of the base;

[0024] Figure 7 This is a state diagram of the surface strain gauge in use. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description with reference to the embodiments in order to provide a full understanding of this utility model; however, it should be understood that the following embodiments and detailed descriptions are for illustrative purposes only and do not limit the scope of protection of this utility model.

[0026] like Figure 1-2 , Figure 5As shown, the surface strain gauge 10 includes a main body 11 and two mounting ends 12 formed on opposite sides of the main body 11. During installation, the two mounting ends 12 must be aligned to ensure that the main body 11 is in a normal position, thereby ensuring the accuracy of the data during the monitoring process.

[0027] The surface strain gauge mounting aid in this embodiment is used to align and mount the strain gauge onto the steel pipe support a, such as... Figure 1-4 As shown, the surface strain gauge installation aid includes two clamping members 20, two retainers 30, and two guide positioning strips 40. The clamping members 20 are used to connect to the designated position of the steel pipe support a and provide installation space for the surface strain gauge. The retainers 30 are used to fix the surface strain gauge to the mounting surface 211 provided by the two clamping members 20. The guide positioning strips 40 are used to connect the two clamping members 20 so that the two clamping members 20 maintain the same posture.

[0028] Specifically, the clamping component 20 includes a base 21 and a set of clamping arms 22, which are movably mounted on the base 21 for clamping to the steel pipe support a; please refer to Figure 6 The base 21 has a mounting surface 211 and two parallel positioning surfaces 212 located on opposite sides of the mounting surface 211. The guide positioning strip 40 has an auxiliary positioning surface 41 adapted to the parallel positioning surface 212. During installation, the guide positioning strip 40 is fixedly connected to the base 21 and keeps the parallel positioning surface 212 and the auxiliary positioning surface 41 flush. Optionally, the parallel positioning surface 212 and the mounting surface 211 are perpendicular to each other, so that the guide positioning strip 40 will not encroach on the surface area of ​​the mounting surface 211.

[0029] Preferably, the guide positioning strip 40 is a metal positioning strip, specifically... Figure 4 The image shows a square prism-shaped metal positioning strip. To further ensure structural strength, the guide positioning strip 40 is made of solid stainless steel.

[0030] In this embodiment, the guide positioning strip 40 and the base 21 are connected by bolts. A second connecting hole 213 is provided on the parallel positioning surface 212, and a second mounting hole 42 is provided on the guide positioning strip 40. The guide positioning strip 40 is assembled onto the base 21 by a first bolt 43 that passes through the second mounting hole 42 and connects to the second connecting hole 213. Optionally, there may be two or more second mounting holes 42 and second connecting holes 213, which helps to maintain a multi-point collinear installation effect.

[0031] The retainer 30 is removably mounted to the mounting surface 211 of the base 21. Please refer to the following: Figure 5, the fixture 30 is provided with a central hole 31 and a locking hole 32 communicating with the central hole 31. The two mounting ends 12 of the surface strain gauge are respectively inserted into the central holes 31 of the two fixtures 30 and locked by studs arranged in the locking holes 32. For the convenience of installation, the fixture 30 is in a "pin" shape, which has a top step 33 and two middle steps 34. The orifice of the locking hole 32 is arranged at the top step 33; a first mounting hole 35 is provided on the middle step 34, and a first connecting hole 214 is provided on the base 21. The fixture 30 is connected to the base 21 through a second bolt 215 passing through the first mounting hole 35 and connecting to the first connecting hole 214.

[0032] Furthermore, two or more groups of first connecting holes 214 are provided on the base 21, so that it can be applicable to surface strain gauges with more length specifications. Correspondingly, a clearance fit connection is adopted between the two mounting ends 12 of the strain gauge and the central hole 31. During installation, the installation and fixing position can be adjusted adaptively in the length direction according to the specific position, with better compatibility and more convenient installation.

[0033] When the installation auxiliary tool in the embodiment is in use, first, the postures of the two tightening members 20 are fixed by the two guiding and positioning bars 40. Then, the surface strain gauge is installed on the base 21 of the tightening member 20 through the two fixtures 30. At this time, due to the existence of the guiding and positioning bars 40, the installation process of the surface strain gauge can be kept aligned. Then, the assembled whole is installed on the steel pipe support a. At this time, under the restriction of the guiding and positioning bars 40, the bases 21 of the two tightening members 20 remain relatively fixed and the postures are constant. After the tightening arms 22 of the tightening members 20 are fully tightened on the steel pipe support a, the guiding and positioning bars 40 are disassembled. As Figure 7 shown, at this time, the two tightening members 20 are independent of each other and the installation of the surface strain gauge is realized. During the construction process, when the steel pipe support a is stressed, the dynamic monitoring can be realized through the change of the collected data of the surface strain gauge. And after the monitoring is completed, the tightening members 20 and the surface strain gauge can be disassembled together and reused again in cooperation with the guiding and positioning bars 40.

[0034] Although the present invention has been described above through embodiments, the above embodiments are only used to exemplarily describe the feasible implementation schemes of the present invention, rather than to limit the protection scope of the present invention. Any equivalent replacement or change made by those skilled in the art according to the present invention shall also be covered by the protection scope defined by the claims of the present invention.

Claims

1. A surface strain gauge mounting auxiliary tool for aligning and mounting a surface strain gauge to a steel pipe support, the surface strain gauge including a main body portion and two mounting ends formed on opposite sides of the main body portion; characterized by, The surface strain gauge installation auxiliary tool includes two tightening members, two fixators and two guiding and positioning bars. The tightening members are used to connect to the specified positions of the steel pipe supports and provide an installation space for the surface strain gauges. The fixators are used to fix the surface strain gauges to the installation surfaces provided by the two tightening members. The guiding and positioning bars are used to connect the two tightening members so that the two tightening members maintain the same posture; The tightening member includes a base and a set of tightening arms. The set of tightening arms are movably arranged on the base to be tightened onto the steel pipe support; the base has an installation surface and two parallel positioning surfaces located on opposite sides of the installation surface. The guiding and positioning bar has an auxiliary positioning surface adapted to the parallel positioning surface. During installation, the guiding and positioning bar is fixedly connected to the base and the parallel positioning surface is kept flush with the auxiliary positioning surface; the fixator is removably installed on the installation surface of the base, and has a central hole and a locking hole communicating with the central hole. The two installation ends of the surface strain gauge respectively extend into the central holes of the two fixators and are locked by studs arranged in the locking holes.

2. The surface strain gage mounting aid tool of claim 1, wherein: The parallel positioning surface and the installation surface are perpendicular to each other.

3. The surface strain gage mounting aid tool of claim 1, wherein: The fixator is in a "pin" shape, having a top step and two middle steps. The orifice of the locking hole is arranged at the top step; a first installation hole is provided on the middle step, and a first connection hole is provided on the base. The fixator is connected to the base by a bolt passing through the first installation hole and connecting to the first connection hole.

4. The surface strain gage mounting aid tool of claim 3, wherein: Two or more sets of first connection holes are provided on the base.

5. The surface strain gage mounting aid tool of claim 1, wherein: A clearance fit connection is adopted between the two installation ends of the strain gauge and the central hole.

6. The surface strain gage mounting aid tool of claim 1, wherein: Second connection holes are provided on the parallel positioning surface, and second installation holes are provided on the guiding and positioning bar. The guiding and positioning bar is assembled to the base by bolts passing through the second installation holes and connecting to the second connection holes.

7. The surface strain gage installation aid tool of claim 6, wherein: The number of the second installation holes and the second connection holes is two or more.

8. The surface strain gage mounting aid tool of claim 1, wherein: The guiding and positioning bar is a metal positioning bar.

9. The surface strain gage mounting aid tool of claim 8, wherein: The guiding and positioning bar is a prismatic metal positioning bar with four sides.

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