Anti-interference strain gauge

Abstract

The utility model discloses an anti-interference strain gauge, and relates to the technical field of strain gauges, the anti-interference strain gauge comprises a sensor and an anti-interference assembly, the left side of the sensor is connected with a lead, and the anti-interference assembly used for preventing capacitance change caused by lead shaking is arranged outside the lead. And the wire anti-interference assembly comprises a limiting shell, a buffering inner piece, a mounting opening and a connecting piece, the buffering inner piece is arranged in the limiting shell, the mounting opening is formed in the top of the limiting shell, and the connecting piece is mounted at the lower end of the exterior of the limiting shell. According to the anti-interference strainmeter, the limiting shell made of hard plastic plays a role in directional leading and limiting on the wire, the buffering inner sheet made of rubber reduces external force borne by the limiting shell and transmits the external force to the wire, capacitance change caused by wire shaking is avoided, the limiting shell is in a C shape through the mounting opening, and the wire is convenient to mount and dismount; and the connection sheet made of a rubber material reduces the vibration of the mounting block, which is transmitted to the limiting shell.

Description

Technical Field

[0001] This utility model relates to the field of strain gauge technology, specifically to an anti-interference strain gauge. Background Technology

[0002] A strain gauge (sometimes called a strain meter) is a sensor that measures the change in resistance as a function of force. It converts physical quantities such as force, pressure, tension, and weight into changes in resistance, thereby measuring these physical quantities. When an external force acts on a stationary object, stress and strain are generated. The reaction force generated within the object (towards the external force) is called stress, and the resulting displacement and deformation are called strain.

[0003] For example, the utility model with application number 202420518759.8 belongs to the field of sensor technology, specifically relating to an anti-interference strain gauge. The strain gauge in this utility model is equipped with an anti-interference component, which is tubular, and the induction coil is located in the inner cavity of the anti-interference component, making the induction coil less susceptible to electromagnetic interference from external mirrors, thereby improving the accuracy of the strain gauge. In addition, the anti-interference component and the protective tube can be detached and installed, making installation and use simple and convenient. However, in existing strain gauges, the wires are usually not limited during use, and the shaking of the wires during use can easily cause capacitance changes, affecting the measurement results. Utility Model Content

[0004] The purpose of this invention is to provide an anti-interference strain gauge to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-interference strain gauge, comprising a sensor and an anti-interference component, wherein a wire is connected to the left side of the sensor, and the anti-interference component, which is used to prevent capacitance changes caused by wire shaking, is disposed outside the wire, and the wire anti-interference component includes a limiting shell, a buffer inner plate, a mounting port, and a connecting piece, wherein the limiting shell is provided with a buffer inner plate inside, and a mounting port is opened at the top of the limiting shell, and a connecting piece is installed at the lower end of the outer side of the limiting shell.

[0006] Furthermore, the limiting shell and the inner buffer sheet are tightly fitted together, and the limiting shell and the mounting port are assembled in a C-shape.

[0007] Furthermore, the inner buffer sheet and the limiting shell have the same shape, and the limiting shell and the wire are engaged and connected.

[0008] Furthermore, the sensor has a detection rod inside, and the end of the detection rod is connected to a mounting block, the mounting block having an assembly hole inside.

[0009] Furthermore, a fixing hole is provided on the side of the top of the mounting block, and a locking screw is provided inside the fixing hole.

[0010] Furthermore, an anchor head is installed at the lower end of the mounting block, and the mounting block and the anchor head are fixedly connected.

[0011] Furthermore, the anchor head is provided with auxiliary shock-absorbing components on its exterior, and two sets of these auxiliary components are provided.

[0012] Furthermore, the auxiliary component includes an auxiliary gasket and a mounting hole, and the auxiliary gasket has a mounting hole in the middle.

[0013] This invention provides an anti-interference strain gauge with the following advantages:

[0014] 1. This utility model uses a hard plastic limiting shell to guide and limit the wires. The rubber buffer inner sheet reduces the external force transmitted to the limiting shell and prevents the wires from shaking and causing capacitance changes. The mounting port makes the limiting shell C-shaped, which facilitates the installation and removal of the wires and will not damage the wires. The rubber connecting piece reduces the vibration of the mounting block transmitted to the limiting shell.

[0015] 2. This utility model uses an auxiliary pad made of rubber to reduce the vibration transmitted from the tested surface to the mounting block, thus isolating the tested object from the vibration source and reducing its impact. The mounting hole allows the auxiliary pad to be fitted onto the outside of the anchor head, making operation simple. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an anti-interference strain gauge according to the present invention;

[0017] Figure 2 This is a schematic diagram of the anti-interference component structure of an anti-interference strain gauge according to the present invention.

[0018] Figure 3 This is a schematic diagram of the auxiliary component structure of an anti-interference strain gauge according to the present invention.

[0019] In the diagram: 1. Sensor; 2. Wire; 3. Anti-interference component; 301. Limiting shell; 302. Buffer inner plate; 303. Mounting port; 304. Connecting piece; 4. Detection rod; 5. Mounting block; 6. Assembly hole; 7. Fixing hole; 8. Locking screw; 9. Anchor head; 10. Auxiliary component; 1001. Auxiliary gasket; 1002. Mounting hole. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] like Figure 1 and Figure 2As shown, an anti-interference strain gauge includes a sensor 1 and an anti-interference component 3. A wire 2 is connected to the left side of the sensor 1. The anti-interference component 3, which prevents capacitance changes caused by the shaking of the wire 2, is disposed outside the wire 2. The anti-interference component 3 includes a limiting shell 301, a buffer inner plate 302, a mounting port 303, and a connecting piece 304. The buffer inner plate 302 is disposed inside the limiting shell 301. The limiting shell 301, made of hard plastic, serves to orient and limit the wire 2. The limiting shell 301 and the buffer inner plate 302 fit tightly together. The buffer inner plate 302, made of rubber, reduces the external force transmitted to the limiting shell 301 to the wire 2, preventing capacitance changes caused by the shaking of the wire 2. The limiting shell 301 and the mounting port 304 fit tightly together. The mounting opening 303 is C-shaped, which makes the limiting shell 301 C-shaped to facilitate the installation and removal of the wire 2 without damaging the wire 2. The top of the limiting shell 301 has a mounting opening 303. The lower end of the outer side of the limiting shell 301 is equipped with a connecting piece 304. The rubber connecting piece 304 reduces the vibration of the mounting block 5 transmitted to the limiting shell 301. The inner buffer piece 302 has the same shape as the limiting shell 301, and the limiting shell 301 and the wire 2 are snapped together. The sensor 1 has a detection rod 4 inside, and the end of the detection rod 4 is connected to the mounting block 5. The mounting block 5 has an assembly hole 6 inside, and a fixing hole 7 is opened on the side of the top of the mounting block 5. A locking screw 8 is installed inside the fixing hole 7.

[0022] like Figure 3 As shown, an anchor head 9 is installed at the lower end of the mounting block 5, and the mounting block 5 and the anchor head 9 are fixedly connected. An auxiliary component 10 for shock absorption is provided on the outside of the anchor head 9, and two sets of auxiliary components 10 are provided. The auxiliary component 10 includes an auxiliary pad 1001 and a mounting hole 1002. The rubber auxiliary pad 1001 reduces the vibration transmitted to the mounting block 5 from the tested surface, so that the tested object is isolated from the vibration source and the impact is reduced. The auxiliary pad 1001 has a mounting hole 1002 in the middle, which allows the auxiliary pad 1001 to be fitted onto the outside of the anchor head 9, making the operation simple.

[0023] In summary, this anti-interference strain gauge is first based on Figures 1-3The structure shown has an opening in the plane to be tested for the installation of the anchor head 9. During installation, the auxiliary gasket 1001 is fitted onto the outside of the anchor head 9 through the mounting hole 1002, so that the object under test is isolated from the vibration source and the influence is reduced. Then, the wire 2 is inserted into the limiting shell 301 and the buffer inner piece 302. The hard plastic limiting shell 301 serves to guide and limit the wire 2, and the rubber buffer inner piece 302 reduces the external force transmitted to the limiting shell 301 to the wire 2, preventing the wire 2 from shaking and causing capacitance changes. During subsequent disassembly, the mounting port 303 makes the limiting shell 301 C-shaped to facilitate the installation and disassembly of the wire 2 without damaging the wire 2. At the same time, the rubber connecting piece 304 reduces the vibration of the mounting block 5 transmitted to the limiting shell 301.

[0024] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An interference-resistant strain gauge comprising a sensor (1) and an interference- resistant assembly (3), characterized in that, The left side of the sensor (1) is connected with a wire (2), the anti-interference assembly (3) for avoiding the capacitance change caused by the wire (2) shaking is arranged outside the wire (2), and the wire (2) anti-interference assembly (3) comprises a limiting shell (301), a buffer inner sheet (302), a mounting port (303) and a connecting sheet (304), the inside of the limiting shell (301) is provided with the buffer inner sheet (302), the top of the limiting shell (301) is provided with the mounting port (303), and the lower end of the limiting shell (301) is provided with the connecting sheet (304) outside.

2. An interference-resistant strain gauge according to claim 1, characterized in that The limiting shell (301) and the buffer inner sheet (302) are closely attached, and the limiting shell (301) and the mounting port (303) are assembled into a C-shaped structure.

3. The interference-resistant strain gauge according to claim 1, characterized in that The buffer inner sheet (302) and the limiting shell (301) are consistent in shape, and the limiting shell (301) and the wire (2) are clamped and connected.

4. The interference-resistant strain gauge of claim 1, wherein, The inside of the sensor (1) is provided with a detection rod (4), and the end of the detection rod (4) is connected with a mounting block (5), and the inside of the mounting block (5) is provided with an assembly hole (6).

5. An interference-resistant strain gauge according to claim 4, wherein The side of the top of the mounting block (5) is provided with a fixing hole (7), and the inside of the fixing hole (7) is provided with a locking screw (8).

6. An interference-resistant strain gauge according to claim 4, wherein The lower end of the mounting block (5) is provided with an anchoring head (9), and the mounting block (5) and the anchoring head (9) are fixedly connected.

7. An interference-resistant strain gauge according to claim 6, characterised in that The outside of the anchoring head (9) is provided with an auxiliary assembly (10) for auxiliary shock absorption, and the number of the auxiliary assembly (10) is two.

8. An interference-resistant strain gauge according to claim 7, characterised in that, The auxiliary assembly (10) comprises an auxiliary gasket (1001) and a mounting hole (1002), and the middle of the auxiliary gasket (1001) is provided with the mounting hole (1002). The outside of the anchoring head (9) is provided with an auxiliary assembly (10) for auxiliary shock absorption, and the number of the auxiliary assembly (10) is two. The auxiliary assembly (10) comprises an auxiliary gasket (1001) and a mounting hole (1002), and the middle of the auxiliary gasket (1001) is provided with the mounting hole (1002).

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