A highly adaptable resistance strain gauge

Abstract

The present invention relates to the field of strain gauge technology, and more specifically, to a highly adaptable resistive strain gauge, comprising a circular base and a circular housing; a circular test plate fixedly mounted on the circular housing; the circular test plate disposed above the base; a longitudinal sensitive grid and a transverse sensitive grid disposed on the top of the circular test plate; a test hole extending through the circular test plate; a receiving groove disposed on the circular base; floating pins disposed on both the longitudinal sensitive grid and the transverse sensitive grid; and a first adhesive layer disposed on the circular test plate. The present invention accurately infers the direction of force by obtaining horizontal and vertical strain data during the initial measurement process, and further adjusts the installation direction of the strain gauge so that the measurement direction of one of the sensitive grids is consistent with the direction of the actual strain, thereby reducing errors caused by angle mismatch. This design not only avoids the directional limitations of traditional strain gauges, but also improves measurement accuracy, ensuring high accuracy even in dynamically changing environments.

Description

Technical Field

[0001] The present invention relates to the technical field of strain gauges, and in particular to a resistance strain gauge with strong adaptability. Background Art

[0002] Traditional resistive strain gauges typically rely on single-direction strain measurement, meaning their sensitive grids are oriented in the same direction as the strain on the object being measured. However, in real-world applications, the direction of applied force can vary, making traditional strain gauges incapable of accurately measuring multi-directional stresses. To address this challenge, multiple strain gauges or complex sensor arrays are often required to comprehensively measure strain in different directions. This, in some applications, not only increases cost and design complexity but can also lead to inconsistent or inaccurate measurement results. Summary of the Invention

[0003] The object of the present invention is to provide a resistance strain gauge with strong adaptability in view of the above-mentioned deficiencies in the prior art.

[0004] The object of the present invention is achieved by the following technical solution: a highly adaptable resistance strain gauge, comprising a circular base and a circular housing rotatably connected to the circular base; a circular test plate fixedly mounted on the circular housing; the circular base, the circular housing, and the circular test plate are concentrically arranged; the circular test plate is disposed above the base;

[0005] A longitudinal sensitive grid and a transverse sensitive grid are provided on the top of the circular test plate; the longitudinal sensitive grid and the transverse sensitive grid are arranged perpendicularly;

[0006] The circular test plate is provided with a test hole through it; the top of the circular base is provided with a receiving groove; the longitudinal sensitive grid and the transverse sensitive grid are both provided with floating pins; the floating pins pass through the test hole and are arranged in the receiving groove; the bottom of the circular test plate is provided with a first glue bottom layer.

[0007] The present invention is further configured such that a rotation groove is provided at the center of the top of the circular base; a rotation column is provided at the center of the bottom of the circular shell; and the rotation column passes through the circular test plate and is rotationally connected to the rotation groove.

[0008] The present invention is further configured such that a longitudinal lead is passed through the circular housing; and the longitudinal lead is connected to the longitudinal sensitive grid.

[0009] The present invention is further configured such that a transverse lead is passed through the circular housing; and the transverse lead is connected to the transverse sensitive grid.

[0010] The present invention is further configured such that a floating groove is provided at the bottom of the longitudinal sensitive grid and the bottom of the transverse sensitive grid; and the floating pin is telescopically arranged in the floating groove.

[0011] The present invention is further configured such that a floating spring is provided between the inner wall of the floating groove and the top of the floating pin.

[0012] The present invention is further configured such that a handle is provided on the side wall of the circular test plate; and a calibration block is provided on the side wall of the circular base.

[0013] The present invention is further configured such that a second adhesive layer is provided at the bottom of the circular base.

[0014] The present invention is further configured such that the longitudinal sensitive fence and the transverse sensitive fence each comprise a long connecting rod and a short connecting rod that are alternately connected in sequence; and a floating pin is provided in the middle of each short connecting rod.

[0015] The present invention is further configured such that a through hole is provided through the first adhesive layer; and the floating pin is passed through the through hole.

[0016] Beneficial effects of the present invention: By obtaining strain data in the horizontal and vertical directions during the initial measurement process, the present invention can accurately calculate the force direction and further adjust the installation direction of the strain gauge so that the measurement direction of one of the sensitive grids is consistent with the direction of the actual strain amount, thereby reducing the error caused by angle mismatch. This design not only avoids the directional limitations of traditional strain gauges, but also improves measurement accuracy, ensuring high accuracy even in dynamically changing environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The invention is further described with reference to the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without making any creative effort.

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of another perspective of the present invention;

[0020] Figure 3 It is a structural exploded view of the present invention;

[0021] Figure 4 It is a structural exploded view of the present invention from another perspective;

[0022] Figure 5 It is a structural schematic diagram of a circular test plate of the present invention;

[0023] Figure 6 This is a structural schematic diagram of the circular test plate of the present invention from another perspective;

[0024] Figure 7 is a cross-sectional view of the present invention when the first adhesive layer is separated from the circular base;

[0025] Figure 8 This is a cross-sectional view of the first adhesive base layer of the present invention when attached to a circular substrate;

[0026] Among them: 1. circular base; 11. accommodating groove; 12. rotating groove; 13. calibration block; 2. circular shell; 21. rotating column; 3. circular test plate; 31. test hole; 32. handle; 4. longitudinal sensitive grid; 41. longitudinal lead; 5. transverse sensitive grid; 51. transverse lead; 61. floating pin; 62. floating groove; 63. floating spring; 7. first adhesive bottom layer; 71. through hole; 8. second adhesive bottom layer; 91. long connecting rod; 92. short connecting rod. DETAILED DESCRIPTION

[0027] The present invention is further described with reference to the following examples.

[0028] Depend on Figures 1 to 8 As can be seen, the highly adaptable resistive strain gauge described in this embodiment includes a circular base 1 and a circular housing 2 rotatably connected to the circular base 1; a circular test plate 3 is fixedly mounted on the circular housing 2; the circular base 1, the circular housing 2, and the circular test plate 3 are concentrically arranged; and the circular test plate 3 is disposed above the base.

[0029] A longitudinal sensitive grid 4 and a transverse sensitive grid 5 are provided on the top of the circular test plate 3; the longitudinal sensitive grid 4 and the transverse sensitive grid 5 are arranged vertically;

[0030] The circular test plate 3 is provided with a test hole 31; the top of the circular base 1 is provided with a receiving groove 11; the longitudinal sensitive grid 4 and the transverse sensitive grid 5 are both provided with a floating pin 61; the floating pin 61 passes through the test hole 31 and is arranged in the receiving groove 11; the bottom of the circular test plate 3 is provided with a first adhesive layer 7.

[0031] Specifically, when the highly adaptable resistive strain gauge described in this embodiment is in use, the floating pin 61 passes through the test hole 31 and is set in the accommodating groove 11. At this time, there is a gap between the first adhesive layer 7 and the top surface of the circular base 1, and the first adhesive layer 7 does not contact the circular base 1.

[0032] First, the circular base 1 is fixed to the object to be tested. When the surface of the object to be tested is deformed, the circular base 1 transmits the strain force to the longitudinal sensitive grid 4 and the transverse sensitive grid 5 through the cooperation of the accommodating groove 11 and the floating pin 61. The longitudinal sensitive grid 4 and the transverse sensitive grid 5 respectively obtain the vertical component and the horizontal component of the strain force. Based on the magnitude of the vertical component and the horizontal component, the actual direction of the strain force can be calculated.

[0033] Then the circular shell 2 is moved upward, so that the circular test plate 3, the longitudinal sensitive grid 4, the transverse sensitive grid 5, the first adhesive bottom layer 7 and the floating pin 61 are all moved upward, so that the floating pin 61 withdraws from the accommodating groove 11; then the circular shell 2 is rotated according to the actual direction of the strain force, so that the longitudinal sensitive grid 4 is parallel to the direction of the strain force, or the transverse sensitive grid 5 is parallel to the direction of the strain force, and then the circular shell 2 is moved downward. At this time, the floating pin 61 is abutted against the top surface of the circular base 1, that is, the floating pin 61 can be retracted into the longitudinal sensitive grid 4 and the transverse sensitive grid 5, so that the first adhesive bottom layer 7 is in contact with the circular base 1, and the circular base 1 and the circular test plate 3 are firmly connected through the first adhesive bottom layer 7, so that the strain force caused by the deformation of the surface of the object to be tested can be accurately transmitted to the circular test plate 3 through the circular base 1. At this time, the strain of the object to be tested can be measured through the sensitive grid parallel to the direction of the strain force.

[0034] This embodiment obtains horizontal and vertical strain data during the initial measurement process, accurately inferring the force direction and further adjusting the installation direction of the strain gauge so that the measurement direction of one of the sensitive grids is consistent with the direction of the actual strain, thereby reducing errors caused by angular mismatch. This design not only avoids the directional limitations of traditional strain gauges but also improves measurement accuracy, ensuring high accuracy even in dynamically changing environments.

[0035] This embodiment describes a highly adaptable resistive strain gauge. A rotation slot 12 is provided at the center of the top of the circular base 1. A rotation post 21 is provided at the center of the bottom of the circular housing 2. The rotation post 21 passes through the circular test plate 3 and is rotatably connected to the rotation slot 12. Specifically, this arrangement enables the circular housing 2 to rotate stably.

[0036] In this embodiment of a highly adaptable resistive strain gauge, a longitudinal lead 41 is provided through the circular housing 2; the longitudinal lead 41 is connected to the longitudinal sensitive barrier 4. This arrangement facilitates receiving sensing data from the longitudinal sensitive barrier 4 and effectively transmits the sensing data from the longitudinal sensitive barrier 4 to the circular housing 2.

[0037] In this embodiment of a highly adaptable resistive strain gauge, a transverse lead 51 is provided through the circular housing 2 and connected to the transverse sensitive barrier 5. This arrangement facilitates receiving sensing data from the transverse sensitive barrier 5 and effectively transmits the sensing data to the circular housing 2.

[0038] In this embodiment of the highly adaptable resistance strain gauge, a floating groove 62 is provided at the bottom of each of the longitudinal sensitive grid 4 and the bottom of the transverse sensitive grid 5; the floating pin 61 is telescopically disposed within the floating groove 62. A floating spring 63 is provided between the inner wall of the floating groove 62 and the top of the floating pin 61.

[0039] Specifically, through the above-mentioned arrangement, when in use, due to the action of the floating spring 63, the bottom of the floating pin 61 extends out of the floating groove 62, passes through the test hole 31 and is set in the accommodating groove 11. At this time, there is a gap between the first adhesive bottom layer 7 and the top surface of the circular base 1, and the first adhesive bottom layer 7 does not contact the circular base 1.

[0040] When the floating pin 61 abuts against the top surface of the circular base 1, the circular shell 2 moves downward, allowing the floating pin 61 to retract into the floating groove 62, so that the first adhesive layer 7 contacts the circular base 1, and the circular base 1 and the circular test plate 3 are firmly connected through the first adhesive layer 7.

[0041] In this embodiment of a highly adaptable resistive strain gauge, the circular test plate 3 is provided with a handle 32 on its sidewall. This arrangement facilitates the movement and rotation of the circular housing 2. A calibration block 13 is provided on the sidewall of the circular base 1. The calibration block 13 and the handle 32 facilitate the user's observation of the rotation angle of the circular housing 2.

[0042] In the embodiment of the present invention, a highly adaptable resistance strain gauge is provided with a second adhesive layer 8 at the bottom of the circular base 1. This arrangement facilitates a stable connection between the circular base 1 and the object being measured.

[0043] In this embodiment, the highly adaptable resistive strain gauge described herein comprises longitudinal sensitive grids 4 and transverse sensitive grids 5, each comprising alternating long connecting rods 91 and short connecting rods 92. Each short connecting rod 92 is provided with a floating pin 61 in its center. Specifically, this arrangement allows the strain generated by the deformation of the measured object to be effectively transmitted to longitudinal sensitive grids 4 and transverse sensitive grids 5 during initial measurement.

[0044] In the highly adaptable resistive strain gauge described in this embodiment, the first adhesive layer 7 is provided with a through hole 71, and the floating pin 61 is inserted into the through hole 71. Specifically, this arrangement maximizes the area of the first adhesive layer 7, thereby enhancing the stability of the connection between the circular base 1 and the circular test plate 3.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A highly adaptable resistance strain gauge, characterized by: The invention comprises a circular base (1) and a circular shell (2) rotatably connected to the circular base (1); a circular test plate (3) is fixedly provided on the circular shell (2); the circular base (1), the circular shell (2) and the circular test plate (3) are arranged concentrically; the circular test plate (3) is arranged above the base; A longitudinal sensitive grid (4) and a transverse sensitive grid (5) are provided on the top of the circular test plate (3); the longitudinal sensitive grid (4) and the transverse sensitive grid (5) are arranged vertically; The circular test plate (3) is provided with a test hole (31) through it; the top of the circular base (1) is provided with a receiving groove (11); the longitudinal sensitive grid (4) and the transverse sensitive grid (5) are both provided with floating pins (61); the floating pins (61) pass through the test hole (31) and are arranged in the receiving groove (11); the bottom of the circular test plate (3) is provided with a first adhesive layer (7); The bottom of the longitudinal sensitive grid (4) and the bottom of the transverse sensitive grid (5) are both provided with a floating groove (62); the floating pin (61) is telescopically arranged in the floating groove (62); A floating spring (63) is provided between the inner wall of the floating groove (62) and the top of the floating pin (61); The longitudinal sensitive grid (4) and the transverse sensitive grid (5) both comprise long connecting rods (91) and short connecting rods (92) that are alternately connected in sequence; a floating pin (61) is provided in the middle of each short connecting rod (92).

2. The highly adaptable resistance strain gauge according to claim 1, characterized in that: A rotating groove (12) is provided at the center of the top of the circular base (1); a rotating column (21) is provided at the center of the bottom of the circular shell (2); the rotating column (21) passes through the circular test plate (3) and is rotatably connected to the rotating groove (12).

3. The highly adaptable resistance strain gauge according to claim 1, characterized in that: The circular housing (2) is provided with a longitudinal lead (41); the longitudinal lead (41) is connected to the longitudinal sensitive grid (4).

4. The highly adaptable resistance strain gauge according to claim 1, characterized in that: The circular housing (2) is provided with a transverse lead (51); the transverse lead (51) is connected to the transverse sensitive grid (5).

5. The highly adaptable resistance strain gauge according to claim 1, characterized in that: The side wall of the circular test plate (3) is provided with a handle (32); the side wall of the circular base (1) is provided with a calibration block (13).

6. The highly adaptable resistance strain gauge according to claim 1, characterized in that: A second adhesive layer (8) is provided at the bottom of the circular base (1).

7. The highly adaptable resistance strain gauge according to claim 1, characterized in that: The first adhesive layer (7) is penetrated by a through hole (71); the floating pin (61) is passed through the through hole (71).

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