Resistance strain gauge

Abstract

The utility model discloses a resistance strain gauge, which comprises an elastic sheet and two resistance sheets respectively arranged on the front and back surfaces of the elastic sheet, the elastic sheet is provided with two positioning through holes along the length direction, the positioning through holes are matched with positioning columns on a working table, and the resistance sheets are provided with corresponding positioning grooves corresponding to the positions of the positioning through holes. The resistor disc and the elastic sheet are accurately assembled into a whole through the positioning arrangement of the open hole and the open slot, and the assembling and bonding are convenient and reliable by combining the positioning column.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and in particular relates to a resistance strain gauge. Background Art

[0002] The resistance strain gauge is a component used to measure strain. It can convert the change of strain on mechanical components into resistance change. The resistance strain gauge is made of Φ=0.02-0.05mm constantan wire or nickel-chromium wire wound into a grid shape (or corroded into a grid shape with a very thin metal foil) and sandwiched between two layers of insulating thin sheets (substrate), and connected to the strain gauge wire grid with silver-plated copper wire as the resistance gauge lead. Therefore, the resistance strain gauge is a three-piece bonding structure. In the traditional production process, the upper and lower pieces are directly bonded to the upper and lower surfaces of the middle piece by manual glue coating. This installation method of directly placing the upper or lower piece on the glue area on the middle piece by manual operation, due to the viscosity of the glue, the upper or lower piece is easy to slide and shift during placement, and cannot be accurately installed to the specific position of the middle piece. Summary of the invention

[0003] The utility model aims to provide a resistance strain gauge to address the defects of the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: a resistance strain gauge, including an elastic sheet and two resistance sheets respectively installed on the front and back sides of the elastic sheet, the elastic sheet is provided with two positioning through holes along the length direction, the positioning through holes are adapted to the positioning columns on the work table, and the resistance sheet is provided with a corresponding positioning groove corresponding to each positioning through hole position.

[0005] Furthermore, an adhesive layer is provided between the resistor sheet and the elastic sheet.

[0006] Furthermore, the sizes of different positioning through holes are different.

[0007] Furthermore, the positioning groove is located at the edge of the resistor.

[0008] Furthermore, there are at least two positioning grooves, which are arranged at two symmetrical edges of the resistor sheet.

[0009] Furthermore, the positioning groove is an arc-shaped groove, and the arc circumference of the arc-shaped groove is less than or equal to 1 / 2 of the circumference of the positioning through hole.

[0010] Furthermore, any one of the positioning through holes is an oblong hole, and the length direction of the oblong hole is arranged along the length direction of the elastic sheet.

[0011] Furthermore, the width of the resistor is less than or equal to the width of the resistor.

[0012] Furthermore, a fixing through hole is provided at one end of the elastic sheet.

[0013] Furthermore, the elastic sheet is a metal sheet.

[0014] Furthermore, at least one auxiliary through hole is punched in the width direction of any positioning through hole of the elastic sheet, an auxiliary groove corresponding to the position of the auxiliary through hole is opened on the electrode sheet, and an auxiliary positioning column adapted to the auxiliary through hole is provided on the work surface.

[0015] By adopting the technical scheme of the utility model, the beneficial effects of the utility model are as follows: the resistor sheet and the elastic sheet are accurately assembled into one through the positioning setting of the opening and slotting, and the assembly and bonding are convenient and reliable in combination with the positioning column; when the elastic sheet and the resistor sheet are assembled, at least two positioning columns on the work table are passed through the positioning through holes to fix the resistor sheet, and then the positioning groove of the resistor sheet is slid along the outer periphery of the positioning column to the upper surface or the lower surface of the resistor sheet, so that the position of the resistor sheet and the elastic sheet are accurately aligned, and the resistor sheet and the elastic sheet are bonded and fixed together by the adhesive layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the assembly of a resistance strain gauge and a positioning column of a structure;

[0017] Figure 2 It is a disassembled state diagram of a resistance strain gauge of a structure;

[0018] Figure 3 This is a top view of a resistance strain gauge with another structure.

[0019] In the figure: 1 elastic sheet, 11 positioning through hole, 12 fixing through hole, 13 arc groove, 14 auxiliary through hole, 2 resistor sheet, 21 positioning groove, 22 auxiliary groove, 3 positioning column, 31 auxiliary positioning column. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described and explained below through specific embodiments, so that the utility model is clearer and more understandable. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0021] Example 1

[0022] like Figure 1-2As shown, this embodiment relates to a resistance strain gauge, including an elastic sheet 1 and two resistance sheets 2 respectively installed on the front and back sides of the elastic sheet, the elastic sheet 1 is provided with two positioning through holes 11 along the length direction, the positioning through holes are adapted to the positioning columns 3 on the work surface, and the resistance sheet 2 is provided with a corresponding positioning groove 21 corresponding to the position of each positioning through hole 11.

[0023] An adhesive layer is provided between the resistor sheet 2 and the elastic sheet 1. The resistor sheet 2 and the elastic sheet 1 are bonded together by the adhesive.

[0024] Different positioning through holes 11 have different sizes. By setting two positioning holes with different properties, it is convenient to place the elastic sheet 1 accurately and in a directional manner.

[0025] As a preferred embodiment, the positioning post 3 is interference-fitted with the positioning through hole 11 to ensure that the elastic sheet 1 can be placed on the positioning post 3 without falling off.

[0026] The positioning grooves 21 in the resistor sheet 2 are located at the edge of the resistor sheet 2. There are at least two positioning grooves 21, which are arranged at two symmetrical edges of the resistor sheet 2.

[0027] The positioning groove 11 in the resistor sheet 2 is an arc-shaped groove, and the arc circumference of the arc-shaped groove is less than or equal to 1 / 2 of the circumference of the positioning through hole 11 .

[0028] Any positioning through hole 11 in the elastic sheet 1 is an oblong hole, the length direction of the oblong hole is arranged along the length direction of the elastic sheet 1, and the positioning column adapted thereto is also a column with an oblong hole in cross section.

[0029] The width of the resistor 2 is less than or equal to the width of the resistor.

[0030] The elastic sheet 1 has a fixing through hole 12 at one end and an arc groove 13 at the other end. The fixing through hole 12 facilitates the entire resistance strain gauge to be fixedly mounted on any cylinder for storage in the later stage, and the arc groove 13 reduces the weight of the resistance strain gauge product.

[0031] The elastic sheet 1 is made of metal sheet.

[0032] Example 2

[0033] like Figure 3 As shown, different from the embodiment 1, the resistance strain gauge of this embodiment punches at least one auxiliary through hole 14 along the width direction on any positioning through hole 11 of the elastic sheet 1, an auxiliary groove 22 corresponding to the position of the auxiliary through hole 14 is provided on the electrode sheet 2, and an auxiliary positioning column 31 adapted to the auxiliary through hole is provided on the work surface. The aperture of the auxiliary through hole 14 on the elastic sheet 1 can be the same as or different from the aperture of the positioning through hole in the width direction, and the corresponding auxiliary groove 22 and the positioning through hole in the width direction can be the same as or different from the aperture of the auxiliary through hole 14 on the elastic sheet 1.

[0034] An auxiliary through hole is added in the width direction to cooperate with the two positioning through holes to achieve three-point positioning of the triangle. Before the bonding operation of the resistance strain gauge, the elastic sheet can be accurately fixed on the work surface, which is more accurate and avoids displacement.

[0035] It should be noted that the illustrations provided in the above embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0036] The above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments. The present invention may also include more other equivalent embodiments, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. Resistance strain gauge, characterized in that: It comprises an elastic sheet and two resistor sheets respectively installed on the front and back sides of the elastic sheet. The elastic sheet is provided with two positioning holes along the length direction. The positioning holes are adapted to the positioning columns on the workbench. The resistor sheet is provided with corresponding positioning grooves corresponding to the positions of the positioning holes.

2. The resistance strain gauge according to claim 1, characterized in that: An adhesive layer is arranged between the resistor sheet and the elastic sheet.

3. The resistance strain gauge according to claim 1, characterized in that: Different positioning through holes have different sizes.

4. The resistance strain gauge according to claim 1, characterized in that: The positioning groove is located at the edge of the resistor sheet.

5. The resistance strain gauge according to claim 4, characterized in that: There are at least two positioning grooves, which are arranged at two symmetrical edges of the resistor sheet.

6. The resistance strain gauge according to claim 4, characterized in that: The positioning groove adopts an arc groove, and the arc circumference of the arc groove is less than or equal to 1 / 2 of the circumference of the positioning through hole.

7. The resistance strain gauge according to claim 1, characterized in that: Any positioning through hole is an oblong hole, and the length direction of the oblong hole is arranged along the length direction of the elastic sheet.

8. The resistance strain gauge according to claim 1, characterized in that: The width of the resistor sheet is less than or equal to the width of the resistor sheet.

9. The resistance strain gauge according to claim 1, characterized in that: The elastic sheet is a metal sheet.

10. The resistance strain gauge according to any one of claims 1 to 9, characterized in that: At least one auxiliary through hole is punched in the width direction of any positioning through hole of the elastic sheet, an auxiliary groove corresponding to the position of the auxiliary through hole is opened on the electrode sheet, and an auxiliary positioning column adapted to the auxiliary through hole is provided on the work table.

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