CN221037281U - Annular resistance strain gauge - Google Patents
Annular resistance strain gauge Download PDFInfo
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- CN221037281U CN221037281U CN202321779481.1U CN202321779481U CN221037281U CN 221037281 U CN221037281 U CN 221037281U CN 202321779481 U CN202321779481 U CN 202321779481U CN 221037281 U CN221037281 U CN 221037281U
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- strain gauge
- fixed ring
- pressure
- ring seat
- deformation
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- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Measurement Of Force In General (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses an annular resistance strain gauge, comprising: the strain gauge group is used for sensing stress and generating deformation; the pressure-bearing assembly is used for being connected with the pressure acting part and dispersing acting force on the surface of the strain gauge group; and the resistance sensitive grid bars are used for sensing the deformation of the strain gauge group and converting the deformation signal of the strain gauge group into an electric signal. According to the utility model, through arranging the pressure-bearing assembly structure, the pressure-bearing assembly is utilized to receive external force to push the movable sleeve and the fixed ring seat to generate relative and motion detection deformation, and when the maximum deformation monitoring limit of the resistance sensitive grid is reached, the pressure-bearing surface and the fixed ring seat surface are mutually attached to avoid continuous deformation displacement of the movable sleeve, so that the strain gauge group and the resistance sensitive grid are protected, and the service life of the strain gauge group is prolonged.
Description
Technical Field
The utility model relates to the technical field of resistance strain gauges, in particular to an annular resistance strain gauge.
Background
The ring-shaped resistance strain gauge is a sensor for measuring strain of an object. When an object is stressed or strained, the strain gauge deforms, and the resistance value of the strain resistor changes, so that the strain of the object can be measured. Are commonly used in weighing apparatus to measure the weight of an object.
The existing annular resistance strain gauge mainly comprises a positioning ring, a bearing ring and an elastic connecting strip for connecting the positioning ring and the bearing ring, the strain resistor is attached to the surface of the elastic connecting strip to detect the elastic deformation quantity of the elastic connecting strip, the structure is simple, no protective structure exists, in use, the deformation of an elastic body needs to be kept in a reasonable range, although the elastic body can bear certain deformation, when the elastic body is stressed too much, the elastic body exceeds the elastic limit of the elastic body, permanent deformation or rupture is caused, the sensor is damaged, and the measurement result is inaccurate. There are certain drawbacks.
In view of the above, the present invention has been made in view of the above problems, and an object of the present invention is to provide a ring-shaped resistance strain gauge which solves the problems and improves the practical value by the above technique.
Disclosure of utility model
The present utility model aims to solve one of the technical problems existing in the prior art or related technologies.
The technical scheme adopted by the utility model is as follows: a circular resistance strain gauge comprising: the strain gauge group is used for sensing stress and generating deformation; the pressure-bearing assembly is used for being connected with the pressure acting part and dispersing acting force on the surface of the strain gauge group; and the resistance sensitive grid bars are used for sensing the deformation of the strain gauge group and converting the deformation signal of the strain gauge group into an electric signal.
The present utility model may be further configured in a preferred example to: the strain gauge set comprises a fixed ring seat, a movable ring sleeve and deformation elastic pieces which are integrally formed, wherein the periphery of the movable ring sleeve is connected with the inner side of the fixed ring seat through a plurality of deformation elastic pieces distributed in the circumferential direction, and a gap positioned on the inner side of the fixed ring seat is formed in the periphery of the movable ring sleeve.
The present utility model may be further configured in a preferred example to: the pressure-bearing assembly comprises a pressure-bearing surface, a joint column and a limiting piece which are sequentially connected, wherein the joint column is movably sleeved on the inner side of the movable sleeve, the pressure-bearing surface and the limiting piece are respectively positioned on two sides of the movable sleeve, and the diameter of the limiting piece is larger than that of an inner hole of the movable sleeve and is used for preventing the strain gauge group and the pressure-bearing assembly from separating and falling off.
The present utility model may be further configured in a preferred example to: the resistance sensitive grid bars are positioned in the gaps between the fixed ring seat and the movable ring sleeve, and two ends of the resistance sensitive grid bars are fixedly connected with the surfaces of the fixed ring seat and the movable ring sleeve respectively.
The present utility model may be further configured in a preferred example to: the fixed ring seat and the movable ring sleeve are distributed in a concentric annular mode, the number of the resistance sensitive grid bars is several, the resistance sensitive grid bars are uniformly distributed on the periphery of the movable ring sleeve in the circumferential direction, and the fixed ring seat and the movable ring sleeve are located in the same plane.
The present utility model may be further configured in a preferred example to: the fixed ring seat, the movable ring sleeve and the deformation elastic sheet are integrally punched and formed, and the deformation elastic sheet is in a circular arc strip shape, and two ends of the deformation elastic sheet are respectively connected with the surfaces of the fixed ring seat and the movable ring sleeve in a tangent manner.
The present utility model may be further configured in a preferred example to: the diameter of the pressure bearing surface is the same as that of the fixed ring seat and is arranged in parallel with the surface of the fixed ring seat
The present utility model may be further configured in a preferred example to: the periphery of the joint column is in a spherical arc structure.
The beneficial effects obtained by the utility model are as follows:
1. According to the utility model, through arranging the pressure-bearing assembly structure, the pressure-bearing assembly is utilized to receive external force to push the movable sleeve and the fixed ring seat to generate relative and motion detection deformation, and when the maximum deformation monitoring limit of the resistance sensitive grid is reached, the pressure-bearing surface and the fixed ring seat surface are mutually attached to avoid continuous deformation displacement of the movable sleeve, so that the strain gauge group and the resistance sensitive grid are protected, and the service life of the strain gauge group is prolonged.
2. According to the utility model, the spherical joint column is in sleeved joint with the movable sleeve, the annular contact effectively disperses the acting force contact, and the pressure bearing surface can follow the inclination when the acting force is inclined so as to enable the pressure bearing surface to be in contact with the fixed ring seat in advance, so that damage caused by overlarge stress of the local deformation elastic sheet and the resistance sensitive grid is avoided, and the protection effect on the strain gauge group is further improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;
FIG. 2 is a schematic side view of an embodiment of the present utility model;
FIG. 3 is a schematic view of a strain gage set according to an embodiment of the utility model;
Figure 4 is a schematic view of a pressure bearing assembly according to one embodiment of the present utility model.
Reference numerals:
100. A strain gauge set; 110. a fixed ring seat; 120. a movable sleeve; 130. a deformation elastic sheet;
200. a pressure bearing assembly; 210. a pressure bearing surface; 220. a bond post; 230. a limiting piece;
300. Resistance sensitive grid.
Detailed Description
The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.
A ring-shaped resistance strain gauge provided by some embodiments of the present utility model is described below with reference to the accompanying drawings.
Referring to fig. 1 to 4, the present utility model provides a ring-shaped resistance strain gauge, including: the strain gauge set 100 is used for sensing stress and deforming; a pressure-receiving member 200 for connecting with the pressure-applying portion and dispersing the applied force to the surface of the strain gauge set 100; and a resistive sensing grid 300 for sensing deformation of the set of strain gages 100 to convert the deformation signal of the set of strain gages 100 into an electrical signal.
In this embodiment, the strain gauge set 100 includes a fixed ring seat 110, a movable sleeve 120 and a deformation elastic sheet 130 which are integrally formed, the outer periphery of the movable sleeve 120 is connected with the inner side of the fixed ring seat 110 through a plurality of deformation elastic sheets 130 distributed in the circumferential direction, and a gap located at the inner side of the fixed ring seat 110 is provided at the outer periphery of the movable sleeve 120.
In this embodiment, the pressure-bearing assembly 200 includes a pressure-bearing surface 210, a joint post 220 and a limiting piece 230 connected in sequence, the joint post 220 is movably sleeved on the inner side of the movable sleeve 120, the pressure-bearing surface 210 and the limiting piece 230 are respectively located on two sides of the movable sleeve 120, and the diameter of the limiting piece 230 is larger than that of an inner hole of the movable sleeve 120 to prevent the strain gauge group 100 and the pressure-bearing assembly 200 from separating and falling off.
Further, the resistance sensing grid 300 is located in the gap between the fixed ring seat 110 and the movable ring 120, and two ends of the resistance sensing grid are fixedly connected with the surfaces of the fixed ring seat 110 and the movable ring 120 respectively.
Specifically, the resistance sensing grid 300 senses the relative displacement between the fixed ring seat 110 and the movable ring 120 to generate resistance change, so as to convert the stress signal on the surface of the strain gauge set 100 into an electrical signal.
Further, the fixed ring seat 110 and the movable ring 120 are concentrically distributed, the number of the resistance sensing grid bars 300 is several, and the resistance sensing grid bars are uniformly distributed on the periphery of the movable ring 120 in the circumferential direction, and the fixed ring seat 110 and the movable ring 120 are located in the same plane.
In this embodiment, the fixed ring seat 110, the movable ring cover 120 and the deformation elastic sheet 130 are integrally punched and formed, the deformation elastic sheet 130 is in a circular arc strip shape, and two ends of the deformation elastic sheet are respectively connected with the surfaces of the fixed ring seat 110 and the movable ring cover 120 in a tangential manner.
Further, the diameter of the pressure-bearing surface 210 is the same as that of the fixed ring seat 110 and is parallel to the surface of the fixed ring seat 110
Further, the outer circumference of the engagement post 220 has a spherical circular arc structure.
Specifically, the spherical joint column 220 is in sleeved joint with the movable sleeve 120, the annular contact effectively disperses the acting force contact, and the pressure bearing surface 210 can follow the inclination when the acting force is inclined, so that the pressure bearing surface 210 and the fixed ring seat 110 are contacted in advance, and damage caused by overlarge stress of the local deformation elastic sheet 130 and the resistance sensitive grid 300 is avoided.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.
Claims (8)
1. A circular resistance strain gauge, comprising:
The strain gauge group (100) is used for sensing stress and generating deformation;
A pressure-receiving member (200) for connecting to the pressure-applying portion and dispersing the applied force to the surface of the strain gauge group (100);
and a resistance sensitive grid (300) for sensing deformation of the strain gauge set (100) and converting deformation signals of the strain gauge set (100) into electrical signals;
The pressure-bearing assembly (200) comprises a pressure-bearing surface (210), a joint column (220) and a limiting piece (230) which are sequentially connected, wherein the joint column (220) is movably sleeved on the inner side of the movable sleeve (120), and the pressure-bearing surface (210) and the limiting piece (230) are respectively positioned on two sides of the movable sleeve (120).
2. The annular resistance strain gauge according to claim 1, wherein the strain gauge set (100) comprises a fixed ring seat (110), a movable sleeve (120) and deformation elastic pieces (130) which are integrally formed, the periphery of the movable sleeve (120) is connected with the inner side of the fixed ring seat (110) through a plurality of deformation elastic pieces (130) distributed in the circumferential direction, and a gap positioned at the inner side of the fixed ring seat (110) is formed in the periphery of the movable sleeve (120).
3. An annular resistance strain gauge according to claim 1, wherein the diameter of the limiting piece (230) is larger than the diameter of the inner hole of the movable sleeve (120) for preventing the strain gauge set (100) and the pressure-bearing assembly (200) from separating and falling off.
4. The annular resistance strain gauge according to claim 2, wherein the resistance sensing grid (300) is located in a gap between the fixed ring seat (110) and the movable ring sleeve (120) and two ends of the resistance sensing grid are fixedly connected with surfaces of the fixed ring seat (110) and the movable ring sleeve (120) respectively.
5. The annular resistance strain gauge according to claim 2, wherein the fixed ring seat (110) and the movable ring sleeve (120) are concentrically distributed, the number of the resistance sensing grid bars (300) is several, and the resistance sensing grid bars are uniformly distributed on the periphery of the movable ring sleeve (120) in the circumferential direction, and the fixed ring seat (110) and the movable ring sleeve (120) are located in the same plane.
6. The annular resistance strain gauge according to claim 2, wherein the fixed ring seat (110), the movable sleeve (120) and the deformation elastic sheet (130) are integrally punched and formed, and the deformation elastic sheet (130) is in a circular arc strip shape, and two ends of the deformation elastic sheet are respectively connected with the surfaces of the fixed ring seat (110) and the movable sleeve (120) in a tangent manner.
7. The annular resistance strain gauge according to claim 1, wherein the pressure-bearing surface (210) has the same diameter as the fixed ring seat (110) and is arranged parallel to the surface of the fixed ring seat (110).
8. The gauge according to claim 1, wherein the outer periphery of the joint post (220) has a spherical circular arc structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321779481.1U CN221037281U (en) | 2023-07-07 | 2023-07-07 | Annular resistance strain gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321779481.1U CN221037281U (en) | 2023-07-07 | 2023-07-07 | Annular resistance strain gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221037281U true CN221037281U (en) | 2024-05-28 |
Family
ID=91140780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321779481.1U Active CN221037281U (en) | 2023-07-07 | 2023-07-07 | Annular resistance strain gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221037281U (en) |
-
2023
- 2023-07-07 CN CN202321779481.1U patent/CN221037281U/en active Active
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