CN212007617U - Three-dimensional stress measurement strain gauge - Google Patents
Three-dimensional stress measurement strain gauge Download PDFInfo
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- CN212007617U CN212007617U CN201922124001.8U CN201922124001U CN212007617U CN 212007617 U CN212007617 U CN 212007617U CN 201922124001 U CN201922124001 U CN 201922124001U CN 212007617 U CN212007617 U CN 212007617U
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- strain gauge
- strainometer
- strain
- gauge
- dimensional stress
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Abstract
The utility model discloses a three-dimensional stress measurement strainometer, which comprises a substrate, be equipped with first strainometer, second strainometer and third strainometer on the basement, second strainometer is overlapped on first strainometer, and the third strainometer is established on the second strainometer for first strainometer, second strainometer and third strainometer form laminated structure, and the orientation direction of first strainometer, second strainometer and third strainometer is different, the central point coincidence setting of first strainometer, second strainometer and third strainometer. The utility model discloses can carry out the measurement of the stress of a plurality of directions to the same position of test piece, improve measurement of efficiency, it is nimble more convenient to use.
Description
Technical Field
The utility model relates to a strainometer, specifically speaking are three-dimensional stress measurement strainometer.
Background
The strain of the object is a very important geometrical parameter, and the accurate measurement of the strain is very important. A strain sensor is a type of sensor used to measure the strain produced by the deformation of an object under force. Resistive strain gauges are the most commonly used sensing elements. It is a sensing element that can convert changes in strain on a mechanical member into changes in resistance. Strain sensors are widely available in many types, including resistive, capacitive, piezoelectric, inductive, and optical, by principle. A resistive strain sensor. Strain gauges act as a measurement device on the sensor, which often determines the quality of the entire sensor.
Due to the structural arrangement design of the wire grids, the conventional strain gauge can only realize stress measurement in one-dimensional direction at the same position of a test piece, so that the conventional strain gauge brings great invariance to practical application.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a three-dimensional stress measurement strainometer.
In order to solve the technical problem, the utility model discloses take following technical scheme:
a three-dimensional stress measurement strain gauge comprises a substrate, wherein a first strain gauge, a second strain gauge and a third strain gauge are arranged on the substrate, the second strain gauge is stacked on the first strain gauge, the third strain gauge is arranged on the second strain gauge, so that the first strain gauge, the second strain gauge and the third strain gauge form a stacked structure, and the orientation directions of the first strain gauge, the second strain gauge and the third strain gauge are different.
And the central points of the first strain gauge, the second strain gauge and the third strain gauge are coincided.
The first strain gauge is arranged on the substrate, the first strain gauge is used as a reference standard, the second strain gauge is arranged at the 45-degree position of the first strain gauge, the third strain gauge is arranged at the 90-degree position of the first strain gauge, and the first strain gauge and the third strain gauge are vertically arranged.
The second strain gauge is oriented at plus 45 degrees or minus 45 degrees with the first strain gauge as a reference.
And a modified phenolic resin protective film is arranged on the third strain gauge.
The second strain gauge is adhered to the first strain gauge through glue, and the third strain gauge is adhered to the second strain gauge through glue.
The utility model discloses can carry out the measurement of the stress of a plurality of directions to the same position of test piece, improve measurement of efficiency, it is nimble more convenient to use.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic view of the orientation of a first strain gauge of the present invention;
FIG. 3 is a schematic view of the orientation of a second strain gauge of the present invention;
fig. 4 is a schematic view of the orientation of the third strain gauge of the present invention.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in fig. 1-4, the utility model discloses a three-dimensional stress measurement strainometer, including the basement, be equipped with first strainometer 21, second strainometer 22 and third strainometer 23 on the basement 1, second strainometer 22 is overlapped on first strainometer 21, and third strainometer 23 is established on second strainometer 22 for first strainometer 21, second strainometer 22 and third strainometer 21 form laminated structure, and the orientation direction of first strainometer, second strainometer and third strainometer is different, and the central point coincidence setting of first strainometer, second strainometer and third strainometer. Thereby ensuring stress measurements in three directions simultaneously.
The first strain gauge is arranged on the substrate, the first strain gauge is used as a reference standard, the second strain gauge is arranged at the 45-degree position of the first strain gauge, the third strain gauge is arranged at the 90-degree position of the first strain gauge, and the first strain gauge and the third strain gauge are vertically arranged. The second strain gauge is oriented at plus 45 degrees or minus 45 degrees with the first strain gauge as a reference.
The second strain gauge is adhered to the first strain gauge through glue, and the third strain gauge is adhered to the second strain gauge through glue.
As shown in fig. 1, the first strain gauge is pasted on the substrate vertically, and the pointing direction is defined as 0 degree; the second strain gauge is arranged at 45 degrees on the left side of the first strain gauge, and can be at 45 degrees on the right side; the third strain gauge is perpendicular to the first strain gauge and is 90 degrees, the centers of the three strain gauges are overlapped to form an integral strain gauge, the strain gauges in three directions are respectively connected to a stress tester to form a Wheatstone bridge after the strain gauges are attached to a test piece, and simultaneous measurement of the stress of the test piece in three different directions at the same position is realized.
During specific manufacturing, after the constantan foil is pasted on a prefabricated titanium frame, the modified phenolic resin is thrown and placed in an oven to be cured according to a specific process temperature. After the substrate is cured, throwing photoresist on the metal foil, drying, exposing and developing the 0-degree strain gauge graph, the 45-degree strain gauge graph and the 90-degree strain gauge graph, respectively, placing the patterns into an etching machine, and performing precise resistance adjustment after etching and forming. And trimming the 0-degree strain gauge with the resistance adjusted to be strip-shaped for later use. And coating a layer of glue on the substrate of the 45-degree strain gauge with the adjusted resistance, drying, and trimming into a single strain gauge for later use. And adding a protective film on the 90-degree strain gauge with the resistance adjusted by using a modified phenolic resin film cover layer, coating a layer of glue on the substrate of the 90-degree strain gauge, drying, and trimming into a single strain gauge for later use. The 45 degree strain gage is glued to the 0 degree strain gage at the 45 degree position. And sticking the 90-degree strain gauges to the 90-degree positions of the 0-degree strain gauges, stacking the three strain gauges at 0 degree, 45 degrees and 90 degrees, putting the three strain gauges into a special fixture for pressurization and thermal curing, trimming after curing, and sorting resistance values to obtain the finished strain gauges.
The formed strain gauge with the three-layer structure is of a three-dimensional structure, and the three-dimensional stress of 0 degree, 45 degrees and 90 degrees at the same position of a test piece can be measured simultaneously.
It should be noted that the above is only a preferred embodiment of the present invention, and the present invention is not limited to the above, and although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that the technical solutions described in the foregoing embodiments can be modified or some technical features can be replaced with equivalents, but any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The three-dimensional stress measurement strain gauge comprises a substrate and is characterized in that a first strain gauge, a second strain gauge and a third strain gauge are arranged on the substrate, the second strain gauge is stacked on the first strain gauge, the third strain gauge is arranged on the second strain gauge, so that the first strain gauge, the second strain gauge and the third strain gauge form a stacked structure, and the orientation directions of the first strain gauge, the second strain gauge and the third strain gauge are different.
2. The three-dimensional stress-measuring strain gauge according to claim 1, wherein the center points of the first, second and third strain gauges are coincident.
3. The strain gauge of claim 2, wherein the first strain gauge is positioned on the substrate with reference to the first strain gauge, the second strain gauge is positioned at 45 degrees to the first strain gauge, the third strain gauge is positioned at 90 degrees to the first strain gauge, and the first strain gauge and the third strain gauge are vertically aligned.
4. The strain gage of claim 3 wherein the second strain gage is oriented at either a positive 45 degrees or a negative 45 degrees with the first strain gage as a reference.
5. The three-dimensional stress-measuring strain gauge according to claim 4, wherein a modified phenolic resin protective film is provided on the third strain gauge.
6. The three dimensional stress measuring strain gage of claim 5 wherein the second strain gage is attached to the first strain gage by glue and the third strain gage is attached to the second strain gage by glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922124001.8U CN212007617U (en) | 2019-12-02 | 2019-12-02 | Three-dimensional stress measurement strain gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922124001.8U CN212007617U (en) | 2019-12-02 | 2019-12-02 | Three-dimensional stress measurement strain gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212007617U true CN212007617U (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922124001.8U Active CN212007617U (en) | 2019-12-02 | 2019-12-02 | Three-dimensional stress measurement strain gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212007617U (en) |
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2019
- 2019-12-02 CN CN201922124001.8U patent/CN212007617U/en active Active
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