CN214843002U - Integrated ultra-large strain test system based on flexible conductive medium - Google Patents
Integrated ultra-large strain test system based on flexible conductive medium Download PDFInfo
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- CN214843002U CN214843002U CN202121252779.8U CN202121252779U CN214843002U CN 214843002 U CN214843002 U CN 214843002U CN 202121252779 U CN202121252779 U CN 202121252779U CN 214843002 U CN214843002 U CN 214843002U
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Abstract
The utility model provides an integrated ultra-large strain test system based on flexible conductive media, which comprises an integrated board, a tester, a workpiece to be tested and an integrated base film; the integrated substrate film comprises a plurality of groups of substrate films, and a plurality of groups of sensors are fixedly arranged on the substrate films at intervals; one end of the tester is electrically connected with the integrated board, and the integrated board is electrically connected with the integrated sensor of the substrate film; two groups of independent integrated substrate films are connected through a workpiece to be tested. The system adopts the flexible conductive medium to replace metal wires or optical fibers as the resistance element of the sensor and adopts a multilayer overlapping method, so that the system is suitable for measuring the response of structural members under the action of explosion or impact, and can solve the technical problem that the positions of a plurality of sensors cannot be strictly overlapped.
Description
Technical Field
The utility model belongs to the technical field of measure based on foil gage or optical fiber sensor, especially relate to an integrated form super large strain test system based on flexible conductive medium.
Background
The existing mainstream surface stress-strain testing technology generally includes a measurement technology based on a strain gauge or an optical fiber sensor, a measurement technology based on digital speckle, and the like. The measurement based on the strain gauge or the optical fiber sensor is to fix the sensor on the surface of a measured object, the sensor is connected with a signal processing system, each sensor corresponds to one channel, and the strain is measured through resistance change caused by the stretching of the sensor.
The main disadvantages of both of these methods are: 1. due to the fact that metal wires of the strain gauge or optical fibers of the optical fiber sensor are limited in extensibility and small in measuring range, large strain cannot be measured, when the measured object is subjected to overlarge strain or cracking due to explosion or impact, the sensor is damaged, and corresponding data cannot be measured; 2. the number of strain data measured is limited. Each strain value needs one channel, the number of the channels of the signal processing system is limited, so that the strain distribution condition in a certain area cannot be comprehensively measured, and the strain distribution condition cannot be adequately measured when a large number of strain measuring points are needed. 3. To determine the strain at a point, positive strain values in at least three directions at that point are required. When the strain gauge or the optical fiber sensor is used for measurement, because the positions of a plurality of sensors cannot be strictly superposed, the measured strain value is not the strict strain of the same point, and the measurement precision is influenced.
The main disadvantages with the digital speckle method are: the digital speckle method needs to shoot the change condition of the surface speckles before and after the object is deformed by a camera, the object surface and the camera need to be directly visible, and the digital speckle method is not suitable for measuring the condition that the external space of the object surface is narrow or is shielded.
Disclosure of Invention
The technical scheme is as follows: in order to solve the technical problem, the utility model provides a pair of integrated form super large strain test system based on flexible conductive medium, concrete content: integrated form super large strain test system based on flexible conducting medium, its characterized in that: the device comprises an integrated board, a tester, a workpiece to be tested and an integrated substrate film; the integrated substrate film comprises a plurality of groups of substrate films, and a plurality of groups of sensors are fixedly arranged on the substrate films at intervals; one end of the tester is electrically connected with the integrated board, and the integrated board is electrically connected with the integrated sensor of the substrate film; two groups of independent integrated substrate films are connected through a workpiece to be tested.
As another improvement, the resistance element of the sensor adopts a resistance element of a flexible conductive medium structure.
As another improvement, the integrated substrate film comprises a three-layer substrate film integrated and bonded structure, and the structure from bottom to top of the substrate film is as follows: the flexible conductive medium sheet for measuring longitudinal strain is fixedly arranged on the first layer of substrate film, the flexible conductive medium sheet for measuring transverse strain is fixedly arranged at the position, corresponding to the flexible conductive medium sheet of the first layer of substrate film, on the second layer of substrate film, and the flexible conductive medium sheet for measuring oblique strain is fixedly arranged at the position, corresponding to the flexible conductive medium sheet of the second layer of substrate film, on the third layer of substrate film.
As another improvement, the device also comprises a single-channel structure, and the structure is used for scanning and measuring a plurality of strains by using a single channel.
Has the advantages that: the utility model provides a system compares with current conventionality, has following advantage:
(1) aiming at the defect that the metal wire of the strain gauge or the optical fiber of the optical fiber sensor has limited extensibility, a flexible conductive medium is adopted to replace the metal wire or the optical fiber as a resistance element of the sensor. The flexible conductive medium has a much stronger tensile deformation capability than the metal wire, and even when the measured object is subjected to a large strain and even cracks, the flexible conductive medium is not damaged. And is therefore suitable for measuring the response of a structural member under the action of an explosion or impact.
(2) Aiming at the problem that the positions of a plurality of sensors can not be strictly superposed when strain gauges or optical fiber sensors measure the strain of the same point in different directions, a multi-layer superposition method is adopted,
(3) aiming at the problem that the number of channels of a signal processing system is limited and the number of strain values which can be measured simultaneously is influenced, a method for measuring multiple point strains by scanning through a single channel is adopted.
Drawings
Fig. 1 is a schematic structural diagram of the first layer of the integrated base film of the present invention.
Fig. 2 is a schematic structural diagram of the integrated base film of the second layer of the base film of the present invention.
Fig. 3 is a schematic structural diagram of the third layer of the integrated base film according to the present invention.
Fig. 4 is the flexible conductive medium strain sensor after the multi-layer lamination of the integrated substrate film of the present invention.
Fig. 5 is the utility model discloses integrated form super large strain test system principle sketch.
Detailed Description
The following describes the present invention in further detail with reference to examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
An integrated ultra-large strain test system based on a flexible conductive medium comprises the following specific contents: the integrated ultra-large strain test system based on the flexible conductive medium comprises an integrated board 3, a tester 4, a workpiece to be tested 5 and an integrated substrate film; the integrated substrate film comprises a plurality of groups of substrate films, and a plurality of groups of sensors are fixedly arranged on the substrate films at intervals; one end of the tester is electrically connected with the integrated board, and the integrated board is electrically connected with the integrated sensor of the substrate film; two groups of independent integrated substrate films are connected through a workpiece to be tested.
The workpiece to be tested can be an aluminum alloy panel, a steel plate and other testing workpieces, and the flexible conductive medium sheet is a conventional sheet material which can be purchased in the market.
As another improvement, the resistance element of the sensor adopts a resistance element of a flexible conductive medium structure.
As another improvement, the integrated substrate film comprises a three-layer substrate film integrated and bonded structure, and the structure from bottom to top of the substrate film is as follows: the flexible conductive medium sheet 2 for measuring longitudinal strain is fixedly arranged on the first layer of substrate film, the flexible conductive medium sheet 1 for measuring transverse strain is fixedly arranged at the position, corresponding to the flexible conductive medium sheet of the first layer of substrate film, on the second layer of substrate film, and the flexible conductive medium sheet for measuring oblique strain is fixedly arranged at the position, corresponding to the flexible conductive medium sheet of the second layer of substrate film, on the third layer of substrate film.
The flexible conductive medium sheet for measuring longitudinal strain, the flexible conductive medium sheet for measuring transverse strain and the flexible conductive medium sheet for measuring oblique strain are conventional commercially available sheet material structures.
As another improvement, the device also comprises a single-channel structure, and the structure is used for scanning and measuring a plurality of strains by using a single channel.
Aiming at the defect that the metal wire of the strain gauge or the optical fiber of the optical fiber sensor has limited extensibility, a flexible conductive medium is adopted to replace the metal wire or the optical fiber as a resistance element of the sensor. The flexible conductive medium has a much stronger tensile deformation capability than the metal wire, and even when the measured object is subjected to a large strain and even cracks, the flexible conductive medium is not damaged. And is therefore suitable for measuring the response of a structural member under the action of an explosion or impact.
The utility model discloses in, be fixed with the flexible conductive medium thin slice that measures vertical strain on a lot of points on the great basement membrane of area and be figure 1, wherein black fritter is exactly flexible conductive medium thin slice, with the flexible conductive medium thin slice figure 2 of the fixed measurement transverse strain on the point of a same position on the basement membrane of second same area, with the flexible conductive medium thin slice figure 3 of the fixed measurement oblique strain on the point of two preceding same positions on the basement membrane of third same area, then get up three above-mentioned basement membrane coincide and paste together, just so constituted the sensor picture 4 of the multi-point multidirectional strain in the great regional scope of measurable quantity area, the resistive element that measures not equidirectional strain on the different layers of this sensor is strict coincidence. When the sensor is attached to the surface of an object to measure, the same point on the surface of the object has resistance elements for measuring strains in a plurality of directions respectively.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (4)
1. Integrated form super large strain test system based on flexible conducting medium, its characterized in that: the device comprises an integrated board (3), a tester (4), a workpiece to be tested (5) and an integrated substrate film; the integrated substrate film comprises a plurality of groups of substrate films, and a plurality of groups of sensors are fixedly arranged on the substrate films at intervals; one end of the tester is electrically connected with the integrated board, and the integrated board is electrically connected with the integrated sensor of the substrate film; two groups of independent integrated substrate films are connected through a workpiece to be tested.
2. The integrated ultra-large strain test system based on the flexible conductive medium as claimed in claim 1, wherein: the resistance element of the sensor adopts a flexible conductive medium structure.
3. The integrated ultra-large strain test system based on the flexible conductive medium as claimed in claim 1 or 2, wherein: the integrated substrate film comprises three layers of substrate film integrated and pasted structures, and the structure from bottom to top of the substrate film is as follows: the flexible conductive medium sheet (2) for measuring longitudinal strain is fixedly arranged on the first layer of substrate film, the flexible conductive medium sheet (1) for measuring transverse strain is fixedly arranged at the position, corresponding to the flexible conductive medium sheet of the first layer of substrate film, on the second layer of substrate film, and the flexible conductive medium sheet for measuring oblique strain is fixedly arranged at the position, corresponding to the flexible conductive medium sheet of the second layer of substrate film, on the third layer of substrate film.
4. The integrated ultra-large strain test system based on the flexible conductive medium as claimed in claim 1, wherein: the device also comprises a single-channel structure, and the structure is used for scanning and measuring a plurality of strains by adopting a single channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121252779.8U CN214843002U (en) | 2021-06-07 | 2021-06-07 | Integrated ultra-large strain test system based on flexible conductive medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121252779.8U CN214843002U (en) | 2021-06-07 | 2021-06-07 | Integrated ultra-large strain test system based on flexible conductive medium |
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| CN214843002U true CN214843002U (en) | 2021-11-23 |
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| CN202121252779.8U Active CN214843002U (en) | 2021-06-07 | 2021-06-07 | Integrated ultra-large strain test system based on flexible conductive medium |
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2021
- 2021-06-07 CN CN202121252779.8U patent/CN214843002U/en active Active
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