CN212479831U - Surface strain gauge pasting and mounting device - Google Patents
Surface strain gauge pasting and mounting device Download PDFInfo
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- CN212479831U CN212479831U CN202020585514.9U CN202020585514U CN212479831U CN 212479831 U CN212479831 U CN 212479831U CN 202020585514 U CN202020585514 U CN 202020585514U CN 212479831 U CN212479831 U CN 212479831U
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- strain gauge
- shell
- supporting platform
- piston body
- mounting device
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Abstract
The utility model discloses a surface strain gauge sticking and mounting device, which comprises a shell and a piston body; the bottom of the piston cavity is provided with an air inlet and an air outlet which can be communicated with a first air source through a first air path pipe; the upper end of the shell is provided with an opening which can be matched and attached to the surface of a test plate; the upper end of the piston body is provided with a strain gauge supporting platform; when the upper end of the shell is matched with the surface of the test plate and the piston body moves outwards, the strain gauge can be pressed on the surface of the test plate; an air path channel is arranged in the piston body and the strain gauge supporting platform, the upper end opening of the air path channel is matched with the strain gauge in position, and the lower end opening of the air path channel can be communicated with a second air source through a second air path pipe; when negative pressure is generated in the air passage through the second air source, the strain gauge placed on the strain gauge supporting platform can be fixedly adsorbed. The utility model discloses an installation device can press, paste predetermined test surface with surface strain gauge equilibrium more accurately with predetermined time, pressure, has improved work precision and work efficiency greatly.
Description
Technical Field
The utility model relates to a detection device especially relates to a surface strain's detection device.
Background
At present, with the rapid development of a strain acquisition and detection technology, the technology is widely applied to various industries. In the process of strain test, a resistance-type strain gauge is generally used for strain acquisition, the strain gauge is an element for measuring strain, such as a sensitive grid, and the like, and is firmly adhered to a measuring point of a member when in use, the resistance of the sensitive grid is changed along with the deformation of the measuring point due to the strain of the measuring point after the member is stressed, and then the resistance change is measured by a special instrument and converted into a strain value of the measuring point.
In the traditional strain measuring point fixing method, the central position of a measuring point is determined by a cross line drawn on the surface of the measuring point in advance, and a tester directly aligns and pastes the measuring point by hand. The method only depends on visual inspection of a tester and touch feeling for alignment and pressing, accurate positioning, accurate timing and standard fixed force pasting of the strain gauges cannot be achieved, and a large number of problems exist in the collected data in the practical case, including low efficiency caused by direction deviation of the strain gauges, deviation error of a central point, overlong pressing time and overlarge pressing force of the strain gauges, falling caused by too short pressing time and overlong pressing force of the strain gauges, different pressing time and force of each strain gauge, and the accuracy of data collection is directly caused. And the traditional method can not realize standard quantification and has low efficiency.
The fixing method of the stress-strain measuring point in the prior art has defects in the aspects, so that the novel mounting (pasting) device of the ferromagnetic metal material surface strain gauge is provided to quantify the pasting process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a surface strain gauge pastes installation device is provided, can press, paste the surface strain gauge at predetermined test surface with predetermined time, pressure more accurately with the equilibrium, improved work precision and work efficiency greatly.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
a surface strain gauge sticking and mounting device comprises a shell and a piston body, wherein the piston body is arranged in an inner cavity of the shell in a matching manner, is circumferentially limited and can axially move in the shell in a piston manner;
a closed piston cavity is formed between the piston body and the bottom of the shell, an air inlet and outlet is formed in the bottom of the piston cavity, and the air inlet and outlet can be communicated with a first air source through a first air path pipe;
the upper end of the shell is provided with an opening which can be matched and attached to the surface of a test plate; an exhaust structure is arranged at the upper part of the shell to prevent the operation of the piston body from being blocked after the upper end opening of the shell is matched and attached with the surface of the test plate;
the upper end of the piston body is provided with a strain gauge supporting platform, and the strain gauge can be placed on the strain gauge supporting platform in a matching manner; when the upper end opening of the shell is matched and attached to the surface of a test plate and the piston body moves outwards, the strain gauge supporting platform can press the strain gauge placed on the strain gauge supporting platform on the surface of the test plate in a matching manner;
an air path channel is arranged in the piston body and the strain gauge supporting platform, an opening at the upper end of the air path channel is matched with the position where the strain gauge is placed, and an opening at the lower end of the air path channel can be communicated with a second air source through a second air path pipe; when negative pressure is generated in the air path channel through the second air source, the strain gauge placed on the strain gauge supporting platform can be adsorbed and fixed, and the strain gauge is prevented from shifting and falling off.
Further, the opening at the upper end of the shell is also provided with a magnetic positioning body, and when the test board is a magnetic adsorption material, the magnetic positioning body is used for fixing the mounting device on the surface of the test board in an adsorption manner.
Further, a shell positioning mark is arranged at an opening at the upper end of the shell and is used for being in coincident alignment with a cross reference line of the surface of the test plate at a set patch position; a strain gauge positioning mark is arranged on the strain gauge supporting platform, and the strain gauge can be matched, positioned and placed at a position designated by the strain gauge positioning mark; according to the shell positioning mark and the strain gauge positioning mark, the strain gauge accurately placed at the designated position of the strain gauge supporting platform can be accurately pressed on the set patch position on the surface of the test plate.
Furthermore, the exhaust structure is an operation window arranged on the shell.
Further, the operation window is a downward notch arranged at an opening at the upper end of the shell.
Further, the strain gauge supporting platform is of a detachable structure and is detachably and fixedly installed at the upper end of the piston body.
Furthermore, an air path pipe needle is further arranged, the air path channel is an internal channel of the air path pipe needle, the air path pipe needle is fixedly arranged in the piston body and the strain gauge supporting platform, and the lower end of the air path pipe needle is connected with the second air path pipe.
Further, a pressure control device is arranged on the first air path pipe, the first air source can be controlled to keep the pipeline gas pressure constant at a set value, and the first air source can be controlled to unload the pressure after the pipeline gas pressure reaches the set value and the pressure is kept for a set time.
Further, the cross-sectional shapes of the shell and the piston body are square.
The utility model discloses a surface strain gauge pastes installation device has utilized piston structure ingeniously, exerts pressure through first air supply and can drive the piston body and outwards remove, presses the strainometer of placing on strainometer supporting platform according to technical requirement and puts on experimental panel surface to the matching. The whole pasting process can be quantitatively operated, the pasting action positioning of the strain gauge is stable and controllable, the balance of pressing force to the strain gauge and the stable and controllable pressing time are ensured, the pasting efficiency, the accuracy and the stability of the strain gauge are greatly improved, and the accuracy of strain acquisition detection data is also greatly improved.
The second air source passes through the air passage, can stably adsorb and fix the strainometer placed on the strainometer supporting platform, prevent that it from producing the aversion and droing and influencing the location and the follow-up detection of strainometer.
After the operation window is opened on casing upper portion, made things convenient for to adsorb the work surface coating that fixes the strainometer on strainometer supporting platform and added glue, also made things convenient for the operator to observe the state of strainometer so that can in time adjust, played the effect of exhaust passage simultaneously, also prevented upper portion cavity production pressure or negative pressure when the piston body operation, the piston body operation that leads to is obstructed, influences the paster effect even.
And pressure control device's setting for can keep predetermined time under the constant pressure to the pressure of strain gauge, prevent that excessive pressure or under-pressure and applied pressure time are too long or too short, can set up simultaneously and report device buzzing warning (warning personnel go to carry out follow-up operation) and stop applying pressure after reaching the settlement time, make the paster operation more quantitative accurate, thereby improve the stability and the accuracy nature of paster.
Drawings
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:
fig. 1 is one of the structural schematic diagrams of the surface strain gauge attaching and mounting device of the present invention.
Fig. 2 is a second schematic structural view of the surface strain gauge attaching and mounting device of the present invention.
In the figure:
1. housing 2, piston body
3. Piston cavity 4 and first air path pipe
5. Test plate 6 and operation window
7. Strain gauge 8 and strain gauge supporting platform
9. Air passage pipe needle 10 and second air passage pipe
11. Magnetic positioning body
Detailed Description
The invention is described in further detail below with reference to the following figures and examples:
fig. 1 and 2 show a surface strain gauge sticking and mounting device, which comprises a housing 1 and a piston body 2, wherein the cross-sectional shapes of the housing 1 and the piston body 2 are both square, the piston body 2 is arranged in an inner cavity of the housing 1 in a matching manner, can perform piston motion in the housing 1 along the axial direction in a circumferential limiting manner, and certainly, in order to enable the piston body 2 to move in the housing 1 in the circumferential limiting manner. The casing 1 and the piston body 2 may also be of other cross-sectional shapes, such as rectangular, polygonal, etc.; alternatively, a circular shape may be used, but an axially extending guide structure is used to limit the circumferential movement between the piston body 2 and the housing 1.
A closed piston cavity 3 is formed between the piston body 2 and the bottom of the shell 1, and an air inlet and outlet is arranged at the bottom of the piston cavity 3 and can be communicated with a first air source through a first air path pipe 4. The piston body 2 is driven to move up and down by air intake or air exhaust of the first air source into the piston cavity 3, and meanwhile, the magnitude of the air intake pressure of the first air source into the piston cavity 3 determines the magnitude of the pressure of the strain gauge supporting platform 8 on the strain gauge 7.
The first gas circuit pipe is provided with a pressure control device which can control the first gas source to keep the pipeline gas pressure constant at a set value and can control the first gas source to unload the pressure after the pipeline gas pressure reaches the set value and keeps the pressure for a set time (60 seconds).
Of course, the pressure control device may not be included in the product, and the user may separately dispose the pressure control device and the air source device after obtaining the surface strain gauge attaching and mounting device of the present invention.
The upper end of the shell 1 is provided with an opening and can be matched and attached to the surface of a test plate 5; an exhaust structure is arranged at the upper part of the shell 1 to prevent the operation of the piston body 2 from being blocked after the upper end opening of the shell 1 is matched and attached with the surface of the test plate 5; the exhaust structure is an operation window 6 arranged on the shell, the operation window 6 is a downward square notch arranged at an opening at the upper end of the shell, an operator can conveniently apply glue on the strain gauge, the operator can conveniently observe the state of the strain gauge 7 so as to adjust the state in time, and an exhaust channel is used for preventing the upper cavity from generating pressure or negative pressure when the piston body 2 runs, so that the running of the piston body 2 is prevented from being blocked and even the paster effect is influenced. Naturally, due to the difference between the design and the requirements, the operation window 6 may not be provided, but the gluing, the observation and the adjustment are operated through the upper end opening of the casing 1, and meanwhile, the upper portion of the casing 1 may be provided with an exhaust hole, or the upper end opening of the casing 1 may be provided with an exhaust groove, etc., as long as the operation of the piston body 2 is prevented from being blocked after the upper end opening of the casing 1 is matched and attached to the surface of the test board 5.
A strain gauge supporting platform 8 is arranged at the upper end of the piston body 2, and a strain gauge 7 can be placed on the strain gauge supporting platform 8 in a matching manner; and when the upper end opening of the shell 1 is matched and attached to the surface of the test plate 5 and the piston body 2 moves outwards, the strain gauge supporting platform 8 can press the strain gauge 7 placed on the strain gauge supporting platform onto the surface of the test plate 5 in a matching manner.
The mounting device is further provided with an air path pipe needle 9, the air path pipe needle 9 is fixedly arranged in the piston body 2 and the strain gauge supporting platform 8, and a lower port of the air path pipe needle 8 can be communicated with a second air source through a second air path pipe 10. The upper end opening of the air channel tube needle 9 is matched with the position where the strain gauge 7 is placed (in the center of the position where the strain gauge 7 is placed); when negative pressure is generated in the air passage channel inside the air passage tube needle 9 through the second air source, the strain gauge 7 placed on the strain gauge supporting platform 8 can be fixedly adsorbed, and the strain gauge 7 is prevented from shifting and falling off.
Naturally, the air path tube needle 9 may not be provided due to the difference in design, but an air path channel is directly formed in the piston body 2 and the strain gauge support platform, an opening at the upper end of the air path channel is matched with the position where the strain gauge is placed, an opening at the lower end of the air path channel is communicated with a second air source through a second air path tube 10, and the strain gauge 7 placed on the strain gauge support platform 8 can be adsorbed and fixed as long as negative pressure is generated in the air path channel by the second air source.
The opening at the upper end of the shell 1 is provided with a magnetic positioning body 11, and when the test plate 5 is a magnetic adsorption material, the magnetic positioning body is used for fixing the mounting device on the surface of the test plate 5 in an adsorption manner. The magnetic positioning body 11 is fixed at the opening at the upper end of the shell 1 through glue or clamped. Of course, when the test plate 5 is a non-magnetic adsorbent, the magnetic positioner 11 may not be provided.
And a shell positioning mark of a V-shaped groove is arranged at an opening at the upper end of the shell 1. When the magnetic positioning body 11 is present, the shell positioning mark is preferably arranged on the upper end face of the magnetic positioning body 11; when the magnetic positioning body 11 is not provided, the housing positioning mark is provided on the upper end surface of the housing 1. When the cross reference line of the patch position of the strain gauge 7 is set on the surface of the test plate 5, the shell positioning mark is used for being aligned with the cross reference line in a superposition mode.
A strain gauge positioning mark is arranged on the strain gauge supporting platform 8, and the strain gauge 7 can be matched, positioned and placed at a position designated by the strain gauge positioning mark; according to the shell positioning mark and the strain gauge positioning mark, the strain gauge 7 accurately placed at the designated position of the strain gauge supporting platform 8 can be accurately pressed on the set patch position on the surface of the test plate 5.
Of course, depending on design or technical requirements, the housing positioning mark and the strain gauge positioning mark may not be provided if the strain gauge 7 is attached only to some region of the test plate 5 and does not need to be accurately positioned.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A surface strain gauge pasting and mounting device is characterized in that: the piston body is arranged in an inner cavity of the shell in a matching manner, can perform piston motion in the shell along the axial direction in a circumferential limiting manner;
a closed piston cavity is formed between the piston body and the bottom of the shell, an air inlet and outlet is formed in the bottom of the piston cavity, and the air inlet and outlet can be communicated with a first air source through a first air path pipe;
the upper end of the shell is provided with an opening which can be matched and attached to the surface of a test plate; an exhaust structure is arranged at the upper part of the shell to prevent the operation of the piston body from being blocked after the upper end opening of the shell is matched and attached with the surface of the test plate;
the upper end of the piston body is provided with a strain gauge supporting platform, and the strain gauge can be placed on the strain gauge supporting platform in a matching manner; when the upper end opening of the shell is matched and attached to the surface of a test plate and the piston body moves outwards, the strain gauge supporting platform can press the strain gauge placed on the strain gauge supporting platform on the surface of the test plate in a matching manner;
an air path channel is arranged in the piston body and the strain gauge supporting platform, an opening at the upper end of the air path channel is matched with the position where the strain gauge is placed, and an opening at the lower end of the air path channel can be communicated with a second air source through a second air path pipe; when negative pressure is generated in the air path channel through the second air source, the strain gauge placed on the strain gauge supporting platform can be adsorbed and fixed, and the strain gauge is prevented from shifting and falling off.
2. The mounting device of claim 1, wherein: the opening part at the upper end of the shell is also provided with a magnetic positioning body, and when the test board is a magnetic adsorption material, the magnetic positioning body is used for fixing the mounting device on the surface of the test board in an adsorption manner.
3. The mounting device of claim 1, wherein: a shell positioning mark is arranged at an opening at the upper end of the shell and is used for being superposed and aligned with a cross reference line of the surface of the test plate at a set patch position; a strain gauge positioning mark is arranged on the strain gauge supporting platform, and the strain gauge can be matched, positioned and placed at a position designated by the strain gauge positioning mark; according to the shell positioning mark and the strain gauge positioning mark, the strain gauge accurately placed at the designated position of the strain gauge supporting platform can be accurately pressed on the set patch position on the surface of the test plate.
4. The mounting device of claim 1, wherein: the exhaust structure is an operation window arranged on the shell.
5. The mounting device of claim 4, wherein: the operation window is a downward notch arranged at an opening at the upper end of the shell.
6. The mounting device of any one of claims 1 to 5, wherein: the strain gauge supporting platform is of a detachable structure and is detachably and fixedly installed at the upper end of the piston body.
7. The mounting device of claim 6, wherein: the gas circuit tube needle is fixedly arranged in the piston body and the strain gauge supporting platform, and the lower end of the gas circuit tube needle is connected with the second gas circuit tube.
8. The mounting device of claim 6, wherein: the first air path pipe is provided with a pressure control device which can control the first air source to keep the pipeline gas pressure constant at a set value and can control the first air source to unload the pressure after the pipeline gas pressure reaches the set value and keeps the pressure for a set time.
9. The mounting device of claim 6, wherein: the cross-sectional shapes of the shell and the piston body are both square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020585514.9U CN212479831U (en) | 2020-04-17 | 2020-04-17 | Surface strain gauge pasting and mounting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020585514.9U CN212479831U (en) | 2020-04-17 | 2020-04-17 | Surface strain gauge pasting and mounting device |
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| Publication Number | Publication Date |
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| CN212479831U true CN212479831U (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020585514.9U Active CN212479831U (en) | 2020-04-17 | 2020-04-17 | Surface strain gauge pasting and mounting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396421A (en) * | 2020-04-17 | 2020-07-10 | 上海轨道交通检测技术有限公司 | Surface strain gauge pasting and mounting device |
-
2020
- 2020-04-17 CN CN202020585514.9U patent/CN212479831U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396421A (en) * | 2020-04-17 | 2020-07-10 | 上海轨道交通检测技术有限公司 | Surface strain gauge pasting and mounting device |
| CN111396421B (en) * | 2020-04-17 | 2024-09-13 | 上海轨道交通检测认证(集团)有限公司 | Surface strain gauge pasting and mounting device |
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