CN210293193U - Portable strainometer clamping device - Google Patents
Portable strainometer clamping device Download PDFInfo
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- CN210293193U CN210293193U CN201822161300.4U CN201822161300U CN210293193U CN 210293193 U CN210293193 U CN 210293193U CN 201822161300 U CN201822161300 U CN 201822161300U CN 210293193 U CN210293193 U CN 210293193U
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- vertical plate
- strain gauge
- tool chuck
- clamping device
- bolt
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Abstract
The utility model relates to a portable strainometer clamping device belongs to the test measurement field, construct including operating device, support, measuring mechanism and clamping. The operating mechanism comprises a handle and a lead screw and is positioned at one end of the bracket; the fixed vertical plate and the movable vertical plate of the bracket are connected through a cross beam; the measuring mechanism comprises a displacement sensor, a sensor clamping block for mounting the displacement sensor, a bolt for fixing the displacement sensor and is positioned on the third beam of the bracket; the clamping mechanism comprises a first tool chuck and a rotating nut which are fixed in a semicircular groove of the right movable vertical plate, and a second tool chuck and a bolt which are fixed in a semicircular groove of the right fixed vertical plate, and is used for installing the strain gauge to be tested. The utility model discloses can satisfy the calibration demand of different diameter encapsulation strainometers.
Description
Technical Field
The utility model relates to a strainometer calibrating device belongs to the measurement test field.
Background
The strain gauge is widely applied to the industries and fields of civil engineering, aerospace and the like, and is an important component for monitoring the structural health. The accuracy and reliability of strain gauges are important guarantees for their effective monitoring, and therefore, calibration of the gauge characteristics of strain gauges becomes very important.
The strain gauge calibration device is used for calibrating the metering characteristics of strain gauges such as a vibrating wire type strain gauge and a fiber grating strain gauge and calibrating a displacement sensor working in a stressed state. There are several patents relating to strain gauge calibration, such as:
the vibrating wire strain gauge calibrator patent (application number: 201620713233.0, publication number: 205843589U) discloses a mechanical calibration device, which utilizes the principle of differential thread structure and a dial indicator to perform measurement. The end fixing device is adopted to install the strain gauge, relative sliding can be generated in the stretching or compressing direction in the process of calibrating the strain gauge, and the dial indicator is used as a measuring instrument for displacement change, so that the measuring precision is low.
The 'one-wire strain sensor calibration device' patent (application No. 200910213983.6, publication No. 101738157a) discloses a mechanical calibration device, which uses the differential screw transmission principle and dial indicator and extensometer to measure. The tested vibrating string type strain sensor is adhered to the calibrating device, so that the strain gauge is not convenient to mount and dismount during calibration, and the dial indicator and the extensometer are used as measuring instruments for displacement change, so that the measuring precision is low.
SUMMERY OF THE UTILITY MODEL
To above-mentioned measuring method not enough, the utility model discloses a strainometer calibrating device to a measuring strain gauge deformation's measuring method is proposed, the strainometer calibration demand of different diameter encapsulation can be satisfied, the strainometer that reduces produces gliding possibility in the calibration process, the installation and the dismantlement of the strainometer of also being convenient for simultaneously adopt the displacement sensor of higher accuracy as the measuring instrument of displacement volume, improved the calibration accuracy of strainometer.
The utility model adopts the following technical scheme:
the utility model provides a portable strainometer clamping device which characterized in that: the device comprises an operating mechanism, a bracket, a measuring mechanism and a clamping mechanism; the operating mechanism comprises a handle and a lead screw, and is positioned at one end of the bracket;
the support comprises a left fixed vertical plate, a first cross beam, a second cross beam, a left movable vertical plate, a third cross beam, a right movable vertical plate, a right fixed vertical plate and a cross beam, wherein the left fixed vertical plate and the right fixed vertical plate are fixed through the first cross beam, the second cross beam and the third cross beam;
the measuring mechanism comprises a displacement sensor, a bolt and a sensor clamping block, wherein the displacement sensor, the sensor clamping block for mounting the displacement sensor and the bolt for fixing the displacement sensor are positioned on the third beam;
the clamping mechanism comprises a first tool chuck, a rotating nut, a second tool chuck and a bolt, the first tool chuck and the rotating nut are installed and fixed in the semicircular groove of the right movable vertical plate, the second tool chuck and the bolt are fixed in the semicircular groove of the right fixed vertical plate, and the first tool chuck, the rotating nut, the second tool chuck and the bolt are used for installing a strain gauge to be tested.
In the portable strain gauge clamping device, the end face of the rotating nut is provided with the U-shaped groove.
In the portable strain gauge clamping device, one end of the cylindrical side surface of the rotating nut is provided with deep holes convenient to screw and disassemble, for example, three deep holes with the interval of 90 degrees, the depth of 5-6 mm and the diameter of 6 mm.
In the portable strain gauge clamping device, the other end of the cylindrical side surface of the rotating nut is provided with an external thread, such as a thread of M16 multiplied by 1.25.
In the portable strain gauge clamping device, one end of the first tool chuck is provided with the axial internal threaded hole, and the side surface of the end surface is provided with the straight groove.
According to the portable strainometer clamping device, the middle part of the first tool chuck is provided with the U-shaped groove, so that the portable strainometer clamping device can be used for placing strainometer end seats with different diameters.
In the portable strainometer clamping device, one end face of the second tool chuck is provided with the U-shaped groove.
In the portable strainometer clamping device, the other end face of the second tool chuck is provided with the axial threaded through hole, and the strainometer is fixed in the second tool chuck through the bolt.
The portable strainometer clamping device is characterized in that: the displacement sensor is one of a plurality of displacement sensors, such as a capacitance sensor, an inductance micrometer, a laser displacement sensor, a dial indicator and a grating micrometer.
The utility model designs a strainometer calibrating device, which can meet the strainometer calibration of the lead wire at the middle position of the strainometer and meet the strainometer clamping requirements of different end seat diameters; the tool chuck with the U-shaped structure is deformed by screwing the nut, so that the friction force between the tool chuck and the bracket is increased, the possibility of sliding of the strain gauge is reduced, and the strain gauge is also pressed tightly by the screwed rotating nut; a U-shaped groove is formed in one side of an internal thread hole of a tool chuck in the clamping mechanism, so that the strain gauge can be conveniently mounted and dismounted; the other end of the tool chuck in the clamping mechanism fixes the strain gauge by using a bolt, so that the strain gauge is convenient to mount and dismount; and a displacement sensor with higher precision is used as a displacement measuring instrument, so that the calibration precision of the strain gauge is improved.
Drawings
Fig. 1 is a schematic structural diagram of a portable strain gauge clamping device.
Fig. 2 is a schematic structural diagram of the clamping mechanism.
Fig. 3 is a schematic view of a swivel nut structure.
Fig. 4 is a schematic view of a first tooling collet configuration.
Fig. 5 is a schematic view of a second tooling collet.
Number designation in the figures: 1. an operating mechanism; 11. a handle; 12. a lead screw; 2. a support; 21. a vertical plate is fixed on the left side; 22. a first beam; 23. a second beam; 24. the vertical plate is moved on the left side; 25. a third beam; 26. the vertical plate is moved on the right side; 27. a vertical plate is fixed on the right side; 3. a measuring mechanism; 31. a displacement sensor; 32. A bolt; 33. a sensor clamp block; 4. a bolt; 5. a fixed block; 6. a strain gauge; 7. a clamping mechanism; 71. A first tooling chuck; 72. rotating the nut; 73. a second tool chuck; 74. a bolt; 8. a bolt; 9. a cross beam; 91. a cross beam; 92. a cross member.
Detailed Description
In order to make the technical personnel in this field more clear and intuitive to understand the present invention, the present invention will be further described with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "left side", "right side", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
A portable strain gauge clamping device comprises an operating mechanism 1, a support 2, a measuring mechanism 3 and a clamping mechanism 7. The operating mechanism 1 comprises a handle 11 and a lead screw 12 and is positioned at the left end of the bracket;
the bracket 2 comprises a left fixed vertical plate 21, a first cross beam 22, a second cross beam 23, a left movable vertical plate 24, a third cross beam 25, a right movable vertical plate 26 and a right fixed vertical plate 27; the left fixed vertical plate 21 and the right fixed vertical plate 27 are fixed through a first beam 22, a second beam 23 and a third beam 25; the left movable vertical plate 24 and the right movable vertical plate 26 can move in the directions of the first cross beam 22 and the second cross beam 23 under the action of a large force, the left movable vertical plate 24 and the right movable vertical plate 26 are fixed through the cross beam 9, and therefore the left movable vertical plate 24 and the right movable vertical plate 26 are parallel and the distance between the left movable vertical plate and the right movable vertical plate is kept unchanged, wherein the cross beam 9 comprises a cross beam 91 and a cross beam 92; the left moving vertical plate 24 is meshed with the outer thread of the screw rod 12 through the inner thread of the left moving vertical plate, so that the left moving vertical plate and the right moving vertical plate can move left and right when the hand wheel 11 rotates, and the left moving vertical plate 24 and the right moving vertical plate 26 can be self-locked when the hand wheel 11 stops rotating; the right movable vertical plate 26 and the right fixed vertical plate 27 are provided with paired semi-circular groove structures for installing the clamping mechanism 7;
the measuring mechanism 3 comprises a displacement sensor 31, a bolt 32 and a sensor clamping block 33; the displacement sensor 31 is arranged in a through hole of the sensor clamping block 33, and the displacement sensor 31 is fixed on the sensor clamping block 33 through a bolt 32; the sensor clamping block 33 is arranged on the third beam 25 of the bracket 2;
the clamping mechanism 7 comprises a first tool chuck 71 and a rotating nut 72 which are fixed in a semicircular groove of the right movable vertical plate 26, and a second tool chuck 73 and a bolt 74 which are fixed in a semicircular groove of the right fixed vertical plate 27, and is used for installing the strain gauge 6 to be measured.
When the strain gauge 6 is installed, the rotary nut 72 is rotated to enable a side straight groove of the rotary nut to be aligned with a side U-shaped groove of the first tool chuck 71 matched with the side straight groove, one end seat of the strain gauge 6 is placed in the middle U-shaped groove, the strain gauge 6 and the first tool chuck 71 are coaxial, the rotary nut 72 is screwed by hand, and the end seat of the strain gauge 6 is fastened in the first tool chuck 71 under the action of pretightening force; the other end seat of the strain gauge 6 is placed in a middle U-shaped groove of a second tool chuck 73, and the end seat of the strain gauge 6 is fastened by a bolt 74 under the action of pretightening force;
the handle 11 is rotated to adjust the right movable vertical plate 26 to a proper position, the first tool chuck 71 is placed in the semicircular groove of the right movable vertical plate 26, and the second tool chuck 73 is placed in the semicircular groove of the right fixed vertical plate 27; placing the fixed block 5 on the right movable vertical plate 26, and fixing the fixed block 5 by using the bolt 4 and the bolt 8, so as to fix the second tool chuck 27; performing corresponding operations on the second tool chuck 73; the strain gauge 6 is fixed by screwing the swivel nut 71 with a tool using a deep hole in the cylindrical side surface of the swivel nut 71, and fastening the bolt 74 at the right end of the second tool chuck 73 with the tool.
When calibrating the strain gauge 6, the displacement sensor 31 is mounted in the through hole of the sensor block 33, the position of the displacement sensor 31 is adjusted so that the axis of the displacement sensor 31 and the axis of the first tool chuck 71 are collinear, the moving range of the right moving vertical plate 26 is within the measuring range of the displacement sensor 31, and the bolt 32 is tightened to fix the displacement sensor 31 to the sensor block 33.
The handle 11 is turned to slightly move the left and right movable vertical plates 24 and 26, and the strain gauge 6 is pulled or pressed to be elongated or shortened, and the displacement amount is measured by the displacement sensor 31 of the right movable vertical plate 26. And reading the output signal of the strain gauge by using a corresponding strain gauge signal acquisition instrument, and further realizing the calibration of the strain gauge.
The above description is only a preferred example of the present invention and is not intended to limit the present invention.
Claims (9)
1. The utility model provides a portable strainometer clamping device which characterized in that: the device comprises an operating mechanism, a bracket, a measuring mechanism and a clamping mechanism;
the operating mechanism comprises a handle and a lead screw, and is positioned at one end of the bracket;
the support comprises a left fixed vertical plate, a first cross beam, a second cross beam, a left movable vertical plate, a third cross beam, a right movable vertical plate, a right fixed vertical plate and a cross beam, wherein the left fixed vertical plate and the right fixed vertical plate are fixed through the first cross beam, the second cross beam and the third cross beam;
the measuring mechanism comprises a displacement sensor, a bolt and a sensor clamping block, wherein the displacement sensor, the sensor clamping block for mounting the displacement sensor and the bolt for fixing the displacement sensor are positioned on the third beam;
the clamping mechanism comprises a first tool chuck, a rotating nut, a second tool chuck and a bolt, the first tool chuck and the rotating nut are installed and fixed in the semicircular groove of the right movable vertical plate, the second tool chuck and the bolt are fixed in the semicircular groove of the right fixed vertical plate, and the first tool chuck, the rotating nut, the second tool chuck and the bolt are used for installing a strain gauge to be tested.
2. The portable strain gauge clamping device as claimed in claim 1, wherein: and the end surface of the rotating nut is provided with a U-shaped groove.
3. The portable strain gauge clamping device as claimed in claim 1, wherein: one end of the cylindrical side face of the rotating nut is provided with a deep hole convenient to screw and disassemble, for example, three deep holes with the interval of 90 degrees, the depth of 5-6 mm and the diameter of 6mm are formed.
4. The portable strain gauge clamping device as claimed in claim 1, wherein: the other end of the cylindrical side of the swivel nut has external threads, such as M16 x 1.25 threads.
5. The portable strain gauge clamping device as claimed in claim 1, wherein: one end of the first tool chuck is provided with an axial internal threaded hole, and a straight groove is formed in the side face of the end face.
6. The portable strain gauge clamping device as claimed in claim 1, wherein: a U-shaped groove is formed in the middle of the first tool chuck and can be used for placing strain gauge end seats with different diameters.
7. The portable strain gauge clamping device as claimed in claim 1, wherein: and a U-shaped groove is formed in one end face of the second tool chuck.
8. The portable strain gauge clamping device as claimed in claim 1, wherein: and the other end surface of the second tool chuck is provided with an axial threaded through hole, and the strain gauge is fixed in the second tool chuck through a bolt.
9. The portable strain gauge clamping device as claimed in claim 1, wherein: the displacement sensor is one of a plurality of displacement sensors, such as a capacitance sensor, an inductance micrometer, a laser displacement sensor, a dial indicator and a grating micrometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822161300.4U CN210293193U (en) | 2018-12-22 | 2018-12-22 | Portable strainometer clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822161300.4U CN210293193U (en) | 2018-12-22 | 2018-12-22 | Portable strainometer clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210293193U true CN210293193U (en) | 2020-04-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822161300.4U Active CN210293193U (en) | 2018-12-22 | 2018-12-22 | Portable strainometer clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210293193U (en) |
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2018
- 2018-12-22 CN CN201822161300.4U patent/CN210293193U/en active Active
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