CN211651508U - Calibration auxiliary device and calibration device of resistance type strain gauge - Google Patents
Calibration auxiliary device and calibration device of resistance type strain gauge Download PDFInfo
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- CN211651508U CN211651508U CN202020183942.9U CN202020183942U CN211651508U CN 211651508 U CN211651508 U CN 211651508U CN 202020183942 U CN202020183942 U CN 202020183942U CN 211651508 U CN211651508 U CN 211651508U
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Abstract
The utility model discloses a calibration auxiliary device and calibrating device of resistance-type foil gage, treat calibration resistance-type foil gage including compression testing machine and at least one, still include I-steel member, first vibrating wire formula strainometer and second vibrating wire formula strainometer symmetry set up the inboard at the both sides flange board of I-steel member, the tip of I-steel member and compression testing machine's pressure plate contact, it sets up on I-steel member and treats calibration resistance-type foil gage's measurement station position and first vibrating wire formula strainometer or second vibrating wire formula strainometer's measurement station position corresponding to treat calibration resistance-type foil gage. The calibration auxiliary device and the calibration device of the resistance-type strain gauge are simple in structure and easy and convenient to operate, rapid inspection and calibration of the resistance-type strain gauge can be achieved, measured values are accurate, and the calibration device is good in effect.
Description
Technical Field
The utility model relates to a calibration auxiliary device and calibrating device of resistance-type foil gage.
Background
In the engineering field, the use of the resistance strain gauge for strain measurement is a widely applied measurement method, and the quality of the resistance strain gauge is uneven, which often causes the problems of invalid measured values, test failure and the like in the use process. Therefore, the rapid verification of the strain gauge before use is a key measure for ensuring the strain measurement is correct and accurate. In actual operation, the calibration of the resistance-type strain gauge is often completed by special equipment of a manufacturer, the operation is complex, the rapid calibration of the resistance-type strain gauge by a user is not facilitated, and a rapid calibration device for the most commonly used resistance-type strain gauge does not exist in the current market.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a calibration auxiliary device and calibrating device of resistance-type foil gage can realize the quick inspection calibration of resistance-type foil gage, simple structure, easy and simple to handle.
For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:
the utility model provides a calibration auxiliary device of resistance-type strain gauge, includes compression testing machine and at least one treats calibration resistance-type strain gauge, still includes I-steel member, first vibrating wire formula strainometer and second vibrating wire formula strainometer symmetry set up the inboard at the both sides flange board of I-steel member, the tip of I-steel member and compression testing machine's pressure plate contact, treat that calibration resistance-type strain gauge sets up on I-steel member and treat that the measurement point position of calibration resistance-type strain gauge corresponds with the measurement point position of first vibrating wire formula strainometer or second vibrating wire formula strainometer.
Preferably, the centers of the first and second vibrating wire strain gauges in the height direction are equal in height to the center of the i-steel member in the height direction.
Preferably, the number of the resistance strain gauges to be calibrated is 2-5.
Preferably, the number of the resistance strain gauges to be calibrated is 3.
Preferentially, the resistance-type strain gauge to be calibrated is bonded on the I-shaped steel member through glue.
The calibration device for the resistance-type strain gauge comprises a reading instrument, a static strain acquisition instrument, a computer and a calibration auxiliary device, wherein the calibration auxiliary device is any one of the calibration auxiliary devices, the resistance-type strain gauge to be calibrated is connected with the computer through the static strain acquisition instrument, and the first vibrating wire type strain gauge and the second vibrating wire type strain gauge are both connected with the computer through the reading instrument.
The utility model has the advantages that:
the calibration auxiliary device and the calibration device of the resistance-type strain gauge are simple in structure and easy and convenient to operate, rapid inspection and calibration of the resistance-type strain gauge can be achieved, measured values are accurate, and the calibration device is good in effect.
Drawings
Fig. 1 is a schematic front view of a calibration assisting device for a resistive strain gauge according to the present invention;
FIG. 2 is a schematic cross-sectional view of an I-shaped steel member of the present invention;
fig. 3 is a comparison schematic diagram of the calibration of the resistance strain gauge of the present invention;
the reference numerals of the drawings have the following meanings:
1: a pressurizing plate; 2: an I-shaped steel member; 3: a first resistance strain gauge to be calibrated; 4: a first vibrating wire strain gauge; 5: a second vibrating wire strain gauge; 6: a compression tester; 7: a second resistance type strain gauge to be calibrated; 8: and the third resistance strain gauge to be calibrated.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not limited to the present invention.
As shown in fig. 1-2, a calibration auxiliary device for a resistance type strain gauge comprises a compression testing machine 6, at least one resistance type strain gauge to be calibrated, an i-shaped steel member 2, a first vibrating wire type strain gauge 4 and a second vibrating wire type strain gauge 5, wherein the first vibrating wire type strain gauge 4 and the second vibrating wire type strain gauge 5 are vibrating wire type strain gauges qualified in verification, the calibration auxiliary device at least comprises two vibrating wire type strain gauges qualified in verification, namely the first vibrating wire type strain gauge 4 and the second vibrating wire type strain gauge 5 are included, and the number of the first vibrating wire type strain gauge 4 and the second vibrating wire type strain gauge 5 can be increased to multiple values according to actual requirements. The I-shaped steel member 2 has a certain length, two end faces of the I-shaped steel member are flush, and an anti-rust paint coating is preferably laid on the outer surface of the I-shaped steel member 2, so that the service life of the I-shaped steel member 2 is prolonged, and the calibration precision of the I-shaped steel member is improved.
The first vibrating wire type strain gauge 4 and the second vibrating wire type strain gauge 5 are symmetrically arranged on the inner sides of flange plates on two sides of the i-shaped steel member 2, preferably, as shown in fig. 1 and 2, the centers of the first vibrating wire type strain gauge 4 and the second vibrating wire type strain gauge 5 in the height direction are equal to the center of the i-shaped steel member 2 in the height direction. That is, taking the direction of fig. 1 as an example, the first vibrating wire strain gauge 4 and the second vibrating wire strain gauge 5 are disposed at the middle height position of the i-shaped steel member 2, and the two vibrating wire strain gauges are disposed on the same side of the web and symmetrically disposed on the inner side of the flange plate.
The utility model discloses a calibration auxiliary device can once measure a plurality ofly treat calibration resistance type foil gage, and is general, and the quantity of treating calibration resistance type foil gage is 2-5, for example in figure 1 and figure 2, the quantity of treating calibration resistance type foil gage is 3, it bonds on I-steel member 2 through glue to treat calibration resistance type foil gage.
The 3 resistance-type strain gauges to be calibrated are respectively a first resistance-type strain gauge 3 to be calibrated, a second resistance-type strain gauge 7 to be calibrated and a third resistance-type strain gauge 8 to be calibrated, the centers of the heights of the 3 resistance-type strain gauges to be calibrated are equal in height with the centers of the heights of the vibrating wire strain gauges, the first resistance-type strain gauge 3 to be calibrated and the first vibrating wire strain gauge 4 are arranged on two sides of the flange plate on one side, the second resistance-type strain gauge 7 to be calibrated and the second vibrating wire strain gauge 5 are arranged on two sides of the flange plate on the other side, and the third resistance-type strain gauge 8 to be calibrated is arranged in the center of the web plate and is equidistant from the first resistance-type strain gauge 3 to be calibrated and the second resistance-type strain gauge 7 to be calibrated.
The end part of the I-steel member 2 is contacted with a pressurizing plate 1 of a compression testing machine 6, axial pressure can be applied to the I-steel member 2 through the compression testing machine 6, the resistance-type strain gauge to be calibrated is arranged on the I-steel member 2, the position of a measuring point of the resistance-type strain gauge to be calibrated corresponds to the position of a measuring point of a first vibrating wire strain gauge 4 or a second vibrating wire strain gauge 5, in the graph 1, the number of the resistance-type strain gauges to be calibrated is 3, the number of the vibrating wire strain gauges is 2, and the corresponding relation among the resistance-type strain gauges to be calibrated and the vibrating wire strain gauges is as shown in the graph 2:
the measuring point positions of the two resistance-type strain gauges to be calibrated, which are positioned on the left side and the right side, are positioned on the outer side of the flange plate, the measuring point positions of the two vibrating wire strain gauges are positioned on the inner side of the flange plate, and the measuring point positions of the two resistance-type strain gauges to be calibrated are respectively the same as the measuring point positions of the first vibrating wire strain gauge 4 and the second vibrating wire strain gauge 5.
The measuring point positions of the first vibrating wire type strain gauge 4 and the second vibrating wire type strain gauge 5 are symmetrical with respect to the measuring point position of the middle one of the resistance type strain gauges to be calibrated.
Correspondingly, the calibration device for the resistance-type strain gauge comprises a reading instrument, a static strain acquisition instrument, a computer and a calibration auxiliary device, wherein the calibration auxiliary device is any one of the calibration auxiliary devices, the resistance-type strain gauge to be calibrated is connected with the computer through the static strain acquisition instrument, and the first vibrating wire type strain gauge 4 and the second vibrating wire type strain gauge 5 are both connected with the computer through the reading instrument. The computer is used for reading and storing data, relevant numerical values can be calculated manually, and also can be calculated by the computer, the calculation is simple, the prior art does not relate to the improvement of an algorithm, specifically, the device has a simple structure, is simple and convenient to operate, can realize the quick test and calibration of the resistance type strain gauge, and the realization method can refer to the following steps:
1. and (3) processing the I-steel member 2 with proper length, keeping the end face flush, and laying antirust paint on the outer surface of the I-steel member 2.
2. And welding qualified vibrating wire strain gauges at the corresponding positions of the I-shaped steel member (the number of the vibrating wire strain gauges is not less than 2).
3. And adhering at least one resistance type strain gauge to be calibrated on a section corresponding to the welding position of the vibrating wire type strain gauge by using 502 glue, and connecting the resistance type strain gauge to be calibrated with a static strain acquisition instrument.
4. The I-shaped steel member 2 is placed in the middle of a compression testing machine pressurizing plate, so that the I-shaped steel member 2 bears axial pressure, the pressurizing plate of the compression testing machine is leveled to be just contacted with the two ends of the I-shaped steel member 2, and the pressure returns to zero.
5. And reading initial readings of the vibrating wire type strain gauge and the resistance type strain gauge to be calibrated.
6. And applying axial pressure load, wherein the loading is not less than three stages in grades, and the maximum loading value is smaller than the elastic proportion of the I-shaped steel member 2, so that the I-shaped steel member 2 is ensured to be in an elastic working state. And after each stage of pressure loading is stable, reading strain values of the vibrating wire type strain gauge and the resistance type strain gauge to be calibrated.
7. And after the loading is finished, unloading and reading the vibration wire type strain gauge and the reading of the unloaded resistance type strain gauge to be calibrated.
8. And calculating strain values corresponding to the loading pressure values of all levels, and comparing the reading of the resistance-type strain gauge to be calibrated with the theoretical strain value, so that whether the measurement value of the resistance-type strain gauge to be calibrated is accurate can be verified. As shown in fig. 3, the resistance-type strain gauge to be calibrated is calibrated according to the steps of the technical scheme, at each level of pressure value, the reading of the strain gauge, the theoretical calculation value are relatively close, and the pressure value-strain curve is in a linear relationship, which indicates that the i-shaped steel member is in an elastic working state, and as shown in fig. 3, the measurement value of the resistance-type strain gauge to be calibrated is accurate, and the calibration device has a good effect.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings are utilized, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a calibration auxiliary device of resistance-type strain gauge, includes compression testing machine (6) and at least one and treats calibration resistance-type strain gauge, its characterized in that still includes I-steel member (2), first vibrating wire formula strainometer (4) and second vibrating wire formula strainometer (5) symmetry set up the inboard at the both sides flange board of I-steel member (2), the tip of I-steel member (2) and compression testing machine (6) the pressure plate (1) contact, treat that calibration resistance-type strain gauge sets up on I-steel member (2) and treat that the measurement point position of calibration resistance-type strain gauge corresponds with the measurement point position of first vibrating wire formula strainometer (4) or second vibrating wire formula strainometer (5).
2. The calibration assistance device for the resistive strain gage according to claim 1, wherein the centers of the first vibrating wire strain gage (4) and the second vibrating wire strain gage (5) in the height direction are equal to the height of the center of the i-shaped steel member (2) in the height direction.
3. The auxiliary device for calibrating resistive strain gages according to claim 1, wherein the number of resistive strain gages to be calibrated is 2-5.
4. The auxiliary device for calibrating resistive strain gages according to claim 3, wherein the number of resistive strain gages to be calibrated is 3.
5. The calibration aid for a resistive strain gage according to claim 3, wherein the resistive strain gage to be calibrated is bonded to the I-shaped steel member (2) by glue.
6. A calibration device for a resistance-type strain gauge comprises a reading instrument, a static strain acquisition instrument and a computer, and is characterized by further comprising a calibration auxiliary device, wherein the calibration auxiliary device is the calibration auxiliary device of any one of claims 1 to 5, the resistance-type strain gauge to be calibrated is connected with the computer through the static strain acquisition instrument, and the first vibrating wire strain gauge (4) and the second vibrating wire strain gauge (5) are both connected with the computer through the reading instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020183942.9U CN211651508U (en) | 2020-02-19 | 2020-02-19 | Calibration auxiliary device and calibration device of resistance type strain gauge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020183942.9U CN211651508U (en) | 2020-02-19 | 2020-02-19 | Calibration auxiliary device and calibration device of resistance type strain gauge |
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| Publication Number | Publication Date |
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| CN211651508U true CN211651508U (en) | 2020-10-09 |
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| CN202020183942.9U Active CN211651508U (en) | 2020-02-19 | 2020-02-19 | Calibration auxiliary device and calibration device of resistance type strain gauge |
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