CN111288955B - Integrated strain calibration system - Google Patents
Integrated strain calibration system Download PDFInfo
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- CN111288955B CN111288955B CN202010154141.4A CN202010154141A CN111288955B CN 111288955 B CN111288955 B CN 111288955B CN 202010154141 A CN202010154141 A CN 202010154141A CN 111288955 B CN111288955 B CN 111288955B
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- seat
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- reflector
- polarization spectroscope
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
An integrated strainometer calibration system comprises a nut, a connecting block, an upper plate, an upper seat and a lower seat, the hypoplastron, the laser instrument, the upper plate can be dismantled with the upper berth and be connected, the pyramid prism can be dismantled and connected to the upper plate, the connection grip block can be dismantled to the lower extreme of upper berth, the connection lower berth can be dismantled on the top of hypoplastron, the hypoplastron can be dismantled and connect two sets of adjusting mirrors that correspond the setting from top to bottom, the speculum, the connection grip block can be dismantled to the lower berth, the plug-in connection strainometer between two grip blocks, be equipped with the polarization spectroscope on the output light path of laser instrument, be provided with the back reference mirror on the reverberation direction of polarization spectroscope, be provided with the preceding reference mirror for polarization spectroscope symmetry in the opposite direction of the reverberation of polarization spectroscope, be provided with 1/4 wave plate. The invention has the advantages of convenient clamping and disassembly, realization of tensile and compression experiments and high measurement precision.
Description
Technical Field
The invention relates to the technical field of test and measurement, in particular to an integrated strain gauge calibration system.
Background
The laser interference measurement technology is a technology for measuring based on the principle of light wave interference, and the laser has the characteristics of high brightness, good directivity, good monochromaticity and coherence and the like, so that the laser interference measurement system is widely applied. The laser interferometer based on the laser interference measurement technology has the advantages of high response speed, large measurement range and high measurement precision, and can be widely applied to online measurement, error correction and control of precision machine tools, large-scale integrated circuit processing equipment, strain measurement and the like.
The tensile testing machine is a mechanical stress testing machine for testing mechanical properties such as tension, compression, bending, shearing, peeling and the like of metal materials and non-metal materials. The clamp in the traditional tensile testing machine consists of two pincers, a sample to be tested is placed in two jaws to be clamped tightly, only a tensile test can be carried out, and a compression test cannot be carried out. And the tensile testing machine only usually carries out the experiment, does not carry out calibration work, simultaneously to special sample, for example the strainometer, need according to the corresponding anchor clamps of shape design of sample, whether anchor clamps design is reasonable, the height that is concerned with the test result accuracy. In addition, the sample is stretched in the middle of a cross beam of the tensile testing machine, the reading is on an upright column on one side, and the distance between the upright column and the sample is long, so that data output by the sample and data read on the upright column generate certain error due to deformation of the cross beam, and the measurement result is inaccurate.
Disclosure of Invention
The invention provides an integrated strain gauge calibration system, which can be used for carrying out a tensile test and a compression test on a strain gauge by using a special clamp so as to realize the integration of tension and compression. The laser interferometer dual-optical-path measurement system is adopted, Abbe errors do not exist, the to-be-measured object is traced to the laser wavelength, and the measurement precision is high.
In order to achieve the purpose, the invention provides the following scheme: an integrated strainometer calibration system comprises a nut, a connecting block, an upper plate, an upper seat, a lower plate and a laser, wherein the upper plate is detachably connected with the upper seat, the upper plate is detachably connected with a pyramid prism, the lower end of the upper seat is detachably connected with a clamping block, the top end of the lower plate is detachably connected with the lower seat, the lower plate is detachably connected with two groups of adjusting mirrors and reflecting mirrors which are correspondingly arranged up and down, the lower seat is detachably connected with the clamping block, a strainometer is inserted and connected between the two clamping blocks, a polarization spectroscope is arranged on an output light path of the laser, a rear reference mirror is arranged in the reflected light direction of the polarization spectroscope, front reference mirrors are symmetrically arranged in the opposite direction of the reflected light of the polarization spectroscope relative to the polarization spectroscope, a 1/4 wave plate is arranged in the transmitted light direction of the, the adjusting mirror and the pyramid prism are arranged up and down correspondingly, and the connecting block is detachably connected with the upper plate and the lower plate respectively.
Preferably, an internal threaded hole is machined in the end face machining center of the nut, and knurling and straight grooves are circumferentially arranged on the outer surface of the nut.
Preferably, the upper portion of connecting block is equipped with first through-hole, the middle part of connecting block is equipped with the external screw thread, the bottom processing of connecting block has the counter sink.
Preferably, the upper plate and the lower plate are both provided with a second through hole and a plurality of third through holes, and the upper plate is detachably connected with the upper seat and the pyramid prism through the third through holes respectively.
Preferably, threaded holes are formed in the upper seat and the lower seat, first grooves are formed in the side face of the upper seat and the side face of the lower seat, second grooves are formed in the upper seat and the lower seat, third grooves are formed in the side face of the clamping block, and two counter bores are formed in the end face of the clamping block.
The invention discloses the following technical effects: the invention provides an integrated strain gauge calibration system which can be used for performing a tensile test and a compression test and realizing the integration of tensile and compression. Meanwhile, the double optical paths of the laser interferometer are utilized for measurement, so that no Abbe error is introduced in the measurement process. The invention traces the source to be measured to the laser wavelength, and is a strain gauge calibration system capable of realizing high-precision measurement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of an integrated strain gauge calibration system;
FIG. 2 is a schematic view of an upper swivel nut;
FIG. 3 is a schematic view of the structure of the upper connecting block;
FIG. 4 is a schematic diagram of an upper plate structure;
FIG. 5 is a schematic view of the upper seat structure;
FIG. 6 is a schematic view of a clamp block configuration;
FIG. 7 is a schematic view of a lower seat structure;
FIG. 8 is a schematic view of the lower plate construction;
FIG. 9 is a schematic view of beam transmission;
FIG. 10 is a schematic view showing the position of light passing through the mirror;
number designation in the figures: 1. a nut; 101. screwing a nut; 102. a lower nut; 2. connecting blocks; 201. an upper connecting block; 202. a lower connecting block; 3. an upper plate; 4. an upper seat; 5, clamping blocks; 501. an upper clamping block; 502. a lower clamping block; 6. a lower seat; 7. a lower plate; 8. a mirror; 801. a right reflector; 802. a left reflector; 9. adjusting the mirror; 901. a right adjustment mirror; 902. a left adjustment mirror; 10. a reference mirror; 1001. a front reference mirror; 1002. a back reference mirror; 11. a polarizing beam splitter; 12. 1/4 a wave plate; 13. a strain gauge; 14. a pyramid prism; 1401. a left corner cube; 1402. a right cube-corner prism; 15. a laser, 16, a first via; 17. a second through hole; 18. a third through hole; 19. a first groove; 20. a second groove; 21. and a third groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides an integrated strain gauge calibration system which comprises a nut 1, a connecting block 2, an upper plate 3, an upper seat 4, a lower seat 6, a lower plate 7 and a laser 15, wherein the upper plate 3 is detachably connected with the upper seat 4, the upper plate 3 is detachably connected with a pyramid prism 14, the lower end of the upper seat 4 is detachably connected with a clamping block 5, the top end of the lower plate 7 is detachably connected with the lower seat 6, the lower plate 7 is detachably connected with two adjusting mirrors 9 and a reflecting mirror 8 which are correspondingly arranged up and down, the adjusting mirror 9 comprises a right adjusting mirror 901 and a left adjusting mirror 902, the reflecting mirror 8 comprises a right reflecting mirror 801 and a left reflecting mirror 802, the lower plate 7 is also detachably connected with a polarization spectroscope 11, the lower seat 6 is detachably connected with the clamping block 5, a strain gauge 13 is inserted and connected between the two clamping blocks 5, a polarization spectroscope 11 is arranged on an output light path of the laser 15, a rear reference mirror 1002 is arranged in the direction of the reflected light of the polarization beam splitter 11, a front reference mirror 1001 is symmetrically arranged in the opposite direction of the reflected light of the polarization beam splitter 11 with respect to the polarization beam splitter 11, an 1/4 wave plate 12 is arranged in the direction of the transmitted light of the polarization beam splitter 11, a left reflecting mirror 802 is arranged on the right of the 1/4 wave plate 12, a left adjusting mirror 902 is arranged on the left reflecting mirror 802, a left pyramid prism 1401 is arranged above the left adjusting mirror 902, a right reflecting mirror 801 is symmetrically arranged on the right of the left reflecting mirror 802 with respect to the lower base 6, a right adjusting mirror 901 is arranged on the right reflecting mirror 801, a right pyramid prism 1402 is arranged above the left adjusting mirror 902, and the connecting block 2 is detachably connected with the upper plate 3 and the lower plate 7 respectively.
According to the further optimization scheme, an internal threaded hole is machined in an end face machining center of the nut 1, and knurls and straight grooves are arranged on the outer surface of the nut 1 in the circumferential direction.
Further optimize the scheme, the upper portion of connecting block 2 is equipped with first through-hole 16, first through-hole 16 is the circular port for be connected to tensile testing machine, the middle part of connecting block 2 is equipped with the external screw thread, the bottom processing of connecting block 2 has 4 counter bores, connecting block 2 is connected with upper plate 3 through second through-hole 17, connecting block 2 includes connecting block 201, lower connecting block 202, nut 1 includes upper nut 101, lower nut 102, upper connecting block 201 with upper nut 101 threaded connection, lower connecting block 202 with lower nut 102 threaded connection.
In a further optimized scheme, a second through hole 17 and a plurality of third through holes 18 are formed in the upper plate 3 and the lower plate 7, so that the upper connecting block 201 can penetrate through the second through hole 17 to be in threaded connection with the upper seat 4, the lower connecting block 202 can penetrate through the second through hole 17 to be in threaded connection with the lower seat 6, 12 third through holes 18 which are bilaterally symmetrical are formed in two sides of the upper plate 3, and the upper plate 3 is in threaded connection with the pyramid prism 14 through the third through holes 18; the lower plate 7 is provided with 16 third through holes 18 for fixing the polarization beam splitter 11, the right reflector 801 and the left reflector 802.
According to the further optimized scheme, threaded holes are formed in the upper seat 4 and the lower seat 6, first grooves 19 are formed in the side faces of the upper seat 4 and the side faces of the lower seat 6, the first grooves 19 are rectangular grooves, second grooves 20 are formed in the upper seat 4 and the lower seat 6, the second grooves 20 are U-shaped grooves, third grooves 21 are formed in the side faces of the clamping blocks 5, the third grooves 21 are semicircular grooves, two countersunk holes are formed in the end faces of the clamping blocks 5 and the end faces of the upper seat 4 and the lower seat 6, the second grooves 20 are used for accommodating the strain gauges 13, the third grooves 21 are used for clamping the strain gauges 13, bolts clamp the strain gauges 13 through the countersunk holes, and circular through holes are formed in the side faces of the lower seat 6 and used for allowing laser to pass through.
When the strain gauge 13 is installed, the upper connecting block 201 is connected to a tensile testing machine, the upper nut 101 is locked, the lower connecting block 202 is connected to the tensile testing machine, the lower nut 102 is locked, the upper seat 4 is adjusted to a proper position, the two end seats of the strain gauge 13 are respectively placed in the U-shaped grooves of the upper seat 4 and the lower seat 6, and finally the strain gauge 13 is fixed tightly through bolts by the upper clamping block 501 and the lower clamping block 502.
When the calibration system works, a laser 15 emits a beam of orthogonal polarized light with vibration directions perpendicular to each other and wavelengths of lambda, the orthogonal polarized light is divided into two beams of polarized light (s light and p light) with perpendicular directions after passing through a polarization beam splitter 11, wherein the s polarized light is reflected by the polarization beam splitter 11 and enters a back reference mirror 1002, and the s polarized light is reflected by the back reference mirror 1002 and then enters the polarization beam splitter 11 again to serve as a reference light beam; the other beam of p-polarized light is transmitted by the polarization beam splitter 11, passes through the 1/4 wave plate 12, is changed into circularly polarized light, passes through a point A in the oval through hole of the left reflector 802, then enters the right reflector 801 through the circular through hole of the lower seat 6, is reflected by the right reflector 801, then enters the right pyramid prism 1402 above the right reflector 901, is reflected by the right pyramid prism 1402, then enters the right reflector 901 again, is adjusted in position by the right reflector 901, then is reflected by the right reflector 801, passes through a point B in the oval through hole of the left reflector 802, enters the 1/4 wave plate 12, is changed into s-polarized light, passes through the polarization beam splitter 11 after being reflected, then enters the front reference mirror 1001, is changed in passing position by reflection of the front reference mirror 1001, then returns to the polarization beam splitter 11 again, passes through the 1/4 wave plate 12 after being reflected by the polarization beam splitter 11, the light is changed into circularly polarized light again, enters a point C in the elliptical reflector of the left reflector 802, is reflected to enter a left pyramid prism 1401 above the left reflector 902 through the left adjusting mirror 902, enters the left adjusting mirror 902 again after being reflected by the left pyramid prism 1401, enters a point D in the elliptical reflector of the left reflector 802 after the position of the light is adjusted by the left adjusting mirror 902, enters an 1/4 wave plate 12 after passing through the elliptical reflector of the left reflector 802, is changed into p-polarized light again, is transmitted by the polarization beam splitter 11 and is used as measuring light to be superposed with s-polarized light reference light to form interference fringes and enters the laser 15 to receive signals.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (5)
1. An integrated strain gauge calibration system, comprising: comprises a nut (1), a connecting block (2), an upper plate (3), an upper seat (4), a lower seat (6), a lower plate (7) and a laser (15), wherein the upper plate (3) is detachably connected with the upper seat (4), the upper plate (3) is detachably connected with an angular cone prism (14), the lower end of the upper seat (4) is detachably connected with a clamping block (5), the top end of the lower plate (7) is detachably connected with the lower seat (6), the lower plate (7) is detachably connected with two adjusting mirrors (9) and a reflector (8) which are correspondingly arranged up and down, the adjusting mirrors (9) comprise a right adjusting mirror (901) and a left adjusting mirror (902), the reflector (8) comprises a right reflector (801) and a left reflector (802), the lower plate (7) can also be detachably connected with a polarization spectroscope (11), the lower seat (6) can be detachably connected with the clamping block (5), a strain gauge (13) is inserted and connected between the two clamping blocks (5), a polarization spectroscope (11) is arranged on an output light path of the laser (15), a rear reference mirror (1002) is arranged in the direction of reflected light of the polarization spectroscope (11), a front reference mirror (1001) is symmetrically arranged in the opposite direction of the reflected light of the polarization spectroscope (11) relative to the polarization spectroscope (11), an 1/4 wave plate (12) is arranged in the direction of transmitted light of the polarization spectroscope (11), the 1/4 wave plate (12) is detachably connected with the polarization spectroscope (11), a left reflector (802) is arranged on the right side of the 1/4 wave plate (12), a left adjusting mirror (902) is arranged on the upper surface of the left reflector (802), a left pyramid prism (1401) is arranged on the upper surface of the left adjusting mirror (902), and a right reflector (801) is symmetrically arranged on the right side of the left reflector (802) relative to the lower seat, the upper surface of the right reflector (801) is provided with a right adjusting mirror (901), the upper part of the left adjusting mirror (902) is provided with a right corner cube prism (1402), and the connecting block (2) is detachably connected with the upper plate (3) and the lower plate (7) respectively.
2. The integrated strain gage calibration system as set forth in claim 1 wherein: an internal threaded hole is machined in an end face machining center of the nut (1), and knurls and straight grooves are circumferentially arranged on the outer surface of the nut (1).
3. The integrated strain gage calibration system as set forth in claim 1 wherein: the upper portion of connecting block (2) is equipped with first through-hole (16), the middle part of connecting block (2) is equipped with the external screw thread, the bottom processing of connecting block (2) has the counter sink.
4. The integrated strain gage calibration system as set forth in claim 1 wherein: the upper plate (3) and the lower plate (7) are respectively provided with a second through hole (17) and a plurality of third through holes (18), and the upper plate (3) is detachably connected with the upper seat (4) and the pyramid prism (14) through the third through holes (18).
5. The integrated strain gage calibration system as set forth in claim 1 wherein: the clamping device is characterized in that threaded holes are formed in the upper seat (4) and the lower seat (6), first grooves (19) are formed in the side faces of the upper seat (4) and the side faces of the lower seat (6), second grooves (20) are formed in the side faces of the upper seat (4) and the lower seat (6), third grooves (21) are formed in the side faces of the clamping blocks (5), and two countersunk holes are formed in the end faces of the clamping blocks (5).
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| CN202010154141.4A CN111288955B (en) | 2020-03-07 | 2020-03-07 | Integrated strain calibration system |
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| CN202010154141.4A CN111288955B (en) | 2020-03-07 | 2020-03-07 | Integrated strain calibration system |
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| CN111288955B true CN111288955B (en) | 2021-06-29 |
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