CN103033297A - Analysis meter for residual stress distribution along depth - Google Patents
Analysis meter for residual stress distribution along depth Download PDFInfo
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- CN103033297A CN103033297A CN2012105295965A CN201210529596A CN103033297A CN 103033297 A CN103033297 A CN 103033297A CN 2012105295965 A CN2012105295965 A CN 2012105295965A CN 201210529596 A CN201210529596 A CN 201210529596A CN 103033297 A CN103033297 A CN 103033297A
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Abstract
The invention belongs to the nondestructive testing technical field, and particularly relates to an optical nondestructive testing instrument, namely an analysis meter for residual stress distribution along depth. After emitted by a laser device (1) and passes through a spatial filter (2), a laser is emitted to a large-area holophote (3.1). The large-area holophote (3.1) reflexes the laser to an aspherical mirror, and the light field is changed to be a uniform collimating light field. After being refracted by a three-direction moire composite slab (3.3) and a phase shifter total reflection component (5), the light field irradiates to the surface of a test piece. A control processing system (8) controls a phase shifter on the outer ring of the instrument total reflection component (5), and optical distance is interfered. An image acquisition device (7) acquires a streak image which is formed by the interference of the light field on the test piece through a holophote A, and transmits the image to the control processing system (8). The control processing system (8) controls drilling equipment (6) to drill the test piece. By using the analysis meter for the residual stress distribution along the depth, a user can directly acquire the residual stress distribution data of the teat piece along the depth.
Description
Technical field
The invention belongs to technical field of nondestructive testing, be specifically related to a kind of optical non-destructive detection instrument.
Background technology
Unrelieved stress and always be difficult point and the focus of experimental solid mechanics research along the test that depth direction distributes.The existence of unrelieved stress is so that the example of structural instability even destruction is of common occurrence, and field of non destructive testing also detects unrelieved stress and classifies very important field of research as.For example, for the harbour Instantaneous changeable load, but in large capacity electrical network stable operation; But under emergency condition, when employing was powered than the low capacity stand-by station, common practices was the requirement of satisfying the special power load of this class of harbour by increasing station capacity; But the frequent sudden unloading process of unit, the frequent fluctuation of generating unit speed, the shaft system of unit torsional impact is violent, will significantly reduce fatigue life of shafting, causes serious problems.Carry out harbour Instantaneous changeable load standby diesel-generator unit technical research, adopt the reply of accumulation of energy unit to impact Instantaneous changeable load, shaft system of unit has been connected in series energy-storing flywheel, it is little that axle system impacts more common unit, test unrelieved stress and distribute along depth direction by " unrelieved stress is along the depth distribution analysis instrument ", thereby the unrelieved stress of material is serviceable life and safety to guarantee axle under the long-term impact of research axle system and the fatigue state.
Patent is to have announced a kind of inner three-directional moire interferometer in the invention of ZL200510027941.5, this instrument application high density diffraction grating and laser interferometry carry out the measurement of displacement and distortion, because the origin cause of formation of unrelieved stress is very complicated, cause its size and distribution also very complicated, especially along depth direction.The borehole test unrelieved stress is modal method, and U.S. ASTM has worked out resistance strain gage specially in conjunction with the borehole survey unrelieved stress and along the standard of depth profile.Because there is the defective that is difficult to overcome in resistance strain gage in the release strain of measuring boring procedure, limited the measuring accuracy of the method.
At present, the device that above-mentioned " resistance strain gage is in conjunction with the borehole survey unrelieved stress and along depth profile " also do not arranged both at home and abroad, just using the electric measuring method of pasting foil gauge (being again resistance strain gage) comes indirectly and point-to-point measurement, there are data in the place that is attached to foil gauge, what be not attached to does not have data, so this is a kind of point-to-point measurement technology, and is subject to the restrictions such as environment, temperature, both unstable, also very inaccurate.
Summary of the invention
The objective of the invention is: a kind of optical non-destructive detection instrument is provided, and this instrument can directly obtain test specimen along the residual stress distribution data on the degree of depth.
Technical scheme of the present invention is: a kind of unrelieved stress is along the depth distribution analysis instrument, and it comprises: laser instrument, spatial filter, three direction cloud testing instrument bodies, test specimen platform, phase-shifter total reflection parts, drilling equipment, image collecting device and control disposal system;
Laser instrument is fixed on the bracing frame;
Spatial filter comprises: high power objective, pin hole, object lens adjustment seat, the support of object lens adjustment seat, sliding plate, fixed flat planar, the support of pin hole adjustment seat, pin hole adjustment seat, double-screw bolt A, leveling board, fixed head and double-screw bolt B; One end periphery of high power objective is threaded, and high power objective is screwed in the object lens adjustment seat, and the object lens adjustment seat supports by the object lens adjustment seat and is fixedly connected with fixed flat planar; Pin hole is fixed on the pin hole adjustment seat, the pin hole adjustment seat is comprised of the disk of two sockets, pin hole is fixed in the inboard disk, fix by a spring and two adjusting bolts between inboard disk and outboard disc, spring and two adjusting bolts are carried out supported at three point to inboard disk, the hole adjustment seat supports by the pin hole adjustment seat and is fixedly connected with sliding plate, sliding plate is placed on the fixed flat planar, pin hole adjustment seat support base is equipped with double-screw bolt A, the end of double-screw bolt A screws in the fixed flat planar, and fixed flat planar is positioned at the upper surface of leveling board; Fixed head is connected by double-screw bolt B with leveling board, is placed with pellet and spring between fixed head and leveling board, and spatial filter is installed on the bracing frame by fixed head;
Three direction cloud testing instrument bodies comprise: large tracts of land completely reflecting mirror, aspheric mirror and adjustment seat thereof, three direction moire compoboard and supports; Aspheric mirror and adjustment seat thereof comprise: two centers are with the flat board of equal diameter through hole, aspheric mirror, spring and steel ball, and aspheric mirror embeds in the one flat plate, and two flat boards are bolted, and place spring and steel ball between two flat boards; Three direction moire compoboards comprise two blocks of plectanes setting up and down, and top plectane a is take its center of circle as initial point, on its x axle, y axle and 45 ° of axles, symmetrical be provided with 6 square holes, below plectane b take its center of circle as initial point, on its y axle, symmetrical be provided with 2 square holes; Large tracts of land completely reflecting mirror, aspheric mirror and adjustment seat thereof, three direction moire compoboards are rack-mount successively, and wherein the large tracts of land completely reflecting mirror is horizontal by 45 ° of angles;
Take the center of circle of phase-shifter total reflection parts as initial point, have 6 inclined holes along its x axle, y axle and 45 ° of direction of principal axis, the inclined-plane of inclined hole and horizontal sextant angle are α, 2 completely reflecting mirrors are installed on inclined-plane at each inclined hole, wherein, the square hole of plectane a is corresponding up and down in completely reflecting mirror on the inboard inclined-plane and the three direction moire compoboards, outside wherein one the back side installation phase-shifter of every group of completely reflecting mirror on the x axle of skew back face, y axle and the 45 ° of axles;
Test specimen is installed in the test specimen platform, the accumulation of corresponding phase-shifter total reflection parts outer ring, its center catoptron, test specimen platform directly over test specimen is provided with the completely reflecting mirror A with 45 ° of horizontal sextant angles, image collecting device is used for gathering the image of completely reflecting mirror A reflection, and the image that collects is sent to the control disposal system, the control disposal system is controlled the phase-shifter in drilling equipment and the phase-shifter total reflection parts simultaneously, and three direction cloud testing instrument bodies and phase-shifter total reflection parts are installed in the top of the test specimen platform of test specimen top.
The invention has the beneficial effects as follows: 1) the present invention adopts the effective filtering light field of spatial filter edge impurity, and has improved and expand area, also so that light field is more all even pure, thereby has improved the contrast of striped;
2) the present invention adopts non-sphere collimation mirror to form high-quality collimated light, so that instrument is compacter;
3) special construction of spatial filter of the present invention design, adjusting high power objective that can multi-angle and the relative position between the pin hole are to keep benchmark.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is spatial filter structural representation of the present invention;
Fig. 3 is pin hole adjustment seat structural representation among the present invention among the present invention;
Fig. 4 is aspheric mirror and adjustment seat structural representation thereof among the present invention;
Fig. 5 is three direction moire combined board structure synoptic diagram among the present invention;
Fig. 6 is the front view of phase-shifter total reflection parts among the present invention;
Fig. 7 is experimental result picture of the present invention;
Wherein, 1-laser instrument, the 2-spatial filter, 3-three direction cloud testing instrument bodies, 4-test specimen platform, 5-phase-shifter total reflection parts, the 6-drilling equipment, the 7-image acquisition, 8-controls disposal system, 2.1-high power objective, 2.2-pin hole, 2.3-object lens adjustment seat, 2.4-the object lens adjustment seat supports, 2.5-sliding plate, 2.6-fixed flat planar, 2.7-the pin hole adjustment seat supports, 2.8-pin hole adjustment seat, 2.9-double-screw bolt A, 2.10-leveling board, 2.11-fixed head, 2.12-double-screw bolt B, 3.1-large tracts of land completely reflecting mirror, 3.2-aspheric mirror and adjustment seat thereof, 3.3-three direction moire compoboards.
Embodiment
Referring to accompanying drawing 1, a kind of unrelieved stress is along the depth distribution analysis instrument, and it comprises: laser instrument 1, spatial filter 2, three direction cloud testing instrument bodies 3, test specimen platform 4, phase-shifter total reflection parts 5, drilling equipment 6 and image collecting device 7 and control disposal system 8;
Laser instrument 1 is fixed on the bracing frame;
Referring to accompanying drawing 2,3, spatial filter 2 comprises: high power objective 2.1, pin hole 2.2, object lens adjustment seat 2.3, object lens adjustment seat support 2.4, sliding plate 2.5, fixed flat planar 2.6, pin hole adjustment seat support 2.7, pin hole adjustment seat 2.8, double-screw bolt A2.9, leveling board 2.10, fixed head 2.11 and double-screw bolt B2.12; One end periphery of high power objective 2.1 is threaded, high power objective 2.1 is screwed in the object lens adjustment seat 2.3, according to the degree of depth that screws in, can regulate high power objective 2.1 apart from the distance of pin hole 2, object lens adjustment seat 2.3 supports 2.4 by the object lens adjustment seat and is fixedly connected with fixed flat planar 2.6; Pin hole 2.2 is fixed on the pin hole adjustment seat 2.8, pin hole adjustment seat 2.8 is comprised of the disk of two sockets, pin hole 2.2 is fixed in the inboard disk, fix by a spring and two adjusting bolts between inboard disk and outboard disc, spring and two adjusting bolts are carried out supported at three point to inboard disk, just can regulate pin hole about in the of 2.2 by regulating two bolts, about the position, hole adjustment seat 2.8 supports 2.7 by the pin hole adjustment seat and is fixedly connected with sliding plate 2.5, sliding plate 2.5 is placed on the fixed flat planar 2.6, be installed on the double-screw bolt A2.9 that the pin hole adjustment seat supports 2.7 bottoms by adjusting, can regulate high power objective 2.1 apart from the distance of pin hole 2.2; Fixed flat planar 2.6 is positioned at the upper surface of leveling board 2.10, fixed head 2.11 is connected by double-screw bolt B2.12 with leveling board 2.10, between fixed head 2.11 and leveling board 2.10, be placed with pellet and spring, by rotation double-screw bolt B2.12, can make leveling board 2.10 with respect to fixed head 2.11 along pellet moving up and down, produce, spatial filter 2 is installed on the bracing frame by fixed head 2.11 belows;
Comprise referring to accompanying drawing 3,4,5, three direction cloud testing instrument bodies 3: large tracts of land completely reflecting mirror 3.1, aspheric mirror and adjustment seat 3.2 thereof, three direction moire compoboard 3.3 and supports; Aspheric mirror and adjustment seat 3.2 thereof comprise: two centers are with the flat board of equal diameter through hole, aspheric mirror, spring and steel ball, aspheric mirror embeds among the one flat plate A, dull and stereotyped A and dull and stereotyped B are bolted, between dull and stereotyped A and dull and stereotyped B, place spring and steel ball, dull and stereotyped B is fixed on the support, and swivel bolt can be regulated non-sphere collimation mirror with respect to the angle of dull and stereotyped B, thereby reaches the purpose of adjusting beam path alignment; Three direction moire compoboards 3.3 comprise two blocks of plectanes setting up and down, and top plectane a is take its center of circle as initial point, on its x axle, y axle and 45 ° of axles, symmetrical be provided with 6 square holes, below plectane b take its center of circle as initial point, on its y axle, symmetrical be provided with 2 square holes; Plectane a and plectane b be arranged concentric up and down, and plectane a is fixed on the support, shines the collimated ray that gets off from aspheric mirror by 6 square holes on it, forms 6 regional light fields; Plectane b can be around central rotation, when its square hole forwards the x direction of principal axis to, the y axle of plectane a and the light field of 45 ° of directions are blocked, only allow axial 2 the square hole light fields of x pass through, at this moment, the measurement of the corresponding x of light field field, in like manner, when the b plate rotates to the y axle, corresponding y field measurement then, b rotates to 45 ° of direction of principal axis, can measure the light field of 45 ° of directions; Large tracts of land completely reflecting mirror 3.1, aspheric mirror and adjustment seat 3.2 thereof, three direction moire compoboards 3.3 are rack-mount successively, and wherein large tracts of land completely reflecting mirror 3.1 is horizontal by 45 ° of angles;
Referring to accompanying drawing 6, take the center of circle of phase-shifter total reflection parts 5 as initial point, have 6 inclined holes along its x axle, y axle and 45 ° of direction of principal axis, the inclined-plane of inclined hole and horizontal sextant angle are α, 2 completely reflecting mirrors are installed on inclined-plane at each inclined hole, wherein, the square hole of plectane a is corresponding up and down in the completely reflecting mirror on the inboard inclined-plane and the three direction moire compoboards 3.3, outside wherein one the back side installation phase-shifter of every group of completely reflecting mirror on the x axle of skew back face, y axle and the 45 ° of axles;
Test specimen is installed in the test specimen platform 4, the accumulation of the corresponding phase-shifter total reflection in its center parts 5 outer ring catoptrons, test specimen platform 4 directly over test specimen is provided with the completely reflecting mirror A with 45 ° of horizontal sextant angles, image collecting device 7 is used for gathering the image of completely reflecting mirror A reflection, and with the image that collects be sent to control disposal system 8, control disposal system 8 is controlled drilling equipment 6 and phase-shifter total reflection parts 5 simultaneously, and three direction cloud testing instrument bodies 3 are installed on the test specimen platform 4 of test specimen top with phase-shifter total reflection parts 5;
Unrelieved stress along the workflow of depth distribution analysis instrument is:
The laser that laser instrument 1 penetrates is behind spatial filter 2, project large tracts of land completely reflecting mirror 3.1, large tracts of land completely reflecting mirror 3.1 reflects the laser light to aspheric mirror, make light field become uniform collimated light field, light field is after the refraction of three direction moire compoboards 3.3 and phase instrument total reflection parts 5, expose to the test specimen surface, phase-shifter on control disposal system 8 phase instrument total reflection parts 5 outer rings, light path is intervened, image collecting device 7 collects the stripe pattern that forms because of the light field intervention on the test specimen by completely reflecting mirror A, and be sent to control disposal system 8,6 pairs of test specimen borings of control disposal system 8 keyhole devices, after the boring, drilling equipment 6 is shifted out light path, image collecting device 7 gathers the test specimen striated surface picture after the boring, and be sent to control disposal system 8, control disposal system 8 calculates unrelieved stress, the test specimen stripe pattern that accompanying drawing 7 collects for image collecting device 7 by the phase shift picture before and after the contrast boring.
Claims (4)
1. a unrelieved stress is along the depth distribution analysis instrument, it is characterized in that it comprises: laser instrument (1), spatial filter (2), three direction cloud testing instrument bodies (3), test specimen platform (4), phase-shifter total reflection parts (5), drilling equipment (6), image collecting device (7) and control disposal system (8);
Laser instrument (1) is fixed on the bracing frame;
Spatial filter (2) comprising: high power objective (2.1), pin hole (2.2), object lens adjustment seat (2.3), object lens adjustment seat support (2.4), sliding plate (2.5), fixed flat planar (2.6), the pin hole adjustment seat supports (2.7), pin hole adjustment seat (2.8), double-screw bolt A(2.9), leveling board (2.10), fixed head (2.11) and double-screw bolt B(2.12); One end periphery of high power objective (2.1) is threaded, and high power objective (2.1) is screwed in the object lens adjustment seat (2.3), and object lens adjustment seat (2.3) supports (2.4) by the object lens adjustment seat and is fixedly connected with fixed flat planar (2.6); Pin hole (2.2) is fixed on the pin hole adjustment seat (2.8), pin hole adjustment seat (2.8) is comprised of the disk of two sockets, pin hole (2.2) is fixed in the inboard disk, fix by a spring and two adjusting bolts between inboard disk and outboard disc, spring and two adjusting bolts are carried out supported at three point to inboard disk, hole adjustment seat (2.8) supports (2.7) by the pin hole adjustment seat and is fixedly connected with sliding plate (2.5), sliding plate (2.5) is placed on the fixed flat planar (2.6), the pin hole adjustment seat supports (2.7) bottom and is equipped with double-screw bolt A (2.9), the end of double-screw bolt A (2.9) screws in the fixed flat planar (2.6), and fixed flat planar (2.6) is positioned at the upper surface of leveling board (2.10); Fixed head (2.11) and leveling board (2.10) are by double-screw bolt B(2.12) be connected, between fixed head (2.11) and leveling board (2.10), be placed with pellet and spring, spatial filter (2) is installed on the bracing frame by fixed head (2.11);
Three direction cloud testing instrument bodies (3) comprising: large tracts of land completely reflecting mirror (3.1), aspheric mirror and adjustment seat (3.2) thereof, three direction moire compoboard (3.3) and supports; Aspheric mirror and adjustment seat thereof (3.2) comprising: two centers are with the flat board of equal diameter through hole, aspheric mirror, spring and steel ball, and aspheric mirror embeds in the one flat plate, and two flat boards are bolted, and place spring and steel ball between two flat boards; Three direction moire compoboards (3.3) comprise two blocks of plectanes setting up and down, and top plectane a is take its center of circle as initial point, on its x axle, y axle and 45 ° of axles, symmetrical be provided with 6 square holes, below plectane b take its center of circle as initial point, on its y axle, symmetrical be provided with 2 square holes; Large tracts of land completely reflecting mirror (3.1), aspheric mirror and adjustment seat (3.2) thereof, three direction moire compoboards (3.3) are rack-mount successively, and wherein large tracts of land completely reflecting mirror (3.1) is horizontal by 45 ° of angles;
Take the center of circle of phase-shifter total reflection parts (5) as initial point, have 6 inclined holes along its x axle, y axle and 45 ° of direction of principal axis, the inclined-plane of inclined hole and horizontal sextant angle are α, 2 completely reflecting mirrors are installed on inclined-plane at each inclined hole, wherein, the square hole of plectane a is corresponding up and down in completely reflecting mirror on the inboard inclined-plane and the three direction moire compoboards (3.3), outside wherein one the back side installation phase-shifter of every group of completely reflecting mirror on the x axle of skew back face, y axle and the 45 ° of axles;
Test specimen is installed in the test specimen platform (4), the accumulation of corresponding phase-shifter total reflection parts (5) outer ring, its center catoptron, test specimen platform (4) directly over test specimen is provided with the completely reflecting mirror A with 45 ° of horizontal sextant angles, image collecting device (7) is used for gathering the image of completely reflecting mirror A reflection, and with the image that collects be sent to control disposal system (8), control disposal system (8) is controlled the phase-shifter in drilling equipment (6) and the phase-shifter total reflection parts (5) simultaneously, and three direction cloud testing instrument bodies (3) and phase-shifter total reflection parts (5) are installed in the top of the test specimen platform (4) of test specimen top.
2. a kind of unrelieved stress as claimed in claim 1 is characterized in that along the depth distribution analysis instrument, and described laser instrument (1) is adjustable with the bracing frame height of spatial filter (2) below.
3. a kind of unrelieved stress as claimed in claim 1 or 2 is characterized in that along the depth distribution analysis instrument, and described high power objective (2.1) can be selected 8X, 10X, 20X, 40X or 60X, and 10 μ, 15 μ or 20 μ can be selected in the aperture of described pin hole (2.2).
4. a kind of unrelieved stress as claimed in claim 1 or 2 is characterized in that along the depth distribution analysis instrument, and laser instrument (1) adopts the solid pumping green laser.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210529596.5A CN103033297B (en) | 2012-12-10 | 2012-12-10 | Analysis meter for residual stress distribution along depth |
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| CN201210529596.5A CN103033297B (en) | 2012-12-10 | 2012-12-10 | Analysis meter for residual stress distribution along depth |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439031A (en) * | 2013-09-05 | 2013-12-11 | 东南大学 | Double-layer thin film residual stress testing structure |
| CN103528727A (en) * | 2013-10-14 | 2014-01-22 | 煤炭科学研究总院 | Coalmine one-hole multi-point fiber grating drilling stress testing device |
| CN107764450A (en) * | 2017-09-06 | 2018-03-06 | 北京航空航天大学 | A kind of synchronous across yardstick residual stress detection means is designed and developed |
| CN108181032A (en) * | 2017-12-21 | 2018-06-19 | 重庆市铜梁区华亿来铝材加工厂 | A kind of residual stress detection method |
| CN108775983A (en) * | 2018-07-03 | 2018-11-09 | 北京航空航天大学 | A kind of bone surface residual stress distribution test method |
| CN111474734A (en) * | 2020-04-13 | 2020-07-31 | 宁波大学 | Wide-range high-frequency-response optical confocal measuring head |
| CN116105633A (en) * | 2023-04-17 | 2023-05-12 | 中国科学院长春光学精密机械与物理研究所 | Free-form surface optical lens detection method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439031A (en) * | 2013-09-05 | 2013-12-11 | 东南大学 | Double-layer thin film residual stress testing structure |
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| CN103528727A (en) * | 2013-10-14 | 2014-01-22 | 煤炭科学研究总院 | Coalmine one-hole multi-point fiber grating drilling stress testing device |
| CN103528727B (en) * | 2013-10-14 | 2016-01-13 | 煤炭科学技术研究院有限公司 | Next hole multiple spot fiber grating drilling hole stress proving installation of coal mine |
| CN107764450A (en) * | 2017-09-06 | 2018-03-06 | 北京航空航天大学 | A kind of synchronous across yardstick residual stress detection means is designed and developed |
| CN108181032A (en) * | 2017-12-21 | 2018-06-19 | 重庆市铜梁区华亿来铝材加工厂 | A kind of residual stress detection method |
| CN108775983A (en) * | 2018-07-03 | 2018-11-09 | 北京航空航天大学 | A kind of bone surface residual stress distribution test method |
| CN108775983B (en) * | 2018-07-03 | 2019-05-03 | 北京航空航天大学 | A kind of bone surface residual stress distribution test method |
| CN111474734A (en) * | 2020-04-13 | 2020-07-31 | 宁波大学 | Wide-range high-frequency-response optical confocal measuring head |
| CN116105633A (en) * | 2023-04-17 | 2023-05-12 | 中国科学院长春光学精密机械与物理研究所 | Free-form surface optical lens detection method |
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| CN103033297B (en) | 2014-10-22 |
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