CN101620044A - Young's elastic modulus tester with optical lever without reflector - Google Patents
Young's elastic modulus tester with optical lever without reflector Download PDFInfo
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- CN101620044A CN101620044A CN200910060161A CN200910060161A CN101620044A CN 101620044 A CN101620044 A CN 101620044A CN 200910060161 A CN200910060161 A CN 200910060161A CN 200910060161 A CN200910060161 A CN 200910060161A CN 101620044 A CN101620044 A CN 101620044A
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- scale
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- elastic modulus
- steel wire
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Abstract
The invention relates to a Young's elastic modulus tester with an optical lever without a reflector. A steel wire is fixed in a mode of the existing instrument structure, and a plane mirror is not needed. A telescope is arranged on a tripod, wherein a front foot of the tripod is arranged on the upper end face of a movable clamping head of the steel wire, and the other two rear feet are arranged in a small end face groove of a workbench with a groove of the Young's elastic modulus tester. The optical axis of the telescope is parallel to a vertical line of the connection line of the front foot and the two rear feet of the tripod. A scaleplate component is put on the right front of the optical axis of the telescope, and during debugging, the optical axis of the telescope is horizontally aligned to the middle of the scaleplate by eye measurement. The focal lengths of an eyepiece and an objective lens of the telescope are fine debugged so as to ensure that a scale image is clear. Then high and low positions are also debugged, and other operations are carried out as a routine method. Because the target of the scaleplate is large, and the optical axis of the telescope is directly aligned to the scaleplate, an operator is easy to align to the target and debug the focal length. Because the plane mirror is not used, the loss of breaking the plane mirror is radically avoided.
Description
Affiliated field
The present invention relates to a kind of drawing optical lever young elastic modulus detection device.
Background technology
With pulling method measuring steel wire Young's modulus of elasticity, be the classical Fundamental Physics Experiments that many colleges and universities offer.The stroke of invar silk in elastic range is very little, is difficult to accurately measure with general length measuring instrument or conventional method, thereby is difficult to accurately measure its Young's modulus of elasticity, and plane mirror optical lever method now commonly used is amplified the small stroke of steel wire.Survey in the steel wire Young's modulus of elasticity process in this plane mirror optical lever method, at first to regulate plane mirror optical lever imaging system and could observe the variation of rod reading, require at first alignment surface catoptron of telescope optic axis, scale picture in the alignment surface catoptron again, promptly require scale and telescope optic axis should be on the incident light and reflected light circuit of plane mirror, also must mix up telescopical imaging focal length simultaneously, could clearly observe scale label, this adjustment process is very complicated, it is very difficult that many students feel, the optical lever imaging system that often takes long to and also transfer bad plane mirror, thereby be difficult to finish smoothly the test job of Young's modulus of elasticity.Simultaneously, described plane mirror is the parts that drop to the ground and break the most easily and often in this instrument.
Summary of the invention
Regulate the problem that difficulty causes that measurement Young's modulus of elasticity difficulty and plane mirror are easily broken in order to overcome plane mirror optical lever imaging system, the present invention has designed a kind of Young's elastic modulus tester with optical lever without reflector, can mix up the imaging defocus distance again and get final product with the direct alignment scale of telescope.Because of the scale target greatly and very directly perceived, the tester solves to aim at the mark and focus and just is easy to.
The present invention solves plane mirror optical lever young's elastic modulus tester and regulates difficulty and level crossing and easily break the technical scheme of problem and be, steel wire is fixed by existing apparatus structure mode, do not want plane mirror, telescope is installed on the three-legged support, the forward foot in a step of three-legged support places steel wire active chuck upper surface, two rear feet place in the end face sulculus of young's elastic modulus tester trough of belt worktable, telescope optic axis is parallel to the perpendicular line of the three-legged support forward foot in a step and two rear foot lines, the scale assembly is placed on about 2 meters distant places, dead ahead of telescope optic axis, during debugging, the range estimation telescope optic axis is the alignment scale middle part flatly, fine tuning telescope ocular and objective focal length, and it is clear that scale is resembled, mix up high and low position again, other operations can be carried out routinely, and the plus-minus counterweight writes down corresponding rod reading.The steel wire stroke can calculate according to the small stroke schematic diagram calculation of steel wire (accompanying drawing 2), and its computing formula is as follows:
In the triangle OMN and OPQ of accompanying drawing 2, because of D is far longer than c, can think two approximate right angle triangles, so
a/b＝c/D a＝bc/D
Wherein, the distance that the steel wire active chuck moved up and down when a was the plus-minus counterweight, it is the stroke of steel wire, rod reading variable quantity when b is the plus-minus counterweight, c is the optical lever constant, be that three-legged support places the forward foot in a step and the distance that places two rear foot lines of worktable end face sulculus on the steel wire active chuck, D is the distance of scale to trough of belt worktable end face sulculus.Behind the stroke before and after measuring that steel wire is stressed and changing, measure known and relevant other physical quantitys such as steel wire original length, the steel wire diameter etc. of Young's modulus of elasticity definition again, whole substitution Young's modulus of elasticity defined formulas can calculate Young's modulus of elasticity.
The invention has the beneficial effects as follows, the tester can directly use the telescope alignment scale, this is than alignment scale is much direct, simple again by plane mirror, thereby making the adjusting operation of Young's elastic modulus tester with optical lever without reflector much simple and convenient more than plane mirror optical lever young's elastic modulus tester, this is very meaningful for the people who lacks the optical instrument operating experience.Fundamentally overcome simultaneously the problem that plane mirror is easily broken.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the apparatus structure synoptic diagram of the present invention and embodiment.
Fig. 2 is the small stroke schematic diagram calculation of the steel wire of the present invention and embodiment
Fig. 3 is the three-legged support synoptic diagram figure of the present invention and embodiment
Among the figure, 1, instrument base, 2, counterweight, 3, hook pallet, 4, the steel wire housing screw, 5, the steel wire pressing plate, 6, steel wire active chuck, 7, the trough of belt worktable, 8, three-legged support, 9, telescope, 10, column, 11, steel wire, 12, entablature, 13, scale, 14, the scale gib screw, 15, the scale plate, 16, scale column, 17 scale plate gib screws, 18, rear sight base, 19, the three-legged support rear foot 1,20, two rear foot lines, 21, the perpendicular line of the forward foot in a step and two rear foot lines, the 22 three-legged support forward foot in a step, 23, the three-legged support rear foot 2.
Specific embodiments
In the drawings, instrument base 1, trough of belt worktable 7, entablature 12 and column 10 constitute the basic framework of young's elastic modulus tester, steel wire to be measured 11 upper ends are fixed on the entablature 12, the lower end links to each other with hook pallet 3, steel wire active chuck 6 is fastened on the steel wire by steel wire briquetting 5 and steel wire housing screw 4, telescope is fixed on the three-legged support upper surface, the forward foot in a step 22 of three-legged support 8 places the upper surface of steel wire active chuck 6, two rear feet 19 of three-legged support 8,23 place the end face sulculus of trough of belt worktable, telescope optic axis is parallel to the three-legged support forward foot in a step 22 and two rear feet 19, the perpendicular line 21 of 23 lines 20, scale is installed on the scale assembly, the scale assembly is by scale 13, scale gib screw 14, scale plate 15, scale column 16, scale plate gib screw 17 and rear sight base 18 are formed, and the scale assembly places about 2 meters distant places, the dead ahead of telescope 9.When regulating the optical lever imaging system, optical axis horizontal aligument scale 13 middle parts of coarse adjustment telescope 9, telescopical eyepiece of thin tuning and objective focal length again, just can find scale image clearly, because of the scale target big, telescope optic axis is again direct alignment scale, thereby the operator is easy to aim at the mark and bring into focus, and other operations get final product routinely.
Claims (3)
1. Young's elastic modulus tester with optical lever without reflector, it is characterized in that steel wire fixes by existing apparatus structure mode, do not want plane mirror, telescope is installed on the three-legged support, the forward foot in a step of three-legged support places steel wire active chuck upper surface, two rear feet place in the end face sulculus of young's elastic modulus tester trough of belt worktable, and telescope optic axis is parallel to the perpendicular line of the three-legged support forward foot in a step and two rear foot lines, and the scale assembly is placed on about 2 meters distant places, dead ahead of telescope optic axis.
2. Young's elastic modulus tester with optical lever without reflector according to claim 1 is characterized in that scale is installed on the scale assembly, and the scale assembly is made up of scale, scale gib screw, scale plate, scale column, scale plate gib screw and rear sight base.
3. Young's elastic modulus tester with optical lever without reflector according to claim 1, when it is characterized in that debugging, the range estimation telescope optic axis is the alignment scale middle part flatly, fine tuning telescope ocular and objective focal length again, it is clear that scale is resembled, and mixes up high and low position again, and other operations are carried out routinely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100601619A CN101620044B (en) | 2009-07-29 | 2009-07-29 | Young's elastic modulus tester with optical lever without reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100601619A CN101620044B (en) | 2009-07-29 | 2009-07-29 | Young's elastic modulus tester with optical lever without reflector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101620044A true CN101620044A (en) | 2010-01-06 |
| CN101620044B CN101620044B (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100601619A Expired - Fee Related CN101620044B (en) | 2009-07-29 | 2009-07-29 | Young's elastic modulus tester with optical lever without reflector |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445393A (en) * | 2010-10-08 | 2012-05-09 | 四川大学 | Novel electronic-scale-based continuous stepless forcing device |
| CN102445387A (en) * | 2010-10-11 | 2012-05-09 | 四川大学 | Young's elasticity modulus Moire fringe measuring instrument |
| CN103065999A (en) * | 2013-01-14 | 2013-04-24 | 无锡市玉祁红光电子有限公司 | Thimble, chip and suction nozzle of semiconductor mounting equipment three-point on-line detecting method |
| CN104897474A (en) * | 2015-06-11 | 2015-09-09 | 湖南城市学院 | Experiment instrument for measuring Young's modulus of metal wire according to direct laser method |
| CN109991082A (en) * | 2019-03-28 | 2019-07-09 | 武汉东湖学院 | A kind of young modulus measuring device |
| CN114577142A (en) * | 2022-03-25 | 2022-06-03 | 浙江贝盛光伏股份有限公司 | Detection device and detection method for bending change of optical lever measurement assembly |
-
2009
- 2009-07-29 CN CN2009100601619A patent/CN101620044B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445393A (en) * | 2010-10-08 | 2012-05-09 | 四川大学 | Novel electronic-scale-based continuous stepless forcing device |
| CN102445387A (en) * | 2010-10-11 | 2012-05-09 | 四川大学 | Young's elasticity modulus Moire fringe measuring instrument |
| CN103065999A (en) * | 2013-01-14 | 2013-04-24 | 无锡市玉祁红光电子有限公司 | Thimble, chip and suction nozzle of semiconductor mounting equipment three-point on-line detecting method |
| CN104897474A (en) * | 2015-06-11 | 2015-09-09 | 湖南城市学院 | Experiment instrument for measuring Young's modulus of metal wire according to direct laser method |
| CN109991082A (en) * | 2019-03-28 | 2019-07-09 | 武汉东湖学院 | A kind of young modulus measuring device |
| CN109991082B (en) * | 2019-03-28 | 2024-03-08 | 武汉东湖学院 | Young modulus measuring device |
| CN114577142A (en) * | 2022-03-25 | 2022-06-03 | 浙江贝盛光伏股份有限公司 | Detection device and detection method for bending change of optical lever measurement assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101620044B (en) | 2011-05-11 |
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Granted publication date: 20110511 Termination date: 20120729 |