CN102706744B - Optical lever for tensile Young's modulus measurement - Google Patents
Optical lever for tensile Young's modulus measurement Download PDFInfo
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- CN102706744B CN102706744B CN201210179590.XA CN201210179590A CN102706744B CN 102706744 B CN102706744 B CN 102706744B CN 201210179590 A CN201210179590 A CN 201210179590A CN 102706744 B CN102706744 B CN 102706744B
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- trapezoidal
- wheel
- optical lever
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- 230000003287 optical effect Effects 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 title abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 35
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000011514 reflex Effects 0.000 description 1
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Abstract
一种拉伸式杨氏模量测量的光杠杆涉及物理量测量装置领域。拉伸式杨氏模量测量中的光杠杆在测量时定位比较困难，导致使用游标卡尺测量时达不到游标卡尺的精度。为克服杨氏模量光杠杆测量的麻烦，本发明将光杠杆固定在金属丝上。本发明的技术方案是：高度10cm的梯形金属架，梯形金属架的上部有一个中部断开的金属圆筒，一个金属圆柱，中间有一个通孔，可以穿过金属丝，金属圆柱有一个螺纹孔，金属圆筒可绕着金属圆柱旋转。平面镜固定在梯形金属架上，平面镜呈现梯形，平面镜底部有一个轮子，轮子的直径10mm，轮子所处的台面有刻度圆环。本发明的有益效果是：测量简单，操作方便。
An optical lever for stretching Young's modulus measurement relates to the field of physical quantity measuring devices. It is difficult to position the optical lever in the measurement of tensile Young's modulus, so that the accuracy of the vernier caliper cannot be achieved when the vernier caliper is used for measurement. In order to overcome the trouble of Young's modulus optical lever measurement, the present invention fixes the optical lever on the metal wire. The technical scheme of the present invention is: a trapezoidal metal frame with a height of 10cm, a metal cylinder with a disconnected middle part on the upper part of the trapezoidal metal frame, a metal cylinder with a through hole in the middle, which can pass through the metal wire, and the metal cylinder has a screw thread hole, the metal cylinder can rotate around the metal cylinder. The flat mirror is fixed on the trapezoidal metal frame, and the flat mirror presents a trapezoidal shape. There is a wheel at the bottom of the flat mirror. The diameter of the wheel is 10mm, and the table where the wheel is located has a scale ring. The invention has the beneficial effects of simple measurement and convenient operation.
Description
Technical field
The present invention relates to physical amount measuring device field, the optical lever that particularly tinsel Young modulus is used in measuring.
Background technology
Optical lever in drawing Young modulus measurement is to be fixed on a metal support, originally need to measure the rear foot of optical lever to the distance of minute surface, but be generally all reduced to the distance of the rear foot to two forward foot in a step of measuring optical lever, if the line of two forward foot in a step is not in minute surface, can cause measurement to have larger error, and the pin of optical lever is thicker, the contact point causing is larger, when measuring, contrast locating is more difficult, does not reach the precision of vernier caliper while causing using vernier caliper measurement.
In order to reduce the friction between tinsel chuck and table top through hole, between chuck wiry and through hole, generally there are some spaces, the rear foot of optical lever to fall into space and will cause measurement above to be cancelled.
Summary of the invention
The trouble of measuring for overcoming Young modulus optical lever, the present invention is fixed on optical lever on tinsel.
The technical scheme that the present invention solves its technical matters employing is:
The trapezoidal metal frame of a height 10cm, a metallic cylinder is arranged at the top of trapezoidal metal frame, and the middle part of metallic cylinder disconnects and makes metallic cylinder be divided into two parts.
A metal cylinder, there is a through hole centre, can pass tinsel, and metal cylinder has a threaded hole metal column to be fixed on tinsel by screw, and metallic cylinder can be rotated around metal cylinder.
Level crossing is fixed in trapezoidal metal frame, and level crossing presents trapezoidal, trapezoidal height 6cm, bottom width 5cm, upper width 4cm.
A wheel is arranged at level crossing bottom, the diameter 10mm of wheel, and the residing table top of wheel has scale annulus.
A diaphragm is arranged at scale bottom, and the diameter of diaphragm is 1mm, and the laser that laser instrument sends is irradiated to level crossing through diaphragm, then from flat mirror reflects to scale.
The invention has the beneficial effects as follows: measure simple, easy to operate.
Accompanying drawing explanation
Fig. 1 is optical lever schematic diagram (front elevation).
Fig. 2 is optical lever schematic diagram (side view) and scale.
Wherein, 1, tinsel, 2, trip bolt, 3, metal column, 4, metallic cylinder, 5, trapezoidal metal frame, 6, level crossing, 7, wheel, 8, calibration loop, 9, scale, 10, diaphragm, 11, laser instrument.
Embodiment
A point of fixity of tinsel 1 is in the position of trip bolt 2, and in the above, the length of two fastening point is exactly effective length wiry to another fastening point.
The diameter 10mm of wheel 7
.
The radius 5mm(that original state allows wheel subcenter and distance wiry be wheel is that wheel is close to tinsel), wheel is trapezoidal metal frame height 10cm=100mm to the distance of point of fixity, and initial angle is roughly 5mm/10cm=1/20.When weight is drop-down, cause the elongated delta L of tinsel, cause accordingly the outside mobile delta r of wheel, 100
2+ 5
2=(100+delta L)
2+ (5+delta r)
2so, the variable quantity delta r/L=20 delta L/L of angle; Angle causes the light spot position of laser on scale to change after changing, if the distance that luminous point changes is delta x, because tinsel moves down, cause level crossing to move and normal direction is changed, thereby the differential seat angle between reflection angle and incident angle is 2delta r/L=40delta L/L, if the distance of laser distance minute surface is D, the distance that laser spot moves is delta x=2delta r/L*D=40delta L/L*D, the present embodiment suggestion L=10cm, D=1000mm, delta x=400delta L.
In experiment, to first add 1 or 2 counterweights, observe reflex to scale laser spot whether can on move, if not can, show that table top is too low, wheel does not also contact table top, table top will on move a bit; If movement has occurred luminous point, wheel contacts with table top well, can record luminous point reading now, then increases counterweight, observes the movement of luminous point.
Claims (1)
1. the optical lever that drawing Young modulus is measured, comprise trapezoidal metal frame, metal column, level crossing, wheel, it is characterized in that: trapezoidal metal frame height is 10cm, a metallic cylinder is arranged at the top of trapezoidal metal frame, and the middle part of metallic cylinder disconnects and makes metallic cylinder be divided into two parts; A metal column, there is a through hole centre, can pass tinsel, has a threaded hole, by screw, metal column is fixed on tinsel, and metallic cylinder can be rotated around metal column; Level crossing is fixed in trapezoidal metal frame, and level crossing presents trapezoidal, trapezoidal height 6cm, bottom width 5cm, upper width 4cm, and a wheel is arranged at level crossing bottom; The diameter 10mm of wheel, the residing table top of wheel has scale annulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210179590.XA CN102706744B (en) | 2012-06-04 | 2012-06-04 | Optical lever for tensile Young's modulus measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210179590.XA CN102706744B (en) | 2012-06-04 | 2012-06-04 | Optical lever for tensile Young's modulus measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102706744A CN102706744A (en) | 2012-10-03 |
| CN102706744B true CN102706744B (en) | 2014-03-26 |
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ID=46899687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210179590.XA Expired - Fee Related CN102706744B (en) | 2012-06-04 | 2012-06-04 | Optical lever for tensile Young's modulus measurement |
Country Status (1)
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| CN (1) | CN102706744B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033420B (en) * | 2012-12-17 | 2014-07-16 | 重庆理工大学 | Novel tensile-method young's modulus measurement instrument |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1391096A (en) * | 2002-07-25 | 2003-01-15 | 四川大学 | Reversely hung Yong's modulus measurer |
| CN1948941A (en) * | 2006-11-06 | 2007-04-18 | 四川大学 | Young's modulus meter without mobile gripping head |
-
2012
- 2012-06-04 CN CN201210179590.XA patent/CN102706744B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1391096A (en) * | 2002-07-25 | 2003-01-15 | 四川大学 | Reversely hung Yong's modulus measurer |
| CN1948941A (en) * | 2006-11-06 | 2007-04-18 | 四川大学 | Young's modulus meter without mobile gripping head |
Non-Patent Citations (4)
| Title |
|---|
| 常效奇等.材料杨氏弹性模量的简易测量.《鞍山钢铁学院学报》.1995,第18卷(第2期),61-64. |
| 微小形变量的几种测量方法讨论;李凡生;《南宁师范高等专科学校学报》;20091231;第26卷(第66期);123-125 * |
| 李凡生.微小形变量的几种测量方法讨论.《南宁师范高等专科学校学报》.2009,第26卷(第66期),123-125. |
| 材料杨氏弹性模量的简易测量;常效奇等;《鞍山钢铁学院学报》;19950630;第18卷(第2期);61-64 * |
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| Publication number | Publication date |
|---|---|
| CN102706744A (en) | 2012-10-03 |
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