CN101639427A - Young modulus of elasticity tester of capacitance-grid type digital dial gauge - Google Patents
Young modulus of elasticity tester of capacitance-grid type digital dial gauge Download PDFInfo
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- CN101639427A CN101639427A CN200910060186A CN200910060186A CN101639427A CN 101639427 A CN101639427 A CN 101639427A CN 200910060186 A CN200910060186 A CN 200910060186A CN 200910060186 A CN200910060186 A CN 200910060186A CN 101639427 A CN101639427 A CN 101639427A
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- steel wire
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Abstract
The invention discloses a Young modulus of elasticity tester of a capacitance-grid type digital dial gauge, mainly comprising a steel wire movable collet, a workbench, an instrument stand and a capacitance-grid type digital dial gauge, wherein, the movable collet is arranged in a workbench guide slot, the instrument stand is installed above the workbench, the capacitance-grid type digital dial gauge is fixed on the instrument stand, and the measuring rod end of the digital dial gauge is in favorable contact with the upper end surface of the movable collet; when tension force applying to steelwire is changed, the length of the steel wire is changed; the steel wire movable collet generates displacement, and the capacitance-grid type digital dial gauge also generates identical displacement;the capacitance-grid type digital dial gauge displays a corresponding reading, a survey person records the readings of the capacitance-grid type digital dial gauge before and after tension force changes, and the difference is length changing amount of the steel wire; the length changing amount, steel wire diameter, steel wire original length and corresponding tension force changing amount are substituted into the define formula of Young modulus of elasticity so as to calculate the Young modulus of elasticity of the steel wire.
Description
Affiliated technical field
The present invention relates to a kind of Young's modulus of elasticity proving installation of steel wire.
Background technology
It is one of many colleges and universities Fundamental Physics Experiments of offering that pulling method is surveyed steel wire Young's modulus of elasticity (Young's modulus of elasticity is a kind of material property specific term), the invar silk is subjected to the elongation behind the pulling force very small, the method that adopts optical lever to amplify is measured now, in measuring process, the student regulates optical lever imaging system operating difficulties, calculating is loaded down with trivial details, because of the minimum calibration of scale only is 1mm, so measuring accuracy is not high, because of telescope and scale assembly from one meter of Young's modulus of elasticity proving installation framework how far, so that instrument takies lab space is big.
Summary of the invention
The optical lever method is surveyed steel wire Young's modulus of elasticity student operating difficulties, calculating is loaded down with trivial details, measuring accuracy is not high in order to overcome, instrument takies the big deficiency that waits of lab space, the present invention designed a kind of with the direct measuring steel wire of capacitance-grid type digital dial gauge the stroke after stressed, thereby measure the device of its Young's modulus of elasticity.
The technical scheme that the present invention solves optical lever amplifying method survey steel wire Young's modulus of elasticity problem is: fully without the optical lever amplification system, directly utilize capacitance-grid type digital dial gauge can measure the characteristics of micron order length variable quantity, can accurately measure the stroke of steel wire after stressed fully.This Young modulus of elasticity tester of capacitance-grid type digital dial gauge mainly comprises worktable, instrument calibration and the capacitance-grid type digital dial gauge of Young's modulus of elasticity proving installation framework, steel wire active chuck, tape guide groove.On steel wire, fix an active chuck, active chuck can only slide in the gathering sill of worktable, an instrument calibration is installed in worktable gathering sill top, capacitance-grid type digital dial gauge is fixed on the instrument calibration, the sounding rod termination of capacitance-grid type digital dial gauge well contacts with steel wire active chuck upper surface, after the suffered pulling force of steel wire changes, steel wire length changes thereupon, the steel wire active chuck produces displacement in the gathering sill of worktable, the capacitance-grid type digital dial gauge sounding rod also can produce identical displacement, capacitance-grid type digital dial gauge demonstrates corresponding reading, survey crew is write down the capacitance-grid type digital dial gauge reading that pulling force changes front and back, its difference is exactly the length variations amount of steel wire, with this length variations amount, steel wire diameter, the original length of tested steel wire and corresponding tension variations amount substitution Young's modulus of elasticity defined formula just can calculate the Young's modulus of elasticity of this steel wire.
The invention has the beneficial effects as follows, 1, capacitance-grid type digital dial gauge is a kind of precision measurement instrument, can directly read the micro-displacement of per mille millimeter, test result is direct and precision is high, 2, the capacitance-grid type digital dial gauge volume is little, be installed in by the steel wire, than the telescope in the optical lever amplifying method and scale erecting frame how far from one meter on steel wire, it is much smaller to take lab space, and 3, it is very difficult that the student regulates the operation of optical lever imaging system, the student who has even be difficult to access the optical lever imaging system so that can't finish experiment, and device adjusting of the present invention is very simple, 4, and the manufacturing cost of device of the present invention and maintenance cost are also much lower than optical lever amplifying method Young's modulus of elasticity proving installation.
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
Among the figure 1, counterweight, 2, the hook pallet, 3, the steel wire active chuck, 4, capacitance-grid type digital dial gauge sounding rod, 5, the worktable of tape guide groove, 6, the capacitance-grid type digital dial gauge gib screw, 7, instrument calibration, 8, instrument calibration trip bolt, 9, capacitance-grid type digital dial gauge, 10, Young's modulus of elasticity proving installation framework entablature, 11, steel wire, 12, steel wire active chuck attachment screw, 13, the steel wire briquetting, 14, gathering sill.
Embodiment
In Fig. 1, one end of tested steel wire (11) is fixed on the entablature (10) of Young's modulus of elasticity proving installation framework, other end coupling hook pallet (2), can add and subtract counterweight (1) on the hook pallet (2), on steel wire (11), fix a steel wire active chuck (3) near hook five centimeters, steel wire active chuck (3) can only slide in the gathering sill (14) of the worktable (5) of tape guide groove, worktable (5), an instrument calibration (7) is installed in gathering sill (14) top, capacitance-grid type digital dial gauge (9) is fixed on the instrument calibration (7), the termination of the sounding rod (4) of capacitance-grid type digital dial gauge (9) well contacts with the upper surface of steel wire active chuck (3), after being subjected to pulling force, steel wire (11) elongates or shortens, steel wire active chuck (3) produces displacement thereupon in the gathering sill (14) of worktable (5), drive capacitance-grid type digital dial gauge sounding rod (4) and also produce identical displacement thereupon, the reading of capacitance-grid type digital dial gauge (9) also changes thereupon, this has just realized the direct measurement of capacitance-grid type digital dial gauge (9) to steel wire (11) length variations amount, survey crew is write down the reading of the capacitance-grid type digital dial gauge (9) before and after the pulling force that adds deduct, and its difference is exactly the length variations amount of steel wire (11).This steel wire length variable quantity, steel wire diameter, length and corresponding tension variations amount substitution Young's modulus of elasticity defined formula just can be calculated the Young's modulus of elasticity of this steel wire.
Claims (2)
1. Young modulus of elasticity tester of capacitance-grid type digital dial gauge, it mainly comprises Young's modulus of elasticity proving installation framework, the steel wire active chuck, worktable, instrument calibration and capacitance-grid type digital dial gauge, an end that it is characterized in that tested steel wire is fixed on the entablature of Young's modulus of elasticity proving installation framework, other end coupling hook pallet, on steel wire, fix an active chuck, active chuck can only slide in the gathering sill of worktable, an instrument calibration is installed in worktable gathering sill top, capacitance-grid type digital dial gauge is fixed on the instrument calibration, and the sounding rod termination of capacitance-grid type digital dial gauge well contacts with steel wire active chuck upper surface.
2. Young modulus of elasticity tester of capacitance-grid type digital dial gauge according to claim 1, it is characterized in that after the suffered pulling force of steel wire changes, steel wire length changes thereupon, the steel wire active chuck produces displacement in the gathering sill of worktable, the capacitance-grid type digital dial gauge sounding rod also can produce identical displacement, capacitance-grid type digital dial gauge demonstrates corresponding reading, survey crew only need be write down the capacitance-grid type digital dial gauge reading that pulling force changes front and back, its difference is exactly the length variations amount of steel wire, with this length variations amount, steel wire diameter, steel wire original length and corresponding tension variations amount substitution Young's modulus of elasticity defined formula just can calculate the Young's modulus of elasticity of this steel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910060186A CN101639427A (en) | 2009-07-31 | 2009-07-31 | Young modulus of elasticity tester of capacitance-grid type digital dial gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910060186A CN101639427A (en) | 2009-07-31 | 2009-07-31 | Young modulus of elasticity tester of capacitance-grid type digital dial gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101639427A true CN101639427A (en) | 2010-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN200910060186A Pending CN101639427A (en) | 2009-07-31 | 2009-07-31 | Young modulus of elasticity tester of capacitance-grid type digital dial gauge |
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| CN (1) | CN101639427A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359760A (en) * | 2014-11-18 | 2015-02-18 | 南华大学 | Capacitive grating sensing digital displacement type Young modulus measurement instrument |
| CN104849138A (en) * | 2015-03-23 | 2015-08-19 | 同济大学 | Apparatus for measuring film compression modulus |
| CN109490090A (en) * | 2018-11-19 | 2019-03-19 | 长安大学 | A kind of rubber material elasticity modulus measuring device and measuring method |
-
2009
- 2009-07-31 CN CN200910060186A patent/CN101639427A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359760A (en) * | 2014-11-18 | 2015-02-18 | 南华大学 | Capacitive grating sensing digital displacement type Young modulus measurement instrument |
| CN104849138A (en) * | 2015-03-23 | 2015-08-19 | 同济大学 | Apparatus for measuring film compression modulus |
| CN109490090A (en) * | 2018-11-19 | 2019-03-19 | 长安大学 | A kind of rubber material elasticity modulus measuring device and measuring method |
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Open date: 20100203 |