CN102967764B - The measuring method of tinsel resistance to be measured in modulus measurer - Google Patents
The measuring method of tinsel resistance to be measured in modulus measurer Download PDFInfo
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- CN102967764B CN102967764B CN201210548411.5A CN201210548411A CN102967764B CN 102967764 B CN102967764 B CN 102967764B CN 201210548411 A CN201210548411 A CN 201210548411A CN 102967764 B CN102967764 B CN 102967764B
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Abstract
The present invention relates to the measuring method of tinsel resistance to be measured in a kind of modulus measurer, the method comprises the following steps: step I: be placed on by seal between the center pit on lower dop and platform or between upper chuck and crossbeam, makes mutually insulated between tinsel and described platform or crossbeam; Step I i: with electric measurement method, measures the resistance value obtained between tinsel upper/lower terminal.According to the measuring method of tinsel resistance to be measured in modulus measurer of the present invention, electric measurement method can and then be utilized to measure length wiry.<!--1-->
Description
Technical field
The present invention relates to a kind of Experiment of Measuring Young's measuring method, particularly the measuring method of tinsel resistance to be measured in a kind of modulus measurer.
Background technology
If an object is long is L, cross-sectional area is S, after the F that exerts a force along its length, object has extended (or shortening) △ L.F/S is the acting force in unit area, is called stress; △ L/L is relative deformation amount, is called strain.Within the scope of elastic deformation, according to Hooke's law, the stress of interior of articles is proportional to strain, and its ratio is called Young modulus.Experiment proves, length L, the cross-sectional area S of Young modulus E and sample and the size of externally applied forces F have nothing to do, and only depend on the material of sample.Consider from micromechanism, Young modulus is a physical parameter characterizing Binding Forces Between Atoms size.
Measure Young modulus have static method and dynamic method point.Dynamic method is the method based on vibration, and static method is directly afterburning to sample, measures deformation.Dynamic method measuring speed is fast; Static method principle is directly perceived, and equipment is simple.In Experiment of College Physics, general employing is all static method.
Survey the modulus measurer of Young modulus wiry use by static stretch method, its structure comprises weight group, optical lever and telescope-scale device.Specifically, as depicted in figs. 1 and 2, triangle base 6 fills two pillars, and there is crossbeam pillar upper end, the fastening platform 3 in middle part, forms the support that a rigidity is fabulous.Be out of shape minimum after whole support force, can ignore.Testing sample is the tinsel 1 of an even thickness.Tinsel 1 upper end upper chuck clamps and is fixed on entablature, and lower end clamps with a cylindrical lower dop and passes the center pit 9 of platform 3, makes tinsel free suspension.By the screw of adjusting triangle base 6, make whole support vertical.Lower dop is in the center pit 9 of platform 3, and around it, gap evenly and not rubs with the limit, hole of center pit 9.Hook 4 below lower dop hangs a scale pan, and after dish successively adds the counterweight 5 of certain mass, tinsel 1 is just stretched.Namely the slippage of the upper surface opposed platforms 3 of lower dop is the elongation △ L of tinsel 1.The length L of tinsel 1 is exactly the length between the upper surface from the lower surface of upper chuck to lower dop.Platform 3 is provided with optical lever 2, and scale 7 and telescope 8 are used for coordinating the elongation △ L of optical lever 2 pairs of tinsels 1 to carry out reading, and the elongation △ L of tinsel 1 is very small.
The shortcoming that above-mentioned modulus measurer of the prior art exists, when measuring length L wiry, needs to use meter ruler and carry out reading measurement.Because support is very high, read the reading relative difficulty that upper and lower dop is corresponding, in measuring process, general needs two people coordinate, and the common alignment upper and lower dop of tinsel also carries out reading simultaneously.Above-mentioned reading measuring process cannot people's complete independently.In addition on the one hand, realize linear measure longimetry wiry if want in prior art, resistance wiry can be measured by electrical method, and then calculate its length by sectional area wiry and resistrivity meter.But, due to the tinsel to be measured in modulus measurer and the overall UNICOM of metal support.Thus by drawing the resistance value that obtains of tracerse survey, be in fact tinsel to be measured in parallel with support after result.At present, the accurate result of the tinsel resistance to be measured in modulus measurer cannot be obtained in prior art.
Summary of the invention
The invention provides a kind of measuring method can measuring tinsel resistance to be measured in modulus measurer.
Technical scheme of the present invention is specific as follows:
A measuring method for tinsel resistance to be measured in modulus measurer, the method comprises the following steps:
Step I: be placed on by seal between the center pit on lower dop and platform or between upper chuck and crossbeam, makes mutually insulated between tinsel and described platform or crossbeam;
Step I i: with electric measurement method, measures the resistance value obtained between tinsel upper/lower terminal.
In described step I i, electrically measure the resistance value between tinsel upper/lower terminal, be by the metal filament, lower two ends clamp a metal holder respectively, then extend wire and measure from metal holder;
When seal is placed between the center pit on lower dop and platform, the seal in described step I is that resistance is greater than or equal in described center pit and encloses girth, and one section has flexible dielectric film.
In technique scheme, described dielectric film top is provided with the multiple support bars preventing its landing from described center pit.
In technique scheme, described dielectric film can stretch into the part in described center pit, is greater than or equal to the height of described center pit.
The present invention has the following advantages:
The measuring method of tinsel resistance to be measured in modulus measurer of the present invention, the resistance value to be measured wiry in modulus measurer can be measured, and then utilize electric measurement method to measure length wiry, there is metering system simple, direct, the advantage that measurement result is accurate, error is little.
The measuring method of tinsel resistance to be measured in modulus measurer of the present invention, utilizes and has flexible dielectric film by one section and be placed in the center pit of platform, makes flexible fastening that it relies on self to launch at central hole location.The insulating method of above-mentioned tinsel and platform is simply effective, can ensure that resistance measurement wiry is simple and accurate.
The measuring method of tinsel resistance to be measured in modulus measurer of the present invention, being used for the top of dielectric film of insulating effect is provided with multiple support bar, and it effectively can prevent dielectric film landing from center pit.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the structural representation of modulus measurer.
Fig. 2 is the structure for amplifying schematic diagram of position of platform in modulus measurer shown in Fig. 1.
Fig. 3 is a kind of embodiment schematic diagram of the seal used in measuring method of the present invention;
Fig. 4 is the schematic perspective view of seal rolled state in embodiment shown in Fig. 3;
Reference numeral in figure is expressed as:
1-tinsel; 2-optical lever; 3-platform; 4-links up with; 5-counterweight; 6-triangle base; 7-scale; 8-telescope; 9-center pit; 10-insulated ring; 11-support bar.
Embodiment
Invention thought of the present invention is: utilize electric measurement method to measure length wiry, makes experiment measuring can single complete independently.Specifically, being by arranging seal in the center pit of platform, making to insulate between tinsel and platform, or by arranging seal between upper chuck and crossbeam, make to insulate between tinsel and crossbeam; Then utilize and extend at upper and lower two ends wiry the measurement that wire carries out whole resistance wiry.Again according to measuring any one section of resistance value wiry of obtaining and length, calculating to whole length wiry.
Below in conjunction with accompanying drawing, the present invention is described in detail.
As Figure 1-4, the modulus measurer that measuring method of the present invention is suitable for comprises: tinsel 1; Optical lever 2; Platform 3; Hook 4; Counterweight 5; Triangle base 6; Scale 7; Telescope 8.Wherein platform 3 is provided with center pit 9.The seal that measuring method of the present invention uses is insulated ring 10, and its top is provided with multiple support bar 11.
The measuring method of tinsel resistance to be measured in a kind of modulus measurer of the present invention, the method comprises the following steps:
Step I: dielectric film 10 is placed between the center pit 9 on lower dop and platform 3, makes mutually insulated between tinsel and described platform;
Step I i: with electric measurement method, measures the resistance value obtained between tinsel upper/lower terminal.
In step I i, electrically measuring the resistance value between tinsel upper/lower terminal, is by clamping a metal holder respectively at the upper/lower terminal of any one section of tinsel 1, then extends wire and measure from metal holder.
The length of described dielectric film 10 is greater than or equal in described center pit 9 encloses girth, has certain elasticity spread apart; Described dielectric film 10 can stretch into the part in described center pit 9, is greater than or equal to the height of described center pit 9.Make flexible fastening that dielectric film 10 relies on self to launch at central hole location, this insulated metallic filaments 1 is simply effective with the method for platform 3, can ensure that resistance measurement wiry is simple and accurately.
Described dielectric film 10 top is also provided with the multiple support bars 11 preventing its landing from described center pit 9.Multiple described support bar 11, can obtain by being cut off respectively by dielectric film 10 top scissors, it effectively can prevent dielectric film 10 landing from center pit.
In other embodiment, by arranging seal between upper chuck and crossbeam, making to insulate between tinsel and crossbeam, equally also can carry out the measurement of Electric Resistance Value of Metal; Seal can be one deck dielectric film be arranged between upper chuck and crossbeam.Concrete resistance measurement method is same as the previously described embodiments, repeats no more here.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (3)
1. the measuring method of tinsel resistance to be measured in modulus measurer, it is characterized in that, the method comprises the following steps:
Step I: be placed on by seal between the center pit (9) on lower dop and platform (3) or between upper chuck and crossbeam, makes mutually insulated between tinsel (1) and described platform (3) or crossbeam;
Step I i: with electric measurement method, measures the resistance value obtained between tinsel (1) upper/lower terminal;
In described step I i, electrically measure the resistance value between tinsel (1) upper/lower terminal, being by clamping a metal holder respectively at tinsel (1) upper/lower terminal, then extending wire and measure from metal holder;
When seal is placed between the center pit (9) on lower dop and platform (3), seal in described step I is that length is greater than or equal in described center pit (9) and encloses girth, and one section has flexible dielectric film (10).
2. measuring method according to claim 1, is characterized in that, described dielectric film (10) top is provided with the multiple support bars (11) preventing its landing from described center pit (9).
3. measuring method according to claim 1, is characterized in that, described dielectric film (10) can stretch into the part in described center pit (9), is greater than or equal to the height of described center pit (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210548411.5A CN102967764B (en) | 2012-12-17 | 2012-12-17 | The measuring method of tinsel resistance to be measured in modulus measurer |
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| CN201210548411.5A CN102967764B (en) | 2012-12-17 | 2012-12-17 | The measuring method of tinsel resistance to be measured in modulus measurer |
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| CN102967764A CN102967764A (en) | 2013-03-13 |
| CN102967764B true CN102967764B (en) | 2015-10-28 |
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| CN103954836B (en) * | 2014-04-23 | 2017-08-11 | 北京化工大学 | A kind of carbon mono-filaments specific insulation method of testing and its test bracket used |
| CN111964603A (en) * | 2020-09-15 | 2020-11-20 | 中北大学 | Optical lever-based calibration method for fiber Bragg grating strain sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3319460A (en) * | 1963-06-05 | 1967-05-16 | Electronique Appliquee | Device for determining the modulus of young of visco-elastic materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003035641A (en) * | 2001-07-23 | 2003-02-07 | Ueda Seni Kagaku Shinkokai | Method and equipment for measuring young's modulus and tensile strength of fragile fiber material simultaneously |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3319460A (en) * | 1963-06-05 | 1967-05-16 | Electronique Appliquee | Device for determining the modulus of young of visco-elastic materials |
Non-Patent Citations (4)
| Title |
|---|
| 伸长法测量金属杨氏模量实验的改进;朱湘柱;《邵阳师专学报》;19951031(第5期);第49页第2节 * |
| 杨氏模量实验的优化研究;段坤杰等;《许昌学院学报》;20110331;第30卷(第2期);第35-38页 * |
| 用惠斯登电桥测定杨氏模量;李伟;《甘肃高师学报》;20081231;第13卷(第5期);第47-50页 * |
| 用示差法和电阻法测定杨氏模量;李德地;《陕西教育》;20080430;第76页的【试验仪器和用具】及【试验过程】，及附图 * |
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