CN102637377A - Rotational inertia tester capable of measuring gravity acceleration - Google Patents
Rotational inertia tester capable of measuring gravity acceleration Download PDFInfo
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- CN102637377A CN102637377A CN2012101072370A CN201210107237A CN102637377A CN 102637377 A CN102637377 A CN 102637377A CN 2012101072370 A CN2012101072370 A CN 2012101072370A CN 201210107237 A CN201210107237 A CN 201210107237A CN 102637377 A CN102637377 A CN 102637377A
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Abstract
The invention discloses a rotational inertia tester capable of measuring gravity acceleration, relating to the measurement of gravity acceleration. The period formula of torsional pendulum rotation and the period formula of compound pendulum swinging have the same form, thus, a torsional pendulum rotation inertia tester can be used for measuring the gravity acceleration by certain combination. According to the technical scheme, when an oscillating bar is vertical, the oscillating bar becomes a compound pendulum, the measurement period T1 = 2*Pi*(I/(mgh))1/2; when the oscillating bar is fixed, the period T2 = 2*Pi*(I/(mgh+K))1/2; when the oscillating bar is horizontal, the period T3 = 2*Pi*(I/K)1/2; and h is known, the mass of the oscillating bar and the three periods are measured so as to obtain the gravity acceleration g. The tester is changed less; the tester is simple to regulate and quick in measurement; the functions of the torsional pendulum are expanded; the torsional pendulum and the compound pendulum are linked effectively, knowledge fusion is improved, expansion of the visual field of students is facilitated, and the students are helped to understand the knowledge deeply.
Description
Technical field
The present invention relates to the measurement of acceleration of gravity, particularly use a kind of special moment of inertia testing apparatus to measure acceleration of gravity.
Background technology
Moment of inertia testing apparatus is used for measuring moment of inertia; General employing is rocked and is measured moment of inertia; It is identical rocking the cycle formula form that the cycle formula of measuring moment of inertia and physical pendulum measure acceleration of gravity, therefore passes through certain combination and just can use torsional pendulum moment of inertia testing apparatus to measure acceleration of gravity.
Summary of the invention
For realizing torsional pendulum moment of inertia testing apparatus measurement acceleration of gravity, the present invention is with two orthogonal horizontal adjustment platform of torsional pendulum moment of inertia testing apparatus design.
The technical scheme that the present invention solves its technical matters employing is: have the one-period tester to measure hunting period, the quality of a balance measurement fork is arranged.Rock vertically, regulate base horizontal adjustment screw and make fork vertical, the swing fork is a physical pendulum at this moment, and cycle and moment of inertia satisfy formula T
1=2*Pi* (I/ (mgh))
1/2, T wherein
1Be hunting period, Pi=3.14156, I is a moment of inertia, and m is a quality, can pass through balance measurement, and g is an acceleration of gravity, and h is the distance of hitch point to barycenter, and for symmetric fork, barycenter is positioned at geometric center, and h is a known quantity; Then fork is fixed, continued swing, measure its cycle, the cycle of this moment and the elasticity coefficient of moment of inertia and torsionspring satisfy T
2=2*Pi* (I/ (mgh+K))
1/2, T wherein
2Be hunting period, K is the elasticity coefficient of torsionspring; Rock level at last, regulate base horizontal adjustment screw and make the fork level, swing fork then, measure hunting period, this moment, the elasticity coefficient of hunting period and spring satisfied T
3=2*Pi* (I/K)
1/2Known h, the measuring oscillating bar quality measures cycle T
1, T
2, T
3With three variable I, g, K, simultaneous solution obtains gravity acceleration g.
The invention has the beneficial effects as follows: instrument is changed fewer; Regulate simple; Physical pendulum is measured acceleration of gravity relatively, measures fast; Rock relatively, its function obtains expanding; Effective connection is rocked and physical pendulum, improves the fusion of knowledge, helps expanding student's the visual field, improves the understanding of student to knowledge.
Description of drawings
Fig. 1 be can measure acceleration of gravity rock the appearance synoptic diagram.
Wherein, 1, base, 2, the horizontal adjustment screw, 3, torsionspring, 4, gib screw, 5, fork.
Embodiment
Regulate the horizontal adjustment screw of base 1, make fork 5 vertical, this moment, fork became a physical pendulum, measured the rotation period T of physical pendulum
1Then that fork is fixing through gib screw 4, fork is measured the rotation period T of this moment at the acting in conjunction lower swing of gravity and torsionspring 3
2To rock the placement level at last, fork is measured rotation period T at the effect lower swing of torsionspring
3The quality of measuring oscillating bar with read the distance of suppending hole to barycenter, just can calculate the locality acceleration of gravity.
Claims (1)
1. the moment of inertia testing apparatus of a kind of energy measurement acceleration of gravity of the present invention rocks tester, fork, one-period tester and a balance by one and forms; It is characterized in that: rocking tester has two orthogonal bases, and each base respectively has three horizontal adjustment screws; Fork is a symmetrical uniformly fork of the material that can fix that suppending hole is arranged, and a millimeter rule is arranged on the fork; The period measuring appearance is measured hunting period, the quality of balance measurement fork.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210107237.0A CN102637377B (en) | 2012-04-13 | 2012-04-13 | Rotational inertia tester capable of measuring gravity acceleration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210107237.0A CN102637377B (en) | 2012-04-13 | 2012-04-13 | Rotational inertia tester capable of measuring gravity acceleration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102637377A true CN102637377A (en) | 2012-08-15 |
| CN102637377B CN102637377B (en) | 2014-02-19 |
Family
ID=46621756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210107237.0A Expired - Fee Related CN102637377B (en) | 2012-04-13 | 2012-04-13 | Rotational inertia tester capable of measuring gravity acceleration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102637377B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971570A (en) * | 2014-05-04 | 2014-08-06 | 四川大学 | Method for measuring gravitational acceleration by increasing pendulum length of compound pendulum through water injection |
| CN103971569A (en) * | 2014-05-04 | 2014-08-06 | 四川大学 | Method for measuring gravitational acceleration by pressurizing and increasing pendulum length of compound pendulum |
| CN103985290A (en) * | 2014-05-04 | 2014-08-13 | 四川大学 | Method for measuring gravity acceleration by sleeving cylinder to increase compound pendulum length |
| CN112885203A (en) * | 2021-03-01 | 2021-06-01 | 河南大学 | Novel gravitational acceleration measuring device based on rotational inertia |
Citations (5)
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| CN2190812Y (en) * | 1993-07-12 | 1995-03-01 | 刘璞 | Multipurpose rigid-body rotation experiment instrument |
| CN2359763Y (en) * | 1999-03-01 | 2000-01-19 | 中国地质大学（武汉） | Double-suspension torsional pendulum device |
| CN1945660A (en) * | 2006-11-01 | 2007-04-11 | 四川大学 | Twistless compound pendulum rod |
| CN1945658A (en) * | 2006-11-01 | 2007-04-11 | 四川大学 | Composite twistless compound pendulus rod |
| CN1945659A (en) * | 2006-11-01 | 2007-04-11 | 四川大学 | Combined twistless compound pendulum |
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2012
- 2012-04-13 CN CN201210107237.0A patent/CN102637377B/en not_active Expired - Fee Related
Patent Citations (5)
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|---|---|---|---|---|
| CN2190812Y (en) * | 1993-07-12 | 1995-03-01 | 刘璞 | Multipurpose rigid-body rotation experiment instrument |
| CN2359763Y (en) * | 1999-03-01 | 2000-01-19 | 中国地质大学（武汉） | Double-suspension torsional pendulum device |
| CN1945660A (en) * | 2006-11-01 | 2007-04-11 | 四川大学 | Twistless compound pendulum rod |
| CN1945658A (en) * | 2006-11-01 | 2007-04-11 | 四川大学 | Composite twistless compound pendulus rod |
| CN1945659A (en) * | 2006-11-01 | 2007-04-11 | 四川大学 | Combined twistless compound pendulum |
Non-Patent Citations (8)
| Title |
|---|
| 《西安邮电学院学报》 20040731 徐军华 刚体转动惯量的一种新型测量法--复摆法 第92-94页 1 第9卷, 第3期 * |
| 丁红伟 等: "关于传统扭摆法测物体转动惯量实验的改进", 《大学物理实验》 * |
| 孟泉水 等: "用复摆法测量刚体的转动惯量", 《西安科技学院学报》 * |
| 张继元: "利用双游标式复摆测定重力加速度g", 《大学物理实验》 * |
| 徐军华: "刚体转动惯量的一种新型测量法——复摆法", 《西安邮电学院学报》 * |
| 杜方炳: "重力加速度测量仪的设计与制作", 《物理实验》 * |
| 章子旭: "另一种用物理摆测重力加速度的方法", 《大学物理实验》 * |
| 袁昌盛 等: "改进复摆法测量转动惯量的方法和设备研究", 《中国机械工程》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971570A (en) * | 2014-05-04 | 2014-08-06 | 四川大学 | Method for measuring gravitational acceleration by increasing pendulum length of compound pendulum through water injection |
| CN103971569A (en) * | 2014-05-04 | 2014-08-06 | 四川大学 | Method for measuring gravitational acceleration by pressurizing and increasing pendulum length of compound pendulum |
| CN103985290A (en) * | 2014-05-04 | 2014-08-13 | 四川大学 | Method for measuring gravity acceleration by sleeving cylinder to increase compound pendulum length |
| CN103971569B (en) * | 2014-05-04 | 2016-03-02 | 四川大学 | Pressure extending physical pendulum pendulum length measures acceleration of gravity |
| CN103971570B (en) * | 2014-05-04 | 2016-05-18 | 四川大学 | Water filling extends physical pendulum pendulum length and measures acceleration of gravity |
| CN112885203A (en) * | 2021-03-01 | 2021-06-01 | 河南大学 | Novel gravitational acceleration measuring device based on rotational inertia |
| CN112885203B (en) * | 2021-03-01 | 2022-04-22 | 河南大学 | Gravity acceleration measuring device based on rotational inertia |
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| Publication number | Publication date |
|---|---|
| CN102637377B (en) | 2014-02-19 |
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