CN103162904A - Three-line pendulum - Google Patents
Three-line pendulum Download PDFInfo
- Publication number
- CN103162904A CN103162904A CN2013100876406A CN201310087640A CN103162904A CN 103162904 A CN103162904 A CN 103162904A CN 2013100876406 A CN2013100876406 A CN 2013100876406A CN 201310087640 A CN201310087640 A CN 201310087640A CN 103162904 A CN103162904 A CN 103162904A
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- China
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- disk
- center
- lower disc
- level meter
- line
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Abstract
The invention discloses a three-line pendulum which comprises a base, a telescopic vertical rod, a horizontal cross rod, an upper disk, a suspension line, a lower disk and a laser device. A rotation shaft is arranged at the center of the upper disk and vertically fixed onto the horizontal cross rod, a group of concentric circles are arranged on the lower disk by taking the center of the lower disk as a circle center, the radiuses of the concentric circles are uniformly increased, and the laser device is vertically fixed onto the center of the lower surface of the upper disk and is a dotted laser device or cross laser device. The three-line pendulum is simple in structure, practical, convenient and novel in structure, adjustment of the three-line pendulum before measurement is greatly facilitated, the three-line pendulum can be ensured to twist at a fixed axis, and measuring accuracy is improved.
Description
Technical field
The present invention relates to a kind of Experiments of Machanics device, be specially a kind of three-line pendulum.
Background technology
Three-line pendulum is the Experiments of Machanics instrument commonly used of Measuring Moment of Inertia Using, generally formed by support, upper disk, lower disc, suspension wire, wherein lower disc is used for placing rigid body to be measured, and utilize to place the moment of inertia that rigid body is calculated in the variation of rotation period before and after rigid body.During experiment, often improper because of the suspension wire length adjustment, cause lower disc to tilt, rock rather than do the dead axle torsional movement.In addition, when placing rigid body on lower disc, be difficult to guarantee that rigid body and lower disc are coaxial.Above-mentioned reason easily causes moment of inertia and the actual value of the rigid body of surveying not to be inconsistent.
Summary of the invention
The object of the invention is to develop a kind of three-line pendulum that is conducive to the Measurement accuracy solid moment of inertia.
in order to solve the problems of the technologies described above, the present invention is by the following technical solutions: a kind of three-line pendulum, comprise base, vertically be fixed in the telescopic pole on base, be fixed in the horizontal cross bar of telescopic pole upper end, upper disk, suspension wire, lower disc, upper disc centre arranges a rotating shaft, rotating shaft is vertically fixed on horizontal cross bar, suspension wire totally three be used for to link disk and lower disc, on lower disc take disc centre as the center of circle, be provided with the concentric circles that one group of radius evenly increases, it is characterized in that: also comprise laser instrument, described laser instrument is fixed on the center of lower disk surface, the vertical upper downward Emission Lasers of lower disk surface, described laser instrument is point-like laser device or cross line laser.
Further technical scheme is: also comprise level meter, described level meter is embedded the disc centre at lower disc, and described level meter is circular level meter.
Laser instrument sends vertically downward laser rays and is radiated on lower disc, by adjusting suspension wire length change lower disc position, make laser rays accurately aim at the lower disc center, the level meter reveal competence, guarantee thus the lower disc level and can do take laser rays as axle the dead axle torsional movement simultaneously.
The invention has the beneficial effects as follows: the adjusting before greatly facilitating three-line pendulum to measure, overcome the drawback of regulating three-line pendulum only according to the range estimation judgement, be conducive to guarantee that three-line pendulum does the dead axle torsional movement, improve the accuracy of measuring.The present invention is simple in structure, and is practical and convenient, and structure is novel, is conducive to the moment of inertia of Accurate Determining rigid body.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is schematic perspective view of the present invention.
In figure: 1. base, 2. telescopic pole, 3. horizontal cross bar, 4. go up disk, 5. suspension wire, 6. lower disc, 7. disc centre, 8. concentric circles, 9. laser instrument, 10. laser rays, 11. level meters, 12. leveling knobs, 13 rotating shafts.
Embodiment
as shown in Figure 1, the present invention includes base 1, vertically be fixed in the telescopic pole 2 on base 1, be fixed in the horizontal cross bar 3 of telescopic pole 2 upper ends, upper disk 4, suspension wire 5, lower disc 6, upper disk 4 centers arrange rotating shaft 13, rotating shaft 13 is vertically fixed on horizontal cross bar 3, suspension wire 5 totally three be used for to link disk 4 and lower disc 6, on lower disc 6 take disc centre 7 as the center of circle, be provided with the concentric circles 8 that one group of radius evenly increases, laser instrument 9 is fixed on the lower surface center of disk 4, the downward Emission Lasers of lower surface of vertical upper disk 4, laser instrument 9 is point-like laser device or cross line laser.
Level meter 11 is embedded the disc centre 7 at lower disc 6, and level meter 11 is circular level meter.
Base 1 below is provided with leveling knob 12, is used for adjusting base 1 level.
Laser instrument 9 sends vertically downward laser rays and is radiated on lower disc 6, regulates the length of suspension wire 5, makes laser rays accurately aim at lower disc center 7, level meter 11 reveal competences simultaneously.Concentric circles 9 on lower disc 6 places the position of rigid body as reference line, can begin experiment measuring.
Claims (2)
1. three-line pendulum, comprise bracket base (1), vertically be fixed in the telescopic pole (2) on base (1), be fixed in the horizontal cross bar (3) of telescopic pole (2) upper end, upper disk (4), suspension wire (5), lower disc (6), upper disk (4) center arranges rotating shaft (13), rotating shaft (13) is vertically fixed on horizontal cross bar (3), suspension wire (5) totally three be used for to link disk (4) and lower disc (6), lower disc (6) is upper take disc centre (7) as the center of circle, be provided with the concentric circles (8) that one group of radius evenly increases, it is characterized in that: also comprise laser instrument (9), laser instrument (9) is fixed on the lower surface center of disk (4), the downward Emission Lasers of lower surface of vertical upper disk (4), laser instrument (9) is point-like laser device or cross line laser.
2. a kind of three-line pendulum according to claim 1, it is characterized in that: also comprise level meter (11), level meter (11) is embedded the disc centre (7) in lower disc (6), and level meter (11) is circular level meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100876406A CN103162904A (en) | 2013-03-19 | 2013-03-19 | Three-line pendulum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100876406A CN103162904A (en) | 2013-03-19 | 2013-03-19 | Three-line pendulum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103162904A true CN103162904A (en) | 2013-06-19 |
Family
ID=48586175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100876406A Pending CN103162904A (en) | 2013-03-19 | 2013-03-19 | Three-line pendulum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103162904A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106373463A (en) * | 2016-11-01 | 2017-02-01 | 江南大学 | Experiment instrument for three-line pendulum |
| CN106448362A (en) * | 2016-10-18 | 2017-02-22 | 江南大学 | Three-line pendulum facilitating control of pendulum angle |
| CN106644269A (en) * | 2017-03-01 | 2017-05-10 | 江南大学 | Three-line pendulum upper disc |
| CN107271105A (en) * | 2017-07-27 | 2017-10-20 | 潍坊学院 | It is a kind of to measure the three-line pendulum of eccentric object rotation inertia |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5450337A (en) * | 1993-02-16 | 1995-09-12 | Industrial Technology Research Institute | Two-dimension unbalance correction device |
| CN200996883Y (en) * | 2006-09-15 | 2007-12-26 | 比亚迪股份有限公司 | Rotary inertia measuring device by triple-wire twisting method |
| CN201213044Y (en) * | 2008-07-03 | 2009-03-25 | 金宗营 | Single-pendulum resonance pendulum rack and single-pendulum resonance pendulum |
| CN202093708U (en) * | 2011-06-10 | 2011-12-28 | 内蒙古科技大学 | Three-line pendulum rotational inertia experimental instrument |
| KR101125056B1 (en) * | 2009-12-23 | 2012-03-21 | 재단법인 포항산업과학연구원 | Apparatus and method for measuring roll eccentricity in rolling roll |
| CN203203753U (en) * | 2013-03-19 | 2013-09-18 | 江南大学 | Rotation inertia determinator |
-
2013
- 2013-03-19 CN CN2013100876406A patent/CN103162904A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5450337A (en) * | 1993-02-16 | 1995-09-12 | Industrial Technology Research Institute | Two-dimension unbalance correction device |
| CN200996883Y (en) * | 2006-09-15 | 2007-12-26 | 比亚迪股份有限公司 | Rotary inertia measuring device by triple-wire twisting method |
| CN201213044Y (en) * | 2008-07-03 | 2009-03-25 | 金宗营 | Single-pendulum resonance pendulum rack and single-pendulum resonance pendulum |
| KR101125056B1 (en) * | 2009-12-23 | 2012-03-21 | 재단법인 포항산업과학연구원 | Apparatus and method for measuring roll eccentricity in rolling roll |
| CN202093708U (en) * | 2011-06-10 | 2011-12-28 | 内蒙古科技大学 | Three-line pendulum rotational inertia experimental instrument |
| CN203203753U (en) * | 2013-03-19 | 2013-09-18 | 江南大学 | Rotation inertia determinator |
Non-Patent Citations (1)
| Title |
|---|
| 单金德等: "改进三线摆试验仪", 《大学物理实验》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448362A (en) * | 2016-10-18 | 2017-02-22 | 江南大学 | Three-line pendulum facilitating control of pendulum angle |
| CN106373463A (en) * | 2016-11-01 | 2017-02-01 | 江南大学 | Experiment instrument for three-line pendulum |
| CN106644269A (en) * | 2017-03-01 | 2017-05-10 | 江南大学 | Three-line pendulum upper disc |
| CN107271105A (en) * | 2017-07-27 | 2017-10-20 | 潍坊学院 | It is a kind of to measure the three-line pendulum of eccentric object rotation inertia |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130619 |