CN201965816U - Multifunctional device for measuring rigid rotation inertia and demonstrating and proving conservation of angular momentum - Google Patents
Multifunctional device for measuring rigid rotation inertia and demonstrating and proving conservation of angular momentum Download PDFInfo
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- CN201965816U CN201965816U CN2011200704961U CN201120070496U CN201965816U CN 201965816 U CN201965816 U CN 201965816U CN 2011200704961 U CN2011200704961 U CN 2011200704961U CN 201120070496 U CN201120070496 U CN 201120070496U CN 201965816 U CN201965816 U CN 201965816U
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Abstract
The utility model discloses a measuring device, in particular to a multifunctional device for measuring rigid rotation inertia and demonstrating and proving conservation of angular momentum. The multifunctional device is structurally characterized in that an object carrying upper turntable and a lower turntable are installed on a vertical rotating shaft which is connected with a base, the rotatable object carrying upper turntable and the rotatable lower turntable are connected with each other through a torsion spring, an upper light screening sheet is installed on the lower surface of the object carrying upper turntable, and an upper photoelectric door which is used for measuring the passing time of the light screening sheet is installed at the upper end of an upper rotating arm which is connected with the rotating shaft and can rotate around the rotating shaft. The measuring device disclosed by the utility model has the advantages that the measuring speed is fast, the measuring period is short and the measurement repeatability is good; and since the used measuring method is a comparison method, the accuracy is high, an operational formula can be deduced easily, data can be processed easily, and the device is multipurpose.
Description
Technical field
The utility model relates to a kind of measurement mechanism, relates in particular to a kind of multi-functional solid moment of inertia measurement and angular momentum conservation demonstration, demo plant.
Background technology
Moment of inertia be to dead axle rotary rigid body rotator inertia size quantitatively, need consider it in a lot of fields such as the research of Machine Design manufacturing, article for rotation, the derivation of kinematical theory.Moment of inertia for some regular shape, the uniform dead axle rotary rigid body of mass distribution can use the method for Theoretical Calculation to try to achieve, but the moment of inertia of the dead axle rotary rigid body that distributes not according to certain rule for complex-shaped or quality just can only come actual measurement to draw by the method for testing." measurement of solid moment of inertia " experiment is important, as must a to do basic experiment in " Experiment of College Physics ".In the experiment, in order to verify the law of some rotation aspects preferably or obtain out perfectly measurement result have a good measurement mechanism to be very important, the measurement order of accuarcy of measurement mechanism has determined the success or failure of experiment.
Come the moment of inertia of dead axle rotary rigid body is measured for the method that adopts experiment, method commonly used at present mainly contains: three string pendulum mensurations, rock mensuration, Experiment of Moment of Inertia instrument measuring method etc.But can find when specifically implementing these mensurations, it is slower that their used surveying instrument ubiquity measuring speed, measuring period is long, the repeatability of measuring is not fine, accuracy is low, and their used measure equation is derived also loaded down with trivial details relatively, experiment condition satisfy bad grasp, and their performance also all is single.
The utility model content
In order to solve the problems of the technologies described above, the utility model provides the measurement of a kind of multi-functional rigidity rotation inertia and angular momentum conservation demonstration, demo plant, its measuring speed is fast, measuring period is short, the good reproducibility of measurement, and used measuring method is a relative method, the accuracy height, operational formula is easily derived, and data processing is easy, serves many purposes.
For reaching above-mentioned purpose, the utility model is achieved through the following technical solutions.
Measurement of multi-functional rigidity rotation inertia and angular momentum conservation demonstration, demo plant, its structure is as follows: the loading top rotary table is installed on the vertical rotation axis that links to each other with base with lower rotary table, connect by torsion spring between rotatable loading top rotary table and the lower rotary table, at loading top rotary table lower surface anti-dazzling screen is installed, is connected with rotation axis and can be equipped with and be used to measure the last photogate that anti-dazzling screen passes through the time around the last spiral arm upper end of rotation axis rotation.
The described spiral arm of going up is locked on the rotation axis by last locking screw.
The lock banking stop support is installed on the described base, and the lock banking stop support is provided with the last lock banking stop with loading top rotary table location matches, offers fore shaft on the loading top rotary table excircle, will go up the loading top rotary table through last lock banking stop and fore shaft and be locked on the lock banking stop support.
At described lower rotary table lower surface anti-dazzling screen down is installed, also can being equipped with around the lower rotatory arm upper end of rotation axis rotation of being connected with rotation axis is used to measure the following photogate of anti-dazzling screen by the time.
Described lower rotatory arm is locked on the rotation axis by following locking screw.
The lock banking stop support is installed on the described base, and the lock banking stop support is provided with the following lock banking stop with the lower rotary table location matches, offers fore shaft on the lower rotary table excircle, and lock banking stop and fore shaft are locked in lower rotary table on the lock banking stop support under the warp.
Advantage of the present utility model and effect:
The measuring speed of the utility model measurement mechanism is fast, and measuring period is short, the good reproducibility of measurement, and used measuring method is relative method, the accuracy height, and operational formula is easily derived, data processing is easy, serves many purposes.
Description of drawings
Fig. 1 is a main TV structure synoptic diagram of the present utility model.
Fig. 2 is a plan structure synoptic diagram of the present utility model.
Among the figure: 1, loading top rotary table; 2, lower rotary table; 3, rotation axis; 4, go up lock banking stop; 5, lock banking stop support; 6, go up photogate; 7, following photogate; 8, go up anti-dazzling screen; 9, following anti-dazzling screen; 10, go up spiral arm; 11, lower rotatory arm; 12, go up the locking screw; 13, base; 14, torsion spring; 15, fore shaft, 16, following locking screw, 17, lock banking stop down.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail, but protection domain of the present utility model is not limit by embodiment.
As depicted in figs. 1 and 2, the multi-functional rigidity rotation inertia of the utility model is measured and angular momentum conservation demonstration, demo plant, its structure is as follows: on loading top rotary table 1 and lower rotary table 2 is installed in base 13 links to each other the vertical rotation axis 3, connect by torsion spring 14 between rotatable loading top rotary table 1 and the lower rotary table 2, at loading top rotary table 1 lower surface anti-dazzling screen 8 is installed, also can being equipped with around last spiral arm 10 upper ends of rotation axis 3 rotations of being connected with rotation axis 3 is used to measure the last photogate 6 of anti-dazzling screen 8 by the time, at lower rotary table 2 lower surfaces anti-dazzling screen 9 down is installed, also can being equipped with around lower rotatory arm 11 upper ends of rotation axis 3 rotations of being connected with rotation axis 3 is used to measure the following photogate 7 of anti-dazzling screen 9 by the time.
Above-mentioned last spiral arm 10 can lock it on the rotation axis 3 by last locking screw 12.
Above-mentioned lower rotatory arm 11 can lock it on the rotation axis 3 by following locking screw 16.
On the above-mentioned base 13 lock banking stop support 5 is installed, lock banking stop support 5 is provided with the last lock banking stop 4 with loading top rotary table 1 location matches, offer fore shaft 15 on loading top rotary table 1 excircle, lock banking stop 4 and fore shaft 15 will be gone up loading top rotary table 1 and be locked on the lock banking stop support 5 in the utilization.
On the above-mentioned base 13 lock banking stop support 5 is installed, lock banking stop support 5 is provided with the following lock banking stop 17 with lower rotary table 2 location matches, offers fore shaft on lower rotary table 2 excircles, and lock banking stop 17 and fore shaft are locked in lower rotary table 2 on the lock banking stop support 5 under utilizing.
When utilizing the utility model device to implement to measure, adopt following method: lower rotary table 2 maintains static, rotate loading top rotary table 1, make loading top rotary table 1 turn over an angle, torsion spring is twisted simultaneously, and anti-dazzling screen utilizes locking plate and certain fore shaft through photogate in this process, with 1 locking of loading top rotary table, and carry out timing and prepare.Open loading top rotary table 1 then, make the effect turning down of loading top rotary table 1, measure anti-dazzling screen through the used time T of photogate at torsion spring
A, afterwards, the object that moment of inertia is to be measured is placed on the loading top rotary table 1, repeats above-mentioned measuring process, and anti-dazzling screen is through the used time T of photogate when measuring revolution
A1, utilize the known moment of inertia J of loading top rotary table 1
AWith measured T
AAnd T
A1Just can utilize the corresponding calculated formula to calculate the dead axle moment of inertia of object under test.
In addition, utilize the utility model device can also demonstrate the conservation of angular momentum.Method is: loading top rotary table 1 and lower rotary table 2 is free rotation state, utilizes both hands to twist loading top rotary table 1 and lower rotary table 2 respectively, and makes them turn over an angle in opposite directions to stop, and this moment, the angular momentum of system was zero.Decontrol both hands then simultaneously, allow loading top rotary table 1 and lower rotary table 2 turn round simultaneously, at this moment this system will no longer be subjected to the effect of moment of face.We can see that the direction of loading top rotary table 1 and lower rotary table 2 rotations is opposite all the time, stop simultaneously, revolution simultaneously again, so repeat endlessly, and that dial rotation speed that moment of inertia is big is less, the velocity of rotation of that rotating disk that moment of inertia is less is bigger, and the angular momentum of this phenomenon illustrative system remains constant (being zero).Conservation when the angular momentum sum of all right demo system of this device is non-vanishing.In addition, utilize checking rotation system that this device can also quantitative in the process that is not subjected to moment of face, the certain conservation of the angular momentum of system, it is to verify by calculating by the related data measured.
The principle of work of the utility model measurement mechanism is as follows:
A dead axle rotary rigid body and the dead axle rotary rigid body that moment of inertia is known that moment of inertia is to be measured,, compare their rotary states separately, the measurement of the line correlation of going forward side by side with imposing certain rotation condition.According to their difference of rotary state, utilize the result of measurement of correlation and the moment of inertia of known object again, obtain the moment of inertia of unknown article for rotation.
Claims (6)
1. multi-functional rigidity rotation inertia is measured and angular momentum conservation demonstration, demo plant, it is characterized in that structure is as follows: loading top rotary table (1) is installed on the vertical rotation axis (3) that links to each other with base (13) with lower rotary table (2), connect by torsion spring (14) between rotatable loading top rotary table (1) and the lower rotary table (2), at loading top rotary table (1) lower surface anti-dazzling screen (8) is installed, also can being equipped with around last spiral arm (10) upper end of rotation axis (3) rotation of being connected with rotation axis (3) is used to measure the last photogate (6) of anti-dazzling screen (8) by the time.
2. multi-functional rigidity rotation inertia according to claim 1 measurement and angular momentum conservation demonstration, demo plant is characterized in that the described spiral arm (10) of going up is locked on the rotation axis (3) by last locking screw (12).
3. multi-functional rigidity rotation inertia according to claim 1 measurement and angular momentum conservation demonstration, demo plant, it is characterized in that being equipped with on the described base (13) lock banking stop support (5), lock banking stop support (5) is provided with the last lock banking stop (4) with loading top rotary table (1) location matches, offer fore shaft (15) on loading top rotary table (1) excircle, will go up loading top rotary table (1) through last lock banking stop (4) and fore shaft (15) and be locked on the lock banking stop support (5).
4. multi-functional rigidity rotation inertia according to claim 1 measurement and angular momentum conservation demonstration, demo plant, it is characterized in that at described lower rotary table (2) lower surface anti-dazzling screen (9) down being installed, also can being equipped with around lower rotatory arm (11) upper end of rotation axis (3) rotation of being connected with rotation axis (3) is used to measure the following photogate (7) of anti-dazzling screen (9) by the time.
5. multi-functional rigidity rotation inertia according to claim 4 measurement and angular momentum conservation demonstration, demo plant is characterized in that described lower rotatory arm (11) is locked on the rotation axis (3) by following locking screw (16).
6. according to claim 1 described multi-functional rigidity rotation inertia measurement and angular momentum conservation demonstration, demo plant, it is characterized in that being equipped with on the described base (13) lock banking stop support (5), lock banking stop support (5) is provided with the following lock banking stop (17) with lower rotary table (2) location matches, offer fore shaft on lower rotary table (2) excircle, lock banking stop (17) and fore shaft are locked in lower rotary table (2) on the lock banking stop support (5) under the warp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200704961U CN201965816U (en) | 2011-03-17 | 2011-03-17 | Multifunctional device for measuring rigid rotation inertia and demonstrating and proving conservation of angular momentum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200704961U CN201965816U (en) | 2011-03-17 | 2011-03-17 | Multifunctional device for measuring rigid rotation inertia and demonstrating and proving conservation of angular momentum |
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| CN201965816U true CN201965816U (en) | 2011-09-07 |
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| CN2011200704961U Expired - Fee Related CN201965816U (en) | 2011-03-17 | 2011-03-17 | Multifunctional device for measuring rigid rotation inertia and demonstrating and proving conservation of angular momentum |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445304A (en) * | 2011-09-21 | 2012-05-09 | 华北电力大学（保定） | Device for measuring solid moment of inertia |
| CN102938226A (en) * | 2012-11-27 | 2013-02-20 | 上海师范大学 | Comprehensive demonstration instrument for demonstrating angular momentum conservation and rotational inertia and demonstrating method thereof |
| CN103234700A (en) * | 2013-04-12 | 2013-08-07 | 沈阳建筑大学 | Method for quickly measuring rotational inertia of measured object |
| CN103946911A (en) * | 2011-09-28 | 2014-07-23 | 惠普发展公司，有限责任合伙企业 | Slidable display housing |
| CN104123865A (en) * | 2014-07-02 | 2014-10-29 | 齐齐哈尔大学 | Rotational inertia measuring and demonstrative experiment device |
| CN104269086A (en) * | 2014-09-16 | 2015-01-07 | 四川大学 | Torsional pendulum rotational inertia tester with angle scale |
| CN104318852A (en) * | 2014-11-14 | 2015-01-28 | 重庆理工大学 | Magnetic dynamic balancing machine |
| CN106979842A (en) * | 2017-05-01 | 2017-07-25 | 沈阳建筑大学 | Quick rotation inertia quality somascope |
| CN107014563A (en) * | 2017-04-28 | 2017-08-04 | 沈阳建筑大学 | Quick rotation inertia measuring instrument and its measuring method |
-
2011
- 2011-03-17 CN CN2011200704961U patent/CN201965816U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445304A (en) * | 2011-09-21 | 2012-05-09 | 华北电力大学（保定） | Device for measuring solid moment of inertia |
| CN103946911A (en) * | 2011-09-28 | 2014-07-23 | 惠普发展公司，有限责任合伙企业 | Slidable display housing |
| CN102938226A (en) * | 2012-11-27 | 2013-02-20 | 上海师范大学 | Comprehensive demonstration instrument for demonstrating angular momentum conservation and rotational inertia and demonstrating method thereof |
| CN103234700A (en) * | 2013-04-12 | 2013-08-07 | 沈阳建筑大学 | Method for quickly measuring rotational inertia of measured object |
| CN104123865A (en) * | 2014-07-02 | 2014-10-29 | 齐齐哈尔大学 | Rotational inertia measuring and demonstrative experiment device |
| CN104123865B (en) * | 2014-07-02 | 2016-05-18 | 齐齐哈尔大学 | A kind of rotation inerttia and demonstrating experiment device |
| CN104269086A (en) * | 2014-09-16 | 2015-01-07 | 四川大学 | Torsional pendulum rotational inertia tester with angle scale |
| CN104318852A (en) * | 2014-11-14 | 2015-01-28 | 重庆理工大学 | Magnetic dynamic balancing machine |
| CN107014563A (en) * | 2017-04-28 | 2017-08-04 | 沈阳建筑大学 | Quick rotation inertia measuring instrument and its measuring method |
| CN106979842A (en) * | 2017-05-01 | 2017-07-25 | 沈阳建筑大学 | Quick rotation inertia quality somascope |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20140317 |