CN202003547U - Coriolis force demonstration instrument - Google Patents

Coriolis force demonstration instrument Download PDF

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Publication number
CN202003547U
CN202003547U CN2010206470648U CN201020647064U CN202003547U CN 202003547 U CN202003547 U CN 202003547U CN 2010206470648 U CN2010206470648 U CN 2010206470648U CN 201020647064 U CN201020647064 U CN 201020647064U CN 202003547 U CN202003547 U CN 202003547U
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CN
China
Prior art keywords
coriolis force
pendulum
demonstration
base plate
column
Prior art date
Application number
CN2010206470648U
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Chinese (zh)
Inventor
吕景林
Original Assignee
复旦大学
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Priority to CN2010206470648U priority Critical patent/CN202003547U/en
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Publication of CN202003547U publication Critical patent/CN202003547U/en

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Abstract

The utility model belongs to the teaching demonstration experimental equipment technology field, concretely relates to a coriolis force demonstration instrument. The coriolis force demonstration instrument of the utility model is composed of a power part and a demonstration part, the power part is an adjustable speed motor on which a rod is extended out, and the power part can drive the device to run; and the demonstration part is a single pendulum fixed on a bracket, the bracket is driven by the motor to rotate, and the simple pendulum can swing as run with the bracket. The utility model provides a device convenient to carry and operate and capable of demonstrating the existence and relative factors of the coriolis force to the students quickly in the classroom; by using the device, the coriolis force can be demonstrated clearly within a few seconds, which is much better than other demonstration methods.

Description

The Coriolis force demonstrator
Technical field
The utility model belongs to teaching demonstration experimental facilities technical field, is specifically related to a kind of Coriolis force demonstrator.
Background technology
Be subjected to an acting force during object noninertial system motion in relative rotation, this power is called Coriolis force, and it is the reason of a lot of geographical phenomenons, mechanics phenomenon.As the formation of trade wind, on the Northern Hemisphere, phenomenon such as the river river that flows along warp of the Southern Hemisphere is to the degradation degree difference of two sides, and the falling bodies track is by east, so the effect of Coriolis force is seen everywhere.But because this theory is very abstract, the student is beyond affordability, always is a difficult point in the classroom instruction.What first historically proof Coriolis force existed is famous foucault pendulum experiment, but this device volume is huge and will obtain experimental result and will wait for a long time, is not suitable for doing on theoretical classroom.It as a pendulum length 1 meter Foucault pendulum, swung one hour, the deflection of swinging plane is just more than 7 °, instrument heaviness, phenomenon are slow, and because parameter is non-adjustable, can only see the result of this noninertial system effect of the earth, demonstrate the existence of Coriolis force how fast, intuitively, and light and handy, the portable band of instrument is puzzlement Physical Education Teacher's a problem always.
Summary of the invention
The purpose of this utility model is to provide a kind of volume little, easy to carry, simple to operate, can promptly demonstrate the existence of Coriolis force and the device of correlative factor to the student on the classroom.
The utility model is from the design of the definition of Coriolis force.The computing formula of coriolis force is:
Wherein Be the speed of the relative noninertial system motion of object, Be the noninertial system rotational angular, the size of visible coriolis force is directly proportional with the movement velocity of reference system rotational angular, the relative moving system of object.
The Coriolis force demonstration apparatus that the utility model proposes, be to rotate by stationary installation of driven by motor, form the noninertial system of a rotation, and rotating speed is adjustable, single pendulum is housed on stationary installation, single pendulum can rotate with stationary installation, and self swings simultaneously, and single pendulum relative fixed device at the volley has a speed of related movement , this speed can change by regulating pendulum length, so this device not only can illustrate tellurian coriolis force phenomenon, and also can be from the existence and the correlative factor of more general aspect explanation Coriolis force.
This device is top-down to be divided into demonstration part and power part in two sub-sections.
Demonstration part: form by support 1, single pendulum 2 and terrestrial globe 3.Support 1 is made up of base plate 4, column 5 and top board 6; Column 5 is installed between base plate 4 and the top board 6, and is fixedly connected.Base plate 4 is designed to disc-shape, indicates scale above, i.e. scale of per 30 scale designations in the side of base plate is to show the deflection of swinging plane; For example use different colors to represent each scale, but so that also qualitative observation experimental result from afar.Be fixed with 2 ~ 3 root posts 5 above the base plate, the length of column 5 is no less than 60cm, and the upper end of column 5 links to each other with top board, and the top board shape is not limit.Single pendulum 2 is connected with top board 6.The single pendulum 2 that is made of cord and bead is fixed on the top board of support, and pendulum length is adjustable.
Power section: the power resources of the utility model device are dc micro-motors, the top of this motor is provided with motor shaft, this motor shaft is fixedlyed connected with an end of a major axis, and this major axis passes terrestrial globe 3, and the other end is connected with the center fixation of the base plate 4 of support.When electrical power rotates, will drive the rotation synchronous of support and simple pendulum device with it.By design circuit, can change the voltage of regulating above the motor, thereby change the rotating speed of whole device; The rotating speed difference, the speed difference of single pendulum swinging plane deflection.In addition, can be provided with one in the dead ahead of instrument and show the rotating speed display screen that rotates speed, can show rotating speed intuitively.
In the utility model, when entire bracket 1 was being driven rotation, single pendulum 2 also can have a speed of related movement by its device of relative fixed Must be subjected to the effect of coriolis force this moment in the swing ball motion, single pendulum is in the noninertial system of rotation, if make single pendulum 2 do swing again simultaneously, then swing ball is in the process of the pendulum while changeing, the swinging plane of the relative support 1 of swing ball can deflect, and the amplitude of this deflection can roughly be read by the base plate of support, and this is the result of coriolis force effect.By regulating the pendulum length of rotating speed of motor or adjusting single pendulum, can change the angle of swinging plane deflection in the unit interval.The terrestrial globe that install the below of base plate can be explanation, the various geographical phenomenons relevant with Coriolis force of analysis provide stage property.
The utility model is from the instrument of the definition of Coriolis force design, can make things convenient for the existence of demonstrating coriolis force intuitively, and deflection p.s. of device swinging plane can reach more than 7 °, and experimental result moment can get.Pass through to regulate instrument parameter simultaneously, the size of scalable coriolis force, thus tellurian coriolis force phenomenon not only can be described, also can be from the existence and the correlative factor of more general aspect explanation Coriolis force.
Description of drawings
Fig. 1 is the device synoptic diagram.
Number in the figure: 1 is support, and 2 is single pendulum, and 3 is terrestrial globe, and 4 is base plate, and 5 is column, and 6 is top board, and 7 is motor.
Embodiment
Form the demonstration part by support 1, single pendulum 2 and terrestrial globe 3.Support 1 adopts hard material, and it is made up of base plate 4, column 5 and top board 6; Column 5 is installed between base plate 4 and the top board 6, and is fixedly connected.Base plate 4 is designed to disc-shape, indicates scale above, and promptly per 30 degree are represented with a kind of color in the side of base plate, but so that also qualitative observation experimental result from afar.Be fixed with 2 ~ 3 root posts 5 above the base plate, the length of column 5 is no less than 60 centimeters, and the upper end of column 5 links to each other with top board.The top board shape is not limit, and is used for fixing single pendulum 2.The single pendulum 2 that is made of cord and bead is fixed on the top board of support, and pendulum length is adjustable.
A dc micro-motor is adopted in power section, above motor, is fixedlying connected a major axis with motor shaft, and this axle passes terrestrial globe, fixedlys connected with the base plate 4 of support, when electrical power rotates, will drive the rotation synchronous with it of support and simple pendulum device.By design circuit, can change the voltage that is added in above the motor, thereby regulate the rotating speed of whole device, rotating speed difference, the speed difference of single pendulum swinging plane deflection.In addition, there is one to show the window that rotates speed, can shows rotating speed intuitively in the design of the dead ahead of instrument.

Claims (6)

1. a Coriolis force demonstrator is characterized in that being made up of demonstration part and power section; Wherein,
The demonstration part is made up of support (1), single pendulum (2) and terrestrial globe (3); Support (1) is made up of base plate (4), column (5) and top board (6); Column (5) is installed between base plate (4) and the top board (6); Base plate (4) is designed to disc-shape, scale of per 30 scale designations in its side; Be fixed with many root posts (5) above the base plate (4), the upper end of column (5) links to each other with top board; Single pendulum (2) is connected with top board (6);
Power section is a dc micro-motor, is provided with motor shaft above this motor, and this motor shaft is fixedlyed connected with an end of a major axis, and this major axis passes terrestrial globe (3), and the other end is connected with the center fixation of the base plate (4) of support.
2. Coriolis force demonstrator as claimed in claim 1 is characterized in that described column (5) quantity is 2 ~ 3.
3. Coriolis force demonstrator as claimed in claim 1 is characterized in that described scale uses different colors to represent.
4. Coriolis force demonstrator as claimed in claim 1 is characterized in that described column (5) length is no less than 60cm.
5. Coriolis force demonstrator as claimed in claim 1 is characterized in that described single pendulum (2) pendulum length is adjustable.
6. Coriolis force demonstrator as claimed in claim 1 is characterized in that demonstrator is provided with the rotating speed display screen.
CN2010206470648U 2010-12-08 2010-12-08 Coriolis force demonstration instrument CN202003547U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206470648U CN202003547U (en) 2010-12-08 2010-12-08 Coriolis force demonstration instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206470648U CN202003547U (en) 2010-12-08 2010-12-08 Coriolis force demonstration instrument

Publications (1)

Publication Number Publication Date
CN202003547U true CN202003547U (en) 2011-10-05

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Application Number Title Priority Date Filing Date
CN2010206470648U CN202003547U (en) 2010-12-08 2010-12-08 Coriolis force demonstration instrument

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103021233A (en) * 2012-12-20 2013-04-03 天津大学 Turntable type Coriolis force experimental instrument
CN103933721A (en) * 2014-04-11 2014-07-23 浙江工业大学 Coriolis football device
CN103977550A (en) * 2014-04-11 2014-08-13 浙江工业大学 Coriolis football device
CN104835388A (en) * 2015-03-13 2015-08-12 长春工业大学 Coriolis acceleration demonstrating and computing device based on physical simulation form, and method thereof
CN109655187A (en) * 2019-01-04 2019-04-19 皖西学院 A kind of rotating disc type wireless control Coriolis force measurement experiment instrument

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103021233A (en) * 2012-12-20 2013-04-03 天津大学 Turntable type Coriolis force experimental instrument
CN103933721A (en) * 2014-04-11 2014-07-23 浙江工业大学 Coriolis football device
CN103977550A (en) * 2014-04-11 2014-08-13 浙江工业大学 Coriolis football device
CN103977550B (en) * 2014-04-11 2016-05-18 浙江工业大学 A kind of Coriolis football device
CN104835388A (en) * 2015-03-13 2015-08-12 长春工业大学 Coriolis acceleration demonstrating and computing device based on physical simulation form, and method thereof
CN109655187A (en) * 2019-01-04 2019-04-19 皖西学院 A kind of rotating disc type wireless control Coriolis force measurement experiment instrument

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111005

Termination date: 20131208

C17 Cessation of patent right