CN102236987A - Experimental device and method for demonstrating Doppler effect - Google Patents
Experimental device and method for demonstrating Doppler effect Download PDFInfo
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- CN102236987A CN102236987A CN2010101648460A CN201010164846A CN102236987A CN 102236987 A CN102236987 A CN 102236987A CN 2010101648460 A CN2010101648460 A CN 2010101648460A CN 201010164846 A CN201010164846 A CN 201010164846A CN 102236987 A CN102236987 A CN 102236987A
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- doppler effect
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- travelling car
- hand hammer
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Abstract
The invention discloses an experimental device for demonstrating a Doppler effect. The experimental device comprises a container for accommodating water; the experimental device also comprises a pair of guide rails arranged above the container and a moving component capable of moving horizontally on the guide rails, wherein the moving component comprises a moving trolley and a small hammer hung below the moving trolley; and the small hammer is in contact with the water surface. The invention also discloses a method for demonstrating the Doppler effect. The method comprises the following steps of: pressing a start button, driving the small hammer to move up and down through a driving motor, and striking the water surface at the same place by the small hammer so that the water wave diffuses to four sides in a concentric circle mode; and after the water surface is struck by the small hammer for a period of time, driving the small hammer to move horizontally on the guide rails by the driving motor, and striking the water surface by the small hammer, wherein the water wave around the small hammer produces density change so that the Doppler effect is demonstrated. According to the experimental device and method disclosed by the invention, the effect is intuitive.
Description
Technical field
The present invention relates to a kind of method of demonstrating the experimental provision and the demonstration Doppler effect thereof of Doppler effect.
Background technology
In daily life, people can have this experience: when one was listed as certain observer of train process of the steam whistle that ringing, he can find that the tone of train steam whistle is by high step-down.Why this phenomenon can take place? this is because the height of tone is that if the frequency height, it is just high that tone sounds by the difference decision of acoustic vibration frequency; It is just low that otherwise tone sounds.This phenomenon is called Doppler effect.Doppler effect (Doppler effect) was in honor of Austrian physicist and mathematician's Christian John Doppler (Christian JohannDoppler) and name, and he has at first proposed this theory in 1842.Doppler thinks that the wavelength of object radiation is because wave source and observer's caused by relative motion changes.As time goes on, Doppler effect has been widely applied to all trades and professions.
But owing to lack experimental tool, still actually a lot of people can not be real understand Doppler effect that how to form with figure Doppler effect.
Summary of the invention
The present invention is for a kind of method of demonstrating the experimental provision and the demonstration Doppler effect thereof of Doppler effect is provided.This experimental provision utilizes ripples that Doppler effect is carried out the performance of image, is this science reason how to form thereby make the participant get information about Doppler effect actually.
The technical scheme that the present invention takes is: the experimental provision of demonstration Doppler effect, be characterized in, and comprise a container, be filled with water in the container; Also be included in the pair of guide rails of container top setting and the moving-member that can move horizontally on this guide rail, described moving-member comprises a travelling car and is suspended on the hand hammer of this travelling car below; The described hand hammer contact water surface.
The experimental provision of above-mentioned demonstration Doppler effect, wherein, described travelling car comprises car body, described car body two bottom sides is provided with the pulley that can move in described guide rail.
The experimental provision of above-mentioned demonstration Doppler effect, wherein, the pulley both sides of described travelling car bottom are provided with down " U " type fastener, and " U " type fastener that should fall is stuck on the described guide rail.
The experimental provision of above-mentioned demonstration Doppler effect wherein, also comprises the straight line reducing motor that the described travelling car of driving moves and drives the up-down vibration reducing motor that hand hammer moves up and down.
The experimental provision of above-mentioned demonstration Doppler effect wherein, is connected by rigid posts between described travelling car and the hand hammer.
The experimental provision of above-mentioned demonstration Doppler effect, wherein, the starting point and the end point of described guide rail are equipped with limited block, and the position of the relative guide rail terminal of described travelling car limited block is provided with change-over switch, and the position of guide rail starting point is provided with the cut-out switch relatively; Described travelling car moves to the terminal of guide rail, collided by the end point limited block, the change-over switch action, and the drive motor antiport, travelling car retreats; Retreat into the starting point of guide rail, collided by the starting point limited block, cut off switch motion, travelling car stops to move.
The experimental provision of above-mentioned demonstration Doppler effect, wherein, described container is provided with water inlet and water delivering orifice.
The experimental provision of above-mentioned demonstration Doppler effect, wherein, the water surface in the described container is provided with the cushion that one deck cushions ripples.
Adopt the method for the experimental provision demonstration Doppler effect of demonstration Doppler effect, be characterized in, may further comprise the steps:
Step 1, a container is set, is filled with water in the container; Also be included in the pair of guide rails of container top setting and the moving-member that can move horizontally on this guide rail, described moving-member comprises a travelling car and is suspended on the hand hammer of this travelling car below; The described hand hammer contact water surface;
Step 2, press start button, drive motor drives hand hammer and moves up and down, and hand hammer impacts the water surface in same place, ripples become concentric circles to around diffusion;
Step 3, impact the water surface after a period of time when hand hammer, drive motor drives hand hammer and carry out tangential movement on guide rail, and the ripples generation density around the hand hammer paddling water surface, hand hammer changes, the demonstration Doppler effect;
The method of the experimental provision demonstration Doppler effect of above-mentioned employing demonstration Doppler effect, wherein, the starting point and the end point of described guide rail are equipped with limited block, the position of the relative guide rail terminal of described travelling car limited block is provided with change-over switch, and the position of guide rail starting point is provided with the cut-out switch relatively; Described travelling car moves to the terminal of guide rail, collided by the end point limited block, the change-over switch action, and the drive motor antiport, travelling car retreats; Retreat into the starting point of guide rail, collided by the starting point limited block, cut off switch motion, travelling car stops to move; This time demonstration finishes.
Because the present invention has adopted above technical scheme, makes a container, containing water in container, above container, install can tangential movement guide rail, installation can impact the travelling car of the band hand hammer of the water surface on the guide rail.When hand hammer moved horizontally on guide rail with travelling car, hand hammer impacted the water surface, can occur the density situation of ripples on the water surface, and the density situation of these ripples is the Doppler effect of demonstration.Effect is directly perceived.
Description of drawings
Concrete structure of the present invention is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the one-piece construction synoptic diagram of the present invention's experimental provision of demonstrating Doppler effect.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the side view of Fig. 1.
Fig. 4 is the structural representation that the present invention demonstrates moving-member in the experimental provision of Doppler effect, and wherein a is the vertical view of travelling car; B is the side view of travelling car.
Fig. 5 the present invention demonstrates the Doppler effect design sketch of the experimental provision demonstration of Doppler effect.
Embodiment
See also Fig. 1～Fig. 3, wherein Fig. 1 is the one-piece construction synoptic diagram of the present invention's experimental provision of demonstrating Doppler effect, and Fig. 2 is the vertical view of Fig. 1, and Fig. 3 is the side view of Fig. 1.The present invention demonstrates the experimental provision of Doppler effect, comprises a container 1, is filled with water 2 in the container; The present embodiment container adopts stainless steel to make, and utilizes supporting mechanism 3 to be fixed on the ground.At the pair of guide rails 4 that is provided with above the container and the moving-member 5 that can on this guide rail, move horizontally.Described container is provided with water inlet 11 and water delivering orifice 12, to change water quality timely, guarantees the cleaning of water in the container.The side of described container is provided with operator's console 6, and described operator's console is provided with function buttons 61 such as power switch, starting switch.
See also Fig. 4, Fig. 4 is the structural representation that the present invention demonstrates moving-member in the experimental provision of Doppler effect, and wherein a is a vertical view; B is side view (part is analysed and observe).Described moving-member 5 comprises a travelling car 51 and is suspended on the hand hammer 52 of this travelling car below; Be connected by rigid posts 53 between described travelling car and the hand hammer.The described hand hammer 52 contact waters surface.Described travelling car 51 comprises car body 511, and described car body two bottom sides is provided with the pulley 512 that can move in described guide rail.Security when guaranteeing that travelling car moves, the pulley both sides of described travelling car bottom are provided with down " U " type fastener 513, and " U " type fastener is stuck on the described guide rail.Travelling car of the present invention adopts drive motor 514 drivings to move around on guide rail, it is that 90 straight line reducing motor drives that present embodiment adopts reduction gear ratio for example, utilize this straight line reducing motor that the travelling car of advancing is controlled, can realize the stability demonstrated and the security of operation.Comprise that also driving hand hammer makes the up-down vibration reducing motor 515 of trace movement up and down.Thereby realization is moved in the linearity of horizontal guide rail moving up and down and driving travelling car of hand hammer.For safety, described travelling car is outer can be covered with cover cap 516.
Please cooperate and consult Fig. 2.The starting point of described guide rail 4 and end point are equipped with limited block 41,42, and the position of the relative guide rail terminal of described travelling car limited block is provided with change-over switch 518, and the position of guide rail starting point is provided with and cuts off switch 517 relatively; Described travelling car moves to the terminal of guide rail, collided by the end point limited block, the change-over switch action, and the drive motor antiport, travelling car retreats; Retreat into the starting point of guide rail, collided by the starting point limited block, cut off switch motion, travelling car stops to move.
Do not form tangible ripples in order to make in container, to strike waters, the present invention is provided with the cushion that one deck cushions ripples on the water surface, described cushion can be made of tiny simulation pasture and water, thereby make the motion of ripples not produce reflection wave, and then obtain better effect.
The present invention adopts the method for the experimental provision demonstration Doppler effect of demonstration Doppler effect, may further comprise the steps:
Step 1, a container is set, is filled with water in the container; Also be included in the pair of guide rails of container top setting and the moving-member that can move horizontally on this guide rail, described moving-member comprises a travelling car and is suspended on the hand hammer of this travelling car below; The described hand hammer contact water surface;
Step 2, press start button, drive motor drives hand hammer and moves up and down, and hand hammer impacts the water surface in same place, ripples become concentric circles to around diffusion;
Step 3, impact the water surface after a period of time when hand hammer, the internal conversion switch stops the up-down vibration reducing motor and drives hand hammer and move up and down, and the straight line reducing motor is started, and driving travelling car carries out tangential movement on guide rail; Hand hammer is the paddling water surface under the drive of travelling car, and the ripples generation density around the hand hammer changes, the demonstration Doppler effect;
Drive hand hammer the moving of the water surface by travelling car, we can see: the density situation (as shown in Figure 5) that can occur ripples on the water surface of hand hammer process: in the wave source front of motion, ripple is compressed, and it is shorter that wavelength becomes, and it is higher that frequency becomes.Wave source back in motion produces opposite effect.It is longer that wavelength becomes, and it is lower that frequency becomes.The speed of wave source is high more, and the effect that is produced is big more.Thereby demonstrated Doppler effect.
Claims (10)
1. the experimental provision of demonstration Doppler effect is characterized in that, comprises a container, is filled with water in the container; Also be included in the pair of guide rails of container top setting and the moving-member that can move horizontally on this guide rail, described moving-member comprises a travelling car and is suspended on the hand hammer of this travelling car below; The described hand hammer contact water surface.
2. the experimental provision of demonstration Doppler effect according to claim 1 is characterized in that, described travelling car comprises car body, and described car body two bottom sides is provided with the pulley that can move in described guide rail.
3. the experimental provision of demonstration Doppler effect according to claim 1 and 2 is characterized in that, the pulley both sides of described travelling car bottom are provided with down " U " type fastener, and " U " type fastener that should fall is stuck on the described guide rail.
4. the experimental provision of demonstration Doppler effect according to claim 1 and 2 is characterized in that, also comprises the straight line reducing motor that the described travelling car of driving moves and drives the up-down vibration reducing motor that hand hammer moves up and down.
5. the experimental provision of demonstration Doppler effect according to claim 1 and 2 is characterized in that, is connected by rigid posts between described travelling car and the hand hammer.
6. the experimental provision of demonstration Doppler effect according to claim 1, it is characterized in that, the starting point and the end point of described guide rail are equipped with limited block, and the position of the relative guide rail terminal of described travelling car limited block is provided with change-over switch, and the position of guide rail starting point is provided with the cut-out switch relatively; Described travelling car moves to the terminal of guide rail, collided by the end point limited block, the change-over switch action, and the drive motor antiport, travelling car retreats; Retreat into the starting point of guide rail, collided by the starting point limited block, cut off switch motion, travelling car stops to move.
7. the experimental provision of demonstration Doppler effect according to claim 1 is characterized in that, described container is provided with water inlet and water delivering orifice.
8. the experimental provision of demonstration Doppler effect according to claim 1 is characterized in that, the water surface is provided with the cushion that one deck cushions ripples in the described container.
9. adopt the method for the experimental provision demonstration Doppler effect of demonstration Doppler effect, it is characterized in that, may further comprise the steps:
Step 1, a container is set, is filled with water in the container; Also be included in the pair of guide rails of container top setting and the moving-member that can move horizontally on this guide rail, described moving-member comprises a travelling car and is suspended on the hand hammer of this travelling car below; The described hand hammer contact water surface;
Step 2, press start button, drive motor drives hand hammer and moves up and down, and hand hammer impacts the water surface in same place, ripples become concentric circles to around diffusion;
Step 3, impact the water surface after a period of time when hand hammer, drive motor drives hand hammer and carry out tangential movement on guide rail, and the ripples generation density around the hand hammer paddling water surface, hand hammer changes, the demonstration Doppler effect;
Step 4, the demonstration one back and forth after, stop the demonstration.
10. the method for the experimental provision demonstration Doppler effect of employing demonstration Doppler effect according to claim 9, it is characterized in that, the starting point and the end point of described guide rail are equipped with limited block, the position of the relative guide rail terminal of described travelling car limited block is provided with change-over switch, and the position of guide rail starting point is provided with the cut-out switch relatively; Described travelling car moves to the terminal of guide rail, collided by the end point limited block, the change-over switch action, and the drive motor antiport, travelling car retreats; Retreat into the starting point of guide rail, collided by the starting point limited block, cut off switch motion, travelling car stops to move; This time demonstration finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101648460A CN102236987A (en) | 2010-04-29 | 2010-04-29 | Experimental device and method for demonstrating Doppler effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101648460A CN102236987A (en) | 2010-04-29 | 2010-04-29 | Experimental device and method for demonstrating Doppler effect |
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| CN102236987A true CN102236987A (en) | 2011-11-09 |
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| CN2010101648460A Pending CN102236987A (en) | 2010-04-29 | 2010-04-29 | Experimental device and method for demonstrating Doppler effect |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102663930A (en) * | 2012-05-08 | 2012-09-12 | 刘杰 | Doppler Effect experimental device, system and method |
| CN103021255A (en) * | 2011-12-30 | 2013-04-03 | 上海德意达电子电器设备有限公司 | Simulation experiment device used for testing radar |
| CN104882050A (en) * | 2015-06-06 | 2015-09-02 | 谭永 | Principle for realizing visual Doppler effect |
| CN110956881A (en) * | 2019-12-19 | 2020-04-03 | 方凌花 | Novel teaching aid for displaying Doppler effect by utilizing water wave propagation |
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| CN1987958A (en) * | 2006-12-25 | 2007-06-27 | 浙江大学 | Comprehensive test device and method of Doppler effect |
| CN201673622U (en) * | 2010-04-29 | 2010-12-15 | 上海科技馆 | Doppler effect experiment demonstration device |
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| CN1987958A (en) * | 2006-12-25 | 2007-06-27 | 浙江大学 | Comprehensive test device and method of Doppler effect |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021255A (en) * | 2011-12-30 | 2013-04-03 | 上海德意达电子电器设备有限公司 | Simulation experiment device used for testing radar |
| CN103021255B (en) * | 2011-12-30 | 2014-10-29 | 上海德意达电子电器设备有限公司 | Simulation experiment device used for testing radar |
| CN102663930A (en) * | 2012-05-08 | 2012-09-12 | 刘杰 | Doppler Effect experimental device, system and method |
| CN102663930B (en) * | 2012-05-08 | 2014-02-26 | 刘杰 | Doppler Effect experimental device, system and method |
| CN104882050A (en) * | 2015-06-06 | 2015-09-02 | 谭永 | Principle for realizing visual Doppler effect |
| CN110956881A (en) * | 2019-12-19 | 2020-04-03 | 方凌花 | Novel teaching aid for displaying Doppler effect by utilizing water wave propagation |
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Application publication date: 20111109 |