CN106910396A - Ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT - Google Patents
Ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT Download PDFInfo
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- CN106910396A CN106910396A CN201710176214.8A CN201710176214A CN106910396A CN 106910396 A CN106910396 A CN 106910396A CN 201710176214 A CN201710176214 A CN 201710176214A CN 106910396 A CN106910396 A CN 106910396A
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- doppler effect
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
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Abstract
The invention discloses a kind of ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT, the demonstrator has a base（1）, base is provided with three mutually the tanks of connection, one of wave-making water bath（11）Horizontal positioned, is made with transparent material, and one end of wave-making water bath is provided with the slightly higher vertical water supply tank in position（15）The other end of horizontal tank is provided with the lower slightly undertaking tank in position, accept tank and be provided with water plug, water, three current intercommunications of tank are sent to water supply tank by pipeline, a colored stroboscopic light source is provided with above horizontal tank, the light illumination levels tank water surface, an electromagnetism simple harmonic oscillation instrument, its oscillator is contacted with the water surface, in reflective mirror of the lower section of horizontal tank base plate equipped with angle at 45 °, coordinate equipped with one block of vertical frosted glass as film viewing screen with reflective mirror.The present invention can very well demonstrate Doppler effect, allow observer to see ripples Doppler's fiber communication experiment demonstration instrument of continuous, stable, clearly Doppler effect experimental phenomena.
Description
Technical field
The present invention relates generally to a kind of physics facility, the ripples Doppler effect used by Doppler effect is particularly demonstrated
Answer demonstrator experimental provision.
Background technology
In physics facility, especially in Doppler effect experimental provision, to be often related to demonstrate Doppler effect.
It is known that Doppler effect is for we live in a kind of common physical phenomenon, when train near we when blast of whistle become
Obtain sharply, and blast of whistle becomes overcast when train is away from us.This theory is that Doppler proposed first in 1842
Come, he points out, the wavelength of object radiation changes because of the relative motion of wave source and observer.As wave source and observer
When close to each other, wavelength is shortened, and frequency is uprised, that is, blue-shifted phenomenon occurs;When wave source and observer are located remotely from each other, phase is produced
Anti- effect, wavelength is elongated, and frequencies go lower occurs red shift.Wave source Doppler higher with observer's relative velocity, produced
Effect is bigger.It is red according to ripple（It is blue）The degree of shifting, can calculate the speed that wave source follows observed direction motion, the vapour in life
Car tachymeter is to be made according to this principle, and Big Bang Theory is also theoretical for starting point according to this.It is many
General Le effect has in everyways such as scientific research, engineering technology, traffic administration, medical diagnosis, weather forecasts widely should
With, thus Doppler effect whether Middle School Physics or College Physics fluctuation teaching be all important physical knowledge.
But in actually fluctuation teaching process, the limit of classroom condition is often limited by whenever Doppler effect is explained
System, because without the laboratory apparatus for demonstrating Doppler effect well, explanation can only be talked about stratagems on paper, and student is also only capable of from public affairs
Formula goes to understand the principle of Doppler effect.Speed of related movement between mainly object of tracing it to its cause is too small, and Doppler effect is failed to understand
It is aobvious.
Existing ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT is more, but these DOPPLER EFFECT DEMONSTRATION INSTRUMENTs all more or less have one
A little shortcomings.Such as in senior middle school《Physics》There is an important content in second (required plus take as an elective course) chapter 10 " Doppler effect "：Wave source
Motion, observer is motionless, and such as wave source moves to S2 by S1, and the corrugated of wave source right becomes intensive, and wavelength shortens, the corrugated of left
Become sparse, wavelength is elongated, this teaching process is the emphasis and difficult point of fluctuation teaching.Typically multimedia is used during teachers' instruction
Flash demo aided education, has certain effect really from perceptual knowledge, if but how general truly demonstrate this with material object
Strangle effect phenomenon, then have a more positive meaning for student's correct understanding and the knowledge for grasping Doppler effect, Wenzhou the
Teacher Ruan of two senior middle schools is exactly the experiment dress for " demonstrating Doppler effect using wave-making water bath " according to this principle design
Put.Its design is that the whole box that will be equipped with vibration source is pulled down, and is fixed on motor-driven carrier, and it is saturating that one is fixed above tank
Bright track, the motor-driven carrier for installing is placed on the track above tank.This Doppler effect apparatus for demonstrating is used
When be first to pour into appropriate water in the sink, open power switch device, regulation is shaken the knob of frequency adjusting knob or cover blade,
Make wave source vibration number consistent with light source stroboscopic number of times, it is to remain static that now ripples obtain image on screen.Then
Dolly is allowed to move in orbit, equivalent to wave source in motion, you can see on screen and dredge the corrugated while close.This
Apparatus for demonstrating is simple to operate, and substantially, can be repeated several times is carried out phenomenon.But the disadvantage of this apparatus for demonstrating is inclined tank
Small, the distance of dolly motion in orbit is very short, and the time of observation is very short every time, and this apparatus for demonstrating has obvious water
The reflex of ripple.
The content of the invention
Can overcome known technology shortcoming it is an object of the invention to provide one kind, can very well demonstrate Doppler effect, allow sight
The person of examining can see ripples Doppler's fiber communication experiment demonstration instrument of continuous, stable, clearly Doppler effect experimental phenomena.
To achieve the above object, the technical scheme is that：A kind of ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT, the demonstrator
There is a base, base is provided with three tanks for having connection mutually, and one of wave-making water bath horizontal positioned uses transparent material
It is made, one end of wave-making water bath is provided with the slightly higher vertical water supply tank in position, and the other end of the wave-making water bath of horizontal positioned is provided with
The lower slightly undertaking tank in position, accepts tank and is provided with water plug, and water, three current of tank are sent to water supply tank by pipeline
Intercommunication, is provided with a colored stroboscopic light source, the light illumination levels tank water surface, an electromagnetism simple harmonic oscillation above wave-making water bath
Instrument, its oscillator is contacted with the water surface, in reflective mirror of the lower section of horizontal tank base plate equipped with angle at 45 °, is coordinated with reflective mirror and is equipped with
One block of vertical frosted glass is used as film viewing screen.
Using such scheme, in the Doppler effect that horizontal tank is produced, can intuitively be seen very much by frosted glass film viewing screen
Observe, it is vivid, lively, realize the purpose of the present invention.
Scheme is described in more detail with reference to diagram and embodiment.
Brief description of the drawings
Fig. 1 is the front view of ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the top view of Fig. 1；
Fig. 4 is electromagnetism simple harmonic oscillation instrument electrical schematic diagram in Fig. 1.
Explanation is numbered in diagram：1st, base, 2, water pipe, 3, plane mirror, 4, simple harmonic oscillator, 5, vibrating reed, 6, stroboscopic
Light source supporting plate, 7, light source cover, 8, motor and shot-light fixed plate, 9, DC speed-regulating motor, 10, blanking disc, 11, wave-making water bath,
12nd, tank is accepted, 13, ground glass, 14, immersible pump, 15, effluent trough, 16, oscillator bead, 17, shot-light, 18, alternating electromagnetic
Iron, 19, full-wave rectifying circuit, 20, coil.
Specific embodiment
As shown in Figure 1 and Figure 2, described ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT has base 1, and the base is that riser support is drilled
Show the dependency structure of instrument, three tanks are installed on base, placed in the middle by the wave-making water bath 11 in horizontality, its left end is
The slightly higher effluent trough 15 in position, the tank right angle setting, right-hand member be return flume 12, tank built with immersible pump 14, by one
Root plastic conduit 2 is supplied water to effluent trough 15, and the height of three tanks is reduced successively, it is ensured that the current in wave-making water bath are from left to right
Flowing, in the presence of immersible pump, wave-making water bath forms continuously current, produces " hydrodynamic(al) " effect.In wave-making water bath 11
Top, be provided with a stroboscopic light source, supported by stroboscopic light source supporting plate 6, described stroboscopic light source color spot lamp 17 makees light
Source, being driven with DC speed-regulating motor 9 has two blanking discs of perforate 10 to rotate, and said apparatus are arranged in light source cover 7, and light is equal
It is distributed in evenly on the water surface of wave-making water bath 11.One electromagnetism simple harmonic oscillation instrument 4 is arranged on the outer wall of base 1, electromagnetism simple harmonic quantity
The oscillator bead of vibration gauge is arranged on wave-making water bath 11 close to the position of the water surface, so that its oscillator can contact the water surface.Wave-making water bath
Less, the area of the water surface is rectangular for the depth of 11 water, and the base plate lower space of groove is provided with a plane reflection installed by 45° angle
Mirror 3, one piece of vertical ground glass 13, the image on observer's observation ground glass are provided with face of the position of speculum.
Electromagnetism simple harmonic oscillation instrument, its vibration principle are as shown in figure 4, pay side output end to concatenate an iron core in transformer is in wedge
The alternating electromagnet 18 of type accesses a bridge rectifier 19 again, and the output end of rectification circuit accesses a coil 20, one
Silicon steel sheet oscillator is passed through from the middle of coil.The electromagnetism simple harmonic oscillation instrument principle of this structure is：
The AC power of 220V obtains the alternating current of 56V through transformer T transformations, alternating current through iron core in wedge type alternating electromagnetic
After iron 18, alternating magnetic field is produced in iron core is exchanged.The alternating current input whole circuit 19 of all-wave of 56V obtains the direct current of 15V, directly
After stream electricity enters coil 20, steady magnetic field, oscillator is produced to be made of silicon steel sheet in coil, silicon steel sheet oscillator is worn from the middle of coil
Cross, silicon steel sheet oscillator then produces magnetic after being subject to magnetic fields, this magnetic silicon steel sheet oscillator is from alternating electromagnet 18
When being passed through in the middle of wedge type iron core, oscillator iron is just made after the magnetic field interaction in magnetic silicon steel sheet oscillator and alternating electromagnet
Core up-down vibration, oscillator after vibration is got up once vibrating quite steadily without noise.
The principle of this experimental provision is：The water surface of wave-making water bath 11 forms continuously current and obtains " hydrodynamic(al) " effect,
And the oscillator of electromagnetism simple harmonic oscillator constantly touches the water surface, ripples are formed, the light of the stroboscopic light source that light source is formed is made with color spot lamp
Line is radiated on the water surface, and through the dianegative of shampoo groove 11, it is continuously clear, steady just to be observed on ground glass
Fixed, the obvious ripples Doppler effect image of effect, the present apparatus overcomes the shortcoming of known technology, and the installation cost of formation is low
Honest and clean, substantially, operation debugging is easy for effect.
Claims (3)
1. a kind of ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT, it is characterised in that：The demonstrator has a base（1）, base is provided with three
It is individual to have the tank of connection, one of wave-making water bath mutually（11）Horizontal positioned, is made with transparent material, and the one of wave-making water bath
End is provided with the slightly higher vertical water supply tank in position（15）, the other end of horizontal tank is provided with the lower slightly undertaking tank in position, accepts
Tank is provided with water plug, and water is sent to water supply tank by pipeline, and three current intercommunications of tank set above horizontal tank
There is a colored stroboscopic light source, the light illumination levels tank water surface, an electromagnetism simple harmonic oscillation instrument, its oscillator is contacted with the water surface,
Reflective mirror of the lower section of horizontal tank base plate equipped with angle at 45 °, coordinates equipped with one block of vertical frosted glass as sight with reflective mirror
Examine screen.
2. a kind of ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT according to claim 1, it is characterised in that：Stroboscopic light source is penetrated with colour
Lamp（17）Make light source, being driven with DC speed-regulating motor 9 there are two blanking discs of perforate（10）Rotation.
3. a kind of ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT according to claim 1, it is characterised in that：Described electromagnetism simple harmonic quantity shakes
Dynamic instrument pays side output end and concatenates alternating electromagnet of the iron core in wedge type in transformer（18）A bridge rectifier electricity is accessed again
Road（19）, output end one coil of access of rectification circuit（20）, a silicon steel sheet oscillator passed through in the middle of the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176214.8A CN106910396A (en) | 2017-03-23 | 2017-03-23 | Ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176214.8A CN106910396A (en) | 2017-03-23 | 2017-03-23 | Ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT |
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| Publication Number | Publication Date |
|---|---|
| CN106910396A true CN106910396A (en) | 2017-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710176214.8A Pending CN106910396A (en) | 2017-03-23 | 2017-03-23 | Ripples DOPPLER EFFECT DEMONSTRATION INSTRUMENT |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110956881A (en) * | 2019-12-19 | 2020-04-03 | 方凌花 | Novel teaching aid for displaying Doppler effect by utilizing water wave propagation |
Citations (6)
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|---|---|---|---|---|
| CN101025868A (en) * | 2004-04-14 | 2007-08-29 | 魏国 | Demonstrating instrument for water wave experiment |
| CN201673622U (en) * | 2010-04-29 | 2010-12-15 | 上海科技馆 | Doppler effect experiment demonstration device |
| CN102663930A (en) * | 2012-05-08 | 2012-09-12 | 刘杰 | Doppler Effect experimental device, system and method |
| CN202677675U (en) * | 2012-05-08 | 2013-01-16 | 刘杰 | Doppler effect experiment instrument, system |
| CN204010433U (en) * | 2014-06-12 | 2014-12-10 | 甘肃民族师范学院 | The ultrasonic Doppler effect experimental provision that tests the speed |
| CN104952327A (en) * | 2015-06-01 | 2015-09-30 | 南京新辉科教仪器有限公司 | Doppler effect comprehensive experiment instrument |
-
2017
- 2017-03-23 CN CN201710176214.8A patent/CN106910396A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101025868A (en) * | 2004-04-14 | 2007-08-29 | 魏国 | Demonstrating instrument for water wave experiment |
| CN201673622U (en) * | 2010-04-29 | 2010-12-15 | 上海科技馆 | Doppler effect experiment demonstration device |
| CN102663930A (en) * | 2012-05-08 | 2012-09-12 | 刘杰 | Doppler Effect experimental device, system and method |
| CN202677675U (en) * | 2012-05-08 | 2013-01-16 | 刘杰 | Doppler effect experiment instrument, system |
| CN204010433U (en) * | 2014-06-12 | 2014-12-10 | 甘肃民族师范学院 | The ultrasonic Doppler effect experimental provision that tests the speed |
| CN104952327A (en) * | 2015-06-01 | 2015-09-30 | 南京新辉科教仪器有限公司 | Doppler effect comprehensive experiment instrument |
Non-Patent Citations (2)
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| 杨传绿: "创设实验进行多普勒效应教学的探究", 《读写算-素质教育论坛》 * |
| 梁佩莹，梁泽汇，李成龙，黄义清，曹辉: "基于多普勒效应的水波特性实验装置的设计", 《大学物理》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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: 20170630 |
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