CN108269472A - A kind of production method and device of the liquid standing wave ring of light - Google Patents
A kind of production method and device of the liquid standing wave ring of light Download PDFInfo
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- CN108269472A CN108269472A CN201810086763.0A CN201810086763A CN108269472A CN 108269472 A CN108269472 A CN 108269472A CN 201810086763 A CN201810086763 A CN 201810086763A CN 108269472 A CN108269472 A CN 108269472A
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Abstract
The present invention relates to a kind of production method and device of the liquid standing wave ring of light, the method includes：The junction of fluid column and tablet is the bottom of liquid standing wave；Laser emits laser to liquid standing wave, and liquid standing wave bottom is incident to from the one side of liquid standing wave；Laser reflexes to the another side of the different-waveband of liquid standing wave in liquid standing wave bottom；First part's laser occurs to reflect and generate the ring of light respectively in the another side of different-waveband, and second part laser reflexes to the one side of a upper wave band for place wave band in the another side of different-waveband respectively, and the refraction generation ring of light occurs in the one side of a upper wave band；The ring of light on liquid standing wave is observed by amplifier installation.The device can intuitively observe the generation process and principle of the liquid standing wave ring of light using the above method so that the wave crest and trough of liquid standing wave are more eye-catching intuitive, so as to preferably reflect propagation path of the laser on fluid column medium side.
Description
Technical field
The present invention relates to light propagation field more particularly to a kind of production methods and device of the liquid standing wave ring of light.
Background technology
The production method of the existing liquid standing wave ring of light, laser fluid column medium side propagation path and laser in liquid
The refraction of column medium side, reflection, total reflection phenomenon since liquid standing wave is the capillary ripple of very little, visually cannot be observed intuitively
The wave crest and trough of liquid standing wave, the ring of light generated on liquid standing wave also unobvious.
Invention content
The present invention provides a kind of production methods of the liquid standing wave ring of light, can intuitively observe the production of the liquid standing wave ring of light
Raw process and principle so that the wave crest and trough of liquid standing wave are more eye-catching intuitive, so as to preferably reflect laser in fluid column
Propagation path on medium side.
The present invention provides a kind of generation device of the liquid standing wave ring of light, while the device uses the above method, Ke Yizhi
The generation process and principle of the observation liquid standing wave ring of light of sight so that the wave crest and trough of liquid standing wave are more eye-catching intuitive, from
And preferably reflect propagation path of the laser on fluid column medium side.
In a first aspect, an embodiment of the present invention provides a kind of production method of the liquid standing wave ring of light, the method includes：
Inverted sink forms fluid column by the downward water pipe of nozzle at the uniform velocity flowing water to tablet, the nozzle to the flat plate section；It is described
The tablet wave upward to the fluid column is superimposed with the wave generation that the fluid column flows downward, and the nozzle to the flat plate section is formed
The junction of the liquid standing wave of multiple wave bands, the liquid standing wave and the tablet is the bottom of the liquid standing wave；Laser
Emit laser to the liquid standing wave, the liquid standing wave bottom is incident to from the one side of the liquid standing wave；The laser
The another side of the different-waveband of the liquid standing wave is reflexed in the liquid standing wave bottom；First part's laser difference
Occur to reflect in the another side of the different-waveband and generate the ring of light and second part laser respectively in the different-waveband
Another side reflex to where wave band a upper wave band one side, and the one side of a wave band is rolled on described
Penetrate the generation ring of light；The ring of light on the liquid standing wave is observed by amplifier installation.
Optionally, the method further includes：The Part III laser of the laser transmitting is in the liquid standing wave bottom
It is all-trans the another side center of the bottom wave band for being incident upon the liquid standing wave；The Part III laser is in the bottom wave band
Another side center is all-trans the one side center of the upper wave band for being incident upon the bottom wave band, until be all-trans be incident upon it is described
At nozzle, hot spot is generated at the nozzle；Hot spot is generated at the nozzle to further include：First part's laser is described
Liquid standing wave bottom reflexes at the nozzle and hot spot is generated at the nozzle.
Optionally, first part's laser occurs to reflect and generate the ring of light respectively in the another side of the different-waveband
Specifically further include：As the wave band that first part's laser is reflected in the another side of wave band is apart from the bottom wave
The height of section increases, and the incidence angle reflected increases, and refraction angle increases, and visual angle increases；The refraction angle θ 2=arcsin
(n1/n2) sin θ 1, wherein θ 1 are incidence of the first part's laser when the another side of the bottom wave band reflects
Angle, θ 2 are refraction angle of the first part's laser when the another side of the bottom wave band reflects, and n1 is liquid standing wave
Refractive index, n2 be air refractive index；(2 '-θ of θ 2) ＞ (1 '-θ of θ 1), wherein θ 1 ' are first part's laser in Gao Bo
The incidence angle when another side of section reflects, θ 2 ' are rolled over for first part's laser in the another side of high band
Refraction angle when penetrating.
Optionally, the tablet wave upward to the fluid column is superimposed specific packet with the wave generation that the fluid column flows downward
It includes：The first capillary ripple when the fluid column is propagated straight down, after adding in plate obstacle, the fluid column surface generates disturbance,
Generate the second capillary ripple fluctuated upwards；Second capillary ripple is superimposed with first capillary ripple generation propagated downwards, is produced
The raw liquid standing waves being made of multiple wave bands with stable node and wave crest；The downward flow velocity of the fluid column isWherein, U0 be the fluid column initial flow rate, U for the fluid column to
Under flow velocity, V is the wave disturbance flow velocity that reflects upwards of the fluid column, and H is distance of the fluid column apart from the nozzle, Water wave energy
Kr, r are fluid column radiuses, and ρ is the density of water, and f (kr) is constant；The downward flow velocity of the fluid column and the wave disturbance stream reflected upwards
Speed is identical, so as to generate the liquid standing wave.
Optionally, the wave where the second part laser reflexes to respectively in the another side of the different-waveband
After the one side of a upper wave band for section, the method further includes：The medium of a second part laser upward wave band layer by layer
It is reflected on face, occurs to reflect and generate the ring of light until in the one side of wave band or another side.
In second aspect, an embodiment of the present invention provides a kind of generation device of the liquid standing wave ring of light, described device includes：
Sink is used for, and the inverted sink passes through the downward water pipe of nozzle at the uniform velocity flowing water to tablet, the nozzle to the flat plate section
Form fluid column；The tablet is used for, and the tablet wave upward to the fluid column generates folded with the wave that the fluid column flows downward
Add, the nozzle to the flat plate section forms the liquid standing wave of multiple wave bands, the junction of the liquid standing wave and the tablet
Bottom for the liquid standing wave；Laser is used for, and transmitting laser is to the liquid standing wave, from the one side of the liquid standing wave
It is incident to the liquid standing wave bottom；The laser reflexes to the difference of the liquid standing wave in the liquid standing wave bottom
The another side of wave band；First part's laser occurs to reflect and generates the ring of light in the another side of the different-waveband respectively, with
And second part laser reflexes to the side of a upper wave band for place wave band in the another side of the different-waveband respectively
Face, and the refraction generation ring of light occurs for the one side of a wave band on described；Amplifier installation is used for, and is observed by amplifier installation
The ring of light on the liquid standing wave；One end of the water pipe is set in the sink, and the other end extends downwardly and the water pipe
Nozzle be located at the top of the tablet, the laser energy that the laser is located at the side of the tablet and the laser is sent out
The liquid standing wave is enough irradiated, one end of the amplifier installation is set to the tablet, and the other end upwardly extends.
Optionally, the laser is additionally operable to：The Part III laser of the laser transmitting is at the liquid standing wave bottom
Portion is all-trans the another side center of the bottom wave band for being incident upon the liquid standing wave；The Part III laser is in the bottom wave band
Another side center be all-trans the one side center of the upper wave band for being incident upon the bottom wave band, be incident upon institute until being all-trans
It states at nozzle, hot spot is generated at the nozzle；Hot spot is generated at the nozzle to further include：The laser emits described
First part's laser reflexes at the nozzle in the liquid standing wave bottom and hot spot is generated at the nozzle.
Optionally, described device further includes：It is reflected with first part's laser in the another side of wave band
Height of the wave band apart from the bottom wave band increases, and the incidence angle reflected increases, and refraction angle increases, and visual angle increases；Institute
Refraction angle θ 2=arcsin (n1/n2) sin θ 1 is stated, wherein θ 1 is first part's laser in the another side of the bottom wave band
Incidence angle when reflecting, θ 2 are refraction of the first part's laser when the another side of the bottom wave band reflects
Angle, n1 are the refractive index of liquid standing wave, and n2 is the refractive index of air；(2 '-θ of θ 2) ＞ (1 '-θ of θ 1), wherein θ 1 ' are described first
Incidence angle of the fraction of laser light when the another side of high band reflects, θ 2 ' are first part's laser in high band
Refraction angle when another side reflects.
Optionally, the tablet is specifically used for：The first capillary ripple when the fluid column is propagated straight down adds in tablet barrier
After hindering object, the fluid column surface generates disturbance, generates the second capillary ripple fluctuated upwards；Second capillary ripple is with propagating downwards
First capillary ripple generate superposition, generate the liquid being made of multiple wave bands with stable node and wave crest and stay
Wave；The downward flow velocity of the fluid column isWherein, U0 is the liquid
Column initial flow rate, U are the downward flow velocity of the fluid column, and V is the wave disturbance flow velocity that the fluid column reflects upwards, and H is fluid column distance
The distance of the nozzle, Water wave energy kr, r are fluid column radiuses, and ρ is the density of water, and f (kr) is constant；The fluid column is downward
Flow velocity is identical with the wave disturbance flow velocity reflected upwards, so as to generate the liquid standing wave.
Optionally, described device further includes：The second part laser occurs on the medium side of a upward wave band anti-layer by layer
It penetrates, occurs to reflect and generate the ring of light until in the one side of wave band or another side.
Therefore, the production method and device for a kind of liquid standing wave ring of light that the application provides, can intuitively observe liquid
The generation process and principle of the standing wave ring of light so that the wave crest and trough of liquid standing wave are more eye-catching intuitive, so as to preferably reflect
Go out propagation path of the laser on fluid column medium side.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings and also belong to protection scope of the present invention.
Fig. 1 is the flow chart of the production method of the liquid standing wave ring of light that the embodiment of the present invention one provides；
Fig. 2 is the generation device schematic diagram of the liquid standing wave ring of light provided by Embodiment 2 of the present invention；
Fig. 3 is the index path that the laser that the embodiment of the present invention one provides reflects on liquid standing wave medium side；
Fig. 4 is the liquid standing wave ring of light figure that the embodiment of the present invention one provides；
Fig. 5 is the index path that the laser that the embodiment of the present invention one provides is totally reflected on liquid standing wave medium side.
Icon：201- sinks；202- water pipes；203- tablets；204- lasers；205- amplifier installations；206-
Air inlet pipe.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be configured to arrange and design with a variety of different.Therefore, below to provide in the accompanying drawings the present invention reality
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
Embodiment one
The embodiment of the present invention one provides the production method of the liquid standing wave ring of light, is the embodiment of the present invention one as shown in Figure 1
The flow chart of the production method of the liquid standing wave ring of light of offer, Fig. 2 is the generation device schematic diagram of the liquid standing wave ring of light, with reference to figure
1 and Fig. 2, this method comprises the following steps：
Step 101, inverted sink 201 is by the downward at the uniform velocity flowing water of water pipe 202 of nozzle to tablet 203, and nozzle is to flat
203 sections of formation fluid columns of plate.
According to hydrostatic equilibrium law, before 201 liquid level of sink is down to the blow vent A of air inlet pipe 206, water pipe
The flow velocity of 202 nozzle B flowing water will be kept constant.
Liquid is flowed down from nozzle, is formed stable fluid column, is established coordinate system, using fluid column flows direction as Z-direction, nozzle
For Z=0 planes.If fluid flow is Q, speed U, atmospheric pressure P, fluid column radius r (z), nozzle radius a, surface tension σ,
A, B point that can be obtained in fluid column have：
1/2ρU02+ρgz+PA=1/2 ρ UZ 2+PB, density of the wherein ρ for water, fluid column A point pressure PA, fluid column B point pressure PB。
With the increasing of the height of drop Z apart from nozzle
Greatly, the downward flow velocity U of fluid columnZIncrease, fluid column section radius r (z) reduce.
Step 102, the wave upward to fluid column of tablet 203 is superimposed with the wave generation that fluid column flows downward, nozzle to tablet 203
The junction of the liquid standing wave of the multiple wave bands of section formation, liquid standing wave and tablet 203 is the bottom of liquid standing wave.
The first capillary ripple when fluid column is propagated straight down, after adding in 203 barrier of tablet, liquid surface generates disturbance,
The second capillary ripple for fluctuating upwards is generated, be superimposed with the first capillary ripple generation propagated downwards, generate has stabilization by multiple
The liquid standing wave of the wave band of node and wave crest composition.The contact point of junction is wave source, and a part of disturbance energy will be with standing wave shape
Formula is propagated along vertical fluid column surface, that is, is disturbed along stagnation surface and reflected upwards；Another part disturbance energy will be dissipated on horizontal liquid level,
It is propagated in the form of wave on surface.
The downward flow velocity of fluid column isWherein, U0 is at the beginning of fluid column
Beginning flow velocity, U are the downward flow velocity of fluid column, and V is the wave disturbance flow velocity that fluid column reflects upwards, H be fluid column apart from the nozzle away from
From Water wave energy kr, r are fluid column radiuses, and ρ is the density of water, and f (kr) is constant；It fluid column downward flow velocity and reflects upwards
Wave disturbance flow velocity is identical, therefore generates liquid standing wave.
The influence of flow and height to ripples kr：When flow Q is constant, ripples kr is with the increase of the distance H apart from nozzle
And increase, distance is bigger, and flow velocity is faster, and the energy of wave is bigger, and wavelength is shorter；Otherwise the energy of wave is smaller, and wavelength is bigger；When away from
When constant from H, flow Q is bigger, and ripples kr is bigger.So the fluid column close to nozzle is smooth fluid column, laser is situated between in smooth fluid column
Matter is totally reflected on face, is not reflected, and does not generate the ring of light.
Laminar condition down-off is bigger, and capillary ripples kr is bigger；Water standing wave cannot be generated under turbulence state.
The energy dissipation in standing wave deep water face is more, and reflected energy is small, and gross energy is smaller, and standing wave wavelength is big.
Standing wave junction pours that water surface energy dissipation is less, and reflected energy is big, and gross energy is larger, and standing wave wavelength is small.
Step 103, laser 204 emits laser to liquid standing wave, and liquid standing wave is incident to from the one side of liquid standing wave
Bottom.
After laser oblique incidence is to junction contact point, diffusing reflection is generated in junction, that is, liquid column bottom, reflective light intensity is most
Greatly.
The visual angle of laser oblique incidence is different, it can be seen that the ring of light number it is also different, ring of light brightness is also different.
Step 104, laser reflexes to the another side of the different-waveband of liquid standing wave in liquid standing wave bottom.
Fig. 3 is the index path that laser reflects on liquid standing wave medium side, as shown in figure 3, laser is in liquid standing wave
Bottom reflexes to the another side of the wave band apart from liquid column bottom different height.
Step 105, first part's laser occurs to reflect and generate the ring of light, Yi Ji respectively in the another side of different-waveband
The one side of a upper wave band for wave band where two fraction of laser light reflex to respectively in the another side of different-waveband, and upper
The one side of one wave band occurs refraction and generates the ring of light.
Fig. 4 is liquid standing wave ring of light figure, as shown in figure 4, laser is between fluid column and air dielectric face：Fraction of laser light is in portion
Subregion reflects, and subregion is totally reflected.Laser is easier that the refraction generation ring of light occurs in liquid standing wave node portion.
As shown in figure 3, with the increase of the distance apart from liquid column bottom, the incident angle reflected increases, refraction angle
Degree increase, visual angle increase.
N2sin θ 2=n1sin θ 1, can obtain output angle θ 2=arcsin (n1/n2) sin θ 1, and wherein θ 1 is described first
Incidence angle of the shunt excitation light when the another side of the bottom wave band reflects, θ 2 are first part's laser in the bottom wave
The refraction angle when another side of section reflects, n1 are the refractive index of liquid standing wave, and n2 is the refractive index of air.
(2 '-θ of θ 2) ＞ (1 '-θ of θ 1), wherein θ 1 ' are rolled over for first part's laser in the another side of high band
Incidence angle when penetrating, θ 2 ' are refraction angle of the first part's laser when the another side of high band reflects.
The liquid segment length of the wave band of height more eminence apart from liquid standing wave bottom is shorter.
The visual angle of laser oblique incidence is different, it can be seen that the ring of light number it is also different, ring of light brightness is also different.
Step 106, the ring of light on liquid standing wave is observed by amplifier installation 205.
Amplifier installation 205 can be the amplifier with display screen or the amplifier without display screen and show
Display screen connects, and amplifier installation 205 is placed on the side of liquid standing wave, is preferably rested in close to liquid column bottom so as to better
Observe the ring of light on liquid standing wave.
Optionally, the method further includes：Part III laser is all-trans in liquid standing wave bottom is incident upon liquid standing wave
Bottom wave band another side center；Part III laser is all-trans at the another side center of bottom wave band is incident upon bottom wave band
The one side center of a upper wave band, is incident upon until being all-trans at nozzle, and hot spot is generated at nozzle.
The index path that laser as shown in Figure 5 is totally reflected on liquid standing wave medium side, when laser oblique incidence to friendship
After connecing place's contact point, diffusing reflection is generated in junction, laser is between fluid column and air dielectric face：Reflected light is sent out in subregion
Raw refraction, subregion is totally reflected.Angle of total reflection sinc=1/1.33, c=48.7 °.
Hot spot is generated at nozzle：One kind is that first part's laser is reflexed in junction contact point at nozzle；Separately
A kind of is that Part III laser is all-trans in junction contact point and is incident upon the wave band of liquid standing wave, and pipe is incident upon until being all-trans
Hot spot is generated at mouthful.
Therefore, the production method for a kind of liquid standing wave ring of light that the application provides, can intuitively observe liquid standing wave light
The generation process and principle of ring so that the wave crest and trough of liquid standing wave are more eye-catching intuitive, so as to preferably reflect laser
Propagation path on fluid column medium side.
Embodiment two
The generation device for the liquid standing wave ring of light that embodiment two that the present invention will be described in detail by taking Fig. 2 as an example below provides, with
The production method of the liquid standing wave ring of light in embodiment one is corresponding, and Fig. 2 is liquid standing wave light provided by Embodiment 2 of the present invention
The generation device schematic diagram of ring, as shown in Fig. 2, the device includes：It sink 201, water pipe 202, tablet 203, laser 204 and puts
Big device device 205.
One end of the water pipe 202 is set in the sink 201, and the other end extends downwardly and the pipe of the water pipe 202
Mouth is located at the top of the tablet 203, and the laser 204 is located at the side of the tablet 203 and the laser 204 is sent out
Laser can irradiate the liquid standing wave, one end of the amplifier installation 205 is set to the tablet 203, the other end to
Upper extension.
Sink 201 is used for, the inverted sink 201 by the downward at the uniform velocity flowing water of water pipe 202 of nozzle to tablet 203,
The nozzle to 203 sections of the tablet forms fluid columns；
Tablet 203 is used for, and the tablet 203 wave upward to the fluid column generates folded with the wave that the fluid column flows downward
Add, the nozzle to described 203 sections of liquid standing waves for forming multiple wave bands of tablet, the liquid standing wave and the tablet 203
Junction is the bottom of the liquid standing wave；
Laser 204 is used for, transmitting laser to the liquid standing wave, is incident to from the one side of the liquid standing wave described
Liquid standing wave bottom；The laser reflexes to the another of the different-waveband of the liquid standing wave in the liquid standing wave bottom
Side；First part's laser occurs to reflect and generate the ring of light and second part respectively in the another side of the different-waveband
The one side of a upper wave band for wave band where laser reflexes to respectively in the another side of the different-waveband, and described
The one side of a upper wave band occurs refraction and generates the ring of light；
Amplifier installation 205 is used for, and the ring of light on the liquid standing wave is observed by amplifier installation 205.
Optionally, the laser 204 is additionally operable to：The Part III laser that the laser 204 emits is in the liquid
Standing wave bottom is all-trans the another side center of the bottom wave band for being incident upon the liquid standing wave；The Part III laser is described
The another side center of bottom wave band is all-trans the one side center of the upper wave band for being incident upon the bottom wave band, until being all-trans
It is incident upon at the nozzle, hot spot is generated at the nozzle；Hot spot is generated at the nozzle to further include：The laser 204
First part's laser of transmitting is reflexed at the nozzle in the liquid standing wave bottom and is produced at the nozzle
Third contact of a total solar or lunar eclipse spot.
Optionally, described device further includes：
As the wave band that first part's laser is reflected in the another side of wave band is apart from the bottom wave band
Height increase, the incidence angle that reflects increases, and refraction angle increases, and visual angle increases；The refraction angle θ 2=arcsin (n1/
N2) sin θ 1, wherein θ 1 be incidence angle of the first part's laser when the another side of the bottom wave band reflects, θ 2
For refraction angle of the first part's laser when the another side of the bottom wave band reflects, n1 is the refraction of liquid standing wave
Rate, n2 are the refractive index of air；(2 '-θ of θ 2) ＞ (1 '-θ of θ 1), wherein θ 1 ' are first part's laser in the another of high band
Incidence angle when one side reflects, θ 2 ' are first part's laser when the another side of high band reflects
Refraction angle.
Optionally, the tablet 203 is specifically used for：
The first capillary ripple when the fluid column is propagated straight down, after adding in 203 barrier of tablet, the fluid column surface production
Raw disturbance, generates the second capillary ripple fluctuated upwards；Second capillary ripple and first capillary ripple propagated downwards generate
Superposition is generated by multiple liquid standing waves that there is the node of stabilization and the wave band of wave crest to form；The downward stream of the fluid column
Speed isWherein, U0 is the fluid column initial flow rate, and U is the liquid
The downward flow velocity of column, V are the wave disturbance flow velocity that reflects upwards of the fluid column, and H is distance of the fluid column apart from the nozzle, water wave energy
Kr is measured, r is fluid column radius, and ρ is the density of water, and f (kr) is constant；The downward flow velocity of the fluid column and the wave disturbance reflected upwards
Flow velocity is identical, so as to generate the liquid standing wave；When fluid column flow Q is constant, ripples kr is with the distance H apart from the nozzle
Increase and increase, distance it is bigger, fluid column flow velocity is faster, and the energy of ripples is bigger, and wavelength is shorter；Otherwise the energy of ripples is got over
Small, wavelength is bigger；When the distance H is constant, fluid column flow Q is bigger, and ripples kr is bigger.
Optionally, described device further includes：The second part laser occurs on the medium side of a upward wave band anti-layer by layer
It penetrates, occurs to reflect and generate the ring of light until in the one side of wave band or another side.
Therefore, the generation device of a kind of liquid standing wave ring of light provided in an embodiment of the present invention, can intuitively observe liquid
The generation process and principle of the standing wave ring of light so that the wave crest and trough of liquid standing wave are more eye-catching intuitive, so as to preferably reflect
Go out propagation path of the laser on fluid column medium side.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of production method of the liquid standing wave ring of light, which is characterized in that the method includes：
Inverted sink forms fluid column by the downward water pipe of nozzle at the uniform velocity flowing water to tablet, the nozzle to the flat plate section；
The tablet wave upward to the fluid column is superimposed with the wave generation that the fluid column flows downward, and the nozzle is put down to described
Plate section forms the liquid standing wave of multiple wave bands, and the junction of the liquid standing wave and the tablet is the bottom of the liquid standing wave
Portion；
Laser emits laser to the liquid standing wave, and the liquid standing wave bottom is incident to from the one side of the liquid standing wave
Portion；
The laser reflexes to the another side of the different-waveband of the liquid standing wave in the liquid standing wave bottom；
First part's laser occurs to reflect and generates the ring of light and second part swashs in the another side of the different-waveband respectively
The one side of a upper wave band for wave band where light reflexes to respectively in the another side of the different-waveband, and on described
The one side of one wave band occurs refraction and generates the ring of light；
The ring of light on the liquid standing wave is observed by amplifier installation.
2. according to the method described in claim 1, it is characterized in that, the method further includes：
The Part III laser of the laser transmitting is all-trans in the liquid standing wave bottom is incident upon the liquid standing wave
The another side center of bottom wave band；
The Part III laser is all-trans at the another side center of the bottom wave band is incident upon a upper wave for the bottom wave band
The one side center of section, is incident upon until being all-trans at the nozzle, and hot spot is generated at the nozzle；
Hot spot is generated at the nozzle to further include：First part's laser reflexes to institute in the liquid standing wave bottom
It states at nozzle and hot spot is generated at the nozzle.
3. according to the method described in claim 1, it is characterized in that, first part's laser is respectively in the different-waveband
Another side occurs to reflect and generate the ring of light specifically to further include：
With height of the wave band that first part's laser is reflected in the another side of wave band apart from the bottom wave band
Degree increases, and the incidence angle reflected increases, and refraction angle increases, and visual angle increases；
Refraction angle θ 2=arcsin (n1/n2) sin θ 1, wherein θ 1 are first part's laser in the another of the bottom wave band
Incidence angle when one side reflects, when θ 2 is reflected for first part's laser in the another side of the bottom wave band
Refraction angle, n1 be liquid standing wave refractive index, n2 be air refractive index；
When (2 '-θ of θ 2) ＞ (1 '-θ of θ 1), wherein θ 1 ' are reflected for first part's laser in the another side of high band
Incidence angle, θ 2 ' be refraction angle of the first part's laser when the another side of high band reflects.
4. according to the method described in claim 1, it is characterized in that, the tablet wave upward to the fluid column and the fluid column
The wave to flow downward generates superposition and specifically includes：
The first capillary ripple when the fluid column is propagated straight down, after adding in plate obstacle, the fluid column surface generates disturbance,
Generate the second capillary ripple fluctuated upwards；
Second capillary ripple is superimposed with first capillary ripple generation propagated downwards, and generate has stable node by multiple
The liquid standing wave formed with the wave band of wave crest；
The downward flow velocity of the fluid column isWherein, U0 is the liquid
Column initial flow rate, U are the downward flow velocity of the fluid column, and V is the wave disturbance flow velocity that the fluid column reflects upwards, and H is fluid column distance
The distance of the nozzle, Water wave energy kr, r are fluid column radiuses, and ρ is the density of water, and f (kr) is constant；
The downward flow velocity of the fluid column is identical with the wave disturbance flow velocity reflected upwards, so as to generate the liquid standing wave.
5. according to the method described in claim 1, it is characterized in that, in the second part laser respectively in the different-waveband
Another side reflex to where wave band a upper wave band one side after, the method further includes：
The second part laser is reflected on the medium side of a upward wave band layer by layer, until in the one side of wave band or another
One side occurs to reflect and generate the ring of light.
6. a kind of generation device of the liquid standing wave ring of light, which is characterized in that described device includes：
Sink is used for, and the inverted sink is put down by the downward water pipe of nozzle at the uniform velocity flowing water to tablet, the nozzle to described
Plate section forms fluid column；
The tablet is used for, and the tablet wave upward to the fluid column is superimposed with the wave generation that the fluid column flows downward, institute
The liquid standing wave that nozzle to the flat plate section forms multiple wave bands is stated, the junction of the liquid standing wave and the tablet is described
The bottom of liquid standing wave；
Laser is used for, and transmitting laser is incident to the liquid from the one side of the liquid standing wave and stays to the liquid standing wave
Wave base portion；
The laser reflexes to the another side of the different-waveband of the liquid standing wave in the liquid standing wave bottom；
First part's laser occurs to reflect and generates the ring of light and second part swashs in the another side of the different-waveband respectively
The one side of a upper wave band for wave band where light reflexes to respectively in the another side of the different-waveband, and on described
The one side of one wave band occurs refraction and generates the ring of light；
Amplifier installation is used for, and the ring of light on the liquid standing wave is observed by amplifier installation；
One end of the water pipe is set in the sink, and the other end extends downwardly and the nozzle of the water pipe is located at the tablet
Top, the laser that the laser is located at the side of the tablet and the laser is sent out can irradiate the liquid and stay
Wave, one end of the amplifier installation are set to the tablet, and the other end upwardly extends.
7. device according to claim 6, which is characterized in that the laser is additionally operable to：
The Part III laser of the laser transmitting is all-trans in the liquid standing wave bottom is incident upon the liquid standing wave
The another side center of bottom wave band；
The Part III laser is all-trans at the another side center of the bottom wave band is incident upon a upper wave for the bottom wave band
The one side center of section, is incident upon until being all-trans at the nozzle, and hot spot is generated at the nozzle；
Hot spot is generated at the nozzle to further include：First part's laser of the laser transmitting is in the liquid standing wave
Bottom reflexes at the nozzle and hot spot is generated at the nozzle.
8. device according to claim 6, which is characterized in that described device further includes：
With height of the wave band that first part's laser is reflected in the another side of wave band apart from the bottom wave band
Degree increases, and the incidence angle reflected increases, and refraction angle increases, and visual angle increases；
Refraction angle θ 2=arcsin (n1/n2) sin θ 1, wherein θ 1 are first part's laser in the another of the bottom wave band
Incidence angle when one side reflects, when θ 2 is reflected for first part's laser in the another side of the bottom wave band
Refraction angle, n1 be liquid standing wave refractive index, n2 be air refractive index；
When (2 '-θ of θ 2) ＞ (1 '-θ of θ 1), wherein θ 1 ' are reflected for first part's laser in the another side of high band
Incidence angle, θ 2 ' be refraction angle of the first part's laser when the another side of high band reflects.
9. device according to claim 6, which is characterized in that the tablet is specifically used for：
The first capillary ripple when the fluid column is propagated straight down, after adding in plate obstacle, the fluid column surface generates disturbance,
Generate the second capillary ripple fluctuated upwards；
Second capillary ripple is superimposed with first capillary ripple generation propagated downwards, and generate has stable node by multiple
The liquid standing wave formed with the wave band of wave crest；
The downward flow velocity of the fluid column isWherein, U0 is the liquid
Column initial flow rate, U are the downward flow velocity of the fluid column, and V is the wave disturbance flow velocity that the fluid column reflects upwards, and H is fluid column distance
The distance of the nozzle, Water wave energy kr, r are fluid column radiuses, and ρ is the density of water, and f (kr) is constant；
The downward flow velocity of the fluid column is identical with the wave disturbance flow velocity reflected upwards, so as to generate the liquid standing wave.
10. device according to claim 6, which is characterized in that described device further includes：
The second part laser is reflected on the medium side of a upward wave band layer by layer, until in the one side of wave band or another
One side occurs to reflect and generate the ring of light.
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| CN2508327Y (en) * | 2001-11-14 | 2002-08-28 | 上海科技馆 | Standing wave demonstration device |
| CN102314787A (en) * | 2011-09-05 | 2012-01-11 | 南阳理工学院 | Novel standing wave demonstrating instrument |
| CN206497007U (en) * | 2017-02-21 | 2017-09-15 | 四川大学 | Liquid surface tension coefficient measuring device based on surface capillary ripple phenomenon |
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- 2018-01-29 CN CN201810086763.0A patent/CN108269472A/en active Pending
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|---|---|---|---|---|
| CN2508327Y (en) * | 2001-11-14 | 2002-08-28 | 上海科技馆 | Standing wave demonstration device |
| CN102314787A (en) * | 2011-09-05 | 2012-01-11 | 南阳理工学院 | Novel standing wave demonstrating instrument |
| CN206497007U (en) * | 2017-02-21 | 2017-09-15 | 四川大学 | Liquid surface tension coefficient measuring device based on surface capillary ripple phenomenon |
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