CN106023744B - standing wave demonstration method - Google Patents
standing wave demonstration method Download PDFInfo
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- CN106023744B CN106023744B CN201610541455.3A CN201610541455A CN106023744B CN 106023744 B CN106023744 B CN 106023744B CN 201610541455 A CN201610541455 A CN 201610541455A CN 106023744 B CN106023744 B CN 106023744B
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- 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 present invention discloses a kind of Standing wave demonstration method, it is characterized by comprising following steps: step a: designing a standing wave demonstrator, cylinder right end is equipped with a sound wave generating device, and frequency modulator is connected with sound wave generating device, and cylinder left end is connected by a droplet inlet pipe with ultrasonic atomizatio component；The top of cylinder barrel is provided with a strip along axial direction and sprays notch, and the forward and backward side that strip sprays notch is symmetrically arranged with one piece of transparent baffle；Step b: liquid ultrasonic is atomized into droplet, droplet is imported into cylinder by droplet inlet pipe by starting ultrasonic atomizatio component；Step c: starting sound wave generating device and frequency modulator, the frequency of sound wave of control frequency modulator adjustment sound wave generating device transmitting.Demonstrator used in this method has abandoned traditional demonstrator and has shown standing wave by the way of lighting fuel gas and showing standing wave, instead using the droplet after ultrasonic atomizatio, and in so avoiding the security risks that fire occurs, nor cylinder can be made hot.
Description
Technical field
The invention belongs to Physical Experiment field more particularly to a kind of Standing wave demonstration methods.
Background technique
As shown in Figure 1, existing standing wave demonstrator includes cylinder 1 and frequency modulator 5, wherein 1 sealing two ends of cylinder, cylinder
1 left end is connected by air inlet pipe 2 with fuel gas feedway 3, which is equidistantly equipped with row ejection branch along axial
Pipe 1a, cylinder 1 and ejection branch pipe 1a are metal tube.The right end of cylinder 1 is equipped with sound wave generating device 4, which fills
4 are set to be connected with the frequency modulator 5.
Method corresponding to above-mentioned standing wave demonstrator is as follows: fuel gas feedway 3 conveys combustible gas into cylinder 1
Body (such as methane), fuel gas are sprayed by spraying branch pipe 1a, and experimenter lights every ejection branch using manual firing's mode
Pipe 1a；Also, the frequency of sound wave issued by the adjustable sound wave generating device 4 of frequency modulator 5, and n=L/ λ, wherein L is cylinder
1 length, λ are the wavelength of sound wave.When n is integer, sound wave is standing wave, and at this moment spraying the flame that branch pipe 1a sprays has height to have
Low, high point represents the wave crest of sound wave, and low spot represents the trough of sound wave, to demonstrate out standing wave.
The defect of existing Standing wave demonstration method is as follows:
1, due to demonstrating standing wave using fuel gas, two main problems be will lead in this way, one is interior is drilled
The safety shown is poor, easily generation safety accident；The second is gas fuel burning cylinder 1 and sprays branch pipe 1a after for a period of time
Can be very boiling hot, it in order to realize cooling, must be stopped using after demonstrating a period of time, after cylinder 1 and ejection branch pipe 1a is completely cooling
It is demonstrated, cannot be thus used continuously again；
2, existing demonstrator is equidistantly equipped with one group of ejection branch pipe 1a, can only thus find out wave crest and trough, cannot be formed
Continuous waveform results in demonstrating effect to be improved in this way.
Summary of the invention
Technical problem to be solved by the present invention lies in provide the Standing wave demonstration side that one kind is highly-safe, can be used continuously
Method, and continuous standing wave waveform can be formed.
1, technical scheme is as follows: a kind of Standing wave demonstration method, it is characterised in that include the following steps:
Step a: designing a standing wave demonstrator, which includes cylinder (1), sound wave generating device (4)
With frequency modulator (5), wherein cylinder (1) sealing two ends, the cylinder right end are equipped with a sound wave generating device (4), which occurs
Device can emit sound wave into cylinder (1)；The frequency modulator (5) is connected with sound wave generating device, and can change the frequency of sound wave,
Cylinder (1) left end is connected by a droplet inlet pipe (6) with ultrasonic atomizatio component (7), and the ultrasonic atomizatio component is by liquid
It is atomized into droplet, and conveys droplet into cylinder (1) by droplet inlet pipe (6)；The left part of cylinder (1) inner cavity is equipped with one
Block radial direction baffle (8), the radial direction baffle is vertical with the axial line of cylinder (1), and radial baffle (8) lower end is hanging, and blocks institute
The connector of droplet inlet pipe (6) Yu cylinder (1) is stated, and the rest part of radial baffle (8) is fixed with cylinder (1) inner wall；It is described
The top of cylinder (1) barrel is provided with a strip along axial direction and sprays notch (1a '), which sprays notch and be located at the diameter
On the right of to baffle (8), and communicated with the inner cavity of cylinder (1)；The forward and backward side that the strip sprays notch (1a ') is symmetrically arranged with
The length of one piece of transparent baffle (9), the transparent baffle is equal with strip ejection notch (1a '), and the upper end of transparent baffle (9)
Vacantly, lower end and the outer wall of the cylinder (1) are fixed；
Step b: starting the ultrasonic atomizatio component (7), and liquid ultrasonic is atomized into droplet, droplet by the droplet into
Pipe (6) is imported into cylinder (1), and is sprayed from the strip and sprayed at notch (1a ')；
Step c: start the sound wave generating device (4) and frequency modulator (5), sound wave generating device (4) hair into cylinder (1)
Penetrate sound wave；The frequency modulator (5) are controlled, so as to adjust the frequency of sound wave of sound wave generating device (4) transmitting, so as to adjust sound wave
Wavelength；According to n=L/ λ, wherein L is length of radial baffle (8) the right panel face to cylinder (1) right end, and λ is the wavelength of sound wave；Work as n
When for integer, sound wave is standing wave, at this time through transparent baffle (9) it can be seen that strip, which sprays notch (1a '), sprays continuous wave,
The continuous wave is exactly standing wave.
Be compared with the traditional method, the used demonstrator of the present invention eliminate fuel gas feedway in traditional structure with
Air inlet pipe, instead increase droplet inlet pipe (6) and ultrasonic atomizatio component (7)；It eliminates in traditional structure simultaneously
Branch pipe is sprayed, and has opened a strip in cylinder (1) and has sprayed notch (1a '), while being additionally arranged two pieces of transparent baffles (9).By
The fuel gas feedway in traditional structure, air inlet pipe are eliminated in this method and sprays branch pipe, are no longer needed for so a little
Fuel gas is fired, in so avoiding the security risks that fire occurs, nor cylinder can be made hot, so as to guarantee
Continuous demonstration, so as to improve the service performance of demonstrator.Demonstrator used by this method in use, ultrasonic atomizatio component by liquid
Body is atomized into droplet, and droplet is conveyed into cylinder (1) by droplet inlet pipe (6), and droplet bypasses radial baffle (8) lower end and circle
Entering cylinder (1) after notch between cylinder (1), and sprays notch (1a ') from strip and spray, the form of ejection is strip,
And blocked by two pieces of transparent baffles (9), to realize positioning and guiding.The sound wave generating device can the transmitting into cylinder (1)
Sound wave, frequency modulator (5) can change the frequency of sound wave, and n=L/ λ, and wherein L is baffle (8) right panel face to cylinder in the present invention
(1) length of right end, λ are the wavelength of sound wave.When n is integer, sound wave is standing wave, at this moment can be seen through transparent baffle (9)
It observes the droplet that strip ejection notch (1a ') sprays and shows a continuous waveform, and there is wave crest and trough.It needs especially
Illustrate, the display of standing wave is unrelated with medium, and the fuel gas of burning and the droplet after atomization can show standing wave, exactly
Improvement of this characteristic just for Standing wave demonstration method provides possibility.In addition, radial baffle (8) can block sound wave, sound wave is allowed
It reflects well, guarantees that sound wave is steadily propagated and reflected in cylinder (1).
Using above technical scheme, demonstrator used in this method has been abandoned traditional demonstrator and has been shown using lighting fuel gas
The mode of standing wave, instead standing wave is shown using the droplet after ultrasonic atomizatio, in so avoiding fire occurs
Security risk, nor cylinder can be made hot, so as to guarantee continuously to demonstrate；In addition, the standing wave of this method demonstration is
Continuous wave can only realize that the wave crest of standing wave and trough are more intuitive and eye-catching than traditional presentation method, drill to greatly improve
Show effect, thus overcomes the defect of existing demenstration method well.
As the optimization design of this case, the droplet inlet pipe (6) is " Z " character form structure, the vertical pipe section of the droplet inlet pipe
Pass through arc section transition, and the axial line of a horizontal pipe section above and cylinder (1) with the junction of two horizontal pipe sections
Outer wall is concordant.
It designs using the above structure, has the advantages that following two: becoming first is that arc section can prevent droplet from encountering bending place
Drop, this structure are concordantly matched with the axial line of a horizontal pipe section above with the outer wall of cylinder (1), can guarantee that droplet is flat
It is quietly transported in cylinder, second is that interference of the external pressure to Acoustic Wave Propagation in cylinder is reduced, because the propagation of sound wave is to medium
Move it is very sensitive, this ensures that normal operation of the invention, so droplet inlet pipe (6) is not letter using " Z " character form structure
Single conventional design, it is creative.
In the present case, the ultrasonic atomizatio component (7) includes ultrasonic atomizatio tank (7a) and fan (7d), wherein ultrasonic atomizatio
Tank (7a) is closed container, and the bottom surface of the ultrasonic atomizatio tank is installed with piezoelectric ceramic piece (7b), the piezoelectric ceramic piece it is positive and negative
Pole passes through conducting wire respectively and is electrically connected with ultrasonic atomizatio circuit board (7c), to pass through ultrasonic atomizatio circuit board for ultrasonic atomizatio tank
Liquid in (7a) is atomized into droplet；The fan (7d) is mounted in the left side of ultrasonic atomizatio tank (7a) tank skin, and droplet is blowed to
The connector on ultrasonic atomizatio tank (7a) tank skin right side and droplet inlet pipe (6) liquid feeding end, to blow to the droplet inlet pipe (6)
It is interior.
Using above technical scheme, liquid ultrasonic reliably can be atomized into droplet by the ultrasonic atomizatio component (7), and super
The structure of sound atomizing component (7) is simple, easy to implement, has good practicability.
In the present case, the liquid of ultrasonic atomizatio component (7) atomization is water, and water is not only drawn materials conveniently, but also chemistry is steady
It is qualitative very strong, it is not susceptible to the safety accidents such as burning, explosion.
Preferably, being connected with a liquid collection tank (10) by collecting pipe below the cylinder (1), which is collected
Tank is used to collect the liquid in cylinder (1) inner cavity, and valve is in series on collecting pipe, can thus collect in time in cylinder (1)
Liquid, prevent liquid deposition from interfered in the cylinder (1) to the propagation of sound wave.
For the ease of materials, the sound wave generating device (4) uses loudspeaker.
The utility model has the advantages that demonstrator used in this method has abandoned traditional demonstrator using the side for lighting fuel gas display standing wave
Formula, instead standing wave is shown using the droplet after ultrasonic atomizatio, in so avoiding the safety that fire occurs is hidden
Suffer from, nor cylinder can be made hot, so as to guarantee continuously to demonstrate；In addition, the standing wave of this method demonstration is continuous wave,
It can only realize that the wave crest of standing wave and trough are more intuitive and eye-catching than traditional presentation method, so that demonstrating effect is greatly improved, this
Sample just overcomes the defect of existing demenstration method well.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that traditional presentation method uses demonstrator.
Fig. 2 is the schematic diagram that this demenstration method uses demonstrator.
Fig. 3 is the sectional view along A-A of Fig. 2.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples:
As shown in Figure 2,3, a kind of Standing wave demonstration method, it is characterised in that include the following steps:
Step a: designing a standing wave demonstrator, and the standing wave demonstrator is mainly by cylinder 1, sound wave generating device 4, tune
Frequency device 5, droplet inlet pipe 6, ultrasonic atomizatio component 7, radial baffle 8, transparent baffle 9 and liquid collection tank 10 are constituted.Wherein, cylinder
1 material can be stainless steel or plastics, its material should not Seeking Truth metal resistant to high temperature.For the ease of observation, cylinder 1 is designed
For transparent cylinder.1 sealing two ends of cylinder, the cylinder right end are equipped with a sound wave generating device 4, which can be to circle
Emit sound wave in cylinder 1.In the present case, sound wave generating device 4 uses loudspeaker, and the vibrating diaphragms of the loudspeaker is towards in cylinder 1.Frequency modulator 5
It is connected with sound wave generating device, and the frequency of sound wave can be changed, connection type is using existing mature mode.
1 left end of cylinder is connected by a droplet inlet pipe 6 with ultrasonic atomizatio component 7, and the ultrasonic atomizatio component is by liquid mist
It is melted into droplet, and droplet is conveyed into cylinder 1 by droplet inlet pipe 6.In the present case, the liquid of the atomization of ultrasonic atomizatio component 7 is
Water.
In the present invention, ultrasonic atomizatio component 7 uses existing mature structure, and including ultrasonic atomizatio tank 7a and fan
7d, wherein ultrasonic atomizatio tank 7a is closed container, a filling opening is equipped at the top of ultrasonic atomizatio tank 7a, which can be by close
Capping closing.The bottom surface of ultrasonic atomizatio tank 7a is installed with piezoelectric ceramic piece 7b, and the positive and negative electrode of the piezoelectric ceramic piece passes through respectively
Conducting wire is electrically connected with ultrasonic atomizatio circuit board 7c, to be atomized the liquid in ultrasonic atomizatio tank 7a by ultrasonic atomizatio circuit board
At droplet；Fan 7d is mounted in the left side of ultrasonic atomizatio tank 7a tank skin, and droplet is blowed to ultrasonic atomizatio tank 7a tank skin right side and mist
The connector for dripping 6 liquid feeding end of inlet pipe, to blow in the droplet inlet pipe 6.Droplet inlet pipe 6 is " Z " character form structure, the droplet inlet pipe
Vertical pipe section and the junctions of two horizontal pipe sections pass through arc section transition, above a horizontal pipe section axial line and circle
The outer wall of cylinder 1 is concordant, and the axis parallel of the axial line of two horizontal pipe sections and cylinder 1.
As shown in Figure 2,3, the left part of 1 inner cavity of cylinder is equipped with one piece of radial baffle 8, the axis of the radial direction baffle 8 and cylinder 1
Heart line is vertical.Radial 8 lower end of baffle is hanging, and blocks the connector of droplet inlet pipe 6 Yu cylinder 1, and its remaining part of radial baffle 8
Divide and is fixed with 1 inner wall of cylinder.The top of 1 barrel of cylinder is provided with a strip along axial direction and sprays notch 1a ', which sprays
Notch is located at radial 8 the right of baffle, and runs through the inner and outer wall of cylinder 1, and communicate with the inner cavity of cylinder 1.Strip sprays
The forward and backward side of notch 1a ' is symmetrically arranged with one piece of transparent baffle 9, and length and the strip of the transparent baffle spray notch 1a ' phase
Deng.The upper end of transparent baffle 9 is hanging, and lower end and the outer wall of cylinder 1 are fixed.One is connected with by collecting pipe below cylinder 1
Liquid collection tank 10, which is used to collect the liquid in 1 inner cavity of cylinder, and valve is in series on collecting pipe.
Step b: starting the ultrasonic atomizatio component 7, liquid ultrasonic is atomized into droplet, droplet passes through the droplet inlet pipe
6 imported into cylinder 1, and spray from the strip and spray at notch 1a '；
Step c: starting the sound wave generating device 4 and frequency modulator 5, and sound wave generating device 4 emits sound wave into cylinder 1；
The frequency modulator 5 is controlled, so as to adjust the frequency of sound wave that sound wave generating device 4 emits, so as to adjust the wavelength of sound wave；According to n
=L/ λ, wherein L is length of the radial 8 right panel face of baffle to 1 right end of cylinder, and λ is the wavelength of sound wave；When n is integer, sound wave
For standing wave, at this time through transparent baffle 9 it can be seen that strip, which sprays notch 1a ', sprays continuous wave, which is exactly to stay
Wave.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not limitation with the present invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (5)
1. a kind of Standing wave demonstration method, it is characterised in that include the following steps:
Step a: designing a standing wave demonstrator, which includes cylinder (1), sound wave generating device (4) and adjust
Frequency device (5), wherein cylinder (1) sealing two ends, the cylinder right end are equipped with a sound wave generating device (4), the sound wave generating device
Sound wave can be emitted into cylinder (1)；The frequency modulator (5) is connected with sound wave generating device, and can change the frequency of sound wave, described
Cylinder (1) left end is connected by a droplet inlet pipe (6) with ultrasonic atomizatio component (7), which atomizes the liquid into
Droplet is conveyed into cylinder (1) at droplet, and by droplet inlet pipe (6)；The left part of cylinder (1) inner cavity is equipped with one piece of diameter
To baffle (8), the radial direction baffle is vertical with the axial line of cylinder (1), and radial baffle (8) lower end is hanging, and blocks the mist
The connector of inlet pipe (6) and cylinder (1) is dripped, and the rest part of radial baffle (8) is fixed with cylinder (1) inner wall；The cylinder
(1) top of barrel is provided with strip ejection notch (1a ') along axial direction, which sprays notch and be located at the radial gear
On the right of plate (8), and communicated with the inner cavity of cylinder (1)；The forward and backward side that the strip sprays notch (1a ') is symmetrically arranged with one piece
The length of transparent baffle (9), the transparent baffle is equal with strip ejection notch (1a '), and the upper end of transparent baffle (9) is outstanding
The outer wall of sky, lower end and the cylinder (1) is fixed；
Step b: starting the ultrasonic atomizatio component (7), liquid ultrasonic is atomized into droplet, droplet passes through the droplet inlet pipe
(6) it imported into cylinder (1), and sprays from the strip and sprayed at notch (1a ')；
Step c: starting the sound wave generating device (4) and frequency modulator (5), and sound wave generating device (4) is to the interior transmitting sound of cylinder (1)
Wave；The frequency modulator (5) are controlled, so as to adjust the frequency of sound wave of sound wave generating device (4) transmitting, so as to adjust the wave of sound wave
It is long；According to n=L/ λ, wherein L is length of radial baffle (8) the right panel face to cylinder (1) right end, and λ is the wavelength of sound wave；When n is
When integer, sound wave is standing wave, at this time through transparent baffle (9) it can be seen that strip ejection notch (1a ') ejection continuous wave, is somebody's turn to do
Continuous wave is exactly standing wave；
The droplet inlet pipe (6) is " Z " character form structure, and the vertical pipe section of the droplet inlet pipe and the junction of two horizontal pipe sections are equal
By arc section transition, and the axial line of a horizontal pipe section above is concordant with the outer wall of cylinder (1).
2. Standing wave demonstration method according to claim 1, it is characterised in that: the ultrasonic atomizatio component (7) includes ultrasound
Atomization tank (7a) and fan (7d), wherein ultrasonic atomizatio tank (7a) is closed container, and the bottom surface of the ultrasonic atomizatio tank is installed with
Piezoelectric ceramic piece (7b), the positive and negative electrode of the piezoelectric ceramic piece pass through conducting wire respectively and are electrically connected with ultrasonic atomizatio circuit board (7c), from
And the liquid in ultrasonic atomizatio tank (7a) is atomized by droplet by ultrasonic atomizatio circuit board；The fan (7d) is mounted in ultrasonic mist
Change the left side of tank (7a) tank skin, and droplet is blowed into ultrasonic atomizatio tank (7a) tank skin right side and droplet inlet pipe (6) liquid feeding end
Connector, to blow in the droplet inlet pipe (6).
3. Standing wave demonstration method according to claim 1, it is characterised in that: the liquid of ultrasonic atomizatio component (7) atomization
Body is water.
4. Standing wave demonstration method according to claim 1, it is characterised in that: connected below the cylinder (1) by collecting pipe
It is connected to a liquid collection tank (10), which is used to collect the liquid in cylinder (1) inner cavity, and connects on collecting pipe
There is valve.
5. Standing wave demonstration method according to claim 1, it is characterised in that: the sound wave generating device (4) uses loudspeaker.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610541455.3A CN106023744B (en) | 2016-07-11 | 2016-07-11 | standing wave demonstration method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610541455.3A CN106023744B (en) | 2016-07-11 | 2016-07-11 | standing wave demonstration method |
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| CN106023744A CN106023744A (en) | 2016-10-12 |
| CN106023744B true CN106023744B (en) | 2019-01-08 |
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| CN101958073A (en) * | 2010-09-09 | 2011-01-26 | 德州学院 | Comprehensive sound characteristic experimental instrument |
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| CN103559821A (en) * | 2013-10-23 | 2014-02-05 | 国家电网公司 | Standing wave generating and demonstrating device of lengthwise waves |
| CN103645117A (en) * | 2013-12-11 | 2014-03-19 | 辽宁工程技术大学 | Gas standing wave determination experimental device |
| CN203552550U (en) * | 2013-10-18 | 2014-04-16 | 黄河科技学院 | Ultrasonic spraying device used for Millikan oil drop experiment |
| CN204791701U (en) * | 2015-06-24 | 2015-11-18 | 皖西学院 | Sound standing wave demonstration appearance |
| CN204791700U (en) * | 2015-06-24 | 2015-11-18 | 皖西学院 | Sound standing wave presentation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3108831A1 (en) * | 1981-03-09 | 1983-01-05 | Bruno 7900 Ulm Isigkeit | Light-transmitting sinusoidally coloured tape |
| CN201060582Y (en) * | 2007-07-13 | 2008-05-14 | 南京师范大学 | Sound stationary wave phenomenon demonstrator |
| CN101958073A (en) * | 2010-09-09 | 2011-01-26 | 德州学院 | Comprehensive sound characteristic experimental instrument |
| CN103021231A (en) * | 2011-09-22 | 2013-04-03 | 吴全如 | Multifunctional transverse wave, longitudinal wave, ring wave and standing wave demonstrator |
| CN202258048U (en) * | 2011-10-18 | 2012-05-30 | 吴全如 | Sound standing wave resonance demonstrator |
| CN203552550U (en) * | 2013-10-18 | 2014-04-16 | 黄河科技学院 | Ultrasonic spraying device used for Millikan oil drop experiment |
| CN103559821A (en) * | 2013-10-23 | 2014-02-05 | 国家电网公司 | Standing wave generating and demonstrating device of lengthwise waves |
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| CN106023744A (en) | 2016-10-12 |
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