CN102314787A - Novel standing wave demonstrating instrument - Google Patents
Novel standing wave demonstrating instrument Download PDFInfo
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- CN102314787A CN102314787A CN201110259497A CN201110259497A CN102314787A CN 102314787 A CN102314787 A CN 102314787A CN 201110259497 A CN201110259497 A CN 201110259497A CN 201110259497 A CN201110259497 A CN 201110259497A CN 102314787 A CN102314787 A CN 102314787A
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Abstract
The invention belongs to the field of teaching instruments and concretely relates to a novel standing wave demonstrating instrument, which aims to provide the novel standing wave demonstrating instrument which not only can be used for demonstrating transverse standing waves, but also can be used for demonstrating vertical standing waves, can also be used for demonstrating the relation of circular motion and simple harmonic motion and can be used for adjusting the frequency of the standing waves. The invention provides the following technical scheme that: the novel standing-wave demonstrating instrument is provided with a frame, wherein a direct-current motor is fixed on the frame, a disk is installed on an output shaft of the direct-current motor, a short shaft is arranged on the disk, a T-shaped clamping sleeve is hung on the short shaft, the T-shaped clamping sleeve can upwards and downwards move under the restriction of a guiding sleeve, the lower end of the T-shaped clamping sleeve is provided with a small hole, one end of a vibrating body for forming the standing waves is fixed on the small hole, and a heavy object is hung at the other end of the vibrating body. Compared with a standing wave demonstrating teaching aid used at present, the novel standing wave demonstrating instrument has the advantages of multiple functions, small size, low manufacturing cost, safety, reliability, convenience in carrying and the like.
Description
Technical field
The invention belongs to the instruments used for education field, be specifically related to a kind of novel Standing wave demonstration appearance.
Background technology
The propagation of mechanical vibration in medium is exactly mechanical wave.Two direction of vibration is identical, frequency is identical, two train waves of propagating the in opposite directions stack of phase difference constant, can form a kind of special interference-standing wave.When saying standing wave,, be difficult to make clear if mismatch corresponding lecture experiment.The medium of present employed Standing wave demonstration appearance has: air dielectric, aqueous medium, elastic threads, spring etc.; The vibration source that uses has: tuning fork, loudspeaker, Vib., dotted timer etc.But these Standing wave demonstration appearance or can only demonstrate transverse stationary wave, or can only demonstrate longitudinal stationary wave, function is all more single, and formed standing wave frequency is uncontrolled and can not artificial arbitrarily adjustment.Therefore, be necessary to develop a kind of transverse stationary wave of can demonstrating and demonstrate the novel Standing wave demonstration appearance that longitudinal stationary wave and standing wave frequency can artificial adjustment again.
In physics teaching, tell about in the simple harmonic motion, for visual in image, be convenient to understand, once introduced the rotating vector method.The rotating vector method shows: circular motion and simple harmonic motion have close getting in touch, and circular motion is exactly simple harmonic motion in the projection of a certain direction.Therefore, can from circular motion, obtain simple harmonic motion, as the wave source of Standing wave demonstration appearance.As the novel Standing wave demonstration appearance of wave source, not only can demonstrate transverse stationary wave and longitudinal stationary wave, can also image demonstration circular motion and the relation of simple harmonic motion, be specially adapted to class demonstration.
Summary of the invention
The object of the present invention is to provide and a kind ofly can demonstrate transverse stationary wave, can demonstrate longitudinal stationary wave again, can also demonstrate circular motion and simple harmonic motion relation and can adjust the novel Standing wave demonstration appearance of standing wave frequency.
In order to realize above purpose, the invention provides following technical scheme: a kind of novel Standing wave demonstration appearance is characterized in that: have frame; Be fixed with on the frame by direct current generator, on the output shaft of direct current generator disk be installed, disk is provided with minor axis; T shape cutting ferrule is suspended on the said minor axis, and said T shape is fastened under the constraint of guide pin bushing and can moves up and down, and there is an aperture lower end of T shape cutting ferrule; An end that forms the vibrating mass of standing wave is fixed on the said aperture, other end suspension weight.
The vibrating mass of said formation standing wave is the string of a musical instrument, and the string of a musical instrument one end is fixed on the aperture of T shape cutting ferrule lower end, and the other end hangs weight after striding across fixed pulley.
The vibrating mass of said formation standing wave is the condensation wave spring; Condensation wave spring one end is fixed on the aperture of T shape cutting ferrule lower end, the other end sagging naturally and the suspension weight it is fixed.
Said condensation wave spring, its diameter wiry is 1mm, spring diameter 40mm, pitch 5mm, former long 200mm.
Said direct current generator input voltage can be regulated between 6V-8V.
Novel Standing wave demonstration appearance of the present invention obtains simple harmonic motion, as the wave source of Standing wave demonstration appearance from circular motion.As the novel Standing wave demonstration appearance of wave source, both can demonstrate transverse stationary wave, can demonstrate longitudinal stationary wave again, can also demonstrate the relation of circular motion and simple harmonic motion, be specially adapted to class demonstration.In presentation process, can produce the standing wave of different frequency through the input voltage of adjustment direct current generator.Compare with the Standing wave demonstration teaching aid of present use, have advantages such as function is many, volume is little, cost is low, safe and reliable, easy to carry.
Description of drawings
Below in conjunction with accompanying drawing specific embodiment of the present invention is done further detailed explanation.
Fig. 1 is the front view of novel Standing wave demonstration appearance.
Fig. 2 is the left view of novel Standing wave demonstration appearance.
Fig. 3 carries out the synoptic diagram of transverse stationary wave demonstration for novel Standing wave demonstration appearance.
Fig. 4 carries out the synoptic diagram of longitudinal stationary wave demonstration for novel Standing wave demonstration appearance.
Embodiment
Like Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, a kind of novel Standing wave demonstration appearance, comprise frame 1, be fixed on the frame 1 by direct current generator 6; Disk 2 is installed on the output shaft of direct current generator, and disk 2 is provided with cylindrical stub shaft 3, and T shape cutting ferrule 4 is suspended on the cylindrical stub shaft 3; Said T shape cutting ferrule 4 can be moved up and down by guide pin bushing 5 constraints that are fixed on the frame 1, and there is an aperture 7 lower end of T shape cutting ferrule 4; An end that forms the vibrating mass of standing wave is fixed on the said aperture 7, other end suspension weight.When the demonstration shear wave, vibrating mass adopts the string of a musical instrument 8; During the demonstration compressional wave, vibrating mass adopts condensation wave spring 11.
Demonstration is during shear wave, and an end of the string of a musical instrument 8 is fixed on the terminal aperture 7 of T shape cutting ferrule 4, and the other end strides across fixed pulley 9 and hangs weight 10.Connect direct supply; Under the drive of the direct current generator 6 of uniform rotation; Cylindrical stub shaft 3 drives T shape cutting ferrule 4 and moves along guide pin bushing 5 along with disk 2 together rotates, and at this moment simple harmonic motion is done in T shape cutting ferrule 4 lower ends; Thereby drive the string of a musical instrument 8 and do simple harmonic motion together, in the string of a musical instrument of tensioning, cause shear wave from left to right.This shear wave arrives pulley 9 places and is reflected, and forms the shear wave of right-to-left.The stack of meeting of two shear waves forms transverse stationary wave.In presentation process, can change the frequency of shear wave through the input voltage of adjustment direct current generator 6 between 6V-8V or the weight of the adjustment string of a musical instrument 8 terminal weights 10, so that demonstrate the formed transverse stationary wave of different frequency shear wave.
Demonstration is fixed on condensation wave spring 11 1 ends on the aperture 7 of T shape cutting ferrule 4 lower ends during compressional wave, and the other end is sagging naturally and hang weight 12 it is fixed.Connect direct supply; Under the drive of the direct current generator 6 of uniform rotation; Cylindrical stub shaft 3 is along with disk 2 together rotates, and drives T shape cutting ferrule 4 and moves along guide pin bushing, and at this moment simple harmonic motion is done in T shape cutting ferrule 4 lower ends; Thereby drive condensation wave spring 11 and do simple harmonic motion together, in condensation wave spring 11, cause the top-down compressional wave.This compressional wave is reflected after arriving condensation wave spring 11 lower end bearings, forms bottom-up compressional wave, the stack of meeting of two compressional waves, formation longitudinal stationary wave.In presentation process, can change the frequency of compressional wave through the input voltage of adjustment direct current generator 6 between 6V-8V, so that the formed longitudinal stationary wave of demonstration different frequency compressional wave.In order to obtain relatively good demonstration effect, condensation wave spring 11 diameters wiry are 1mm, spring diameter 40mm, pitch 5mm, former long 200mm.
Claims (5)
1. a novel Standing wave demonstration appearance is characterized in that: have frame, be fixed with on the frame by direct current generator; On the output shaft of direct current generator disk is installed, disk is provided with minor axis, and T shape cutting ferrule is suspended on the said minor axis; Said T shape can move up and down under the guide pin bushing constraint of cutting ferrule; There is an aperture lower end of T shape cutting ferrule, and an end that forms the vibrating mass of standing wave is fixed on the said aperture, other end suspension weight.
2. novel Standing wave demonstration appearance as claimed in claim 1 is characterized in that: said vibrating mass is the string of a musical instrument.
3. novel Standing wave demonstration appearance as claimed in claim 1 is characterized in that: said vibrating mass is the condensation wave spring.
4. novel Standing wave demonstration appearance as claimed in claim 1 is characterized in that: said direct current generator input voltage can be regulated between 6V-8V.
5. novel Standing wave demonstration appearance as claimed in claim 3 is characterized in that: the diameter of said condensation wave wire of spring is 1mm, spring diameter 40mm, pitch 5mm, former long 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110259497A CN102314787A (en) | 2011-09-05 | 2011-09-05 | Novel standing wave demonstrating instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110259497A CN102314787A (en) | 2011-09-05 | 2011-09-05 | Novel standing wave demonstrating instrument |
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| CN102314787A true CN102314787A (en) | 2012-01-11 |
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| CN201110259497A Pending CN102314787A (en) | 2011-09-05 | 2011-09-05 | Novel standing wave demonstrating instrument |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559815A (en) * | 2013-10-23 | 2014-02-05 | 国家电网公司 | Round standing wave generator |
| CN104318825A (en) * | 2014-10-27 | 2015-01-28 | 沈阳师范大学 | String vibration period experiment instrument with vibration motor and electric vibration tuning fork as double vibration wave sources |
| CN107424485A (en) * | 2017-08-18 | 2017-12-01 | 西华师范大学 | A kind of new simple harmonic oscillation demonstrator |
| CN108269472A (en) * | 2018-01-29 | 2018-07-10 | 湖北汽车工业学院 | A kind of production method and device of the liquid standing wave ring of light |
| CN114299793A (en) * | 2021-12-31 | 2022-04-08 | 陕西科技大学 | Demonstration instrument for transverse wave and standing wave in different media |
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| CN2370500Y (en) * | 1999-04-09 | 2000-03-22 | 刘若愚 | Suspending arm spring resonant source standing wave tester |
| CN2590095Y (en) * | 2002-12-13 | 2003-12-03 | 徐云友 | Standing wave demonstrating device for teaching |
| CN101127162A (en) * | 2007-09-21 | 2008-02-20 | 北京工业大学 | Linear displacement mechanical oscillator |
| CN202196530U (en) * | 2011-09-05 | 2012-04-18 | 南阳理工学院 | Novel standing wave demonstration instrument |
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2011
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Patent Citations (4)
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| CN2370500Y (en) * | 1999-04-09 | 2000-03-22 | 刘若愚 | Suspending arm spring resonant source standing wave tester |
| CN2590095Y (en) * | 2002-12-13 | 2003-12-03 | 徐云友 | Standing wave demonstrating device for teaching |
| CN101127162A (en) * | 2007-09-21 | 2008-02-20 | 北京工业大学 | Linear displacement mechanical oscillator |
| CN202196530U (en) * | 2011-09-05 | 2012-04-18 | 南阳理工学院 | Novel standing wave demonstration instrument |
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| 罗治安: "纵波和纵驻波演示仪", 《大学物理实验》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559815A (en) * | 2013-10-23 | 2014-02-05 | 国家电网公司 | Round standing wave generator |
| CN104318825A (en) * | 2014-10-27 | 2015-01-28 | 沈阳师范大学 | String vibration period experiment instrument with vibration motor and electric vibration tuning fork as double vibration wave sources |
| CN104318825B (en) * | 2014-10-27 | 2016-10-19 | 沈阳师范大学 | Vibrating motor and Chord vibration cycle experimental instrument and operational approach thereof that the electric tuning fork that shakes is pair vibration wave source |
| CN107424485A (en) * | 2017-08-18 | 2017-12-01 | 西华师范大学 | A kind of new simple harmonic oscillation demonstrator |
| CN108269472A (en) * | 2018-01-29 | 2018-07-10 | 湖北汽车工业学院 | A kind of production method and device of the liquid standing wave ring of light |
| CN114299793A (en) * | 2021-12-31 | 2022-04-08 | 陕西科技大学 | Demonstration instrument for transverse wave and standing wave in different media |
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Application publication date: 20120111 |