CN101114406A - Demonstration method and apparatus for resonance - Google Patents
Demonstration method and apparatus for resonance Download PDFInfo
- Publication number
- CN101114406A CN101114406A CNA2006100293510A CN200610029351A CN101114406A CN 101114406 A CN101114406 A CN 101114406A CN A2006100293510 A CNA2006100293510 A CN A2006100293510A CN 200610029351 A CN200610029351 A CN 200610029351A CN 101114406 A CN101114406 A CN 101114406A
- Authority
- CN
- China
- Prior art keywords
- vibrating reed
- vibration seat
- resonance effect
- vibrating
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention relates to a resonance phenomenon demonstration method and device, the resonance phenomenon demonstration instrument of the prior art is relatively complicated in structure, and the operation is not simple enough. The invention provides a resonance phenomenon demonstration device of simple structure, easy manufacture, convenient operation and distinct effect, which comprises a plurality of vibrating sheets (or vibrating stripes) of the same material, the same section area and different lengths. In the process of demonstration, an operator only needs to pinch the lower side of a vibrating base by hands and swings to the both sides, when the swing frequency equals to or is close to the intrinsic frequency of the vibrating sheets (stripes) of certain lengths, resonance phenomena occur respectively. The positive effect of the invention is that the acoustic resonance phenomenon demonstration is simplified and visualized. A resonance phenomenon demonstration device of distinct experiment effect can be made by using a plurality of simple materials and simple manufacture method. The invention is beneficial to the students to improve experiment practical ability and deepen the understanding of the scientific principle.
Description
Technical field
The present invention relates in a kind of physics teaching about the experimental provision of acoustics, particularly relate to the experimental technique and the device of the relevant resonance effect of acoustics part in the relevant physics teaching.
Background technology
The resonance effect of acoustics in the relevant physics teaching, all once had in the teaching for example: as 1940, the Ta Kemu bridge that the total length of the U.S. is 860 meters was because of big wind-induced vibration disrepair, although wind speed at that time is less than 1/3 of design wind speed limit value; And for example the middle of last century, near long bridge of the 102 meters Angers, France city because of one group of soldier marches, causes that bridge caves in, dead 226 people on bridge.These are all because due to the natural frequency of the formed driving frequency of vibration that external force produced and bridge resonates when identical, illustrate that the resonance effect and the mankind are closely bound up.In order to make the student can grasp the principles of science of resonance effect in the acoustics, school has adopted the physics laboratory some experimental provisions to be proved resonance effect, as: a kind of resonance effect demonstrator of being made up of the spring suspension oscillator: the upper end of spring is connected with the crank of crank, the lower end hangs the weight oscillator, earlier oscillator is pulled down, let go, rebound again, downward again ... do free vibration, write down its vibration frequency, rotate crank then, observe the vibration frequency of oscillator again, these two vibration frequencies are different, previous vibration is that what draw is the natural frequency of oscillator by the character decision of spring oscillator itself; Back one vibration is by external driving force decision, and what obtain is the driving force frequency.When with different rotational speed cranks, during near the natural frequency of spring oscillator, the amplitude of oscillator increases gradually up to the rotational frequency of this external driving force; When the driving force frequency equaled the oscillator natural frequency, the amplitude maximum of oscillator showed resonance effect.In a word, the resonance effect demonstrator of prior art is all comparatively complicated comparatively speaking, also easy inadequately in the operation, the demonstration conclusion is also simple and clear inadequately, brief, can not accomplish apparatus for demonstrating of each student's staff on the classroom, everybody be taken action on one's own to do experiment deepen that the understanding of text is had certain limitation.
Summary of the invention
In order to overcome the deficiency that prior art exists, the present invention proposes a kind of easy resonance effect demenstration method and the technical scheme of device, design a kind of simple in structure, to make easy, easy to operate, outstanding effect resonance effect apparatus for demonstrating be purpose of the present invention.Technical scheme of the present invention is to come specific implementation by following technical measures, a kind of resonance effect demenstration method, it is characterized in that it is identical by several materials, sectional area is identical, vibrating reed different in size (or vibrator bar) and a vibration seat are formed a resonance effect demonstrator, wherein: the end alignment of vibrating reed that several are different in size or vibrator bar, be fixed on side by side successively on the vibration seat, the material capability of described vibrating reed (bar) must have certain rigidity, when no external force is collided is straight and upright, be subjected to external force collision meeting bending slightly, external force promptly recovers straight and upright in case disappear, and generally can select thin plastic sheet for use, foil, paperboard, thin sticking plaster, lightweight materials such as thin metal bar.The material of vibration seat does not limit arbitrarily, can adopt clampings, bonding, welding, rivet with the fixing means of vibrating reed (bar).Need only in the presentation process with hand and pinch vibration seat below, vertical direction both sides swing along the plane that all vibrating reeds arranged side by side (bar) are formed, when hunting frequency is low, long vibrating reed (bar) on the vibration seat vibrates fiercely, when the frequency of vibration seat swing improves gradually, the order of vibrating reed (bar) from grow lack on the vibration seat can vibrate fierceness gradually, continues to improve a hunting frequency of vibrating, and the vibration meeting of the shortest corresponding vibrating reed (bar) is the fiercest.The natural frequency of vibrating reed (bar) that the long-pending but different length of identical material, same cross-sectional is described is all different, have only the external driving frequency of sending when the vibration seat that changes to equate with the natural frequency of the vibrating reed (bar) of a certain length or near the time, resonance effect will take place.A kind of device of realizing above-mentioned resonance effect demenstration method, it is characterized in that it is identical by three materials, sectional area is identical, long vibrating reed 1 different in size, middle vibrating reed 2, short vibrating reed 3 and a vibration seat 4 are formed, wherein: long vibrating reed 1, the one end alignment of middle vibrating reed 2 and short vibrating reed 3, place side by side successively and be fixed on the vibration seat 4, described vibrating reed is a sheet, it also can be elongated strip, but all must have certain rigidity, when no external force is collided is straight and upright, be subjected to external force collision meeting bending slightly, external force promptly recovers straight and upright in case disappear, and generally can select thin plastic sheet for use, foil, paperboard, thin sticking plaster, lightweight materials such as thin metal bar.The material of vibration seat does not limit arbitrarily, can adopt clampings, bonding, welding, rivet with the fixing means of three vibrating reeds.Need only in the presentation process with hand and pinch vibration seat 4 belows, vertical direction both sides swing along the plane that three vibrating reeds 1,2,3 are formed, when hunting frequency is low, long vibrating reed 1 on the vibration seat 4 vibrates fiercely, when the frequency of vibration seat 4 swings improves gradually, vibrating reed 2 on the vibration seat 4 can vibrate fierceness gradually, continues to improve the hunting frequency of vibration seat 4, and the vibration meeting of the shortest corresponding vibrating reed 3 is the fiercest.The natural frequency of vibrating reed (bar) that the long-pending but different length of identical material, same cross-sectional is described is all different, have only the external driving frequency of sending when the vibration seat 4 that changes to equate with the natural frequency of the vibrating reed (bar) of a certain length or near the time, resonance effect will take place.
Good effect of the present invention is the demonstration of the resonance effect of acoustics has been simplified.Use some simple materials, easy method for making, promptly can be made into an experiment effect clearly, resonance effect apparatus for demonstrating very intuitively.To improving the student experimenting manipulative ability, deepen the understanding of the principles of science all is beneficial to.
Description of drawings
Accompanying drawing: resonance effect apparatus for demonstrating structural representation of the present invention.
The meaning that each legend mark respectively is expressed as follows in the accompanying drawing:
The long vibrating reed of 1----; Vibrating reed among the 2----; The short vibrating reed of 3----; 4----vibrates seat.
Embodiment
With accompanying drawing the present invention is further described below in conjunction with the embodiments:
Embodiment (1)
Press resonance effect apparatus for demonstrating of structure fabrication of accompanying drawing: adopt thin plastic sheet as manufacturing materials, the size of long vibrating reed 1 is wide 28mm, long 210mm; The size of middle vibrating reed 2 is wide 28mm, long 153mm; The size of short vibrating reed is wide 28mm, long 110mm.The alignment of one end of these three vibrating reeds is fixed on the vibration seat 4 of wide 25mm, long 130mm that same material makes successively side by side with cementing agent.Hand-held vibration seat 4, the apparatus for demonstrating of swing sheet, can find increase gradually along with hunting frequency, vibrating reed also can be grown the vibration one by one of afterwards lacking earlier, when the hunting frequency of the variation of vibration seat 4 was approaching or equal with the natural frequency of long vibrating reed 1, the fierce resonance effect of vibrating reed 1 vibration just took place; The hunting frequency of vibrating seat 4 continues to increase, when the natural frequency of vibrating reed 2 is approaching or equal in reaching, and the fierce resonance effect of vibrating reed 2 vibrations in just taking place; The hunting frequency of vibration seat 4 continues to increase, the natural frequency that reaches short vibrating reed 3 near or when equal, the fierce resonance effect of short vibrating reed 3 vibrations just takes place.By experiment, also verified the size of frequency and the relation of pendulum length: the natural frequency minimum of long vibrating reed 1, middle vibrating reed 2 takes second place, and short vibrating reed 3 is maximum.
Embodiment (2)
An easy resonance effect apparatus for demonstrating, the material that adopts is that diameter is the finer wire of 0.5mm, the length of long vibrator bar, middle vibrator bar, short vibrator bar is respectively 18mm, 14.5mm, 11.5mm, successively at interval 30mm vertically to follow closely in length be that 120mm, cross section are on the batten of 15mm*15mm.Hand-held batten swing can obtain and the same experiment effect of embodiment (1).
Claims (5)
1. resonance effect demenstration method, it is characterized in that it is identical by several materials, sectional area is identical, vibrating reed different in size or vibrator bar and a vibration seat are formed a resonance effect apparatus for demonstrating, wherein: the end alignment of vibrating reed that several are different in size or vibrator bar, be fixed on side by side successively on the vibration seat, the material capability of described vibrating reed or vibrator bar must have certain rigidity, when no external force is collided is straight and upright, be subjected to external force collision meeting bending slightly, external force promptly recovers straight and upright in case disappear, generally can select thin plastic sheet for use, foil, paperboard, thin sticking plaster, lightweight materials such as thin metal bar, the material of vibration seat does not limit arbitrarily, can adopt clamping with the fixing means of vibrating reed or vibrator bar, bonding, welding, riveted joint, need only in the presentation process with hand and pinch vibration seat below, vertical direction both sides swing along the plane that all vibrating reeds arranged side by side or vibrator bar are formed, when hunting frequency is low, long vibrating reed or vibrator bar on the vibration seat vibrate fiercely, when the frequency of vibration seat swing improves gradually, vibrating reed or the order of vibrator bar from growing to lacking on the vibration seat can vibrate fierceness gradually, continue to improve the hunting frequency of vibration seat, the vibration meeting of the shortest corresponding vibrating reed or vibrator bar is the fiercest, identical material is described, the vibrating reed of the long-pending but different length of same cross-sectional or the natural frequency of vibrator bar are all different, have only the natural frequency of the vibrating reed of the external driving frequency sent when the vibration seat that changes and a certain length or vibrator bar to equate or near the time, resonance effect will take place.
2. device of realizing the described resonance effect demenstration method of claim 1, it is characterized in that it is made up of three long vibrating reeds [1] that material is identical, sectional area is identical, different in size, middle vibrating reed [2], short vibrating reed [3] and a vibration [4], wherein: the end alignment of long vibrating reed [1], middle vibrating reed [2] and short vibrating reed [3] is fixed on the vibration seat [4] successively side by side.
3. resonance effect apparatus for demonstrating according to claim 2 is characterized in that the material of described vibrating reed [1], [2], [3] can be selected thin plastic sheet, foil, paperboard, thin sticking plaster, thin metal bar for use.
4. resonance effect apparatus for demonstrating according to claim 2 is characterized in that the fixing means of described vibrating reed [1], [2], [3] and vibration seat [4] can adopt clamping, bonding, welding, riveted joint.
5. resonance effect apparatus for demonstrating according to claim 2, it is characterized in that described vibrating reed [1], [2], [3] are sheets, it also can be elongated strip, but all must have certain rigidity, when no external force is collided is straight and upright, be subjected to external force collision meeting bending slightly, external force promptly recovers straight and upright in case disappear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100293510A CN101114406A (en) | 2006-07-25 | 2006-07-25 | Demonstration method and apparatus for resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100293510A CN101114406A (en) | 2006-07-25 | 2006-07-25 | Demonstration method and apparatus for resonance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101114406A true CN101114406A (en) | 2008-01-30 |
Family
ID=39022730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100293510A Pending CN101114406A (en) | 2006-07-25 | 2006-07-25 | Demonstration method and apparatus for resonance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101114406A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104732876A (en) * | 2014-12-15 | 2015-06-24 | 深圳清华大学研究院 | Audio resonant marking system and marker thereof |
| CN106124152A (en) * | 2016-08-16 | 2016-11-16 | 安徽新视野科教文化股份有限公司 | A kind of resonance pseudo-experience platform |
| CN112309208A (en) * | 2020-11-17 | 2021-02-02 | 西安理工大学 | Single-degree-of-freedom vibration and resonance demonstration teaching aid |
-
2006
- 2006-07-25 CN CNA2006100293510A patent/CN101114406A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104732876A (en) * | 2014-12-15 | 2015-06-24 | 深圳清华大学研究院 | Audio resonant marking system and marker thereof |
| CN106124152A (en) * | 2016-08-16 | 2016-11-16 | 安徽新视野科教文化股份有限公司 | A kind of resonance pseudo-experience platform |
| CN112309208A (en) * | 2020-11-17 | 2021-02-02 | 西安理工大学 | Single-degree-of-freedom vibration and resonance demonstration teaching aid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101114406A (en) | Demonstration method and apparatus for resonance | |
| CN102868383A (en) | Mems resonator | |
| CN203825904U (en) | Sound phenomenon exploration demonstration instrument | |
| CN203055262U (en) | Moving film bottom type air column resonance and sound velocity measurement teaching demonstration device | |
| CN108471256B (en) | A kind of bimodulus piezoelectricity oscillating generating set | |
| CN201859573U (en) | Teaching aid for demonstrating resonance | |
| CN203825896U (en) | Integrated standing wave demonstration instrument | |
| CN206865734U (en) | Speaker vibration system | |
| CN206434812U (en) | Pronounce Wushu rod | |
| Amorim et al. | A simple experiment to explore standing waves in a flexible corrugated sound tube | |
| CN201413629Y (en) | Special abnormal-shaped curve soundboard frame | |
| CN201222343Y (en) | Bridge case lyre | |
| CN211481166U (en) | Vibration power generation device | |
| CN203883780U (en) | Vibration device and electronic equipment | |
| CN203179496U (en) | Stringed musical instrument bridge | |
| CN206391501U (en) | One kind pronunciation Wushu rod | |
| CN207800117U (en) | A kind of hose type slideway panpipes that can generate tremolo | |
| CN215376912U (en) | Integrated vibrating arm sounding device | |
| CN202650348U (en) | Single pendulum frequency and pendulum length experimental instrument | |
| CN109428511A (en) | A kind of vibrational energy collector of multistage coupled structure | |
| KR101150023B1 (en) | Piezoelectric cantilever fluid energy harvester | |
| CN2651869Y (en) | Demonstration device for forced vibration and resonance-vibration | |
| CN200941258Y (en) | Air transaudient demonstrator | |
| CN110752781A (en) | Dual-purpose piezoelectric generator | |
| CN207867248U (en) | A kind of child's dancing metronome |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |