CN202282092U - Acoustic levitation and velocity measuring experimental instrument - Google Patents
Acoustic levitation and velocity measuring experimental instrument Download PDFInfo
- Publication number
- CN202282092U CN202282092U CN 201120413154 CN201120413154U CN202282092U CN 202282092 U CN202282092 U CN 202282092U CN 201120413154 CN201120413154 CN 201120413154 CN 201120413154 U CN201120413154 U CN 201120413154U CN 202282092 U CN202282092 U CN 202282092U
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- sound velocity
- velocity determination
- acoustic
- acoustic levitation
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Abstract
The utility model discloses an acoustic levitation and velocity measuring experimental instrument. The experimental instrument comprises an acoustic velocity measuring combination instrument, and is characterized in that the acoustic velocity measuring combination instrument is connected with both a signal source device and an electroacoustic transducer, and a matched concave reflection terminal is arranged at the corresponding end of the electroacoustic transducer. In the utility model, the designed signal source device has more complete functions and is more convenient to use, the acoustic velocities of different media can be measured by adopting various methods, and the acoustic levitation phenomenon can be demonstrated through the electroacoustic transducer and the concave reflection terminal.
Description
Technical field
The utility model relates to the Physical Experiment measuring instrument, specifically, relates to a kind of acoustic levitation and sound velocity determination experiment instrument.
Background technology
The measurement of the velocity of sound is a very important comprehensive experiment in the Experiment of College Physics; At present; Instrument acoustic levitation is demonstrated and sound velocity determination is combined does not also appear on the market; And the independent price of two instruments takies a large amount of scientific research funds all than higher, and this is the weak point of prior art.
Summary of the invention
The technical matters that the utility model will solve provides a kind of acoustic levitation and sound velocity determination experiment instrument, has realized the combination of acoustic levitation experimental demonstration and velocity of sound determination experiment.
The utility model adopts following technological means to realize goal of the invention:
A kind of acoustic levitation and sound velocity determination experiment instrument; Comprise sound velocity determination combination appearance; It is characterized in that: said sound velocity determination combination appearance connects signal source device, and said sound velocity determination combination appearance also connects electroacoustics transducer, and said electroacoustics transducer corresponding end is provided with the concave reflection end that matches.
As the further qualification to the present technique scheme, said signal source device comprises transformer and Voltage stabilizing module, waveform generator, power amplifier module, heat abstractor.
As the further qualification to the present technique scheme, said waveform generator comprises that Voltage stabilizing module, waveform generating module, frequency amplification module, waveform accept module, display module.
Compared with prior art; The advantage and the good effect of the utility model are: the signal source device more perfect function of the utility model design; Use convenient; Not only realized the velocity of sound of several different methods measurement different medium, electroacoustics transducer capable of using again and concave reflection end demonstration acoustic levitation phenomenon; Suspension stability is strong, adopts the concave reflection end, has improved the stability that suspends greatly, not only can be used for the suspension of bead, can also realize the suspension of a plurality of beads; Can realize that live body suspends, the experiment instrument of design can also fetter biological living in air, for the research of life science under the floating condition provides experiment porch; Realized the suspension of ant, the signal source of the simple and convenient making of experimental implementation can produce stable frequency, but and in accuracy rating fine adjustments; The sine wave signal amplitude of output inputs to electroacoustics transducer through amplifying, and makes the suffered sound radiation pressure pa of body surface bigger, and experiment suspends more easily; The opening signal source switch, the fine setting frequency can realize suspending, and has realized the simple and fast of acoustic levitation operation; Cost of manufacture is low, and suspension time is long.
Description of drawings
Fig. 1 is the structural representation of the utility model preferred embodiment.
Fig. 2 accepts module principle figure for the utility model preferred embodiment waveform.
Fig. 3 is the utility model preferred embodiment transformer principle figure.
Fig. 4 is the utility model preferred embodiment Voltage stabilizing module schematic diagram.
Fig. 5 is the power amplifier module schematic diagram of the utility model preferred embodiment.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the utility model is made detailed description further.
The utility model comprises sound velocity determination combination appearance, signal source device, electroacoustics transducer, concave reflection end.Said sound velocity determination combination appearance connects signal source device, and said sound velocity determination combination appearance also connects electroacoustics transducer, and said electroacoustics transducer corresponding end is provided with the concave reflection end that matches.
Said signal source device comprises transformer and Voltage stabilizing module, waveform generator, power amplifier module, heat abstractor.
Said waveform generator comprises that Voltage stabilizing module, waveform generating module, frequency amplification module, waveform accept module, display module.
Waveform generating module: use chip XR2206CP.This chip is the function signal generator with integrated circuit, can produce high-quality sine wave, triangular wave and pulsating wave, has high stability and accuracy.Frequency-tuning range is 1hz to 1Mhz.Used the potentiometer of WH5-1A 6K8 for the adjusting of frequency, can realize the adjusting of 1hz unit, made and regulate easily.Meet this works designing requirement, cost performance is high.
Frequency amplification module: use chip NE5532P.It is a kind of double operational high-performance low-noise operational amplifier, and the most standard of comparing operational amplifier can demonstrate better noiseproof feature, improves output driving force and quite high small-signal and power supply bandwidth.
The waveform receiver module: this signal source comprises four interfaces: connect transducer and waveform (transmitting terminal), transducer and waveform (receiving end).
Display module: used charactron LG8012BH and chip SN74HC164N.Charactron is big and display effect is good, can show five digit number, and is very convenient for reading.
Transformer and Voltage stabilizing module: used L7805, L7808,7908 and the LM2596 chip in these works.This module directly becomes stable experiment required voltage with daily interchange 220v voltage.For example alternating current 220V voltage obtains exchanging 9V after inserting transformer, obtains direct current 5V through chip L7805 again.
Power amplifier module: use chip LM1875, LM1875 is a audio frequency power amplifier electricity integrated circuit that National Semiconductor releases the early 1990s, adopts T0-220 encapsulation peripheral cell few, but excellent performance, have frequency response wide with characteristics such as speed is fast.These chip two ends can load maximum voltage and reach ± 30V, can produce the power of 30W.Can the peak-to-peak value of output signal be increased to 40V, meet the designing requirement of these works greatly.
Heat abstractor: the radiator fan of working voltage 12V power 2.4W, use two these signal fans to be added in the rear portion of signal source enclosure.For the heat radiation of waveform generator and Voltage stabilizing module, the heat radiator of utilization 20mm*20mm*35mm specification.Its radiating effect is desirable, can carry out acoustic levitation demonstration and sound velocity determination experiment for a long time.
The acoustic levitation lecture experiment adopts the Monoaxial type acoustic suspension experimental provision, and required accessory has electroacoustics transducer and concave reflection end.Transducer adopts the piezoelectric ceramic type transducer, and its function is the acoustical signal that becomes the electrical signal conversion of certain frequency same frequency, perhaps converts the acoustical signal of certain frequency to the electric signal of same frequency.For the concave reflection end, we adopt the bottle end (aluminum) of easy open can beverage, can extraordinaryly satisfy requirement of experiment.This is both made full use of the rubbish of making in the life, realized extraordinary experiment effect again.Both greatly reduced the cost of experiment, improved the stability that suspends again, made that on the basis of sound velocity determination, Acoustic suspension phenomenon also can be promoted in the laboratory.
Claims (3)
1. acoustic levitation and sound velocity determination experiment instrument; Comprise sound velocity determination combination appearance; It is characterized in that: said sound velocity determination combination appearance connects signal source device, and said sound velocity determination combination appearance also connects electroacoustics transducer, and said electroacoustics transducer corresponding end is provided with the concave reflection end that matches.
2. according to said acoustic levitation of claim 1 and sound velocity determination experiment instrument, it is characterized in that: said signal source device comprises transformer and Voltage stabilizing module, waveform generator, power amplifier module, radiating module.
3. according to said acoustic levitation of claim 2 and sound velocity determination experiment instrument, it is characterized in that: said waveform generator comprises that waveform generating module, frequency amplification module, waveform accept module, display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120413154 CN202282092U (en) | 2011-10-26 | 2011-10-26 | Acoustic levitation and velocity measuring experimental instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120413154 CN202282092U (en) | 2011-10-26 | 2011-10-26 | Acoustic levitation and velocity measuring experimental instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282092U true CN202282092U (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120413154 Expired - Fee Related CN202282092U (en) | 2011-10-26 | 2011-10-26 | Acoustic levitation and velocity measuring experimental instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202282092U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118593A (en) * | 2019-05-23 | 2019-08-13 | 浙江大学 | A kind of novel laboratory acoustic velocity measurement device |
| CN118586447A (en) * | 2024-08-05 | 2024-09-03 | 中国海洋大学 | Sound velocity profile long-term prediction method based on transducer |
-
2011
- 2011-10-26 CN CN 201120413154 patent/CN202282092U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118593A (en) * | 2019-05-23 | 2019-08-13 | 浙江大学 | A kind of novel laboratory acoustic velocity measurement device |
| CN118586447A (en) * | 2024-08-05 | 2024-09-03 | 中国海洋大学 | Sound velocity profile long-term prediction method based on transducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20131026 |