CN102182657A - Light-heat-sound converting method and device with adjustable frequency and solar power generating unit - Google Patents
Light-heat-sound converting method and device with adjustable frequency and solar power generating unit Download PDFInfo
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- CN102182657A CN102182657A CN2011101006694A CN201110100669A CN102182657A CN 102182657 A CN102182657 A CN 102182657A CN 2011101006694 A CN2011101006694 A CN 2011101006694A CN 201110100669 A CN201110100669 A CN 201110100669A CN 102182657 A CN102182657 A CN 102182657A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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Abstract
The invention relates to a light-heat-sound converting method and device with adjustable frequency; the method comprises the steps of: firstly converging light rays; cutting the converged light rays through a chopper disk; then absorbing the cut light rays by adopting a light-heat converting unit to convert the cut light rays into periodically changed heat energy and to form temperature fluctuation; and transmitting the temperature fluctuation to a working medium near the light-heat converting unit in a sound cavity to generate periodic expansion and compression so as to generate sound pressure. The device comprises a converging lens, the chopper disk, the light-heat converting unit and the sound cavity in sequence; the light-heat converting unit is arranged on the sound cavity; the sound cavity is filled with the working medium; light through holes at the upper part of the converging lens and the chopper disk are in a straight line with the light-heat converting unit; the chopper disk is arranged on a motor shaft; the motor is connected with a motor speed regulator. Furthermore, the light-heat-sound converting device with adjustable frequency can be combined with solar utilization.
Description
Technical field
The present invention relates to a kind of photo-thermal sound conversion method, device and device of solar generating of frequency adjustable.
Background technique
Hot sound converting apparatus be a kind of be the device of acoustic energy with thermal power transfer, in thermoacoustic engine and hot sound refrigerating machine, bringing into play important effect.Hot sound converting apparatus in the hot machine of existing heat sound all is to adopt this core component of regenerator with temperature gradient to realize the conversion of heat sound.Just because of the existence of regenerator, the fluid working substance of reciprocating vibration could be modulated into horizontal heat wave to the axial temperature difference that is added on the solid packing by means of the boundary effect of regenerator minim channel, thereby realizes the heat exchange between temperature fluctuation and the oscillating fluid.Thermodynamic cycle in the regenerator is to be realized by the internal structural characteristic of regenerator self, structure by changing regenerator and working medium type etc. can change the frequency of okperation of the hot machine of heat sound, but operation is comparatively complicated, only be to bring in consideration, fundamentally do not solve problems such as frequency is single, load does not match from output.
Summary of the invention
An object of the present invention is to provide a kind of photo-thermal sound conversion method and device of frequency adjustable, this method and apparatus and traditional heat sound conversion method and device are essentially different, and have frequency adjustable, environmental friendliness, simple advantage; Another purpose provides a kind of device of solar generating that utilizes this device to make.
Technological scheme of the present invention is: a kind of photo-thermal sound conversion method of frequency adjustable, may further comprise the steps: at first with convergence of rays, by chopper disk the light after assembling is cut, adopting the photo-thermal converting unit will cut back light then absorbs, change into periodically variable heat energy, the formation temperature fluctuation, temperature fluctuation passes to the working medium that closes on the photo-thermal converting unit in the operatic tunes, produce periodic the expansion and compression, thereby produce acoustic pressure.
In order to produce resonance with the operatic tunes, make acoustic pressure obtain amplifying, output effect the best can be adjusted the frequency of chopper disk to the light cutting, makes the frequency of described acoustic pressure identical with the natural frequency of the operatic tunes.
A kind of device of photo-thermal sound conversion of frequency adjustable comprises the convergent lens, chopper disk, photo-thermal converting unit and the operatic tunes that set gradually, and the photo-thermal converting unit is installed on the operatic tunes, is filled with working medium in the operatic tunes; The light-passing hole on convergent lens, chopper disk top and photo-thermal converting unit are in line; Described chopper disk is installed on the motor shaft, and motor is connected with machine governor.
Described motor is preferably dc micro-motor, and machine governor is preferably the DC motor speed-regulating device.
For light is effectively assembled, described convergent lens is a Fresnel lens.The Fresnel lens light transmission rate reaches 90%, and the convergence of rays rate is 75～85%, and adopts the PMMA material, and resistance to heat is good.
Described photo-thermal converting unit is the optothermal material that thermal resistance is little, thermal inertia is little, is preferably copper sheet or aluminium flake, and thickness is less than himself thermal diffusion length.When thermal inertia was big, the response time was slow, under the influence of thermal power DC component, can only produce faint even thermal power that can't produce alternation.And the thickness of control copper sheet or aluminium flake is in order to reduce the influence of thermal inertia, when thickness during less than himself thermal diffusion length, even can ignore the influence of thermal inertia.
Simultaneously, in order to strengthen absorptivity, the surface scribbles the coating of high light coefficient of adsorption, specifically can adopt neutral carbon pen with surperficial blacking.
Described working medium is preferably air, helium, neon or argon gas, more preferably air or helium.
The described operatic tunes is made by the material of thermal insulation, generally is cylindrical.In order to obtain bigger output acoustic pressure, the described operatic tunes is made of two heimholtz resonators of coupling.
Light source of the present invention can directly adopt sunlight, also light source such as PAR lamp.
The invention allows for a kind of device of solar generating, this device is made up of the photo-thermal sound converting apparatus and the acoustic-electric converting unit of frequency adjustable, and the acoustic-electric converting unit is arranged on the cavity of the operatic tunes.The acoustic-electric converting unit is preferably electromagnetic transduction, piezoelectric transducer or electrostatic transducer.
The invention has the beneficial effects as follows: the photo-thermal sound conversion method of frequency adjustable provided by the invention, heat energy with transform light energy is driving heat source, reach required frequency of okperation by active adjustment input end frequency, solved fundamentally that frequency is single, the unmatched problem of load, operation is simple; The photo-thermal sound converting apparatus of frequency adjustable provided by the invention has frequency adjustable, environmental friendliness and advantage of simple structure, can combine with the solar energy utilization, it is the exploration of the new mode of solar energy utilization, for the improvement of the hot machine structure of heat sound provides new thinking, at the hot machine of heat sound, thermoacoustic refrigeration, utilization of new energy resources and exploitation, fields such as Aero-Space have a wide range of applications.
Description of drawings
Fig. 1 is the photo-thermal sound converting apparatus structural representation of frequency adjustable of the present invention.
Fig. 2 is a frequency modulation device structural representation of the present invention.
Fig. 3 is a chopper disk structural representation of the present invention.
Fig. 4 is a chopper disk structural representation of the present invention.
Fig. 5 is the device of solar generating structural representation.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
As illustrated in fig. 1 and 2, a kind of photo-thermal sound converting apparatus of frequency adjustable comprises light source 1, Fresnel lens 2, frequency modulation device 4, photo-thermal converting unit 5 and the operatic tunes 6.Wherein, photo-thermal converting unit 5 is an aluminium flake, and aluminium flake is simultaneously used neutral carbon pen blacking towards light source; The operatic tunes 6 is the helmholtz resonance formula operatic tunes, is made of the heimholtz resonator with public acoustical mass of two couplings, is full of helium in the operatic tunes 6, and photo-thermal converting unit 5 is arranged on the operatic tunes 6.Frequency modulation device 4 comprises that DC motor speed-regulating device 7, direct current generator 9 and edge have the chopper disk 11 of light-passing hole 12, and DC motor speed-regulating device 7 is connected with direct current generator 9 by lead 8, and chopper disk 11 is installed on 9 in the direct current generator by flange 10.
Described light source 1, Fresnel lens 2, frequency modulation device 4 and the operatic tunes 6 are installed on the bearing 3, the light-passing hole 12 that light passes Fresnel lens 2 and chopper disk 11 tops successively is radiated on the photo-thermal converting unit 5, photo-thermal converting unit 5 is positioned at Fresnel lens 2 focus places, and the center line of chopper disk 11 top light-passing holes 12, the center of Fresnel lens 2 focuses and the center line of the operatic tunes 6 are positioned on the same axis.
In addition, different according to the size of light-passing hole 12 on the chopper disk 11 and shape can be made into multi-form chopper disk, shown in Fig. 3 and 4.Among Fig. 3, the chopper disk 11 peripheral equal angles circular light-passing hole 12 that distributing uniformly, the time that light source is cut off is greater than the time of passing through; Among Fig. 4, chopper disk 11 first-class even angle are distributed with fan-shaped light-passing hole 12, light source be cut off with the time of passing through be identical.Difform chopper disk has been equivalent to provide different input patterns.
Describe below in conjunction with the photo-thermal sound conversion method of device frequency adjustable of the present invention:
(1) light source 1 is the PAR lamp in the present embodiment, and the PAR lamp sends a branch of parallel light beam, and 11 pairs of parallel light beams after Fresnel lens 2 is assembled of chopper disk cut, and form periodically variable hot spot;
(2) utilize photo-thermal effect, photo-thermal converting unit 5 absorbs periodically variable hot spot and converts periodically variable heat energy to, the formation temperature fluctuation, and temperature fluctuation passes to the thin layer helium that closes on photo-thermal converting unit 5 in the operatic tunes;
(3) thin layer helium (being called the helium in the available heat delivery areas again) produces periodic the expansion and compression (being similar to vibration type piston), thereby in the operatic tunes 6, produce acoustic pressure, the frequency of acoustic pressure is consistent with the modulation frequency of frequency modulation device 4, the modulation frequency of frequency modulation device 4 is the product of light-passing hole number m on motor speed n and the chopper disk, be f=n*m;
(5) change the rotating speed of direct current generator 9 or select for use the different chopper disk of light-passing hole number 11 to regulate the acoustic pressure frequency by DC motor speed-regulating device 7, when the natural frequency of the acoustic pressure frequency that produces and the operatic tunes 6 is identical, produce resonance, acoustic pressure obtains amplifying output effect the best.
As shown in Figure 5, device of solar generating, this device is made up of the photo-thermal sound converting apparatus and the acoustic-electric converting unit 15 of frequency adjustable, and the basic structure of the photo-thermal sound converting apparatus of frequency adjustable is identical with embodiment 1, and difference is to be light source with the sunlight.Acoustic-electric converting unit 15 specifically can adopt electromagnetic transduction, piezoelectric transducer or electrostatic transducer, adopts piezoelectric transducer in the present embodiment, and is arranged on the cavity of the operatic tunes 6 with the form of matrix.
At first the hot sound converting apparatus of frequency adjustable is handled the solar energy in the environment, is translated into useful acoustic energy, realizes the conversion of acoustic energy to electric energy through acoustic-electric converting unit 15 again.The form of each acoustic-electric converting unit 15 with matrix combined, can strengthen electromotive power output.
Claims (10)
1. the photo-thermal sound conversion method of a frequency adjustable, it is characterized in that may further comprise the steps: at first with convergence of rays, by chopper disk the light after assembling is cut, adopting the photo-thermal converting unit will cut back light then absorbs, change into periodically variable heat energy, the formation temperature fluctuation, temperature fluctuation passes to the working medium that closes on the photo-thermal converting unit in the operatic tunes, produce periodic the expansion and compression, thereby produce acoustic pressure.
2. by the photo-thermal sound conversion method of the described frequency adjustable of claim 1, it is characterized in that: the frequency of described acoustic pressure is identical with the natural frequency of the operatic tunes.
3. realize the device of claim 1 or 2 described methods, it is characterized in that: comprise the convergent lens, chopper disk, photo-thermal converting unit and the operatic tunes that set gradually, the photo-thermal converting unit is installed on the operatic tunes, is filled with working medium in the operatic tunes; The light-passing hole on convergent lens, chopper disk top and photo-thermal converting unit are in line; Described chopper disk is installed on the motor shaft, and motor is connected with machine governor.
4. by the photo-thermal sound converting apparatus of the described frequency adjustable of claim 3, it is characterized in that: described photo-thermal converting unit is copper sheet or aluminium flake, and thickness is less than the thermal diffusion length of himself.
5. by the photo-thermal sound converting apparatus of the described frequency adjustable of claim 4, it is characterized in that: described copper sheet or aluminium flake surface scribble the coating of high light coefficient of adsorption.
6. by the photo-thermal sound converting apparatus of claim 3 or 4 or 5 described frequency adjustable, it is characterized in that: described working medium is air, helium, neon or argon gas.
7. by the photo-thermal sound converting apparatus of claim 3 or 4 or 5 described frequency adjustable, it is characterized in that: described convergent lens is a Fresnel lens.
8. by the photo-thermal sound converting apparatus of claim 3 or 4 or 5 described frequency adjustable, it is characterized in that: the described operatic tunes is made of two heimholtz resonators of coupling.
9. the device of solar generating that utilizes the photo-thermal sound converting apparatus of the described frequency adjustable of claim 3～8 to make, it is characterized in that: photo-thermal sound converting apparatus and acoustic-electric converting unit by frequency adjustable are formed, and the acoustic-electric converting unit is arranged on the cavity of the operatic tunes.
10. by the described device of solar generating of claim 9, it is characterized in that: described acoustic-electric converting unit is electromagnetic transduction, piezoelectric transducer or electrostatic transducer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101006694A CN102182657A (en) | 2011-04-21 | 2011-04-21 | Light-heat-sound converting method and device with adjustable frequency and solar power generating unit |
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| CN2011101006694A CN102182657A (en) | 2011-04-21 | 2011-04-21 | Light-heat-sound converting method and device with adjustable frequency and solar power generating unit |
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| CN2011101006694A Pending CN102182657A (en) | 2011-04-21 | 2011-04-21 | Light-heat-sound converting method and device with adjustable frequency and solar power generating unit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751911A (en) * | 2012-07-13 | 2012-10-24 | 东南大学 | Focused type thermoelectric conversion device |
| CN103401472A (en) * | 2013-08-05 | 2013-11-20 | 内蒙古金岗重工有限公司 | Solar power thermoacoustic piezoelectric power generation system and power generation method thereof |
| CN107395068A (en) * | 2017-07-21 | 2017-11-24 | 东南大学 | A kind of device of solar generating based on phase regulation and control |
| CN112798554A (en) * | 2020-12-25 | 2021-05-14 | 绵阳同成智能装备股份有限公司 | Paper quantitative moisture detection system based on infrared technology |
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| US6442937B1 (en) * | 2001-08-21 | 2002-09-03 | The Boeing Company | Solar receiver adaptive tracking control |
| US20070062195A1 (en) * | 2005-09-21 | 2007-03-22 | Nalin Walpita | Solar heat engine system |
| CN101344077A (en) * | 2008-04-25 | 2009-01-14 | 浙江大学 | Thermo-acoustic power generation method and system with solar energy as driving source |
| CN101629558A (en) * | 2009-08-11 | 2010-01-20 | 深圳市中科力函热声技术工程研究中心有限公司 | Solar thermoacoustic power generation system |
-
2011
- 2011-04-21 CN CN2011101006694A patent/CN102182657A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6442937B1 (en) * | 2001-08-21 | 2002-09-03 | The Boeing Company | Solar receiver adaptive tracking control |
| US20070062195A1 (en) * | 2005-09-21 | 2007-03-22 | Nalin Walpita | Solar heat engine system |
| CN101344077A (en) * | 2008-04-25 | 2009-01-14 | 浙江大学 | Thermo-acoustic power generation method and system with solar energy as driving source |
| CN101629558A (en) * | 2009-08-11 | 2010-01-20 | 深圳市中科力函热声技术工程研究中心有限公司 | Solar thermoacoustic power generation system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751911A (en) * | 2012-07-13 | 2012-10-24 | 东南大学 | Focused type thermoelectric conversion device |
| CN103401472A (en) * | 2013-08-05 | 2013-11-20 | 内蒙古金岗重工有限公司 | Solar power thermoacoustic piezoelectric power generation system and power generation method thereof |
| CN107395068A (en) * | 2017-07-21 | 2017-11-24 | 东南大学 | A kind of device of solar generating based on phase regulation and control |
| CN112798554A (en) * | 2020-12-25 | 2021-05-14 | 绵阳同成智能装备股份有限公司 | Paper quantitative moisture detection system based on infrared technology |
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Application publication date: 20110914 |