CN102394064B - Combined type plant audio frequency regulation and control method - Google Patents
Combined type plant audio frequency regulation and control method Download PDFInfo
- Publication number
- CN102394064B CN102394064B CN2011102520632A CN201110252063A CN102394064B CN 102394064 B CN102394064 B CN 102394064B CN 2011102520632 A CN2011102520632 A CN 2011102520632A CN 201110252063 A CN201110252063 A CN 201110252063A CN 102394064 B CN102394064 B CN 102394064B
- Authority
- CN
- China
- Prior art keywords
- frequency
- audio
- audio frequency
- combined type
- signal
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000009826 distribution Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 230000004044 response Effects 0.000 claims abstract description 6
- 238000004458 analytical method Methods 0.000 claims description 20
- 230000005236 sound signal Effects 0.000 claims description 19
- 230000009466 transformation Effects 0.000 claims description 16
- 230000008635 plant growth Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 8
- 238000012937 correction Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 206010049669 Dyscalculia Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000009975 flexible effect Effects 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 230000014616 translation Effects 0.000 description 1
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a combined type plant audio frequency regulation and control method. The method comprises the following steps: 1) a combined type audio frequency loaded in a regulation and control environment is tested and analyzed for frequency response, and the sound pressure distributions of the combined audio frequency at different frequency points or frequency bands are confirmed; 2) wavelet comparison is conducted on the wavelet transform results of discrete combined audio frequency signals and expected output combined audio frequency signals, and the differences of the wavelet transform results of the discrete combined audio frequency signals and the expected output combined audio frequency signals at the frequency points or the octave frequency bands are acquired according to the wavelet comparison results of the sound pressure distributions at the frequency points or the frequency bands; and 3) according to the differences of the wavelet transform results of the discrete combined audio frequency signals and the expected output combined audio frequency signals at the frequency points or the octave frequency bands, the output voltages of a sound generator at the frequency points or the octave frequency bands are corrected, so that the sound pressures at the frequency points or the frequency bands of the combined type audio frequency can meet the requirements set by a plant audio frequency test. The method achieves the accurate sound energy distributions at the frequency points or the frequency bands of the combined type audio frequency in the sound wave regulation and control environment, and reduces the influence on audio frequency output from the poor frequency response effect of a loudspeaker or the reciprocating reflection of sound waves and material absorption in a facility environment.
Description
Technical field
The present invention relates to the audio frequency regulate and control method, relate in particular to a kind of Combined type plant audio frequency regulate and control method.
Background technology
The audio frequency control technique as one of a kind of emerging modern physics agricultural high-tech, is mainly by the regulation and control to sound wave in biological growthing environment, realizes the high yield and high quality of agricultural product.There are some researches show, different frequencies and the sound wave of intensity are different to the facilitation effect of plant growth.Sound wave depends on control methods to the audio frequency in environment to the short long-acting fruit keys of crops.
The frequency of sound wave and corresponding audio frequency intensity are the key factors of the acoustic wave-fostered effect of impact, therefore, at the modern physics Application in agriculture, in realization loading combination audio frequency, the accuracy of each Frequency point or frequency band intensity of acoustic wave is necessary for the audio plant control technique.But, present existing audio plant regulate and control method adopts the mode of open loop, namely export to acoustical generator (audio amplifier) with certain audio files of determining as sound source, but when adopting the short long technology of audio frequency in the protected crop cultivating chamber, come back reflective, facility material on the impacts such as absorption of different audio frequencies due to environmental facility on sound, make actual audio-frequency information degree of distortion larger, cause the combination audio frequency of loading to differ larger with original combination audio frequency of wishing, this affects audio frequency to a certain extent to the short long-acting fruit of crop.
Fast Fourier Transform (FFT) is a kind of fast algorithm of discrete Fourier transformation, and it can overcome the dyscalculia of mutually changing between time domain and frequency field.Adopting this algorithm to carry out discrete Fourier transformation greatly reduces than its needed multiplication number of times of traditional algorithm, particularly when the number of sampling points N that is transformed is a lot, the saving of fft algorithm calculated amount is just more remarkable, and this makes the method become possibility to the application in the embedded microprocessing systems equipment of internal memory space sensitive.And wavelet transformation has good localization performance simultaneously in time domain and frequency domain, the T/F window that a flexibility and changeability is arranged, than Fourier transform, windowing Fourier transform, the more effective information extraction from signal of its energy, by calculation functions such as flexible and translations, function or signal are carried out multiscale analysis, solved the indeterminable problem of many Fourier transforms; It is a kind of signal analysis instrument that development produces on the basis of Fourier analysis, namely has advantages of Fourier analysis, such as analyzing in frequency field, it has also overcome the deficiency of Fourier analysis simultaneously, function with partial analysis, it can first be analyzed echo signal on the whole, then the local detail information of evaluating objects signal.Be subjected to the impact of plant growth environment, to the general more complicated of analysis of the combined type audio-frequency information that loads in environment, wherein the audio signal analytical approach plays a key effect for the regulating effect of audio plant.Therefore, the analysis means that the present invention adopts Fast Fourier Transform (FFT) and wavelet transformation to combine provides a kind of Combined type plant audio frequency regulate and control method.
Summary of the invention
The objective of the invention is provides a kind of Combined type plant audio frequency regulate and control method by overcoming the deficiencies in the prior art.
The technical solution adopted in the present invention comprises following steps:
The step of Combined type plant audio frequency regulate and control method is as follows:
1) the combined type audio frequency that loads in test regulation and control environment carries out frequency-response analysis to it, determines that the combination audio frequency distributes in the acoustic pressure of each Frequency point or frequency band;
2) the discrete combination audio signal being carried out the result of wavelet transformation and the combination audio signal of desired output compares as small echo, according to the result that the acoustic pressure of each Frequency point or frequency band distributes and compares as small echo with the sound pressure signal of the required audio frequency combination of Promoting plant growth, obtain both poor on each Frequency point or octave band;
3) poor on each Frequency point or octave band according to both, revise sonic generator at the output voltage of each Frequency point or octave band, make each Frequency point of combined type audio frequency in audio plant regulation and control environment or the distribution of frequency band acoustic pressure reach the determined requirement of audio plant test.
Described step 1) is: first utilize the combination audio frequency simulating signal in sound pressure sensor herborization growing environment; The combination audio frequency simulating signal that then will collect is carried out A/D and is converted to digital discrete signal; Again digitized discrete combination audio signal is carried out wavelet transformation and obtain making up audio frequency in the acoustic pressure distribution of each Frequency point or frequency band.
described step 3) is: according to the result of small echo comparison, if the energy distribution of collection signal and desired output signal is complementary, change audio plant signals collecting and the wavelet analysis of next round over to after 2s, if do not mate, the discrete combination audio signal that collects is done Fast Fourier Transform (FFT), then each frequency component in transformation results being made weighted correction processes, change audio plant signals collecting and the wavelet analysis of next round after time-delay 2s over to, by adjusting the voltage amplitude component of each frequency or frequency band output, the acoustic pressure correction of realization to each Frequency point, so circulation, thus guaranteed that each Frequency point of combination audio frequency of loading or frequency band energy distribute in facilities environment evenly, realize each Frequency point of the combined type audio frequency in plant growth environment or the regulation and control of frequency band energy.
The beneficial effect that the present invention compared with prior art has:
1) the present invention has realized in the regulation and control environment the accurate distribution of each Frequency point in the combined type audio frequency or frequency band acoustic energy;
2) the present invention has reduced due to the impact of loudspeaker frequency response poor effect on audio frequency regulation and control output;
3) the present invention has reduced to absorb due to come back reflective and the material of sound wave in facilities environment the impact that brings to loading audio frequency output.
Description of drawings
Fig. 1 is the Technology Roadmap of Combined type plant audio frequency regulate and control method;
Fig. 2 is analysis and the processing flow chart of Combined type plant audio frequency characteristic.
Embodiment
The step of Combined type plant audio frequency regulate and control method is as follows:
1) the combined type audio frequency that loads in test regulation and control environment carries out frequency-response analysis to it, determines that the combination audio frequency distributes in the acoustic pressure of each Frequency point or frequency band;
2) the discrete combination audio signal being carried out the result of wavelet transformation and the combination audio signal of desired output compares as small echo, according to the result that the acoustic pressure of each Frequency point or frequency band distributes and compares as small echo with the sound pressure signal of the required audio frequency combination of Promoting plant growth, obtain both poor on each Frequency point or octave band;
3) poor on each Frequency point or octave band according to both, revise sonic generator at the output voltage of each Frequency point or octave band, make each Frequency point of combined type audio frequency in audio plant regulation and control environment or the distribution of frequency band acoustic pressure reach the determined requirement of audio plant test.
Described step 1) is: first utilize the combination audio frequency simulating signal in sound pressure sensor herborization growing environment; The combination audio frequency simulating signal that then will collect is carried out A/D and is converted to digital discrete signal; Again digitized discrete combination audio signal is carried out wavelet transformation and obtain making up audio frequency in the acoustic pressure distribution of each Frequency point or frequency band.
described step 3) is: according to the result of small echo comparison, if the energy distribution of collection signal and desired output signal is complementary, change audio plant signals collecting and the wavelet analysis of next round over to after 2s, if do not mate, the discrete combination audio signal that collects is done Fast Fourier Transform (FFT), then each frequency component in transformation results being made weighted correction processes, change audio plant signals collecting and the wavelet analysis of next round after time-delay 2s over to, by adjusting the voltage amplitude component of each frequency or frequency band output, the acoustic pressure correction of realization to each Frequency point, so circulation, thus guaranteed that each Frequency point of combination audio frequency of loading or frequency band energy distribute in facilities environment evenly, realize each Frequency point of the combined type audio frequency in plant growth environment or the regulation and control of frequency band energy.
Embodiment
The present embodiment is to carry out in a volume is the growth cabinet of 600 liters, take the combined type audio frequency that loads 1100HZ, 2200HZ, 3300HZ in this climate box as example, realize that this combined type audio frequency is 90dB in 1100HZ, 2200HZ, three frequencies of 3300HZ in the acoustic pressure at place, casing centre position.
as depicted in figs. 1 and 2, the implementation process of the present embodiment is as follows: in the loudspeaker of the combined type audio signal of exporting 1100HZ, 2200HZ, 3300HZ by sonic generator in the casing, utilization is installed on the sound pressure sensor of locating in the middle of casing and gathers the interior combination audio frequency simulating signal that is loaded of climate box, the combination audio frequency simulating signal that then will collect is carried out A/D and is converted to digital discrete signal, again digitized discrete combination audio signal is carried out wavelet transformation and obtain making up audio frequency in the acoustic pressure distribution of 1100HZ, 2200HZ, three Frequency points of 3300HZ, the frequency that the discrete combination audio signal that collects is carried out the result of wavelet transformation and desired output is that the audio signal that 1100HZ, 2200HZ, 3300HZ and acoustic pressure are 90dB is compared as small echo, obtains both poor at 1100HZ, 2200HZ, three Frequency points of 3300HZ, result according to the small echo comparison, if collection signal is frequency is 1100HZ, 2200HZ, 3300HZ and acoustic pressure are the combined type audio signal of 90dB, change audio plant signals collecting and the wavelet analysis of next round over to after 2s, otherwise just the discrete combination audio signal that collects is done Fast Fourier Transform (FFT), then with the 1100HZ in transformation results, 2200HZ, three frequency components of 3300HZ are made weighted correction and are processed, change audio plant signals collecting and the wavelet analysis of next round after time-delay 2s over to, by adjusting the voltage amplitude component of each frequency or frequency band output, the acoustic pressure correction of realization to each Frequency point, so circulation, thereby guaranteed the combination audio frequency that loads in the climate box 1100HZ, 2200HZ, three Frequency points of 3300HZ in casing same position place energy distribution evenly, realize in this example of plant growth environment being each Frequency point of the combined type audio frequency in climate box or the regulation and control of frequency band energy.
Claims (3)
1. Combined type plant audio frequency regulate and control method is characterized in that its step is as follows:
What 1) load in test regulation and control environment is the single-frequency pure tone sinusoidal signal combined type audio frequency of 1100HZ, 2200HZ, 3300HZ by frequency, and it is carried out frequency-response analysis, determines that the combination audio frequency distributes in the acoustic pressure of each Frequency point or frequency band;
2) the discrete combination audio signal is carried out the result of wavelet transformation and desired output be 1100HZ, 2200HZ, 3300HZ by frequency single-frequency pure tone sinusoidal signal combination audio signal is compared as small echo, according to the result that the acoustic pressure of each Frequency point or frequency band distributes and compares as small echo with the sound pressure signal of the required audio frequency combination of Promoting plant growth, obtain both poor on each Frequency point or octave band;
3) poor on each Frequency point or octave band according to both are revised sonic generator at the output voltage of each Frequency point or octave band, make each Frequency point of combined type audio frequency in audio plant regulation and control environment reach the determined requirement of audio plant test.
2. a kind of Combined type plant audio frequency regulate and control method according to claim 1, it is characterized in that: described step 1) is: first utilize the combination audio frequency simulating signal in sound pressure sensor herborization growing environment; The combination audio frequency simulating signal that then will collect is carried out A/D and is converted to digital discrete signal; Again digitized discrete combination audio signal is carried out wavelet transformation and obtain making up audio frequency at each Frequency point.
3. a kind of Combined type plant audio frequency regulate and control method according to claim 1, it is characterized in that: described step 3) is: according to the result of small echo comparison, if the energy distribution of collection signal and desired output signal is complementary, change audio plant signals collecting and the wavelet analysis of next round over to after 2s, if do not mate, the discrete combination audio signal that collects is done Fast Fourier Transform (FFT), then each frequency component in transformation results being made weighted correction processes, change audio plant signals collecting and the wavelet analysis of next round after time-delay 2s over to, by adjusting the voltage amplitude component of each frequency or frequency band output, the acoustic pressure correction of realization to each Frequency point, so circulation, thus guaranteed that each Frequency point of combination audio frequency of loading or frequency band energy distribute in facilities environment evenly, realize the regulation and control to each Frequency point of the combined type audio frequency in plant growth environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102520632A CN102394064B (en) | 2011-08-30 | 2011-08-30 | Combined type plant audio frequency regulation and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102520632A CN102394064B (en) | 2011-08-30 | 2011-08-30 | Combined type plant audio frequency regulation and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102394064A CN102394064A (en) | 2012-03-28 |
| CN102394064B true CN102394064B (en) | 2013-06-05 |
Family
ID=45861362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102520632A Expired - Fee Related CN102394064B (en) | 2011-08-30 | 2011-08-30 | Combined type plant audio frequency regulation and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102394064B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103034620A (en) * | 2012-11-30 | 2013-04-10 | 河南工业大学 | Frequency-domain characteristic analyzing method of excited BPE (Biophoton Emission) signal of wheat grain |
| WO2020039434A1 (en) * | 2018-08-20 | 2020-02-27 | Ramot At Tel-Aviv University Ltd., | Plant-monitor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201541507U (en) * | 2009-06-01 | 2010-08-11 | 青岛高鑫物理农业科技有限公司 | Plant acoustic frequency generator |
| CN102144757A (en) * | 2011-01-11 | 2011-08-10 | 浙江大学 | Bean sprout production method based on audio-frequency control technology |
| EP2359678A1 (en) * | 2008-12-05 | 2011-08-24 | National University Corporation Saitama University | Method for evaluating healthiness of vascular plants, method for watering vascular plants, film-shaped electret sensor, and film-like ecm array |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4218824B2 (en) * | 2002-11-13 | 2009-02-04 | 隆之 大河内 | Method for detecting annual ring location and measuring annual ring width of wood |
-
2011
- 2011-08-30 CN CN2011102520632A patent/CN102394064B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2359678A1 (en) * | 2008-12-05 | 2011-08-24 | National University Corporation Saitama University | Method for evaluating healthiness of vascular plants, method for watering vascular plants, film-shaped electret sensor, and film-like ecm array |
| CN201541507U (en) * | 2009-06-01 | 2010-08-11 | 青岛高鑫物理农业科技有限公司 | Plant acoustic frequency generator |
| CN102144757A (en) * | 2011-01-11 | 2011-08-10 | 浙江大学 | Bean sprout production method based on audio-frequency control technology |
Non-Patent Citations (6)
| Title |
|---|
| 侯天侦等.植物声频控制技术在设施蔬菜生产中的应用.《农业工程学报》.2009,第25卷(第2期),第156-160页. |
| 声频对豇豆生长和结实的影响;姜仕仁等;《浙江科技学院学报》;20100228;第22卷(第1期);第8-11页 * |
| 姜仕仁等.声频对豇豆生长和结实的影响.《浙江科技学院学报》.2010,第22卷(第1期),第8-11页. |
| 柏明娥.虫鸣和音乐声频对六种蔬菜生长的影响试验.《安徽农业科学》.2010,第16卷(第38期),第8365-8369页. |
| 植物声频控制技术在设施蔬菜生产中的应用;侯天侦等;《农业工程学报》;20090228;第25卷(第2期);第156-160页 * |
| 虫鸣和音乐声频对六种蔬菜生长的影响试验;柏明娥;《安徽农业科学》;20101231;第16卷(第38期);第8365-8369页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102394064A (en) | 2012-03-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101600144B (en) | Method and system for obtaining a plurality of parameters of electro-acoustic product by adopting continuous logarithmic swept-frequency signal | |
| CN102857852B (en) | Method for processing playback array control signal of loudspeaker of sound-field quantitative regeneration control system | |
| CN104392718B (en) | A kind of robust speech recognition methods based on acoustic model array | |
| CN106255027A (en) | The tonequality Small Enclosure appraisal procedure of a kind of non-linear audio system and system | |
| EP3166239B1 (en) | Method and system for scoring human sound voice quality | |
| CN105136280A (en) | System and method for testing single noise quality in multi-source noise environment | |
| CN104535647A (en) | Prediction apparatus for sound absorption and insulation performance of multilayer material and method | |
| CN108615536B (en) | Time-frequency joint characteristic musical instrument tone quality evaluation system and method based on microphone array | |
| CN105371945B (en) | Remove the method and device of noise in hall impulse response measurement acoustical signal | |
| CN110109058A (en) | A kind of planar array deconvolution identification of sound source method | |
| EP3121808B1 (en) | System for modeling characteristics of an electronic musical instrument | |
| EP3121608A2 (en) | Method of modeling characteristics of a non linear system | |
| CN111796790B (en) | Sound effect adjusting method and device, readable storage medium and terminal equipment | |
| CN103323532A (en) | Fish identification method and system based on psychoacoustics parameters | |
| CN102394064B (en) | Combined type plant audio frequency regulation and control method | |
| US9060222B2 (en) | Method for determining an averaged frequency-dependent transmission function for a disturbed linear time-invariant system, evaluation device and computer program product | |
| TW200734888A (en) | Visualization system of acoustic source energy distribution and the method thereof | |
| CN105467013A (en) | Sound insulating material transmission loss predicting system and method based on mass law | |
| CN107509156A (en) | Sound equipment tuning device, tuning system and method with audio analysis writing function | |
| CN209562798U (en) | Audio test system and equipment | |
| CN109506762A (en) | Hydrophone based on filter receives signal correction method | |
| Weiming et al. | Design of an experimental platform to investigate the effects of audible sounds on plant growth | |
| CN104156509A (en) | Method for synthesizing noise | |
| Kuntz et al. | Limitations in the extrapolation of wave fields from circular measurements | |
| CN114034375B (en) | Ultra-high voltage transmission line noise measurement system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20180830 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |