CN105606707A - Detection method for hybrid rice glume-split seeds based on acoustic characteristics - Google Patents
Detection method for hybrid rice glume-split seeds based on acoustic characteristics Download PDFInfo
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- CN105606707A CN105606707A CN201610064212.5A CN201610064212A CN105606707A CN 105606707 A CN105606707 A CN 105606707A CN 201610064212 A CN201610064212 A CN 201610064212A CN 105606707 A CN105606707 A CN 105606707A
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Abstract
The invention relates to a detection method for hybrid rice glume-split seeds based on acoustic characteristics. The detection method is characterized by acquiring a sound signal by controlling the falling height of the hybrid rice seeds and a distance between a sound sensor and an inclined collision glass plate and realizing the recognition and separation for normal seeds and glume-split seeds of hybrid rice by analyzing the time-domain characteristics and frequency domain characteristics of the sound signal. The detection method comprises the following specific steps: shaking a feeding device to make the hybrid rice seeds fall one by one and impact the collision plate; acquiring the sound signal generated by the collision between the seeds and the collision plate by the sound sensor; transmitting the sound signal to a computer by a data line; displaying and storing the sound sensor by the computer; utilizing digital signal processing software to process sound signal data, thereby acquiring the time-domain characteristic curve of the sound signal and extracting the time-domain characteristic values, including voltage amplitude, short-time energy and average amplitude, of the sound signal; performing Fourier transform on the signal, thereby acquiring a frequency-domain characteristic curve, and extracting the frequency-domain characteristic values, including area of power spectral density, maximum value of power spectral density and minimum value of power spectral density, of the sound signal.
Description
Technical field
The present invention relates to a kind of based on the clever seed detection method of splitting of hybrid rice seeds acoustic characteristic.
Background technology
There is the more serious clever phenomenon of splitting in hybrid rice seeds, this is a kind of hereditary capacity of sterile line. Hybrid rice systemKind time sterile line open grain husk by prolongations and the time increase the chance of catching pollen, opening for a long time in clever process, inside and outside clever meetingBecause of the aging even shrinkage such as Exposure to Sunlight, dehydration, cause the clever ability of closing of grain husk flower after being pollinated obviously to reduce, it is inside and outside that part grain husk is spentGrain husk is can not be completely closed and form cracking grain, though or can be reluctantly closed can not tightly hook of inside and outside grain husk close and form and split grain husk grain.We are all called Glume-open In Seeds of Hybrid Rice both of these case.
Rice paddy seed unavoidably can produce the grain husk that splits of rice husk in maturation, can affect seed and sends out after there is splitting grain huskBud performance, comprises that vigor reduction, germinating energy and germination percentage reduce, and Seedlings quality reduces, and even finally affects rice yield. RightRice paddy seed splits clever detection can not only control the germination percentage of paddy rice effectively, and effectively promotes the growth vigor of rice seedlingWith follow-up rice yield. Rice paddy seed split clever detection method and had wet cleaning process and image processing method present stage. Wet cleaning process only can be used forBy the rice paddy seed of seeding and seedling raising, and image processing method must ensure to split a clever side positive control phase equipment, therefore at present this twoKind method Shortcomings, is difficult to be applied to rice paddy seed and splits grain husk detection and sorting.
Current Domestic is existing outward utilizes the acoustic characteristic of agricultural and animal products to detect and sorting agricultural and animal products crackResearch. For example remain silent and strike the voice signal detection of metal surface, opening and not flavour splitted pine nut impact sound with opening American pistachiosSound detects, and Crack In Corn acoustics impact characteristics detects, and ghost, full normal fibert and the full shell fibert of opening strike metal soundSignal detection, egg cracks voice signal detects.
The present invention comes by controlling hybrid rice seeds height of drop and sound transducer and inclined impact glass plate spacingCollected sound signal, by analyzing time domain specification and the frequency domain characteristic of voice signal, analyzes its voltage magnitude, short-time energy, flatAll amplitude, power spectral density area, power spectral density maximum, power spectral density minimum of a value, realize the normal seed of hybrid riceWith the identification of splitting clever seed.
The present invention will be conducive to split grain husk hybridization water by utilizing the identification of hybrid rice seeds acoustic characteristic to split grain husk with normal seedThe sorting of rice, improves hybrid rice seeds entirety Germination performance and Seedlings quality.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: utilize acoustic sensor to obtain whereabouts rice paddy seed and impingement plate impact soundTone signal, by digital signal processing method in time and frequency domain analysis processing, analytical voltage amplitude, short-time energy, average widthDegree, power spectral density area, power spectral density maximum, power spectral density minimum of a value, extract characteristic value, comparative analysis hybridizationThe normal seed of paddy rice and split clever seed amplitude difference, determines the amplitude thresholds of differentiation, utilizes this threshold value normally to plant hybrid riceSon and split clever seed and identify and sorting.
(2) technical scheme
For achieving the above object, the invention provides a kind of hybrid rice based on acoustic characteristic splits clever seed detection and knowsOther method, the method comprising the steps of:
Hybrid rice seeds whereabouts impact sound tone signal obtaining step comprises: vibrating material feeding device makes hybrid rice seeds simple grainFall and collide with impingement plate, seed and impingement plate impact sound tone signal are transferred to computer through sound transducer and receive signal alsoStored sound signal.
By vibrating material feeding device vibrating feed, and ensure that every seed simple grain falls, whereabouts seed enters leakage through chuteBucket, hybrid rice seeds falls and collides with below inclined impact plate through funnel, after seed collision, under inclined impact plate, slides intoEnter piece-rate system normal hybrid rice seed and split clever seed to separate.
After hybrid rice seeds and impingement plate collision, be arranged on sound insulation tube internal sound sensor and gather seed and impingement plateImpact sound tone signal, data wire transmission voice signal is to computer, and Computer display and stored sound signal, be convenient to voice signalThe subsequent treatment of processing.
Hybrid rice seeds whereabouts impact sound signal processing method step comprises: utilize Digital Signal Processing software to soundTone signal data are processed, and obtain voice signal time domain specification curve, and extract voice signal temporal signatures value, simultaneously to letterNumber carrying out Fourier transform obtains frequency domain characteristic curve, and extracts voice signal frequency domain character value.
Utilize Digital Signal Processing software to process sound signal data, obtain voice signal time domain specification curve,And extract voice signal temporal signatures value, comparative analysis hybrid rice is split voice signal time domain specification between clever seed and normal seedDifference, and find a threshold value as criterion;
Signal is carried out to Fourier transform and obtain frequency domain characteristic curve, and extract voice signal frequency domain character value, relatively divideAnalysing hybrid rice splits voice signal voltage magnitude in the time of different frequency domain between clever seed and normal seed and changes and frequency domain characteristic difference.
(3) beneficial effect
The present invention obtains under hybrid rice seeds and falls behind with impingement plate collision and produce voice signal, splits clever paddy rice by analysisSeed and normal water rice fall to colliding acoustics characteristics of signals otherness, obtain to distinguish to split clever rice paddy seed and normal water riceVoltage threshold, short-time energy threshold value, short-time average magnitude threshold value, utilize threshold value normal hybrid rice seed and split clever seedDistinguish. By the normal seed of hybrid rice with split clever seeds fall collision acoustic signal in frequency-domain analysis, obtain to distinguish and split clever waterRice and normal water rice power spectral density area threshold, power spectral density maximum threshold, power spectral density minimum of a value thresholdValue, by normal hybrid rice seed with split clever seed zone and separate. By utilizing hybrid rice seeds acoustic characteristic detection method splittingGrain husk rice paddy seed and normal water rice distinguish, and are conducive to improve the germination percentage, growth of seedling performance of hybrid rice seeds evenFollow-up paddy growth and output.
Brief description of the drawings
Fig. 1 hybrid rice is normal and split clever seed voltage typical waveform figure;
Fig. 2 hybrid rice is normal and split clever seed short-time energy typical waveform figure;
Fig. 3 hybrid rice is normal and split clever seed average amplitude typical waveform figure;
Fig. 4 hybrid rice is normal and split clever seed power spectral density typical waveform figure;
The comprehensive discrimination figure of Fig. 5 Liangyou108 hybrid rice seeds;
Fig. 6 Liangyou108 hybrid rice seeds optimal location sound magnitude of voltage (H=150mm, h=10mm) figure.
Wherein (a) is hybridization normal water rice, (b) for clever rice paddy seed is split in hybridization.
Detailed description of the invention
The present invention propose based on the clever seed detection method of splitting of hybrid rice seeds acoustic characteristic, by reference to the accompanying drawings and implementExample is described in detail as follows.
Test material: experimental cross rice paddy seed kind is respectively Liangyou108 (the limited duty of Hunan legendary god of farming great Feng kind industry science and technologyRen company produces);
Hybrid rice seeds whereabouts impact sound tone signal obtaining step comprises: hybrid rice seeds vibrating feed simple grain fallsAnd collide with impingement plate, seed and impingement plate impact sound tone signal are transferred to computer through sound transducer and receive signal storageVoice signal.
By vibrating material feeding device vibrating feed, and ensure that every seed simple grain falls, whereabouts seed enters leakage through chuteBucket, hybrid rice seeds falls and collides with below inclined impact plate through funnel, after seed collision, under inclined impact plate, slides intoEntering piece-rate system separates with normal water rice splitting grain husk.
After hybrid rice seeds and impingement plate collision, be arranged on internal sound insulation pipe internal sound sensor and receive voice signal, soundTone signal is transferred to computer through data wire, and computer records, shows and stored sound signal data by software systems, is convenient toThe subsequent treatment of sound signal processing.
Hybrid rice seeds whereabouts impact sound signal processing method step comprises: utilize Digital Signal Processing software to soundTone signal data are processed, and obtain voice signal time domain specification curve, signal are carried out to Fourier transform simultaneously and obtain frequency domain spyLinearity curve, and extract voice signal power spectral density plot.
Utilize Digital Signal Processing software to process sound signal data, obtain voice signal time domain specification curve,Be voltage curve (Fig. 1), short-time energy curve (Fig. 2), short-time average magnitude curve (Fig. 3). By analyzing voice signalTime domain specification curve, extract respectively voice signal maximum voltage amplitude, short-time energy maximum, short-time average magnitude maximum.
The voltage magnitude of seeing normal water rice from Fig. 1 is generally greater than and splits clever rice paddy seed, therefore finds an electricityPress threshold value, in the time detecting that maximum voltage signal is more than or equal to this threshold value, be judged as normal water rice, otherwise for splitting grain huskRice paddy seed. Fig. 5 and Fig. 6 are the recognition effect figure that utilizes voltage threshold to obtain as judging means, and its comprehensive discrimination reaches92％。
The normal seed of following table 1 Liangyou108 mixing breed paddy rice and split clever seed and pass at different height of drop H and soundAcoustic characteristic discrimination between sensor and inclined impact plate under different distance h, as can be seen from the table: H=150mm, h=10mmTime, hybrid rice is normal and split clever seed discrimination and reach respectively 92% and 96%, for best height of drop H and sound transducer andDistance h between inclined impact plate.
By to carrying out short-time energy analysis after voice signal end-point detection, from Fig. 2, see the short of normal water riceTime energy peak be also greater than and split clever rice paddy seed. Therefore also obtain a short-time energy threshold value, when maximum short-time energy letter being detectedWhile number being more than or equal to this threshold value, be judged as normal water rice, otherwise for splitting clever rice paddy seed, its discrimination reaches 82%.
Due to short-time energyMay exist after squared and cause larger difference, therefore again by soundSignal averages height analysis, that is:From Fig. 3, still find out the average amplitude of normal water ricePeak value is greater than the average amplitude peak value that splits clever rice paddy seed. Therefore also obtain a short-time energy threshold value, maximum average when detectingWhen range signal is more than or equal to this threshold value, be judged as normal water rice, otherwise for splitting clever rice paddy seed, its discrimination reachesTo 82%.
Signal is carried out to Fourier transform and obtain frequency domain characteristic curve, utilize pwelch function ask power spectral density and drawGoing out curve map is power spectral density plot (Fig. 4), analyzes frequency-region signal power spectral density maximum, power spectral density minimum of a value meritRate spectrum density area. After dividing frame to process to voice signal, obtain the corresponding power spectral density value of each frame, by all power spectrumsDegree value summation obtains power spectrum area, splits clever rice paddy seed by relatively showing that the power spectrum area value of normal water rice is greater thanPower spectrum area value, its discrimination reaches 80%.
Claims (3)
1. the hybrid rice based on acoustic characteristic is split clever seed detection method and mainly comprises 2 aspects:
S1. hybrid rice seeds whereabouts impact sound tone signal obtaining step comprises: hybrid rice seeds simple grain falls and and impingement plateCollision, sound transducer gathers impact sound tone signal, is transferred in computer through data wire;
S2. hybrid rice seeds whereabouts impact sound signal processing method step comprises: utilize Digital Signal Processing software to soundSignal data is processed, and obtains voice signal time domain specification curve, and extracts voice signal time domain maximum amplitude, simultaneously to letterNumber carrying out Fourier transform obtains frequency domain characteristic curve, and extracts voice signal frequency domain character value.
2. the hybrid rice based on acoustic characteristic according to claim 1 is split clever seed detection method, it is characterized in that described in S1Hybrid rice seeds whereabouts impact sound tone signal obtaining step comprise:
S1.1 passes through vibrating material feeding device vibrating feed, and ensures that every seed simple grain falls, and whereabouts seed enters funnel through chute,Hybrid rice seeds through funnel fall and with below inclined impact plate collision, after seed collision along sliding under inclined impact plate pointSeparate with normal water rice splitting grain husk from system;
After S1.2 hybrid rice seeds and impingement plate collision, be arranged on sound insulation tube internal sound sensor collection seed and impingement plate and touchHit voice signal, data wire transmission voice signal is to computer, and Computer display and stored sound signal are convenient to voice signalSubsequent treatment.
3. the hybrid rice based on acoustic characteristic according to claim 2 is split clever seed detection method, it is characterized in that described in S2Hybrid rice seeds whereabouts impact sound signal processing method step comprises:
S2.1 utilizes digital signal processing method to process sound signal data, obtains the i.e. electricity of voice signal time domain specification curveBuckle line, short-time energy curve, short-time average magnitude curve, by analyzing the time domain specification curve of voice signal, comparative analysisHybrid rice is split between clever seed and normal seed voice signal in the difference of the each characteristic value of time domain;
S2.2 carries out Fourier transform to signal and obtains frequency domain characteristic curve, analyzes frequency-region signal power spectral density maximum, powerSpectrum density minimum of a value and power spectral density area also extract voice signal frequency domain character value, comparative analysis hybrid rice split clever seed withBetween normal seed, voice signal is in the difference of the each characteristic value of frequency domain.
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Cited By (5)
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| CN106595540A (en) * | 2016-12-15 | 2017-04-26 | 贵州虹轴轴承有限公司 | Bearing ball surface flatness detection apparatus based on sound waves |
| CN107300588A (en) * | 2017-06-23 | 2017-10-27 | 陕西师范大学 | A kind of PSO SVM optimization methods that the fusion of acoustical signal multiple domain is collided based on iblet |
| CN109961441A (en) * | 2019-03-19 | 2019-07-02 | 广东省农业科学院水稻研究所 | Hybrid rice seed splits the efficient measuring method of clever rate |
| CN110501065A (en) * | 2019-07-24 | 2019-11-26 | 南京农业大学 | Hybrid rice based on collision characteristic splits clever Seed inspection method |
| CN111613245A (en) * | 2020-05-25 | 2020-09-01 | 长沙理工大学 | Ore quality analysis method and device based on sound signal processing |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595540A (en) * | 2016-12-15 | 2017-04-26 | 贵州虹轴轴承有限公司 | Bearing ball surface flatness detection apparatus based on sound waves |
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| CN107300588A (en) * | 2017-06-23 | 2017-10-27 | 陕西师范大学 | A kind of PSO SVM optimization methods that the fusion of acoustical signal multiple domain is collided based on iblet |
| CN109961441A (en) * | 2019-03-19 | 2019-07-02 | 广东省农业科学院水稻研究所 | Hybrid rice seed splits the efficient measuring method of clever rate |
| CN110501065A (en) * | 2019-07-24 | 2019-11-26 | 南京农业大学 | Hybrid rice based on collision characteristic splits clever Seed inspection method |
| CN111613245A (en) * | 2020-05-25 | 2020-09-01 | 长沙理工大学 | Ore quality analysis method and device based on sound signal processing |
| CN111613245B (en) * | 2020-05-25 | 2023-08-18 | 长沙理工大学 | Ore quality analysis method and equipment based on sound signal processing |
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Application publication date: 20160525 |