CN101358950A - Method for detecting creak of eggs of poultry - Google Patents
Method for detecting creak of eggs of poultry Download PDFInfo
- Publication number
- CN101358950A CN101358950A CNA2008101204458A CN200810120445A CN101358950A CN 101358950 A CN101358950 A CN 101358950A CN A2008101204458 A CNA2008101204458 A CN A2008101204458A CN 200810120445 A CN200810120445 A CN 200810120445A CN 101358950 A CN101358950 A CN 101358950A
- Authority
- CN
- China
- Prior art keywords
- frequency
- eggs
- beasts
- birds
- 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.)
- Pending
Links
Images
Abstract
The present invention provides a poultry egg crack detection method. The method comprises the following steps in sequence: firstly, the poultry egg is beaten; secondly, the sound response after the poultry egg is beaten is collected, amplified and then transformed into digital signals by an A/D converter; thirdly, according to the selected short-time Fourier transformation length, each section of sound signals are processed through short-time Fourier transformation in the time sequence, and the sound signals in the original time domain are transformed onto the frequency domain to acquire the frequency information of the sound signals at each time point; fourthly, the time and the frequency are respectively used as coordinate axes to build a two-dimensional coordinate system, and the amplitude information of each frequency component at each time point is mapped to acquire a two-dimensional distribution map of frequency signals; fifthly, the two-dimensional graphic mode of the two-dimensional distribution map of the frequency signals is applied to judge whether the poultry egg has a crack. The technical proposal of the method can directly, rapidly and conveniently detect the poultry crack, and has better sensitivity and stability.
Description
Technical field
The present invention relates to the birds, beasts and eggs production process field of robotization, relate in particular to the birds, beasts and eggs crack detection method.
Background technology
Birds, beasts and eggs such as egg, duck's egg are because its abundant nutritive value is people's an a kind of main food.Along with the development of modernized poultry-farm, after poultry gave birth to birds, beasts and eggs, follow-up required robotization degree of treatment was also more and more higher, and people have developed a series of automated machines, birds, beasts and eggs was realized functions such as cleaning, classification, bad egg's rejecting.Thereby improved labour productivity greatly.Among this, the automatic detection in birds, beasts and eggs crack is a crucial task.
At the automatic detection in birds, beasts and eggs crack, people have carried out some researchs.Present topmost method still adopts the method for acoustics to detect, cardinal principle is knocked eggshell at first adopting a hand hammer, with the voice response of microphone record eggshell, passes through different signal processing methods afterwards then, voice response is handled, thereby realized the detection in birds, beasts and eggs crack.But the various signal processing methods that present people are adopted all also exist certain defective, cause judging means directly perceived inadequately, judge that difficulty is inaccurate greatly, not too adapt to the requirement that the birds, beasts and eggs robotization is handled.
Summary of the invention
Technical matters to be solved by this invention provides comparatively convenient intuitively, sensitive, the stable more birds, beasts and eggs crack detection method of a kind of judgement.For this reason, the present invention is by the following technical solutions: adopt the short time discrete Fourier transform technology, the voice response signal that birds, beasts and eggs knock analyzed, with obtain the voice response signal in the part of frequency domain, the information of transient state, and represent, thereby carry out Crack Detection with the form of two dimension; It may further comprise the steps:, and may further comprise the steps:
1), impacts birds, beasts and eggs;
2), the voice response after picking up birds, beasts and eggs and catching a packet, after the amplification, convert digital signal to through A/D converter again;
3), according to the short time discrete Fourier transform length chosen, be order with time, each section voice signal is carried out short time discrete Fourier transform successively, the voice signal on the original time domain is transformed on the frequency domain, obtain the frequency information of voice signal on each time point;
4) be coordinate axis with time and frequency, respectively, set up two-dimensional coordinate system, draw the amplitude information of each frequency component on each time point, obtain a two-dimentional frequency signal distribution plan;
5), judge according to the X-Y scheme pattern of two-dimentional frequency signal distribution plan whether birds, beasts and eggs have the crack.
Owing to adopt technical scheme of the present invention, the present invention carries out short time discrete Fourier transform to the voice signal on each time point, on the basis of short time discrete Fourier transform, obtain with time is horizontal ordinate, frequency is the amplitude distribution figure of the two-dimentional frequency component of ordinate, by identification, can realize the detection in birds, beasts and eggs crack intuitively, quickly and easily then, have better sensitivity and stability X-Y scheme.
Description of drawings
Fig. 1 is for realizing the hardware block diagram of method provided by the present invention.
Fig. 2 is the two-dimentional histogram that utilizes the resulting complete birds, beasts and eggs of the inventive method.
Fig. 3 utilizes the resulting two-dimentional histogram that the crack birds, beasts and eggs are arranged of the inventive method.
Embodiment
With reference to Fig. 1, Reference numeral 1 is an egg to be measured, and the hardware that present embodiment adopted comprises
1), hand hammer 2, it can be made of harder wood materials or macromolecular material;
2), sound transducer 3, it can adopt general Electret condenser microphone;
3), prime amplifier 4 and A/D converter 5, also can adopt related device commonly used;
4), computing machine 6.
In the present embodiment, the signal sampling frequency that is adopted is 200kHz.Voice signal converts to after the digital signal, is transferred in the computing machine, carries out short time discrete Fourier transform by computing machine afterwards, and the corresponding two-dimentional histogram that draws, to realize detection.The length of short time discrete Fourier transform can be determined according to the duration and the employed sample frequency of A/D converter of birds, beasts and eggs voice signal.Generally speaking, the length of short time discrete Fourier transform can be chosen as 256 points, 512 or 1024 points.In the present embodiment, the length of the short time discrete Fourier transform that is adopted is 512 points.
The step of present embodiment is as follows: to birds, beasts and eggs 1 by hand hammer 2 apply one fast machinery hit, then, pick up voice response after birds, beasts and eggs 1 catch a packet by sound transducer 3.After the amplification and processing of the feeble signal that sound transducer 3 is picked up through prime amplifier 4, pass through A/D converter 5 again, convert to after the digital signal, reach computing machine 6.
Computing machine is order according to the transform length of choosing with time, and each section voice signal is carried out short time discrete Fourier transform successively, and the voice signal on the original time domain is transformed on the frequency domain, obtains the frequency information of voice signal on each time point.
Computing machine is a horizontal ordinate with time, is ordinate with the frequency, draws each time point upper frequency information, obtains a two-dimentional frequency signal distribution plan.Two-dimentional frequency signal distribution plan is to adopt business software MATLAB to draw in the present embodiment, can adopt drafting such as other softwares such as EXCEL or use the UNCOL(universal computer oriented language) drafting of programming voluntarily.
On above resulting figure, if complete birds, beasts and eggs, then graphic presentation is a single main peak, and its figure as shown in Figure 2; If crannied birds, beasts and eggs, then resulting figure has two or more main peaks, and its figure as shown in Figure 3.Thereby by to the observation of figure, can carry out intuitively, the birds, beasts and eggs crack is judged fast and accurately.
The judgement principle of method that the present invention adopts is, when bird egg when being complete, it is under the effect of external force, and the voice signal that is produced is purer, and from the angle of frequency domain, such sound has only a single dominant frequency; And when bird egg had the crack, under external force, its voice response was more numerous and diverse, and from the angle of frequency domain, such signal will have two or more main peaks.Simultaneously, to produce voice signal after being subjected to the external force effect be a unstable signal to birds, beasts and eggs.The birds, beasts and eggs crack processing method of being reported at present adopts Fourier transform that whole voice signal is carried out conversion mostly, then frequency content is discerned.Because the voice response signal of birds, beasts and eggs is a unstable signal, therefore adopt such method will make extremely short useful signal by lot of background signal averaging, result's amplitude of useful signal on frequency domain reduces greatly.And short time discrete Fourier transform method of the present invention is carried out short time discrete Fourier transform to the voice signal on each time point; Afterwards, on the basis of short time discrete Fourier transform, obtaining with time is horizontal ordinate, frequency is the two-dimentional histogram of ordinate, by the identification to X-Y scheme, reaches the detection in birds, beasts and eggs crack, detection method is more directly perceived, accurate, quick, has better sensitivity and stability.
Claims (2)
1, a kind of birds, beasts and eggs crack detection method, it is characterized in that adopting the short time discrete Fourier transform technology, the voice response signal that birds, beasts and eggs knock analyzed, with obtain the voice response signal in the part of frequency domain, the information of transient state, and represent, thereby carry out Crack Detection with the form of two dimension; It may further comprise the steps:
1), impacts birds, beasts and eggs;
2), the voice response after picking up birds, beasts and eggs and catching a packet, after the amplification, convert digital signal to through A/D converter again;
3), according to the short time discrete Fourier transform length chosen, be order with time, each section voice signal is carried out short time discrete Fourier transform successively, the voice signal on the original time domain is transformed on the frequency domain, obtain the frequency information of voice signal on each time point;
4) be coordinate axis with time and frequency, respectively, set up two-dimensional coordinate system, draw the amplitude information of each frequency component on each time point, obtain a two-dimentional frequency signal distribution plan;
5), judge according to the X-Y scheme pattern of two-dimentional frequency signal distribution plan whether birds, beasts and eggs have the crack.
2, a kind of birds, beasts and eggs crack detection method as claimed in claim 1 is characterized in that its duration and employed sample frequency of A/D converter according to the birds, beasts and eggs voice signal, determines the length of short time discrete Fourier transform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101204458A CN101358950A (en) | 2008-09-04 | 2008-09-04 | Method for detecting creak of eggs of poultry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101204458A CN101358950A (en) | 2008-09-04 | 2008-09-04 | Method for detecting creak of eggs of poultry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101358950A true CN101358950A (en) | 2009-02-04 |
Family
ID=40331455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101204458A Pending CN101358950A (en) | 2008-09-04 | 2008-09-04 | Method for detecting creak of eggs of poultry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101358950A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955005A (en) * | 2011-08-19 | 2013-03-06 | 郑经伟 | Egg product detector |
| CN102998364A (en) * | 2012-11-20 | 2013-03-27 | 雅安恒圣高纯石墨科技有限责任公司 | Audio spectrum detection system and method for internal crack of graphite product |
| CN103018336A (en) * | 2012-12-07 | 2013-04-03 | 浙江大学 | Triggered knocking method and device for online crack detection of poultry eggs |
| CN103674235A (en) * | 2014-01-03 | 2014-03-26 | 哈尔滨工业大学 | Single frequency alarm sound feature detection method on basis of STFT (Short-Time Fourier Transform) |
| CN104662420A (en) * | 2012-07-05 | 2015-05-27 | 墨巴集团有限公司 | Method and apparatus for detecting cracks in eggshells |
| CN104677993A (en) * | 2015-02-15 | 2015-06-03 | 浙江大学 | Multi-section track type online detection device and method for cracks on eggs on basis of vibrational acoustic characteristics |
| CN107127162A (en) * | 2016-02-27 | 2017-09-05 | 倪明旺 | Damage shell egg automatic detection separator |
| CN110187006A (en) * | 2019-05-20 | 2019-08-30 | 江苏大学 | A kind of eggshell crack detecting method of multistation acoustic response signal analysis |
| JPWO2019082730A1 (en) * | 2017-10-24 | 2020-11-12 | 株式会社ナベル | Eggshell condition inspection device |
| CN112568183A (en) * | 2020-12-08 | 2021-03-30 | 贵州省种畜禽种质测定中心 | Poultry breeding and seed selection system and method based on Internet of things |
| CN116148357A (en) * | 2023-04-21 | 2023-05-23 | 华裕农业科技有限公司 | Egg crack automatic detection and classification system and method capable of accurately sorting eggs |
-
2008
- 2008-09-04 CN CNA2008101204458A patent/CN101358950A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955005A (en) * | 2011-08-19 | 2013-03-06 | 郑经伟 | Egg product detector |
| CN102955005B (en) * | 2011-08-19 | 2014-11-05 | 郑经伟 | Egg product detector |
| CN104662420A (en) * | 2012-07-05 | 2015-05-27 | 墨巴集团有限公司 | Method and apparatus for detecting cracks in eggshells |
| CN102998364A (en) * | 2012-11-20 | 2013-03-27 | 雅安恒圣高纯石墨科技有限责任公司 | Audio spectrum detection system and method for internal crack of graphite product |
| CN103018336A (en) * | 2012-12-07 | 2013-04-03 | 浙江大学 | Triggered knocking method and device for online crack detection of poultry eggs |
| CN103674235A (en) * | 2014-01-03 | 2014-03-26 | 哈尔滨工业大学 | Single frequency alarm sound feature detection method on basis of STFT (Short-Time Fourier Transform) |
| CN104677993A (en) * | 2015-02-15 | 2015-06-03 | 浙江大学 | Multi-section track type online detection device and method for cracks on eggs on basis of vibrational acoustic characteristics |
| CN107127162A (en) * | 2016-02-27 | 2017-09-05 | 倪明旺 | Damage shell egg automatic detection separator |
| CN107127162B (en) * | 2016-02-27 | 2020-01-14 | 二商健力广平生物科技有限公司 | Automatic detection and separation device for damaged eggs |
| JPWO2019082730A1 (en) * | 2017-10-24 | 2020-11-12 | 株式会社ナベル | Eggshell condition inspection device |
| JP7057602B2 (en) | 2017-10-24 | 2022-04-20 | 株式会社ナベル | Eggshell condition inspection device |
| CN110187006A (en) * | 2019-05-20 | 2019-08-30 | 江苏大学 | A kind of eggshell crack detecting method of multistation acoustic response signal analysis |
| CN110187006B (en) * | 2019-05-20 | 2022-01-11 | 江苏大学 | Eggshell crack detection method for multi-station acoustic response signal analysis |
| CN112568183A (en) * | 2020-12-08 | 2021-03-30 | 贵州省种畜禽种质测定中心 | Poultry breeding and seed selection system and method based on Internet of things |
| CN116148357A (en) * | 2023-04-21 | 2023-05-23 | 华裕农业科技有限公司 | Egg crack automatic detection and classification system and method capable of accurately sorting eggs |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101358950A (en) | Method for detecting creak of eggs of poultry | |
| CN101413928B (en) | Fowl egg crack rapid on-line nondestructive detection device and method based on acoustic characteristic | |
| CN106447040B (en) | Mechanical equipment health state evaluation method based on Heterogeneous Multi-Sensor Data fusion | |
| CN106847262A (en) | A kind of porcine respiratory disease automatic identification alarm method | |
| CN110044472B (en) | Intelligent detection system for abnormal sound and abnormal sound of online product | |
| CN106328130A (en) | Robot voice addressed rotation system and method | |
| EP2019304A3 (en) | Evaluation apparatus of hub unit and evaluating method of hub unit | |
| CN102353701A (en) | Diagnostic method for insect attacks on crops by utilizing volatile matter | |
| CN110850244A (en) | Local discharge defect time domain map diagnosis method, system and medium based on deep learning | |
| Parks et al. | North Atlantic right whale (Eubalaena glacialis) acoustic behavior on the calving grounds | |
| CN101419196A (en) | Thin crack hammering response detection device and method for poultry egg | |
| CN110208377A (en) | A kind of more characteristic parameters damage degree assessment method based on Lamb wave | |
| CN105979255A (en) | Audio acquisition tooling, method and cloud server | |
| CN106604193A (en) | Defect detection method and system applied to receiver | |
| CN110568073B (en) | Method for picking up impact signal in noise environment | |
| CN104391045A (en) | Sound-wave-based square wood hole-defect recognition system and method | |
| CN105954711B (en) | A kind of real-time acoustic source orientation method based on intensity difference effect | |
| CN109409216B (en) | Speed self-adaptive indoor human body detection method based on subcarrier dynamic selection | |
| CN204613160U (en) | A kind of bird egg crack detection device | |
| CN104849350B (en) | Defects in timber method for identifying and classifying based on multiple features | |
| CN104749249B (en) | A kind of method of the detection physical purity of seed based on ultrasonic technology | |
| CN110673125B (en) | Sound source positioning method, device, equipment and storage medium based on millimeter wave radar | |
| CN104833724A (en) | Poultry eggshell crack detection method and device | |
| CN116881712A (en) | Electromagnetic pulse signal identification method for movable cracks of concrete dam | |
| CN116541672A (en) | Fish culture feeding amount decision method based on acoustic information and water surface fluctuation information |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090204 |