CN104931439B - Apple Mould Core detector - Google Patents

Apple Mould Core detector Download PDF

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CN104931439B
CN104931439B CN201510309736.1A CN201510309736A CN104931439B CN 104931439 B CN104931439 B CN 104931439B CN 201510309736 A CN201510309736 A CN 201510309736A CN 104931439 B CN104931439 B CN 104931439B
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apple
light source
voltage
module
measured
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CN104931439A (en
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张海辉
陈克涛
任传奇
苏东
胡瑾
张佐经
雷雨
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Northwest A&F University
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Northwest A&F University
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Abstract

A kind of Apple Mould Core detector, comprising: LED light source module, sends the light of corresponding light intensity, irradiate the center in apple to be measured according to setting; Spectral detection module, receives the light through apple to be measured and completes opto-electronic conversion and obtain magnitude of voltage; Fruit footpath on-line measurement module, measures the diameter of apple to be measured; And, core processing module, the magnitude of voltage that receiving spectrum detection module obtains, calculates corresponding transmitted light intensity values according to this magnitude of voltage, receive described diameter data simultaneously, comprehensive transmitted light intensity values and diameter data, judged whether mould worry, and the present invention can Fast nondestructive evaluation Apple Mould Core, there is cost low, simple to operate, stable and reliable operation, disease discrimination precision high.

Description

Apple Mould Core detector
Technical field
The invention belongs to agriculture technical field of intelligent equipment, particularly a kind of Apple Mould Core detector.
Background technology
Apple Mould Core, also known as heartrot, is the Major Diseases of harm apple internal quality, and the incidence of disease of red fuji apple is general higher in recent years, and the general incidence of disease is about 21%, especially fruit-bagged Fuji, and its incidence of disease is up to 43.5%-79.5%.The main period of Apple Mould Core morbidity is in fructescence and storage period.Early-mid ripening apple most of appearance after maturation is gathered is differentiated not out, but comes into the market or morbidity fruit in consumer's hand can not eat; After late variety enters fruit storehouse, expansion and morbidity can be continued in storage period, full fruit be rotted, has no edibility.Neurotoxin contained by mould worry has affects toxicological effects such as giving birth to, carcinogenic and immune, and therefore, mould worry detects has become apple industry significant problem urgently to be resolved hurrily.
At present less for the detection method research of Apple Mould Core, its technology is mainly based on principles such as the bio-impedance characteristic of apple, light characteristic and machine vision characteristics, and wherein the input parameter that relates to of bio-impedance characteristic is more; The detection mode that light characteristic many application all band light source is combined with spectrometer, containing more redundant information, system cost is high; Machine Vision Detection analytic process is complicated, consuming time, and there is no the detection of more suitable detecting instrument for mould worry at present.The detection developing into Apple Mould Core of spectrum detection technique provides theoretical foundation.This technology have harmless, efficiency is high, speed is fast, cost is low, favorable reproducibility, sample are convenient without the need to pre-service, spectral measurement, be applicable to the unique advantage such as Site Detection and on-line analysis.But do not utilize the related application of this technology at present yet.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of Apple Mould Core detector, can Fast nondestructive evaluation Apple Mould Core, there is cost low, simple to operate, stable and reliable operation, disease discrimination precision high.
To achieve these goals, the technical solution used in the present invention is:
A kind of Apple Mould Core detector, comprising:
LED light source module, sends the light of corresponding light intensity, irradiates the center in apple to be measured according to setting;
Spectral detection module, receives the light through apple to be measured and completes opto-electronic conversion and obtain magnitude of voltage;
Fruit footpath on-line measurement module, measures the diameter of apple to be measured;
And,
Core processing module, the magnitude of voltage that receiving spectrum detection module obtains, calculates corresponding transmitted light intensity values according to this magnitude of voltage, receives described diameter data simultaneously, and comprehensive transmitted light intensity values and diameter data, judged whether mould worry.
The light source of described LED light source module adopts centre wavelength to be 710nm, half band-width is the LED light source of 25nm, the PT4115 chip adopting output current adjustable is as driving chip, core processing module is connected with driving chip, regulated the output current of driving chip by the pwm signal exporting different duty, thus realize the stable quantitatively adjustment of LED light source luminous intensity.
Adopt photodiode as electrooptical device in described spectral detection module, the input end of spectral detection module adopts RC low-pass filter, eliminate the high frequency noise that power supply brings, amplifier chip OP07 is adopted to be amplified by the voltage V0 of sampling resistor end, at output voltage termination filter capacitor, finally get actual effective magnitude of voltage.
Described fruit footpath on-line measurement module comprises vertical mobile device and horizontally disposed infrared emission pipe, apple to be measured to be positioned at immediately below infrared emission pipe correlation center and to be arranged on vertical mobile device, driven by vertical mobile device and move upward, when apple upper surface cuts off infrared emission line, obtain apple diameter D=(H-L), wherein H is the vertical distance initial value of vertical mobile device and infrared emission pipe, and L is the climb of vertical mobile device.
Described LED light source module, spectral detection module and fruit footpath on-line measurement module integration are arranged at one, wherein, body frame 7 arranges longitudinal leading screw 2, the bottom of leading screw 2 is provided with stroke-limit sensor 8, leading screw 2 is provided with slide unit 3, slide unit 3 connects apple supporting seat 4, the photodiode of spectral detection module is installed at the center of apple supporting seat 4, it is the LED light source 6 in LED light source module directly over apple supporting seat 4, LED light source 6 is planar array structure, its outer switching mode infrared emission pipe 5 being provided with fruit footpath on-line measurement module, switching mode infrared emission pipe 5 parallel with the array plane of LED light source 6 to ray, slide unit 3 drives the apple to be measured on apple supporting seat 4 to move upward, to being stopped by during apple stop to be measured ray of switching mode infrared emission pipe 5, the diameter of apple to be measured is obtained according to move distance.
Described determination methods is: by the apple diameter of acquisition and transmitted light intensity values, in input Apple Mould Core discrimination model, if fruit footpath is D, opto-electronic conversion voltage difference is V, namely the conversion voltage value obtained after opening light source and the difference of not opening the conversion voltage value that light source obtains, Y represents differentiation result, Y=1, is expressed as disease fruit; Y=0, be expressed as healthy fruit, its model is as follows:
D≤70；
Y = 1 ( V ≤ 90 ) ; 0 ( V > 90 ) ;
70<D≤80；
Y = 1 ( V &le; 80 + 160 - 2 &times; D ) ; 0 ( V > 80 + 160 - 2 &times; D ) ;
80<D≤85；
Y = 1 ( V &le; 60 + 340 - 4 &times; D ) ; 0 ( V > 60 + 340 - 4 &times; D ) ;
85<D≤90；
Y = 1 ( V &le; 35 + 450 - 5 &times; D ) ; 0 ( V > 35 + 450 - 5 &times; D ) ;
90<D；
Y = 1 ( V &le; 30 ) ; 0 ( V > 30 ) ;
Compared with prior art, the present invention utilizes visible ray-NIR transmittance spectroscopy, apple diameter based on narrow-band light source and the mould worry absorbance of impact detects Apple Mould Core, breach Apple Mould Core Fast nondestructive evaluation theory and means, promptly and accurately morbidity apple can be sorted out when apple is put in storage, the large area of Apple Mould Core germ is prevented to infect, significantly reduce the incidence of disease of apple at storage, and this detector can be used to fruit graded sorting in production line, for building " high yield, high-quality, efficiently, ecological, safety " modern Apple Industry system to provide the necessary technical support, project achievement easily extensible is applied to the Fast nondestructive evaluation of other fruit interior quality simultaneously.
Accompanying drawing explanation
Fig. 1 is the transmission spectrum curve figure of the sick fruit of Apple Mould Core of different onset degree.
Fig. 2 is present system structural representation.
Fig. 3 is spectral detection modular circuit schematic diagram of the present invention.
Fig. 4 is physical construction schematic diagram of the present invention.
Fig. 5 is apple supporting seat vertical view of the present invention.
Fig. 6 is apple supporting seat cut-open view of the present invention.
Fig. 7 is overhaul flow chart of the present invention.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.
Theoretical foundation of the present invention:
Apple is by after mould worry infection process morbidity, its ventricle biological tissue molecule morphs, to the absorption of spectrum, reflection acts on scattering etc. and changing, thus cause visible/near infrared transmission spectrum curve different, the tungsten halogen lamp light source of test employing 4 50W, marine optics spectrometer USB2000+ and computing machine construct Apple Mould Core spectral response characteristic and seek platform, this platform is utilized to carry out transmitted spectrum measurement to 500 apple sample and cut along carpopodium place, wherein get the spectrum picture curve of the mould worry fruit of 27 close different onset degree of Apples footpath, as shown in Figure 1.
Analysis chart 1 is known, in the wavelength band that spectrometer can respond, the wave band of 690nm-730nm responds best wave band to Apple Mould Core, and increase gradually along with the occurring degree of the sick fruit of Apple Mould Core, reducing gradually through peak of transmission spectrum curve, the increase directly reflecting Apple Mould Core occurring degree makes the transmitted spectrum intensity level of this wave band reduce, simultaneously according to lambert's beer's law, the difference of apple diameter, cause the distance of light source apart from spectrum acquisition device, the i.e. change of light path, thus the decay of derivative spectomstry intensity, therefore according to above-mentioned principle, known spectra absorption value just can measure the occurring degree of Apple Mould Core fruit with fruit footpath value.
The system architecture of the mould worry detector developed based on this principle as shown in Figure 2, comprises
LED light source module, light source adopts centre wavelength to be 710nm, half band-width is the LED light source of 25nm, the PT4115 chip that driving chip adopts output current adjustable, regulated the output current of PT4115 by the pwm signal exporting different duty, thus realize the stable quantitatively adjustment of LED light source luminous intensity.Finally send the light of corresponding light intensity, irradiate the center in apple to be measured.
Spectral detection module, adopt the FDS1010 type photodiode of THORLABS company, photoelectric conversion circuit such as Fig. 3 shows.First at the RC low-pass filter that voltage input end adopts resistance R2 and electric capacity C4 to form, eliminate the high frequency noise that power supply brings, secondly amplifier chip OP07 is adopted to be amplified by the voltage V0 that sampling resistor R3 holds, and at output voltage Vout termination filter capacitor C3, finally get actual effective magnitude of voltage.
Fruit footpath on-line measurement module, adopt indirect measure, comprise vertical mobile device and horizontally disposed infrared emission pipe, apple to be measured to be positioned at immediately below infrared emission pipe correlation center and to be arranged on vertical mobile device, driven by vertical mobile device and move upward, when apple upper surface cuts off infrared emission line, obtain apple diameter D=(H-L), wherein H is the vertical distance initial value of vertical mobile device and infrared emission pipe, and L is the climb of vertical mobile device.
Key-press module and display module, main realization and user's is mutual, and before starting to detect, user needs to be configured system, main select tested sample apple the place of production, kind and storage time, confirm after configuration successful to start to detect, after detection, show testing result.
Core processing module, with the MSP430F149 single-chip microcomputer of Texas Instruments for core processor, the magnitude of voltage that receiving spectrum detection module obtains, corresponding transmitted light intensity values is calculated according to this magnitude of voltage, receive described diameter data simultaneously, comprehensive transmitted light intensity values and diameter data, judged whether mould worry.
In the transition process of light signal-electric signal-light signal, mainly have passed through photodiode and amplification module:
Wherein the characteristic of photodiode is: V 0=P* β * R lwherein V 0for sampling resistor both end voltage; P is the light intensity value of unit wavelength, unit W, R lsampling resistor value; β is the photosensitive coefficient of photodiode, and unit is A/W.
The wavelength band of light source is that the photosensitive coefficient of 690nm to 730nm, FDS1010 photodiode in this wave band is linear, and formula is β=(0.4* λ-142)/300; Wherein λ is wavelength.
Therefore V 0=P* β * R l=P*R l* (0.4* λ-142)/300
P = V 0 * 300 R L * ( 0.4 * &lambda; - 142 )
The total intensity that light source sends Q = &Integral; 690 730 V 0 * 300 R L * ( 0.4 * &lambda; - 142 ) d&lambda;
Apple morbidity affects spectral transmission intensity level with apple diameter simultaneously, therefore, will obtain apple diameter and transmitted light intensity values, and in input Apple Mould Core discrimination model, if fruit footpath is D (unit mm), opto-electronic conversion magnitude of voltage is V 0(unit mv), Y represents that (Y=1, is expressed as disease fruit to differentiation result; Y=0, is expressed as healthy fruit), discrimination model is as follows:
D≤70；
Y = 1 ( V &le; 90 ) ; 0 ( V > 90 ) ;
70<D≤80；80<D≤85；
Y = 1 ( V &le; 80 + 160 - 2 &times; D ) ; 0 ( V > 80 + 160 - 2 &times; D ) ; Y = 1 ( V &le; 60 + 340 - 4 &times; D ) ; 0 ( V > 60 + 340 - 4 &times; D ) ;
85<D≤90；
Y = 1 ( V &le; 35 + 450 - 5 &times; D ) ; 0 ( V > 35 + 450 - 5 &times; D ) ;
90<D；
Y = 1 ( V &le; 30 ) ; 0 ( V > 30 ) ;
The present invention can by integrated one that is arranged at such as LED light source module, spectral detection module and fruit footpath on-line measurement modules, as shown in Figure 4, utilize body frame 7, body frame 7 arranges longitudinal leading screw 2, the bottom of leading screw 2 is provided with stroke-limit sensor 8, leading screw 2 is provided with the slide unit 3 connecting stepper motor 1, slide unit 3 connects apple supporting seat 4, the photodiode of spectral detection module is installed as shown in Figure 5 in the center of apple supporting seat 4, and the periphery of apple supporting seat 4 is provided with sealing light screening material 10.It is the LED light source 6 in LED light source module directly over apple supporting seat 4, LED light source 6 is planar array structure, its outer switching mode infrared emission pipe 5 being provided with fruit footpath on-line measurement module, and the fixed distance 4mm parallel with the array plane of LED light source 6 to ray of switching mode infrared emission pipe 5, switching mode infrared emission pipe 5 is 120mm with the vertical distance H of stroke-limit sensor 8
Control slide unit 3 back and forth movement in vertical direction, the initial position of each motion is stroke-limit sensor 8 place, be H with the vertical distance of switching mode infrared emission pipe 5, after apple supporting seat 4 places apple to be measured, slide unit 3 starts to move upward, the apple to be measured on apple supporting seat 4 is driven to move upward, cut off after infrared emission line until apple upper surface and stop, if now the position of slide unit 3 be final position and vertical motion distance for L, then Apples footpath account form is D=(H-L).
Workflow of the present invention as shown in Figure 7, first the diameter of apple to be measured is measured, device specifically by Fig. 4 completes, then its transmitted light spectrum is obtained, specifically also complete by the device of Fig. 4, namely, after completing diameter measurement, output pwm signal setting output current, adjustment array of source output intensity, after light source stable output, controls spectral intensity detection module and obtains transmission value, the fruit footpath obtained value substitutes in discrimination model with transmitted intensity values by last processor, and display exports result of determination.

Claims (2)

1. an Apple Mould Core detector, is characterized in that, comprising:
LED light source module, sends the light of corresponding light intensity, irradiates the center in apple to be measured according to setting;
Spectral detection module, receives the light through apple to be measured and completes opto-electronic conversion and obtain magnitude of voltage;
Fruit footpath on-line measurement module, measures the diameter of apple to be measured;
And,
Core processing module, the magnitude of voltage that receiving spectrum detection module obtains, calculates corresponding transmitted light intensity values according to this magnitude of voltage, receives described diameter data simultaneously, and comprehensive transmitted light intensity values and diameter data, judged whether mould worry;
The light source of described LED light source module adopts centre wavelength to be 710nm, half band-width is the LED light source of 25nm, the PT4115 chip adopting output current adjustable is as driving chip, core processing module is connected with driving chip, regulated the output current of driving chip by the pwm signal exporting different duty, thus realize the stable quantitatively adjustment of LED light source luminous intensity;
Adopt photodiode as electrooptical device in described spectral detection module, the input end of spectral detection module adopts RC low-pass filter, eliminate the high frequency noise that power supply brings, amplifier chip OP07 is adopted to be amplified by the voltage V0 of sampling resistor end, at output voltage termination filter capacitor, finally get actual effective magnitude of voltage;
Described fruit footpath on-line measurement module comprises vertical mobile device and horizontally disposed infrared emission pipe, apple to be measured to be positioned at immediately below infrared emission pipe correlation center and to be arranged on vertical mobile device, driven by vertical mobile device and move upward, when apple upper surface cuts off infrared emission line, obtain apple diameter D=(H-L), wherein H is the vertical distance initial value of vertical mobile device and infrared emission pipe, and L is the climb of vertical mobile device;
Described LED light source module, spectral detection module and fruit footpath on-line measurement module integration are arranged at one, wherein, body frame (7) arranges longitudinal leading screw (2), the bottom of leading screw (2) is provided with stroke-limit sensor (8), leading screw (2) is provided with slide unit (3), slide unit (3) is upper connects apple supporting seat (4), the photodiode of spectral detection module is installed at the center of apple supporting seat (4), it is the LED light source (6) in LED light source module directly over apple supporting seat (4), LED light source (6) is planar array structure, its outer switching mode infrared emission pipe (5) being provided with fruit footpath on-line measurement module, switching mode infrared emission pipe (5) parallel with the array plane of LED light source (6) to ray, slide unit (3) drives the apple to be measured on apple supporting seat (4) to move upward, to being stopped by during apple stop to be measured ray of switching mode infrared emission pipe (5), the diameter of apple to be measured is obtained according to move distance.
2. Apple Mould Core detector according to claim 1, it is characterized in that, describedly judge whether that the method for mould worry is: by the apple diameter that obtains and transmitted light intensity values, in input Apple Mould Core discrimination model, if fruit footpath is D, opening the opto-electronic conversion magnitude of voltage after light source is that V, Y represent differentiation result with the difference of the opto-electronic conversion magnitude of voltage not opening light source, Y=1, is expressed as disease fruit; Y=0, be expressed as healthy fruit, its model is as follows:
D≤70；
Y = 1 ( V &le; 90 ) ; 0 ( V > 90 ) ;
70<D≤80；
Y = 1 ( V &le; 80 + 160 - 2 &times; D ) ; 0 ( V > 80 + 160 - 2 &times; D ) ;
80<D≤85；
Y = 1 ( V &le; 60 + 340 - 4 &times; D ) ; 0 ( V > 60 + 340 - 4 &times; D ) ;
85<D≤90；
Y = 1 ( V &le; 35 + 450 - 5 &times; D ) ; 0 ( V > 35 + 450 - 5 &times; D ) ;
90<D；
Y = 1 ( V &le; 30 ) ; 0 ( V > 30 ) ; .
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Publication number Priority date Publication date Assignee Title
CN106000914A (en) * 2016-05-24 2016-10-12 西北农林科技大学 Apple sorting device for on-line nondestructive test on moldy core
CN105866050A (en) * 2016-05-24 2016-08-17 西北农林科技大学 Low-cost lossless and fast detecting equipment for apple moldy core
CN109127460A (en) * 2018-07-17 2019-01-04 西北农林科技大学 A kind of Apple Mould Core device and method of multistation fast automatic detecting and sorting
CN109115708A (en) * 2018-09-29 2019-01-01 西北农林科技大学 A kind of more quality integration nondestructive detection systems of apple internal and method

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JPH10318914A (en) * 1997-05-20 1998-12-04 Toyo Seikan Kaisha Ltd Inspection method of interior quality of vegetables and fruits and its device
JP3792175B2 (en) * 2002-05-15 2006-07-05 東罐興業株式会社 Internal quality inspection method and apparatus for core fruits and vegetables
CN2733343Y (en) * 2004-05-12 2005-10-12 严衍禄 Internal non-destructive integral analytical equipment for agricultural products such as fruit and vegetable
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