CN104977262A - Portable detection apparatus for potato late blight - Google Patents
Portable detection apparatus for potato late blight Download PDFInfo
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- CN104977262A CN104977262A CN201510386387.3A CN201510386387A CN104977262A CN 104977262 A CN104977262 A CN 104977262A CN 201510386387 A CN201510386387 A CN 201510386387A CN 104977262 A CN104977262 A CN 104977262A
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Abstract
The invention provides a portable detection apparatus for potato late blight. In the detection apparatus, LED light sources of four colors are symmetrically and uniformly placed on an LED lamp support according to the ascending sequence of wavelength (i.e., from 525 to 550 to 700 to 770 nm), wherein an excircle of the upper plane of the LED lamp support has a diameter of 140 mm; when a system starts to acquire data, the number of lightened LED light sources is selected via a keyboard, then LED lamps are successively lightened according to the ascending sequence of wavelength, and a condensing cylinder gathers light rays onto a potato leaf to be detected; 1 second after lightening of LED lamps of each wavelength, sampling and conversion by an A/D converter are started and last for 5 s so as to allow a silicon-based photoelectric converter to fully adapt to a current environment created by lightening LED lamps of corresponding wavelength and to have adequate time to carry out sampling and photoelectric conversion; after data acquisition, data is converted into a data signal by an analog-to-digital converter, the data signal is then into a one-chip microcomputer, the one-chip microcomputer displays and outputs detection results onto a liquid crystal screen after calculation; the word--health is output if the sample is healthy; and if the sample suffers from late blight, the word--disease is output and buzzing is sounded for alarming.
Description
Technical field
The present invention relates to a kind of potato leaf late blight diagnostic system, particularly relate to a kind of diagnostic method of potato leaf late blight of feature based wavelength LED.
Background technology
Potato is Solanaceae, annual stem tuber herbaceous plant, have that output is high, the feature such as strong adaptability, nutritious, grain dish dual-purpose and comprehensive process purposes are wide, be distributed widely in all over the world, become the fourth-largest cereal crops in the world after wheat, paddy rice and corn.And along with the development of compartmentalization and scale is planted in climate warming and potato culture, the late blight of potato generally occurs, and endangers in rising trend, has had a strong impact on potato yield, quality and commodity rate, becomes a large factor of restriction Development of Potato Industry.
Traditional plant disease detection method mainly contains artificial sense and judges and Physico-chemical tests two kinds, and they all exist defect to a certain degree.Artificial sense criterion be subject to the subjective factors such as weather conditions, health status, mood and objective factor impact, thus cause erroneous judgement; And the technical requirement of Physico-chemical tests to operator is higher, and complex steps, to sample, there is destructiveness and poor in timeliness.
In recent years, have already been proposed pick-up unit and the method for some plant diseases.If the patent No. is CN203178188U, propose a kind of plant health condition detection apparatus based on spectral imaging technology, by exciting pigment in plant leaf fluorescence, obtaining fluorescence and the visible images of plant leaf blade different-waveband simultaneously, realizing the detection of plant health situation; And for example the patent No. is CN101074926A, propose a kind of plant leaf blade of visible and near infrared spectrum or crown botrytis diagnostic method and system, gather by the spectral information of measuring plants, Applied Chemometrics method establishment disease spectral model, realizes the detection to disease.But spectrum imaging system involves great expense, checkout procedure is numerous and diverse, length consuming time, cannot large-scale promotion use; Visible or near infrared spectroscopy belongs to Testing of Feeble Signals, and sensitivity is lower.
Summary of the invention
For above-mentioned defect, the technical problem to be solved in the present invention how to provide a kind of pick-up unit to realize disease Non-Destructive Testing fast and effectively and cost is not high when simplifying testing process, when shortening sense cycle, is applicable to promoting the use of.
The present invention is made up of load module, detection probe, Data Acquisition and Conversion System (DACS) and output module four parts.
Described load module is made up of keyboard.When system starts image data, first selected the number of light source by keyboard, by lighting the LED of 2 kinds or 3 kinds colors to shorten detection time.
Described detection probe comprises LED lamp holder, LED light source, light collecting barrel.525,550,700,770nm is 4 characteristic wavelengths that can characterize late blight, select the LED of 4 kinds of different wave lengths that wavelength is close with it as light source, and be distributed on support in the mode that symmetry is uniform; Add a light collecting barrel before each LED, the light that light source is sent can be radiated on potato leaf to be measured.
Described Data Acquisition and Conversion System (DACS) is made up of silicon photocell detecting device and microprocessor.Silicon photocell detecting device is placed on directly over sample, and its effect is the light that reception sample reflection LED light source is returned; Analog to digital converter adopts ADC0809, and the light signal that photoelectric cell receives is converted to digital signal; Single-chip microcomputer selected by microprocessor, after data acquisition, carries out operational analysis via analog-to-digital digital signal input single-chip microcomputer.
Described output module is that liquid crystal display and buzzing are reported to the police.Testing result through single-chip microcomputer computing is shown by liquid crystal display; If catch an illness sample, buzzing alarm module also performs simultaneously.
Wherein, LED is connected with analog to digital converter and single-chip microcomputer by wire with silicon photocell, and all parts are all placed in camera bellows.
Compared with background technology, effective effect that the present invention has is:
(1) as long as utilize high light spectrum image-forming technology to find the characteristic wavelength that can reflect plant disease, thinking of the present invention just can be applied to quick, accurate, stable, real-time, the nondestructive detection of disease.The feature of other plant disease is that diseased region is based on blade.
(2) the present invention adopts the life-span is long, price is low LED as light source, and a whole detection system just just portable system with the embedded scm of several LED, volume is little, lightweight, and cost is low, easy to use, is easy to carry.
(3) Defect inspection of the present invention is the whole spectral informations based on several characteristic wavelengths instead of sample.Therefore without the need to the chemometrics method that calculated amount is large and loaded down with trivial details, program is simple, can write and be embedded in single-chip microcomputer.
(4) in testing process, do not use chemical reagent, without the need to destroying plant leaf blade, can Non-Destructive Testing be realized, also reduce labour intensity simultaneously, accelerating analysis speed.
(5) according to testing result, drug treating is carried out to the plant that catches an illness, can the drug dose caused owing to spraying comprehensively be reduced, reduce production cost and decreasing pollution.
Accompanying drawing explanation
Fig. 1 is the structural representation of light path system of the present invention.
In figure, 1.LED lamp support, 2.LED light source, 3. light collecting barrel, 4. silicon photocell detecting device.
Fig. 2 is structural principle block diagram of the present invention.
Fig. 3 is software main program process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described, but does not limit protection scope of the present invention.
As shown in Figure 1, in this pick-up unit, the LED light source 2 of 4 kinds of colors is placed in the LED lamp holder 1 that upper plane cylindrical is 140mm symmetrically and evenly according to wavelength order from small to large (namely 525,550,700,770nm).System open image data time, select the number of the LED light source be lit from keyboard, then LED 2 is lighted successively according to wavelength order from small to large, light collecting barrel 3 by light-ray condensing on potato leaf to be measured.Start carry out A/D converter sampling and change after the LED 2 of each wavelength lights 1 second, set of time is 5s, and object allows silicon light photoelectric commutator 4 fully adapt to the environment of current wavelength LED 2 and to have the sufficient time to carry out sampling and opto-electronic conversion.
In addition, sample reflectivity is at different wavelengths a relative variable, therefore corrects acquisition instrument.Because under these four characteristic wavelengths, the reflectivity of black is 0 substantially, the present invention only carries out white correction.Method is: use the LED of four kinds of characteristic wavelengths to standard white plate (BaSO respectively
4) irradiate, the data that silicon photoconverter measures are its reflectance data; The reflectance data I of sample under each wavelength
stdivided by the reflectance data I of blank under this wavelength
wt, be the spectral reflectivity R under current wavelength
sample.Computing formula is: R
sample=I
st/ I
wt.
Composition graphs 2, single-chip microcomputer is the control axis of this pick-up unit, and light path system is the most key hardware device, and liquid crystal display and buzzer siren are used for the testing result of output sample.After light path system carries out data acquisition to sample, via analog to digital converter conversion digital signal input single-chip microcomputer, after single-chip microcomputer computing by testing result display translation on liquid crystal display: if sample is healthy, output " Health "; If late blight suffered from by sample, then export " Disease " and buzzing warning.
Fig. 3 is the software main program process flow diagram of pick-up unit of the present invention.Mainly be divided into three large modules: master routine, A/D converse routine and liquid crystal display program.Wherein, for simplifying programming, the calculating of the late blight of potato being classified in early days has incorporated in the middle of A/D modular converter.Digital signal after conversion is sent into single-chip microcomputer by A/D converter, obtains the actual value of collection signal, and carries out late blight of potato classified calculating, finally testing result outputted on liquid crystal display after single-chip microcomputer calculation process.
Claims (6)
1. the pick-up unit of the portable late blight of potato is characterized in that comprising load module, detection probe, Data Acquisition and Conversion System (DACS) and output module four parts, is all placed in camera bellows, impacts to prevent various forms of light to testing process.
2. the pick-up unit of the portable late blight of potato according to claim 1, is characterized in that load module is made up of keyboard.When system starts image data, first selected the number of light source by keyboard, by lighting the LED of 2 kinds or 3 kinds colors to shorten detection time.
3. the pick-up unit of the portable late blight of potato according to claim 1, it is characterized in that detection probe comprises LED lamp holder (1), LED light source (2), light collecting barrel (3): 4 characteristic wavelengths that can characterize late blight are 525,550,700,770nm, select the LED (2) of 4 kinds of different wave lengths that wavelength is close with it as light source, and be distributed on support (1) in the mode that symmetry is uniform; Add a light collecting barrel (3) before each LED, the light that light source is sent can be radiated on potato leaf to be measured.
4. the pick-up unit of the portable late blight of potato according to claim 1, it is characterized in that Data Acquisition and Conversion System (DACS) is made up of silicon photocell detecting device (4), analog to digital converter and microprocessor: silicon photocell detecting device (4) is placed on directly over sample, its effect is the light that reception sample reflection LED light source is returned; Analog to digital converter adopts ADC0809, and the light signal that photoelectric cell receives is converted to digital signal; Single-chip microcomputer selected by microprocessor, after data acquisition, carries out operational analysis via analog-to-digital digital signal input single-chip microcomputer.Silicon photocell detecting device is connected with analog to digital converter and single-chip microcomputer by wire.
5. the pick-up unit of the portable late blight of potato according to claim 1, is characterized in that output module is reported to the police by liquid crystal display and buzzing and forms: the testing result through single-chip microcomputer computing is shown by liquid crystal display; If catch an illness sample, buzzing alarm module also performs simultaneously.
6. the pick-up unit of the portable late blight of potato according to claim 3 or 5, it is characterized in that the LED (2) as light source is connected with single-chip microcomputer by wire with silicon photocell (4), all parts are all placed in camera bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510386387.3A CN104977262A (en) | 2015-06-24 | 2015-06-24 | Portable detection apparatus for potato late blight |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510386387.3A CN104977262A (en) | 2015-06-24 | 2015-06-24 | Portable detection apparatus for potato late blight |
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| CN201510386387.3A Pending CN104977262A (en) | 2015-06-24 | 2015-06-24 | Portable detection apparatus for potato late blight |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060734A (en) * | 2018-06-19 | 2018-12-21 | 江苏大学 | The zearalenone visualization fast screening system and method for fluorescence imaging |
| CN109752324A (en) * | 2017-11-02 | 2019-05-14 | 西北农林科技大学 | A kind of late blight of potato fiber spectrum detection device of specific wavelength LED |
| CN113109341A (en) * | 2021-04-08 | 2021-07-13 | 云南农业大学 | Quick detection device of potato disease |
-
2015
- 2015-06-24 CN CN201510386387.3A patent/CN104977262A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752324A (en) * | 2017-11-02 | 2019-05-14 | 西北农林科技大学 | A kind of late blight of potato fiber spectrum detection device of specific wavelength LED |
| CN109060734A (en) * | 2018-06-19 | 2018-12-21 | 江苏大学 | The zearalenone visualization fast screening system and method for fluorescence imaging |
| CN113109341A (en) * | 2021-04-08 | 2021-07-13 | 云南农业大学 | Quick detection device of potato disease |
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Application publication date: 20151014 |
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| WD01 | Invention patent application deemed withdrawn after publication |