CN203465200U - Fluorescence-spectrum detecting device for pesticide residues - Google Patents
Fluorescence-spectrum detecting device for pesticide residues Download PDFInfo
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- CN203465200U CN203465200U CN201320353815.9U CN201320353815U CN203465200U CN 203465200 U CN203465200 U CN 203465200U CN 201320353815 U CN201320353815 U CN 201320353815U CN 203465200 U CN203465200 U CN 203465200U
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- detecting device
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- spectrum detecting
- pesticide residue
- fluorescence
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- 239000000447 pesticide residue Substances 0.000 title claims abstract description 26
- 238000002189 fluorescence spectrum Methods 0.000 title claims abstract description 21
- 235000013311 vegetables Nutrition 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims description 17
- 239000002699 waste material Substances 0.000 claims description 12
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 14
- 230000003287 optical effect Effects 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 230000010354 integration Effects 0.000 abstract 2
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- 238000001914 filtration Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
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- 239000003905 agrochemical Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000575 pesticide Substances 0.000 description 3
- 238000002203 pretreatment Methods 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000003018 immunoassay Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000695 excitation spectrum Methods 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003987 organophosphate pesticide Substances 0.000 description 1
- 230000000361 pesticidal effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003822 preparative gas chromatography Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The utility model discloses a fluorescence-spectrum detecting device for pesticide residues. The fluorescence-spectrum detecting device comprises a high-brightness LED (Light Emitting Diode) module, wherein a dodging integration rod is arranged in front of the high-brightness LED module; a driving circuit is arranged behind the high-brightness LED module; a focusing lens is arranged in front of the dodging integration rod; vegetable stems and leaves are placed beside the focusing lens; a coupling lens is arranged at the other side of the vegetable stems and leaves; and a filtering piece group and a light-sensitive element are sequentially arranged behind the coupling lens. According to the technical scheme, the fluorescence-spectrum detecting device disclosed by the utility model has the beneficial effects that by adoption of a novel narrow-band multispectral LED light source, the emission of a plurality of narrow-band optical wavelengths can be realized by single light-source module, and the coverage of broadband and narrow-band light, which can be realized by combination of a plurality of light sources in the traditional device, can be realized; and the cost of the system is greatly reduced. The fluorescence-spectrum detecting device disclosed by the utility model has the advantages of high sensitivity, low sample usage, fastness, good reproducibility and non-destructive performance and the like and has wide application prospect on the aspect of detection of trace substances, especially pesticide residue.
Description
Technical field
The utility model belongs to the optical detection field of trace materials, is specifically related to a kind of pesticide residue fluorescence spectrum detecting device.
Background technology
At present, China's food-safety problem is outstanding, and agricultural chemicals abuse problem is serious.Conventional Detecting Pesticide method has vapor-phase chromatography (GC), high performance liquid chromatography (HPLC), thin-layered chromatography (TLC), immunoassay, enzyme to suppress the methods such as method, biology sensor detection.Although technology maturation, accuracy of detection is high, loaded down with trivial details to the pre-treatment of sample, needs large apparatus to detect, and mostly has destructiveness, is difficult to meet Pesticide Residues in Vegetables is realized to field quick detection.If directly carry out nondestructive quick, easy measurement using the fruit of agricultural chemicals, vegetable surface, that will be work very good and with practical value.Study a kind of fast, the residual detection technique of the simple agriculture of pre-treatment becomes current problem demanding prompt solution.
The utility model is attached to the surperficial pesticide residue of vegetables, fruit after for applying pesticides, research effects on surface directly carry out nondestructive fast, the residual detection technique of the simple agriculture of pre-treatment.Utilize pesticide residue under UV-irradiation, the characteristic fluorescence excitation peak of generation, adopts fluorescence spectrum detection technique qualitative detection organophosphorus pesticide thing.
As shown in Figure 1, traditional pesticide residue fluorescence spectrum detection threshold scaling experiment schematic diagram, driving circuit is controlled high-brightness LED light source, select as required suitable excitation spectrum wave band, first the light of chip transmitting pass through even smooth integrating rod, obtain uniform light outgoing, be coupled into optical fiber and be transferred on vegetable waste to be measured, form some illumination and excite.On vegetable waste, there is the agricultural chemicals of concentration known of prior coating air-dry residual, exciting light irradiates and produces fluorescence, simultaneous reflected light signal, optical fiber is illumination reception one optical fiber, and light signal receives by optical fiber, is transferred to coupled lens, be coupled into spectrometer, form the benchmark comparison data of the characteristic fluorescence spectrum of agricultural chemicals to be measured, and by experiment and national standard (as GB/T 19648-2006), obtain the spectrum threshold data that pesticide residue exceeds standard.
Compare the method the utility model proposes with traditional spectrum detection technique and mainly contain two innovative points: one, adopted multispectral section of arrowband LED light source, single light source module can be realized the transmitting of a plurality of narrow band light wavelength, realizes the broadband narrow band light covering that traditional a plurality of combination of light sources could realize; Two, adopt the mode of optical filter and light activated element combination, replaced the expensive spectrometer of traditional employing, greatly reduce system cost.Embodiment will be introduced in detail in utility model content.
Utility model content
The purpose of this utility model is to overcome the problem that prior art exists, a kind of pesticide residue fluorescence spectrum detecting device is provided, this pick-up unit adopts multispectral section of arrowband LED light source, and single light source module can be realized the broadband narrow band light covering that traditional a plurality of combination of light sources could realize; And the mode combining with optical filter and light activated element, replaced traditional expensive spectrometer, greatly reduce system cost.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A kind of pesticide residue fluorescence spectrum detecting device, comprise described in high-brightness LED module that high-brightness LED module the place ahead is provided with even smooth integrating rod, described high-brightness LED module rear is provided with driving circuit, before described even smooth integrating rod, be placed with vegetable waste, at described vegetable waste another side, be provided with coupled lens, be disposed with filter set and light activated element after described coupled lens.
Further, described high-brightness LED module comprises high thermal conductive substrate and LED chip, described high thermal conductive substrate is metal substrate or ceramic substrate, on described high thermal conductive substrate, be provided with LED chip, described LED chip is the LED chip of the different centre wavelengths of at least two groups, and the quantity of described every group of LED chip is at least one.
Further, the incident port shape of described even smooth integrating rod is identical with light source luminescent face shape, is shaped as rectangle, cylindrical or taper.
The combination of the bandpass filter that further, described filter set is multiple different centre wavelengths.
Further, described light activated element is photoresistance, photodiode, cmos device or CCD device.
Compared with prior art, the beneficial effects of the utility model are:
1, adopt Spectrographic detection mode, directly object under test is carried out to irradiation detection, the sample preparation means that do not need gas, liquid chromatography complexity, do not need needed a large amount of reagent consumptive materials such as immunoassay, enzyme inhibition method yet, be a kind of pre-treating method simply, onthe technology of site test fast.
2, adopted multispectral section of arrowband LED light source, single light source module can be realized the transmitting of a plurality of narrow band light wavelength, realizes the broadband narrow band light covering that traditional a plurality of combination of light sources could realize, and has dwindled system bulk, has realized portable design.
3, adopt the mode of optical filter and light activated element combination, replaced the expensive spectrometer of traditional employing, greatly reduce system cost.
Accompanying drawing explanation
A kind of pesticide residue fluorescence spectrum of Fig. 1 the utility model detection threshold scaling experiment schematic diagram;
Fig. 2 high-brightness LED light-source structure schematic diagram;
A kind of pesticide residue fluorescence spectrum detecting device of Fig. 3 the utility model principle schematic;
A kind of pesticide residue fluorescence spectrum of Fig. 4 the utility model detects another principle of device schematic diagram.
Number in the figure explanation: 1, high-brightness LED module, 2, even smooth integrating rod, 3, condenser lens, 4, coupled lens, 5, light activated element, 6, driving circuit, 7, filter set, 8, high thermal conductive substrate, 9, LED chip, 10, vegetable waste.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Shown in Fig. 4, a kind of pesticide residue fluorescence spectrum detecting device, comprise high-brightness LED module 1, described high-brightness LED module 1 the place ahead is provided with even smooth integrating rod 2, described high-brightness LED module 1 rear is provided with driving circuit 6, before described even smooth integrating rod 2, be placed with vegetable waste 10, at described vegetable waste 10 another sides, be provided with coupled lens 4, described coupled lens 4 is disposed with filter set 7 and light activated element 5 below.
Further, as shown in Figure 2, described high-brightness LED module 1 comprises high thermal conductive substrate 8 and LED chip 9, described high thermal conductive substrate is metal substrate or ceramic substrate, on described high thermal conductive substrate 8, be provided with LED chip 9, described LED chip is the LED chip of the different centre wavelengths of at least two groups, and the quantity of described every group of LED chip 9 is at least one; Described LED chip 9 is directly fixedly connected on described high thermal conductive substrate 8 for common anode electrode structure and described LED chip 9.
Preferably, the centre wavelength scope of described 9 LED chips 9 contains ultraviolet band to infrared band, is provided with separately independently control circuit and controls separately; Described control circuit comprises the on-off circuit of the connecting and disconnecting of the circuit that can control corresponding group LED chip 9, also comprises the current control circuit of the electrical current size of controlling this group LED chip 9; Under driving circuit 6 is controlled, single or multiple LED chips 9 are realized light outgoing.
Further, the incident port shape of described even smooth integrating rod 2 is identical with light source luminescent face shape, is shaped as rectangle, cylindrical or taper.
The combination of the bandpass filter that further, described filter set 7 is multiple different centre wavelengths.
Further, described light activated element 5 is photoresistance, photodiode, cmos device or CCD device.
Principle of the present utility model:
High-brightness LED module 1 is controlled through driving circuit 6, select the chip light emitting of suitable centre wavelength, the arrowband band of light energy of transmitting, enter even smooth integrating rod 2, after multiple total reflection, by unified light-emitting window, by condenser lens 3, exciting light is focused on vegetable waste to be measured, the reflected light being sent by vegetable waste again and exciting light, being coupled lens 4 collects, through filter set 7, filter, focus on light activated element 5, form light signal, wherein, the combination of the bandpass filter that filter set 7 is a plurality of different centre wavelengths, agricultural chemicals spectral characteristic to be measured is selected corresponding optical filter, the light signal that light activated element 5 obtains is near light intensity respective filter centre wavelength, when light intensity surpasses setting threshold, pesticide residue is excessive, when lower than threshold value, pesticide residue does not exceed standard, and threshold value obtains by the proportioning test of the pesticidal solutions of variable concentrations.
Embodiment of the present utility model:
Embodiment mono-:
The principle of the present embodiment and classic method is similar, all adopt optical fiber to carry out light transmission, difference is, in the present embodiment, coupled lens 4 is provided with filter set 7 and light activated element 5 below, has replaced original spectrometer, by the selection of optical filter suitable in optical filter 7, obtain the spectral intensity to be measured of corresponding pesticide residue, according to the comparison of the spectral intensity recording and threshold value, whether sizing is measured pesticide residue and is exceeded standard.
Embodiment bis-:
As shown in Figure 4, the present embodiment is the compact design structure of embodiment mono-pick-up unit.Two embodiment principle of work are similar, difference is mainly, the present embodiment does not adopt the optical fiber of price comparison costliness, but by the light of even smooth integrating rod 2 outgoing, by being arranged on even smooth integrating rod 2 condenser lens 3 above, directly on vegetable waste 10 to be measured, forming electric light source excites, the fluorescence of residues of pesticides deposits yields, by coupled lens 4, through the filter set 7 laggard light activated element 5 that enters that filters, by the fluorescent characteristics peak intensity and the threshold intensity that relatively record, whether qualitative definite pesticide residue exceeds standard.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a pesticide residue fluorescence spectrum detecting device, comprise high-brightness LED module (1), it is characterized in that, described high-brightness LED module (1) the place ahead is provided with even smooth integrating rod (2), described high-brightness LED module (1) rear is provided with driving circuit (6), the front vegetable waste (10) that is placed with of described even smooth integrating rod (2), at described vegetable waste (10) another side, be provided with coupled lens (4), described coupled lens (4) is disposed with filter set (7) and light activated element (5) below.
2. pesticide residue fluorescence spectrum detecting device according to claim 1, it is characterized in that, described high-brightness LED module (1) comprises high thermal conductive substrate (8) and LED chip (9), described high thermal conductive substrate (8) is metal substrate or ceramic substrate, described high thermal conductive substrate is provided with LED chip on (8), described LED chip (9) is the LED chip of the different centre wavelengths of at least two groups, and the quantity of described every group of LED chip (9) is at least one.
3. pesticide residue fluorescence spectrum detecting device according to claim 1, is characterized in that, the incident port shape of described even smooth integrating rod (2) is identical with light source luminescent face shape, is shaped as rectangle, cylindrical or taper.
4. pesticide residue fluorescence spectrum detecting device according to claim 1, is characterized in that, the combination of the bandpass filter that described filter set (7) is multiple different centre wavelengths.
5. pesticide residue fluorescence spectrum detecting device according to claim 1, is characterized in that, described light activated element (5) is photoresistance, photodiode, cmos device or CCD device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320353815.9U CN203465200U (en) | 2013-06-20 | 2013-06-20 | Fluorescence-spectrum detecting device for pesticide residues |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320353815.9U CN203465200U (en) | 2013-06-20 | 2013-06-20 | Fluorescence-spectrum detecting device for pesticide residues |
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| Publication Number | Publication Date |
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| CN203465200U true CN203465200U (en) | 2014-03-05 |
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| CN201320353815.9U Expired - Fee Related CN203465200U (en) | 2013-06-20 | 2013-06-20 | Fluorescence-spectrum detecting device for pesticide residues |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424387A (en) * | 2013-06-20 | 2013-12-04 | 中国科学院苏州生物医学工程技术研究所 | Fluorescence spectrum detection device for pesticide residue |
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2013
- 2013-06-20 CN CN201320353815.9U patent/CN203465200U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424387A (en) * | 2013-06-20 | 2013-12-04 | 中国科学院苏州生物医学工程技术研究所 | Fluorescence spectrum detection device for pesticide residue |
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Granted publication date: 20140305 |
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| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: On July 7, 2023, the expiration and termination of the 39 volume 2702 patent Number: 27-02 Volume: 39 |
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| CU01 | Correction of utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 |
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| CF01 | Termination of patent right due to non-payment of annual fee |