CN204008454U - Portable near infrared spectrometer for detection of mould index in storage paddy - Google Patents

Portable near infrared spectrometer for detection of mould index in storage paddy Download PDF

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Publication number
CN204008454U
CN204008454U CN201420456381.XU CN201420456381U CN204008454U CN 204008454 U CN204008454 U CN 204008454U CN 201420456381 U CN201420456381 U CN 201420456381U CN 204008454 U CN204008454 U CN 204008454U
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China
Prior art keywords
portable
detection
paddy
infrared spectrometer
detecting
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Expired - Fee Related
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CN201420456381.XU
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Chinese (zh)
Inventor
郑先哲
张强
刘成海
孙井坤
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Northeast Agricultural University
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Northeast Agricultural University
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Abstract

Portable near infrared spectrometer for detection of mould index in storage paddy belongs to grain detection technique field.This instrument comprises that measuring sonde, optical system, control computing machine and display panels form, and controls computing machine and is connected with detecting device with display panels respectively through transmission line, can use this instrumental analysis paddy sample to be measured.The utility model adopts portable light source and fibre-optical probe, the systems such as integrating sphere and sample chamber have been saved, simplified apparatus structure, harmless, the online detection that is suitable for granular material analyzed, have simple in structure, volume is little, analysis efficiency is high, simple operation and other advantages.

Description

Portable near infrared spectrometer for detection of mould index in storage paddy
Technical field
The utility model belongs to grain checkout equipment, and a kind of portable dedicated near infrared rice quality that utilizes near-infrared spectrum technique to detect, analyze mould index detects analyser specifically.
Background technology
Paddy is one of staple food crop of China, and along with socioeconomic development, its quality more and more receives people's concern.Due to the impact of holding conditions, rice quality can decline, and grows some poisonous and harmful microorganisms, such as mould, Aspergillus glaucus, aspergillus flavus etc., even can produce the aflatoxin very large to harm, consumer's health is brought to potential hazard, grain security be produced to material impact simultaneously.How fast, harmless, accurately to detect mould and toxin in paddy be this field worker's problem demanding prompt solution always in paddy, mould and toxin are fast, Non-Destructive Testing is subject to the attention of the units such as scientific research institutions, quality testing department, state-owned large granary and grain processing enterprise day by day.
As everyone knows, since the eighties in 20th century, near-infrared spectrum technique is compared without any pre-service with conventional biological and chemical analytical approach because of it, and analysis speed is fast, pollution-free, so be used widely at grain quality detection field.Along with the development of computer technology and Chemical Measurement, near-infrared spectrum technique application is also more and more extensive in recent years, for Analysis of Complex offering sample may.Due near infrared at the scene and on-line analysis field application increasingly extensive, near-infrared analyzer is constantly to customizations, miniaturization, solid state, modularization and future development in real time fast.Patent discloses No. 201177600 and discloses a kind of Portable near-infrared detector.This utility model comprises the devices such as light-source system, beam splitting system, sample chamber and detecting device, and this instrument sample room comprises objective table and integrating sphere, and complex structure is not suitable for online and Site Detection.Patent discloses and discloses a kind of near infrared grain component analyser for No. 103353438.Comprise the structures such as sample chamber, near infrared light path system, transmitted light collection system, master system and control module.Patent discloses No. 101055245 and discloses a kind of portable near infrared spectrometer for soybean quality detection.This instrument comprises that light source, sampling system, beam splitting system, signals collecting, single-chip microcomputer and host computer form, and wherein sampling system comprises rotary sample chamber and stepper motor, and complex structure is not suitable for online and Site Detection.
Above-mentioned existing patented technology designs corresponding near-infrared analyzer for individually defined thing material Quality Detection, has the problems such as complicated structure, difficulty of processing are large, simplifies apparatus structure, and improving analysis speed is near-infrared analyzer design problem demanding prompt solution.
Summary of the invention
The shortcoming that the utility model exists for above prior art, provide a kind of portable near infrared spectrometer for detection of mould index in storage paddy, the object that reach simple in structure, easy to detect, analysis efficiency is high, is applicable to scene and detects online.
The purpose of this utility model realizes by following scheme:
For detection of the portable near infrared spectrometer of mould index in storage paddy, described analyser is comprised of measuring sonde, optical system, control computing machine and display panels; Described optical system comprises that light source, beam splitting system and detecting device form, control computing machine and comprise A/D converter and microprocessor, described A/D converter is connected with microprocessor, measuring sonde is connected with light source, light source is connected with beam splitting system, detecting device is connected with beam splitting system, controls computing machine and is connected with display panels with detecting device respectively through transmission line.
Feature of the present utility model is to change sample chamber into fibre-optical probe, light source adopts portable light source, thereby simplified instrument overall volume and size, to reduce the difficulty of processing of portable light spectrometer, the fibre-optical probe structure of proposition is suitable for the granular material scenes such as paddy and online detection.The utility model is by mould index in microprocessor analysis paddy, and fibre-optical probe and portable annular light source embody the feature of the application's portable devices formula.
Accompanying drawing explanation
Fig. 1 is the structural representation for detection of the portable near infrared spectrometer of mould index in storage paddy.
Piece number explanation in figure: 1, light source 2, measuring sonde 3, beam splitting system 4, detecting device 5, A/D converter 6, microprocessor 7, display panels 8, optical system 9, control computing machine
Embodiment
Below in conjunction with accompanying drawing, the utility model optimum implementation is described in detail.
For detection of a portable near infrared spectrometer for mould index in storage paddy, described analyser is comprised of measuring sonde 2, optical system 8, control computing machine 9 and display panels 7; Described optical system 8 comprises that light source 1, beam splitting system 3 and detecting device 4 form, control computing machine 9 and comprise A/D converter 5 and microprocessor 6, described A/D converter 5 is connected with microprocessor 6, measuring sonde 2 is connected with light source 1, light source 1 is connected with beam splitting system 3, detecting device 4 is connected with beam splitting system 3, controls computing machine 9 and is connected with display panels 7 with detecting device 4 respectively through transmission line.
Light source 1 is portable annular light source.
Measuring sonde 2 is fibre-optical probe.
Detecting device 4 adopts InGaAs array detector.
During the utility model work, measuring sonde 2 is contacted with material to be measured, carry after diffusing of sample message collected by measuring sonde 2 and deliver to beam splitting system 3, after light splitting, by detecting device 4, light signal is converted to electric signal, after A/D converter 5 conversions, be sent to microprocessor 6 again, draw absorption spectra data, and show and directly obtain detecting analysis result by its spectrogram.
During the utility model test, selecting paddy is raw material, and scanning optical spectrum also directly obtains analysis result.Get 30 paddy samples to be measured.Adopt national standard food microbiological analysis-Molds and yeasts method of counting to measure mold colony sum in paddy.Before scanning, naturally dry in the shade to paddy moisture stabilization at 10%-14%; At 25 ℃, open the portable near infrared spectrometer for detection of mould index in storage paddy, preheating 30min, contacts fibre-optical probe with paddy seed; Adopt diffuse reflection type collection spectrum, spectral scan scope 1100nm~2500nm, scanning times 64 times, resolution 8cm -1, sample multiple scanning 3 times, active balance sample distribution inhomogeneous, grain size and the shape difference of outgoing spectroscopic data under objective condition such as change, obtains measurement result more accurately.Average as near infrared spectrum data and the measurement result of sample, utilize the mathematical model embedding, the mold colony sum of 30 rice samples is predicted, investigate precision of prediction and robustness and the instrument detection effect of existing mathematical model.Measured value, chemical score and residual result are in Table 1.
Table 1: mold colony sum Quantitative Analysis Model external certificate result
As shown in Table 1, the checking related coefficient of modelling verification measured value and chemical score is 0.947, and prediction standard deviation RMSEP is 33963, and residual error mean value is 18.From the above results, portable near infrared spectrometer testing result for detection of mould index in storage paddy of the present utility model is good, measurement result is close with corresponding stoichiometric number height, can reach the application requirements of Site Detection completely, have more the advantage that calibration no longer needs to provide sample chemical score simultaneously, because this utility model has embedded existing mathematical model, therefore do not need modeling, can save manpower, material resources and time resource, improved analysis efficiency greatly.

Claims (4)

1. for detection of a portable near infrared spectrometer for mould index in storage paddy, it is characterized in that: described analyser is comprised of measuring sonde (2), optical system (8), control computing machine (9) and display panels (7); Described optical system (8) comprises that light source (1), beam splitting system (3) and detecting device (4) form, control computing machine (9) and comprise A/D converter (5) and microprocessor (6), described A/D converter (5) is connected with microprocessor (6), measuring sonde (2) is connected with light source (1), light source (1) is connected with beam splitting system (3), detecting device (4) is connected with beam splitting system (3), controls computing machine (9) and is connected with display panels (7) with detecting device (4) respectively through transmission line.
2. the portable near infrared spectrometer for detection of mould index in storage paddy according to claim 1, is characterized in that: light source (1) is portable annular light source.
3. the portable near infrared spectrometer for detection of mould index in storage paddy according to claim 1, is characterized in that: measuring sonde (2) is fibre-optical probe.
4. the portable near infrared spectrometer for detection of mould index in storage paddy according to claim 1, is characterized in that: detecting device (4) adopts InGaAs array detector.
CN201420456381.XU 2014-08-08 2014-08-08 Portable near infrared spectrometer for detection of mould index in storage paddy Expired - Fee Related CN204008454U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420456381.XU CN204008454U (en) 2014-08-08 2014-08-08 Portable near infrared spectrometer for detection of mould index in storage paddy

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Application Number Priority Date Filing Date Title
CN201420456381.XU CN204008454U (en) 2014-08-08 2014-08-08 Portable near infrared spectrometer for detection of mould index in storage paddy

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109073546A (en) * 2016-02-24 2018-12-21 陶朗分拣股份有限公司 For detecting the existing method and apparatus of mycotoxin in cereal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109073546A (en) * 2016-02-24 2018-12-21 陶朗分拣股份有限公司 For detecting the existing method and apparatus of mycotoxin in cereal

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20141210

Termination date: 20160808