CN205506679U - Portable near infrared spectroscopy detecting system - Google Patents
Portable near infrared spectroscopy detecting system Download PDFInfo
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- CN205506679U CN205506679U CN201620034575.XU CN201620034575U CN205506679U CN 205506679 U CN205506679 U CN 205506679U CN 201620034575 U CN201620034575 U CN 201620034575U CN 205506679 U CN205506679 U CN 205506679U
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Abstract
The utility model relates to an infrared spectrum detects technical field, concretely relates to portable near infrared spectroscopy detecting system, including the casing, install acquisition window, light sources, beam splitting device and detector in the casing in proper order, still install converter and power supply unit in the casing, the output of detector with the input of converter is connected, and power supply unit is connected with light sources, detector and converter respectively, still include the sample cell, the sample cell includes sapphire sampling contact surface and fixing base, be formed with cavity and both ends in the fixing base and be provided with the opening, the one end opening fixed mounting of fixing base on acquisition window, fixed mounting on the other end opening sapphire sampling contact surface, beam splitting device is linear graduated filter. The utility model discloses a portable near infrared spectroscopy detecting system under the condition that does not enlarge equipment volume and weight, improves greatly and detects the precision, has solved the problem of model migration difficulty.
Description
Technical field
This utility model relates to infrared spectrum detection technique field, is specifically related to a kind of portable near infrared spectrum detecting system.
Background technology
Near-infrared spectral analysis technology (Near Infrared, NIR) it is the electromagnetic radiation as waves between visible ray (Vis) and mid-infrared (MIR), U.S. material detection association (ASTM) nearly infrared spectral region is defined as the region of 780-2526nm, is first non-visible light district finding in absorption spectrum of the mankind.Near infrared spectrum district is consistent with the uptake zone of the sum of fundamental frequencies that hydric group in organic molecule (OH, NH, CH) vibrates and frequency multiplication at different levels, by scanning the near infrared spectrum of sample, the characteristic information of organic molecule hydric group in sample can be obtained, and utilize near-infrared spectrum technique analyze sample have easily and fast, efficiently, accurately relatively low with cost, do not destroy sample, not consuming chemical reagent, the advantage such as free from environmental pollution, therefore this technology is favored by more and more people.
Near infrared technology is based on the quantitative determination that the absorption characteristic of near infrared region spectrum is carried out by a certain chemical composition, so the key problem in technology that application NIR spectra carries out detecting is exactly to set up a kind of quantitative functional relationship between.Its basic procedure includes: first collect representative sample, and its composition and excursion thereof, close to sample to be analyzed, then gather the optical data of sample；The chemical method utilizing standard carries out chemical constituents determination to sample；By mathematical method, the data of these spectroscopic datas and detection are associated, typically spectroscopic data are carried out single order or second dervative conversion, carries out regression Calculation with chemical measurements, then draw calibration equation, founding mathematical models；When analyzing unknown sample, being first scanned testing sample, the model set up according to spectral value can calculate the component content of testing sample.The process determining regression model is exactly calibration process in fact, and the quality of calibration is directly connected to precision of analysis, and therefore, calibration software is the core of NIR technology.Calculated calibration equation must measure accuracy and the accuracy adjusting it by reality.Accuracy refers to close degree during replication between measured value.The prediction standard error (SEP) measuring usual calibration equation of accuracy represents.SEP represents the close degree between measured value and " true value ".Near infrared light is to after sample, and the light reflected from sample surfaces is absorbed by detector, and this is near-infrared spectral reflectance analytic process (NIR).It requires that the degree of grinding of sample is consistent, thus ensures that sample surfaces is smooth unanimously.Another kind of for near-infrared through after sample, then detected by acceptance, be near-infrared projection light Zymography (NIT).This method advantage is that therefore repeatability is higher, but sensitivity is low with little or no with preparing sample.Present near infrared spectrometer type of merchandize is more, predominantly Fourier transform, raster scanning, acousto-optic scanning and photovoltaic array fixed light path type.Bran & Luebbe of Germany (Technicon) produces all types of instrument in near-infrared field, including optical filtering flap-type, raster scan type, Fourier transform, AOFT acousto-optic modulation near-infrared etc..
Near-infrared analyzer is applied in agricultural product feature detection, including fruit damage check, fruit identification, plant growing information measurement.Different based on agricultural product internal component and external behavior, different absorptions or reflection is had under different wave length light irradiates, according to this characteristic, if the filter lens of selected certain wavelength, just fruit normal segments and damaged portion or fruit and the contrast of leaf can be strengthened in acquisition image, so that the detection of fruit damage and feature extraction the most easily utilize near infrared diffuse-reflectance image quickly to detect the defect of Fructus Mali pumilae, the difficulty that the main defect area using multi-wavelength to solve fruit fruit face and stalk calyx depressed area identify.
Strict due to the restriction of technical merit and examination criteria, for ensureing detection quality, the most common near infrared detection equipment is by Fourier Transform Technique, but employing Fourier Transform Technique, by time and Influence of Displacement, the most near infrared beam splitting system needs larger space, therefore equipment and the volume of product and weight cannot diminish, and the most existing near infrared detection equipment presents the shortcomings such as volume is big, weight is big, cost is high, application scenarios limitation mostly.
Along with the development of science and technology, the real-time live for soft substrate or solid sample (such as: Fructus Mali pumilae etc.) detects.Occur in that Portable near infrared detects equipment both at home and abroad successively.Equipment by: acquisition window, light source, beam splitting system, detector, operation sequence and electric power system form.Wherein: acquisition window uses optical fiber, light source employing halogen tungsten lamp, beam splitting system employing grating or integrating sphere, detector to use CCD, operating system to use flush type LINUX, electric power system to use such as lithium battery or portable power source etc..For the angle of application client, near infrared detection equipment solves the problem in that and carries out the Non-Destructive Testing that sample is qualitative and quantitative in the case of not destroying sample, such as Fructus Mali pumilae, the purpose of qualitative Non-Destructive Testing is to know the place of production of this sample and brand, plays tracing and the true and false effect of sample.The purpose of quantitative NDT is to know the various constituent contents of this sample, such as BRIX-soluble solid etc., but the Portable near infrared detection equipment detected for soft substrate or solid sample of the prior art still suffers from problems with: 1, soft substrate or solid sample have particularity, when spectra collection less due to fibre-optical probe contact surface, it is impossible to collect representative sample message；2, for qualitative analysis and detection, the most relatively low with type equipment precision, cause testing result bigger with actual result error；3, Portable near infrared of the prior art detection equipment Inspection result is the most unstable, causes result without availability；4, must calibrate before use due near infrared detection equipment, the principle of calibration is the different attribute according to equipment and precision, Natural light intensity is acquired, and gather maximum absorbance with calibration module, to determine the time of integration, but existing Portable near infrared detection equipment is due to the factor of natural light, and the uncertain factor causing calibration is reliable more, it is impossible to accurately obtain testing result.
As can be seen here, can be for deficiency of the prior art, there is provided that a kind of precision is higher, low price, small volume, lighter in weight, continuous working period are longer, Consumer's Experience sense the most novel Portable near infrared based on soft substrate or solid sample detection equipment, become the technical problem that those skilled in the art are urgently to be resolved hurrily.
Utility model content
This utility model is in order to solve above-mentioned technical problem, it is provided that a kind of portable near infrared spectrum detecting system, it is possible to effectively realize the infrared spectrum detection of soft substrate or solid sample, carry out qualitative and quantitative analysis, simple to operate, measure quickly, measurement result is accurately and reliably.
In order to reach above-mentioned technique effect, this utility model includes techniques below scheme:
A kind of portable near infrared spectrum detecting system, the acquisition window that including housing, is arranged on housing, be sequentially arranged at housing in and the detection light source, light-dividing device and the detector that are located along the same line with described acquisition window, transducer and electric supply installation it is also equipped with in described housing, the outfan of described detector is connected with the input of described transducer, and described electric supply installation is connected with detection light source, detector and transducer respectively；Also include sample cell, described sample cell includes sapphire sample contact face and fixing seat, it is formed with chamber in described fixing seat and two ends are provided with opening, the one end open of described fixing seat is fixedly mounted on acquisition window, fixedly mounting described sapphire sample contact face on other end opening, described light-dividing device is linear variable filter.
Described fixing seat is that aluminum alloy materials is made, and it is screwed onto on described acquisition window.
When needs detect soft substrate or solid sample, have only to that sapphire sample contact face direct contact measured sample carries out detect light source surface sweeping detect, the sample that described detection light source irradiates in described sampling member obtains optical signal through slow reflection, described optical signal enters linear variable filter and obtains light beam through dispersion, described detector receives that described light beam is converted obtains the signal of telecommunication, and by described signal of telecommunication output to transducer, described transducer exports after the described signal of telecommunication received is converted to spectroscopic data.
Optical fiber type of the prior art (diameter 5mm) acquisition window, owing to window is less, causes the standardisation requirements that spectral information is local message, not up to sample collecting obtained, owing to solid sample is relatively hard, rough surface.When gathering, spectral information limitation causes OH, NH, CH chemical group quantity of information in the spectrum obtained impacted, causes the spectrum of collection without representativeness.Prior art use grating or integrating sphere as beam splitting system simultaneously, during sampling and detection, light source is by sample surface and during OH, NH, CH chemical group information is returned to beam splitting system by the form of diffuse-reflectance or transmission, owing to grating or integrating sphere principle limit, if being stopped near or below the object of wavelength by a size, just walk around this object, proceed.If be bordering on or be less than the hole of wavelength by a size, then centered by hole, form circumferential wave and propagate forward.Causing deflection angle in sampling process the least, wavelength is the longest, and spectra overlapping, thus interferes bigger.
This utility model sample cell is the structure of autonomous Design for soft substrate or solid sample characteristic, its reasonable in design, use can be mated with bigger acquisition window, weak output signal when solving employing optical fiber, need the problem that the most irreflexive optical information is carried out adding up by integrating sphere.Soft substrate or solid sample can directly be contacted by sample pool structure of the present utility model design with acquisition window, owing to have employed sapphire sample contact face, therefore serve the effect of protection acquisition window, thus ensure to detect kind and the quality of sample.
Application linear variable filter, solves owing to spectrum correspondence spectrum segment exists the impact of spectra overlapping, causes the problem that precision is relatively low.
Further, described housing being connected with lid, described lid is located at outside described sample cell.
Further, described detector is 128 line element non-brake method indium Ga-As diode array detectors, and described transducer is A/D converter.
Apply 128 line element non-brake method indium gallium arsenic (inGaAs) diode arrays, will not occur due to accumulative care, cause detector temperature too high thus cause the relatively low impact of precision.And reduce spectral signal-noise ratio impact so as to get original spectrum more stable, efficient.
Further, described light source is double integrated vacuum tungsten lamps.Double integrated vacuum tungsten light source life-spans are more than 1.7 ten thousand hours, solve light source problem in service life.
Further, described electric supply installation is rechargeable battery, and described housing is provided with charging plug.A described battery that fills is lithium battery, continuous standby and operating time 8 hours, solves the short problem of traditional product stand-by time.
Further, described housing being provided with on and off switch, described on and off switch is connected with described electric supply installation.
Further, the spectral region of described linear variable filter is 900～1700nm.
Legacy equipment wave band is 700nm-1100nm, and spectral coverage is limited, the chemical group the most useless limited problem of the spectral information reaction of sample occurs, causes model to set up the problem that error maybe cannot model relatively greatly.Integrated by software and hardware, this patent wave-length coverage 900-1700nm, add wave band, improve the chemical group of spectral information reaction.Make model more accurate.
Further, described portable near infrared spectrum detecting system also includes the client that micro-central controller is connected with described micro-central controller radio communication, described micro-central controller is arranged in housing, described micro-central controller is connected with described electric supply installation, detection light source, detector and transducer, spectroscopic data after described transducer is changed by described micro-central controller transmits to client, and the control signal receiving described client transmissions controls described detection light source, detector and the opening and closing of transducer.
Further, described client includes calibration module, detection module and the data disaply moudle chosen the most successively；
Client is made to send a control signal to micro-central controller by choosing calibration module, the calibration spectrum data of described micro-central controller receiving converter output, and described calibration spectrum data are exported to client, described data disaply moudle is used for showing calibration spectrum data；
Client is made to send a control signal to micro-central controller by choosing detection module, the detection spectroscopic data of described micro-central controller receiving converter output, and described detection spectroscopic data is exported to client, described data disaply moudle is used for showing detection spectroscopic data.
Further, described portable near infrared spectrum detecting system also includes cloud database, described cloud database communicates to connect with described client wireless, described cloud database internal memory contains the chemometric model of detected sample, the spectroscopic data received is exported to cloud database by described client, qualitative data and the quantitative data obtaining testing sample is analyzed in the chemometric model comparison of the described spectroscopic data received with detected sample by described cloud database, and sends described qualitative data and quantitative data to client.
Further, described detection spectroscopic data is exported to cloud database by described detection module, qualitative data and the quantitative data obtaining testing sample is analyzed in the chemometric model comparison of the described detection spectroscopic data received with detected sample by described cloud database, and described qualitative data and quantitative data are sent to data disaply moudle, described data disaply moudle is used for showing qualitative data and quantitative data.
Further, described qualitative data includes place of production information and kind information, and described quantitative data includes soluble solid quantitative value and sugariness numerical value.But the qualitative data that system of the present utility model is detected and quantitative data are not limited to above-mentioned cited information.
Chemometric model being placed on high in the clouds, it is achieved Internet of Things theory so that accuracy of detection is higher, better, it is the most convenient to use.Limitation and the principle factor of technology is examined soon due to near-infrared, the technical parameter causing every equipment room has certain error (such as: if gathering spectroscopic data with A equipment and setting up model, certain error is there will be when B device uses this model, cause the testing result inaccurate), for solving this problem, this utility model utilizes autonomous research algorithm to solve the error problem of equipment room, it is achieved model multiple devices use the technical barrier of 0 error.
Chemical Measurement has become as the indispensable important component part in near-infrared spectrum analysis.Principal component analysis (PCA) and offset minimum binary (pLS) are classical chemometrics methods, are also most common methods in near-infrared spectrum analysis.PCA is the method commonly used in near-infrared qualitative and quantitative analysis, its main purpose is Data Dimensionality Reduction, to eliminate part overlapped near infrared light spectrum information, it is to covariance maximum direction projection by spectroscopic data, obtain the new variables of the Nomenclature Composition and Structure of Complexes information reflecting sample to the limit, but owing to projection process is uncorrelated with dependent variable, general forecast precision is the highest.Setting up model with PLS, it is possible to use all sample is analyzed by the information of spectrum, decomposition and the recurrence of light spectrum matrix are carried out alternately, owing to the non-linear meeting of spectrum causes over-fitting, therefore the application near infrared spectrum is restricted sometimes.
Support vector machine is used near infrared spectrum and can effectively improve Expired Drugs, and it allows high dimensional data as input vector, can solve the spectrum nonlinear change problem that the variablees such as temperature cause well.Therefore, for each chemometrics method, there are respective merits and demerits, possible somewhat prohibitive near infrared light time spectrum.Have researcher at present these methods to be combined with each other, learn from other's strong points to offset one's weaknesses, then be applied in near-infrared spectral analysis technology.
Further, the one during described client is computer, panel computer and mobile phone.
The operating system of client uses ios and Android APP program, and compared with PC, LINUX program of traditional product, customer experience sense is more preferable, and UI is exquisite, easy and simple to handle, flexible, easy left-hand seat.Solve the awkward difficult problem of outdoor study.
A kind of purposes of portable near infrared spectrum detecting system, described portable near infrared spectrum detecting system is above-mentioned portable near infrared spectrum detecting system, described portable near infrared spectrum detecting system is used for detecting soft substrate or solid sample, described soft substrate or solid sample and adds to sampling member.
A kind of soft substrate or solid sample near infrared spectrum detection method, use above-mentioned portable near infrared spectrum detecting system to detect, and described detection method comprises the following steps:
Step one: soft substrate or the foundation of solid sample chemometric model；
Step 2: soft substrate or the detection of solid sample: described sample is placed in sampling member, calibration module and detection module is chosen successively by client, the spectroscopic data of detection is exported to cloud database by described client, chemometric model comparison with detected sample is analyzed qualitative data and the quantitative data obtaining testing sample, described qualitative data and quantitative data and is sent to data disaply moudle.
Use technique scheme, including following beneficial effect: one of the present utility model portable near infrared spectrum detecting system, in the case of not expanding equipment volume and weight, be greatly improved accuracy of detection, solve the problem that model migrates difficulty.Can effectively react soft substrate or solid sample to the qualitative analysis of infrared light and quantitative data result, detection process only can complete in 5 seconds simultaneously.Quickly, conveniently, it is to avoid loaded down with trivial details time-consuming operation, substantial amounts of time and manpower, suitable large-scale popularization and use are saved.Simultaneously this utility model system detection wave-length coverage be 900-1700nm, global shape for erect rectangle, a size of 150 × 70 × 58mm, weight be less than 500g, standby time can reach 8 hours, it is simple to field operation detection use, small and exquisite flexibly, it is simple to carry.
Accompanying drawing explanation
Fig. 1 is this utility model sample pool structure schematic diagram；
Fig. 2 is this utility model embodiment one portable near infrared spectrum detecting system schematic cross-section；
Fig. 3 is this utility model embodiment two portable near infrared spectrum detecting system structural representation；
Fig. 4 is this utility model embodiment three portable near infrared spectrum detecting system structural representation；
Fig. 5 is the scatterplot of this utility model embodiment Fuji apple sample sugariness model chemistry measured value and model predication value；
Fig. 6 is the scattergram of this utility model embodiment Fuji apple sample sugariness model chemistry measured value and residual error.
In figure,
1, housing；11, lid；2, acquisition window；21, sample cell；211, sapphire sample contact face；212, fixing seat；3, detection light source；4, light-dividing device；5, detector；6, transducer；7, electric supply installation；71, on and off switch；8, micro-central controller；9, client；91, calibration module；92, detection module；93, data disaply moudle；10, cloud database.
Detailed description of the invention
Below by specific embodiment and combine accompanying drawing this utility model is described in further detail.
Embodiment one: as depicted in figs. 1 and 2, a kind of portable near infrared spectrum detection is, the acquisition window 2 that including housing 1, is arranged on housing, be sequentially arranged at housing in and the detection light source 3, light-dividing device 4 and the detector 5 that are located along the same line with described acquisition window, transducer 6 and electric supply installation 7 it is also equipped with in described housing, the outfan of described detector is connected with the input of described transducer, and described electric supply installation is connected with detection light source, detector and transducer respectively；Also include sample cell 21, described sample cell is arranged on described acquisition window, described sample cell includes sapphire sample contact face 211 and fixing seat 212, it is formed with chamber in described fixing seat and two ends are provided with opening, the one end open of described fixing seat is fixedly mounted on acquisition window, fixedly mounting described sapphire sample contact face on other end opening, described light-dividing device is linear variable filter.
A kind of purposes of portable near infrared spectrum detecting system, described portable near infrared spectrum detecting system be on portable near infrared spectrum detecting system, described portable near infrared spectrum detecting system is used for detecting soft substrate or solid sample, described soft substrate or solid sample and adds to sampling member.
Embodiment two: as shown in figures 1 and 3, a kind of portable near infrared spectrum detection is, the acquisition window 2 that including housing 1, is arranged on housing, be sequentially arranged at housing in and the detection light source 3, light-dividing device 4 and the detector 5 that are located along the same line with described acquisition window, transducer 6 and electric supply installation 7 it is also equipped with in described housing, the outfan of described detector is connected with the input of described transducer, and described electric supply installation is connected with detection light source, detector and transducer respectively；Also include sample cell 21, described sample cell is arranged on described acquisition window, described sample cell includes sapphire sample contact face 211 and fixing seat 212, it is formed with chamber in described fixing seat and two ends are provided with opening, the one end open of described fixing seat is fixedly mounted on acquisition window, fixedly mounting described sapphire sample contact face on other end opening, described light-dividing device is linear variable filter.
Being connected with lid 11 on described housing, described lid is located at outside described sample cell.
Described detector is 128 line element non-brake method indium Ga-As diode array detectors, and described transducer is A/D converter.
Described light source is double integrated vacuum tungsten lamps.
Described electric supply installation is rechargeable battery, and described housing is provided with charging plug.
Being provided with on and off switch 71 on described housing, described on and off switch is connected with described electric supply installation.
The spectral region of described linear variable filter is 900～1700nm.
Described portable near infrared spectrum detecting system also includes the client 9 that micro-central controller 8 is connected with described micro-central controller radio communication, described micro-central controller is arranged in housing, described micro-central controller is connected with described electric supply installation, detection light source, detector and transducer, spectroscopic data after described transducer is changed by described micro-central controller transmits to client, and the control signal receiving described client transmissions controls described detection light source, detector and the opening and closing of transducer.
Described client includes calibration module 91, detection module 92 and the data disaply moudle 93 chosen the most successively；
Client is made to send a control signal to micro-central controller by choosing calibration module, the calibration spectrum data of described micro-central controller receiving converter output, and described calibration spectrum data are exported to client, described data disaply moudle is used for showing calibration spectrum data；
Client is made to send a control signal to micro-central controller by choosing detection module, the detection spectroscopic data of described micro-central controller receiving converter output, and described detection spectroscopic data is exported to client, described data disaply moudle is used for showing detection spectroscopic data.
A kind of purposes of portable near infrared spectrum detecting system, described portable near infrared spectrum detecting system be on portable near infrared spectrum detecting system, described portable near infrared spectrum detecting system is used for detecting soft substrate or solid sample, described soft substrate or solid sample and adds to sampling member.
Embodiment three: as shown in Figure 1 and Figure 4, a kind of portable near infrared spectrum detection is, the acquisition window 2 that including housing 1, is arranged on housing, be sequentially arranged at housing in and the detection light source 3, light-dividing device 4 and the detector 5 that are located along the same line with described acquisition window, transducer 6 and electric supply installation 7 it is also equipped with in described housing, the outfan of described detector is connected with the input of described transducer, and described electric supply installation is connected with detection light source, detector and transducer respectively；Also include sample cell 21, described sample cell is arranged on described acquisition window, described sample cell includes sapphire sample contact face 211 and fixing seat 212, it is formed with chamber in described fixing seat and two ends are provided with opening, the one end open of described fixing seat is fixedly mounted on acquisition window, fixedly mounting described sapphire sample contact face on other end opening, described light-dividing device is linear variable filter.
Being connected with lid 11 on described housing, described lid is located at outside described sample cell.
Described detector is 128 line element non-brake method indium Ga-As diode array detectors, and described transducer is A/D converter.
Described light source is double integrated vacuum tungsten lamps.
Described electric supply installation is rechargeable battery, and described housing is provided with charging plug.
Being provided with on and off switch 71 on described housing, described on and off switch is connected with described electric supply installation.
The spectral region of described linear variable filter is 900～1700nm.
Described portable near infrared spectrum detecting system also includes the client 9 that micro-central controller 8 is connected with described micro-central controller radio communication, described micro-central controller is arranged in housing, described micro-central controller is connected with described electric supply installation, detection light source, detector and transducer, spectroscopic data after described transducer is changed by described micro-central controller transmits to client, and the control signal receiving described client transmissions controls described detection light source, detector and the opening and closing of transducer.
Described client includes calibration module 91, detection module 92 and the data disaply moudle 93 chosen the most successively；
Client is made to send a control signal to micro-central controller by choosing calibration module, the calibration spectrum data of described micro-central controller receiving converter output, and described calibration spectrum data are exported to client, described data disaply moudle is used for showing calibration spectrum data；
Client is made to send a control signal to micro-central controller by choosing detection module, the detection spectroscopic data of described micro-central controller receiving converter output, and described detection spectroscopic data is exported to client, described data disaply moudle is used for showing detection spectroscopic data.
Described portable near infrared spectrum detecting system also includes cloud database 10, described portable near infrared spectrum detecting system also includes cloud database, described cloud database communicates to connect with described client wireless, described cloud database internal memory contains the chemometric model of detected sample, the spectroscopic data received is exported to cloud database by described client, qualitative data and the quantitative data obtaining testing sample is analyzed in the chemometric model comparison of the described spectroscopic data received with detected sample by described cloud database, and described qualitative data and quantitative data are sent to client.
Further, described detection spectroscopic data is exported to cloud database by described detection module, qualitative data and the quantitative data obtaining testing sample is analyzed in the chemometric model comparison of the described detection spectroscopic data received with detected sample by described cloud database, and described qualitative data and quantitative data are sent to data disaply moudle, described data disaply moudle is used for showing qualitative data and quantitative data.
Described qualitative data includes place of production information and kind information, and described quantitative data includes soluble solid quantitative value and sugariness numerical value.But the qualitative data that system of the present utility model is detected and quantitative data are not limited to above-mentioned cited information.
A kind of purposes of portable near infrared spectrum detecting system, described portable near infrared spectrum detecting system be on portable near infrared spectrum detecting system, described portable near infrared spectrum detecting system is used for detecting soft substrate or solid sample, described soft substrate or solid sample and adds to sampling member.
The detection method of this utility model portable near infrared spectrum detecting system, comprises the following steps:
1, the chemometric model of detected sample is set up: use MATHLAB software to carry out algorithm and the independent research of model and programming, meet enterprise and industry standard, optional preprocessing procedures and multiple deterministic algorithm, such as setting up chemometric model for Fructus Mali pumilae sample, modelling effect is as shown in Fig. 5～6.BRIX-soluble solid for Fuji apple has carried out quantitative model foundation, and model accuracy has reached 92.22%.
2, start hardware power switch, started by micro-central controller program and equipment is powered and started running, open the APP program of client simultaneously, carry out equipment wireless connections by WIFI traffic model.
3, sample cell based on soft substrate or the solid sample placement of independent research is arranged on described acquisition window.APP client selects to need the sample (such as Fructus Mali pumilae) of detection, clicks on " Fructus Mali pumilae detection " APP and order is mail to cloud database, and cloud database calls Fructus Mali pumilae chemometric model model simultaneously.
4, light intensity and the time of integration need to be determined due near infrared technology, therefore APP client clicks on calibration.Equipment light source starts, and puts into calibration block in sample cell, and light source is launched stable near infrared light signal and arrived calibration block and diffuse-reflectance occurs, and optical signal enters in linear variable filter.Optical signal generation dispersion in linear variable filter, polychromatic light diverges to monochromatic light, after dispersion light beam enter detector 128 line element non-brake method indium gallium arsenic (inGaAs) diode array, by the A/D converters of 16, opto-electronic conversion obtained the signal of telecommunication and generate image in a detector, obtaining maximum absorbance.And APP client occurs that next step is pointed out.
5, taking down calibration block, click on APP functional keys, now light source is closed, and is acquired Natural light intensity, near infrared light signal collection Natural light intensity, and optical signal enters in beam splitting system (linear variable filter).Optical signal generation dispersion in beam splitting system, polychromatic light diverges to monochromatic light, light beam after dispersion enters detector 128 line element non-brake method indium gallium arsenic (inGaAs) diode array, by the A/D converters of 16, opto-electronic conversion obtained the signal of telecommunication and generate image in a detector, obtaining nature absorptivity.And APP client occurs that next step is pointed out.
6, now can carry out soft substrate or the Fast nondestructive evaluation of solid sample (such as Fructus Mali pumilae), put into by sample in sample cell and sample cell is put into acquisition window, APP client clicks on " detection ".Light source starts, and light source is launched stable near infrared light signal and arrived testing sample and diffuse-reflectance occurs, and optical signal enters in beam splitting system (linear variable filter).Optical signal generation dispersion in beam splitting system, polychromatic light diverges to monochromatic light, light beam after dispersion enters detector 128 line element non-brake method indium gallium arsenic (inGaAs) diode array, by the A/D converters of 16, opto-electronic conversion obtained the signal of telecommunication and generate image in a detector, obtaining the spectroscopic data of testing sample.Spectroscopic data is uploaded to cloud database (such as Fructus Mali pumilae chemometric model) by APP client, by comparison, obtain qualitative data (such as the place of production and kind) and/or the quantitative data (such as BRIX-soluble solid) of testing sample.Detect process through system optimization and Frame Design to complete in 5 seconds.The continuation detection button of APP client is clicked on as detection need to be continued.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (7)
1. a portable near infrared spectrum detecting system, the acquisition window (2) that including housing (1), is arranged on housing, be sequentially arranged at housing in and the detection light source (3), light-dividing device (4) and the detector (5) that are located along the same line with described acquisition window, transducer (6) and electric supply installation (7) it is also equipped with in described housing, the outfan of described detector is connected with the input of described transducer, and described electric supply installation is connected with detection light source, detector and transducer respectively；It is characterized in that, also include sample cell (21), described sample cell includes sapphire sample contact face (211) and fixing seat (212), it is formed with chamber in described fixing seat and two ends are provided with opening, the one end open of described fixing seat is fixedly mounted on acquisition window, fixedly mounting described sapphire sample contact face on other end opening, described light-dividing device is linear variable filter.
One the most according to claim 1 portable near infrared spectrum detecting system, it is characterised in that be connected with lid (11) on described housing, described lid is located at outside described sample cell.
One the most according to claim 1 portable near infrared spectrum detecting system, it is characterised in that described detector is 128 line element non-brake method indium Ga-As diode array detectors, and described transducer is A/D converter；Described light source is double integrated vacuum tungsten lamps.
One the most according to claim 1 portable near infrared spectrum detecting system, it is characterised in that described electric supply installation is rechargeable battery, and described housing is provided with charging plug.
One the most according to claim 1 portable near infrared spectrum detecting system, it is characterised in that be provided with on and off switch (71) on described housing, described on and off switch is connected with described electric supply installation.
One the most according to claim 1 portable near infrared spectrum detecting system, it is characterised in that the spectral region of described linear variable filter is 900～1700nm.
7. according to the one portable near infrared spectrum detecting system described in any one of claim 1～6, it is characterized in that, described portable near infrared spectrum detecting system also includes micro-central controller (8), the client (9) being connected with described micro-central controller radio communication, described micro-central controller is arranged in housing, described micro-central controller and described electric supply installation, detection light source, detector and transducer connect, spectroscopic data after described transducer is changed by described micro-central controller transmits to client, and the control signal receiving described client transmissions controls described detection light source, detector and the opening and closing of transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620034575.XU CN205506679U (en) | 2016-01-14 | 2016-01-14 | Portable near infrared spectroscopy detecting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527246A (en) * | 2016-01-14 | 2016-04-27 | 昆明睿意铂科技股份有限公司 | Portable near infrared spectrum detection system |
| CN107202761A (en) * | 2017-06-09 | 2017-09-26 | 甘肃萃英大农科技有限公司 | The portable detection equipment and detection method of a kind of quick detection fruit internal quality |
| CN109738379A (en) * | 2019-01-22 | 2019-05-10 | 四川长虹电器股份有限公司 | A kind of miniature molecular spectrum identification device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527246A (en) * | 2016-01-14 | 2016-04-27 | 昆明睿意铂科技股份有限公司 | Portable near infrared spectrum detection system |
| CN107202761A (en) * | 2017-06-09 | 2017-09-26 | 甘肃萃英大农科技有限公司 | The portable detection equipment and detection method of a kind of quick detection fruit internal quality |
| CN109738379A (en) * | 2019-01-22 | 2019-05-10 | 四川长虹电器股份有限公司 | A kind of miniature molecular spectrum identification device |
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