CN103487396B - Near infrared sugar degree the cannot-harm-detection device that a kind of illumination parameter is adjustable - Google Patents
Near infrared sugar degree the cannot-harm-detection device that a kind of illumination parameter is adjustable Download PDFInfo
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Abstract
The near infrared sugar degree the cannot-harm-detection device that illumination parameter is adjustable, is made up of spectra collection module and data processing and Operating Interface Module two parts.Spectra collection module mainly realizes the adjustment of light source irradiation parameter and the acquisition function of sample spectra information; Data processing and Operating Interface Module mainly realize the reading of spectral information, deposit, show, change, and optimum configurations, the prediction of fruit sample pol and Presentation Function.The present invention can pass through the irradiating angle regulating light source, or changes the position of light source in lamp support chute, reaches the object detecting different fruit position, different fruitlet and variety classes fruit greatly.By changing the position of lamp support in V-shaped rest chute, the size that light source impinges upon intensity on fruit can be changed, thus the fruit of different peel thickness and different size can be detected.
Description
Technical field
The invention discloses near infrared sugar degree the cannot-harm-detection device that a kind of illumination parameter is adjustable, belong to application near infrared spectrum, agricultural product are carried out to the technical field of Non-Destructive Testing.
Background technology
Along with improving constantly of living standard, consumer, when buying fruit, not only pays close attention to the external sorts such as size, color and profile, and it is also proposed higher requirement to inside qualities such as mouthfeel, pol and acidity.At present, for the detection of fruit internal quality, mostly adopt the method for artificial sense evaluation and conventional chemical analysis.Artificial sense rating method, has that subjectivity is strong, the not first-class shortcoming of evaluation criterion; And for conventional chemical analysis method, although it has the advantages such as the high and accuracy of accuracy in detection is strong, greatly, detection time is long, and need destroy sample, and these are not all suitable for the Fast nondestructive evaluation of fruit internal quality for its testing amount.
Near-infrared spectrum technique has that analysis speed is fast, non-destructive, sample without the need to pre-service, can to realize simultaneous determination of multiponents, and low cost and simple operation and other advantages.At present, utilize near-infrared spectrum technique to carry out Non-Destructive Testing to the correlation merit of agricultural product and have more report, as: United States Patent (USP) NO.6754600B2 discloses a kind of Portable near infrared veterinary antibiotics inside quality the cannot-harm-detection device with preheating controllable device, to detect the pol of fruit and degree of ripeness; The Chinese patent of publication No. CN101308086A discloses a kind of fruit quality online test method based on near-infrared spectrum technique and device; The Chinese patent of publication No. CN101799401A discloses a kind of handheld near-infrared probe for fruit internal quality Non-Destructive Testing and detection method; Publication No. CN103048277A discloses a kind of system and method for near infrared spectrum Non-Destructive Testing fruit internal quality.Above-mentioned near-infrared spectrometer device or device be mostly the irradiating angle of light source and irradiation distance fixing, when sometimes will detect other detected objects, angle and the irradiation distance of light source irradiation need be reset.
Summary of the invention
Order of the present invention is for above-mentioned the deficiencies in the prior art, a kind of near infrared sugar degree the cannot-harm-detection device is provided, especially a kind of light source radiating angle and the adjustable near infrared sugar degree the cannot-harm-detection device of irradiation distance, to realize according to different detected objects, adjust irradiating angle and the irradiation distance of light source easily.
The technical scheme that the present invention proposes is:
The present invention proposes near infrared sugar degree the cannot-harm-detection device that a kind of illumination parameter is adjustable, it is characterized in that, described device comprises spectra collection module and data processing and Operating Interface Module two parts.Wherein:
Spectra collection module: comprise lamp support, fruit tray, light source and V-shaped rest, optical fiber, condenser lens, focusing lens holder, fan and blower tray, this device light source adopts two Halogen lamp LED (specifications: 12V, 100W) both sides asymmetrical arrangement, the Lamp cup two ends of Halogen lamp LED, 180 ° of angular bits of being separated by have two bolts hole, and Halogen lamp LED is bolted on the chute of lamp support.Lamp support is bolted on the chute of V-shaped rest, and V-shaped rest is bolted on the tank wall of device, and the angle of bend of V-shaped rest is 45 degree.Fruit to be measured is placed on the fruit tray of quality of rubber materials, so both can play the effect of fixing fruit, can improve sealing property again, and the diffraction light reducing to produce along fruit surface is on the impact of testing result.Optical fiber front end installs condenser lens additional, and to strengthen the spectral information through fruit sample collected, condenser lens is threaded connection and is fixed on focusing lens holder.Install a desk fan respectively additional before light source, and by bolt-connection fan attachment support, fan dispels the heat to light source.
Data processing and Operating Interface Module: comprise microprocessor, microprocessor support, micro fiber spectrometer, USB line, touch display screen, condenser lens by Fiber connection on the SMA905 interface of micro fiber spectrometer; Micro fiber spectrometer is received on microprocessor by USB line.The effect of micro fiber spectrometer is the spectral information of the fruit sample passed over by optical fiber, changes into numerical information, and passes to microprocessor by USB line and carry out data processing.Microprocessor carries out communication by com port and RS232 line and touch display screen; 12V constant voltage dc source supplies microprocessor after voltage transitions being become 5V by DC/DC transducer; 12V constant voltage dc source is powered to light source and fan by power lead.The effect of touch display screen operates the software of instrument, and show the spectral information of sample and testing result.
The software systems Java programming language that this device adopts is write, and comprises spectra collection and spectral analysis two modules.Its Main Function is that the spectral information about fruit sample pol passed over by micro fiber spectrometer processes, and flows to touch display screen and show.Wherein, spectra collection module is arranged except (comprise and arranging integral time and average setting), data acquisition, data processing except having device parameter, also has the basic functions such as data storage and data-printing.Spectral analysis module is mainly used for carrying out analyzing and processing to the spectroscopic data collected, and touch display screen demonstrates original spectrum or the transmitted spectrum of sample, and the change of spectrum can be shown in real time.
The invention provides near infrared sugar degree the cannot-harm-detection device that a kind of illumination parameter is adjustable, its course of work is as follows:
1, according to different types of fruit, illumination parameter (light source radiating angle, light source irradiation distance) is set;
2, device for opening switch, treats that software systems enter automatically and detects interface, and make light source preheating 20 minutes;
3, reference, the dark current of determinator, reference is teflon blank;
4, be placed on fruit tray by fruit to be measured, and fruit and fruit tray are adjacent to, after the illumination that light source sends is mapped to fruit, transmitted light imports micro fiber spectrometer into by optical fiber after being focused on by condenser lens;
5, spectra collection and analysis software control the transmitted spectrum that micro fiber spectrometer collects fruit, and calculate the pol of fruit;
6, by result display on a display screen.
The beneficial effect that the present invention has is: under this structural design, can by regulating the irradiating angle θ of light source, or change the position of light source in lamp support chute, reach the object detecting different fruit position, different fruitlet and variety classes fruit greatly.By changing the position of lamp support in V-shaped rest chute, the size that light source impinges upon intensity on fruit can be changed, thus the fruit of different peel thickness and different size can be detected; Detected fruit is placed on above the fruit tray of quality of rubber materials, so both can play the effect of fixing fruit, can improve sealing property again, and the diffraction light reducing to produce along fruit surface is on the impact of testing result; Optical fiber front end has installed condenser lens additional, enhances the spectral information through fruit sample collected; This device adopts the form of sealing, like this when collecting fruit the spectrum of sample, just avoids the impact of external stray light; Adopt 12V constant voltage dc source to be light source power supply, be conducive to the stability of light source luminescent; Install fan additional respectively before light source, be conducive to the heat radiation of light source, and the stability of light source luminescent.Accuracy of detection of the present invention is higher, and speed is fast, is applicable to Fast nondestructive evaluation and the classification of sugar degree.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention;
Fig. 2 is structural front view of the present invention;
Fig. 3 is structure left view of the present invention;
Fig. 4 is structure vertical view of the present invention;
Fig. 5 is the three-view diagram of lamp support of the present invention;
Fig. 6 is V-shaped rest three-view diagram of the present invention;
Fig. 7 is sugar degree testing process process flow diagram of the present invention;
Fig. 8 is the graph of a relation of apple sugar content predicted value of the present invention and actual value.
Figure labelled notation in accompanying drawing:
(1) lamp support; (2) fruit tray; (3) light source; (4) chute; (5) louvre; (6) V-shaped rest; (7) chute; (8) corner brace; (9) microprocessor; (10) microprocessor support; (11) DC/DC transducer; (12) USB line; (13) optical fiber; (14) micro fiber spectrometer; (15) switch; (16) condenser lens; (17) focusing lens holder; (18) base plate; (19) 12V constant voltage dc source; (20) power supply string holes; (21) hinge; (22) fan; (23) fan fixing rack; (24) handle; (25) touch display screen (26) lid.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
The structure of the embodiment of the present invention is as shown in Fig. 1 ~ Fig. 6, and near infrared sugar degree the cannot-harm-detection device that a kind of illumination parameter is adjustable, comprises spectra collection module and data processing and Operating Interface Module two parts.
The present invention is made up of spectra collection module and data processing and Operating Interface Module two parts, spectra collection model calling data processing and Operating Interface Module, and described spectra collection module realizes light source irradiation parameter and regulates and the function of collected specimens spectral information; Data processing and Operating Interface Module realize the reading of spectral information, deposit, show, change, and optimum configurations, the prediction of fruit sample pol and Presentation Function, and optimum configurations comprises and arranging integral time and average setting.
Described spectra collection module comprises lamp support 1, fruit tray 2, light source 3, V-shaped rest 6, optical fiber 13, condenser lens 16, focusing lens holder 17, fan 22 and blower tray 23, described light source 3 adopts two Halogen lamp LED both sides asymmetrical arrangement, the Lamp cup two ends of Halogen lamp LED, 180 ° of angular bits of being separated by have two bolts hole, on the chute that Halogen lamp LED is bolted on lamp support 14, lamp support 1 is bolted on the chute 7 of V-shaped rest 6, and V-shaped rest 6 is bolted on the tank wall of device, the angle of bend of V-shaped rest is 45 degree, fruit to be measured is placed on the fruit tray 2 of quality of rubber materials, optical fiber front end installs condenser lens 16 additional, condenser lens 16 is threaded connection and is fixed on focusing lens holder 17, light source 3 installs a desk fan 22 additional above respectively, and by bolt-connection fan attachment support 23, fan 22 pairs of light sources 3 dispel the heat.
Described data processing and Operating Interface Module comprise microprocessor 9, microprocessor support 10, micro fiber spectrometer 14, USB line 12, touch display screen 25, and condenser lens 16 is by optical fiber 13) be connected on the SMA905 interface of micro fiber spectrometer 14; Micro fiber spectrometer 14 is received on microprocessor 9 by USB line 12, the effect of micro fiber spectrometer 14 is the spectral informations of the fruit sample passed over by optical fiber 13, change into numerical information, and pass to microprocessor 9 carry out data processing by USB line (12), microprocessor 9 carries out communication by com port and RS232 line and touch display screen 25; 12V constant voltage dc source 19 supplies microprocessor 9 after voltage transitions being become 5V by DC/DC transducer; 12V constant voltage dc source 19 is powered to light source 3 and fan 22 by power lead.
Illumination parameter control method is as follows: by regulating the irradiating angle of light source, or change the position of light source 3 in lamp support 1 upper hopper chute 4, reach the object detecting different fruit position, different fruitlet and variety classes fruit greatly, by changing the position of lamp support 1 in V-shaped rest 6 upper hopper chute 7, the size that light source impinges upon intensity on fruit can be changed, thus the fruit of different peel thickness and different size can be detected.
The specification of Halogen lamp LED is 12V, 100W.
Software systems adopt Java programming language to write, and comprise spectra collection and spectral analysis two modules.Its Main Function is processed by the spectral information about fruit sample pol that micro fiber spectrometer (14) passes over, and flow to touch display screen (25) and show.Wherein, spectra collection module, except having optimum configurations (comprise and arranging integral time and average setting), data acquisition, data processing, also has the basic functions such as data storage and data-printing.Spectral analysis module is mainly used for carrying out analyzing and processing to the spectroscopic data collected, and touch display screen demonstrates original spectrum or the transmitted spectrum of sample, and the change of spectrum can be shown in real time.
The sugar degree testing process flow process of the embodiment of the present invention as shown in Figure 7, arranges illumination parameter (lighting angle and luminous range); Opening device, treats that software systems enter automatically and detects interface; Load forecast model, and integral time and average are set; The reference of determinator and dark current; Fruit sample to be measured was placed on pallet 2, and fruit sample and fruit tray 12 are adjacent to; The illumination that light source 3 sends is mapped on fruit, and transmitted light line focus lens 16 pass to micro fiber spectrometer 14 by optical fiber 13 after assembling; Micro fiber spectrometer 14 converts the transmitted spectrum information of fruit sample to numerical information, and passes to microprocessor 9; Microprocessor 9 calculates glucose prediction value according to the model loaded, and predicted value result is presented on touch display screen 25.
Below to detect the course of work that apple sugar content introduces the embodiment of the present invention:
according to different types of fruit, illumination parameter (light source radiating angle, light source irradiation distance) is set;
device for opening switch, treats that software systems enter automatically and detects interface, and make light source preheating 20 minutes;
the reference of determinator, dark current, reference is teflon blank;
fruit to be measured is placed on fruit tray 2, and fruit and fruit tray 2 are adjacent to, after the illumination that light source 3 sends is mapped to fruit, after transmitted light is collected by condenser lens 12, import in micro fiber spectrometer 15 by optical fiber 11;
spectra collection and analysis software control the transmitted spectrum that micro fiber spectrometer gathers apple sample, substitute into model
after, calculate the pol that apple goes out; In model, Y represents the pol of apple to be measured, λ
ifor wavelength, T (λ
i) be wavelength X
ithe transmissivity of place's spectrum.The wavelength band of spectrum is 560 ~ 940nm, regression coefficient a
0~ a
n, intercept b is by after different apple specimen test, utilizes partial least square method to try to achieve.
utilize regression coefficient a
0~ a
n, intercept b builds the forecast model of apple sugar content
, by gathering visible/near infrared wavelength
reflectivity T (the λ at place
i) spectral value, substitute into model, automatically calculate glucose prediction value;
predicted value result is presented on display screen 6;
to different types of sugar degree, ③ – method 4. can be utilized to carry out sample experiments, construct the glucose prediction model of variety classes fruit, by the T (λ detected
i) signal, calculate the pol value demonstrated in variety classes fruit.
The embodiment of the present invention carries out the effect of modeling and prediction as shown in Figure 8 to apple sample.Now illumination parameter facilities is: the irradiating angle θ of light source 3 is 45 °, and the set bolt of light source 3 is positioned at the centre of chute 4, and the set bolt of lamp support 1 is positioned at the top of chute 7.For improving the efficiency of data processing and the validity of selected spectral band in model process of establishing, to there is obvious noise and not removing containing the wave band of apple sample pol characteristic spectrum.After removal, employing spectral range is that the wave band of 560nm ~ 940nm carries out data processing and modeling.Use single order level and smooth, carry out noise reduction process in conjunction with the original absorbance spectrum of second order differentiate preprocess method to selected wave band, and use partial least square method (PLS) to set up calibration model.By calibration model gained to model and controling parameters (pretreatment parameter and spectrum range Selection parameter) be loaded in instrument, and to remaining 60 checking collection samples predict, modeling effect and prediction effect are respectively as schemed shown in a and b.Wherein, the related coefficient of calibration set and forecast set is respectively R
c=0.82, R
p=0.79; The root-mean-square error of calibration set and forecast set is respectively RMSEC=0.78, RMSEP=0.97.Predicting the outcome of visible instrument is ideal, illustrates that this instrument has stronger predictive ability to apple sugar content.
Claims (3)
1. near infrared sugar degree the cannot-harm-detection device that an illumination parameter is adjustable, be made up of spectra collection module and data processing and Operating Interface Module two parts, it is characterized in that, spectra collection model calling data processing and Operating Interface Module, described spectra collection module realizes the function of the adjustment of light source irradiation parameter and collected specimens spectral information, data processing and Operating Interface Module realize the reading of spectral information, deposit, show, change, and optimum configurations, the prediction of fruit sample pol and Presentation Function, and optimum configurations comprises and arranging integral time and average setting, described spectra collection module comprises lamp support (1), fruit tray (2), light source (3), V-shaped rest (6), optical fiber (13), condenser lens (16), focusing lens holder (17), fan (22) and fan fixing rack (23), described light source (3) adopts two Halogen lamp LED both sides asymmetrical arrangement, the Lamp cup two ends of Halogen lamp LED, 180 ° of angular bits of being separated by have two bolts hole, Halogen lamp LED is bolted on the chute (4) of lamp support (1), lamp support (1) is bolted on the chute (7) of V-shaped rest (6), by changing lamp support (1) position in V-shaped rest (6) upper hopper chute (7), change the size that light source impinges upon intensity on fruit, thus the fruit of different peel thickness and different size can be detected, and V-shaped rest (6) is bolted on the tank wall of device, the angle of bend of V-shaped rest is 45 degree, fruit to be measured is placed on the fruit tray (2) of quality of rubber materials, optical fiber front end installs condenser lens (16) additional, condenser lens (16) is threaded connection and is fixed on focusing lens holder (17), light source (3) installs a desk fan (22) additional above respectively, and be fixed on fan fixing rack (23) by bolt-connection, fan (22) dispels the heat to light source (3), described data processing and Operating Interface Module comprise microprocessor (9), microprocessor support (10), micro fiber spectrometer (14), USB line (12), touch display screen (25), and condenser lens (16) is connected on the SMA905 interface of micro fiber spectrometer (14) by optical fiber (13), micro fiber spectrometer (14) is received on microprocessor (9) by USB line (12), the effect of micro fiber spectrometer (14) is the spectral information of the fruit sample passed over by optical fiber (13), change into numerical information, and pass to microprocessor (9) carry out data processing by USB line (12), microprocessor (9) carries out communication by com port and RS232 line and touch display screen (25), 12V constant voltage dc source (19) supplies microprocessor (9) after voltage transitions being become 5V by DC/DC transducer, 12V constant voltage dc source (19) is powered to light source (3) and fan (22) by power lead.
2. near infrared sugar degree the cannot-harm-detection device that a kind of illumination parameter according to claim 1 is adjustable, it is characterized in that, by changing light source (3) position in lamp support (1) upper hopper chute (4), reach the object detecting different fruit position, different fruitlet and variety classes fruit greatly.
3. near infrared sugar degree the cannot-harm-detection device that a kind of illumination parameter according to claim 1 is adjustable, is characterized in that, the specification of Halogen lamp LED is 12V, 100W.
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| CN110320175A (en) * | 2019-07-04 | 2019-10-11 | 中南林业科技大学 | A kind of near-infrared spectrum detection device and control method |
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