CN103487396A - Near-infrared fruit sugar degree nondestructive detecting device with adjustable illumination parameters - Google Patents
Near-infrared fruit sugar degree nondestructive detecting device with adjustable illumination parameters Download PDFInfo
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Abstract
A near-infrared fruit sugar degree nondestructive detecting device with adjustable illumination parameters comprises two parts, namely a spectrum collecting module and a data processing and operating interface module, wherein the spectrum collecting module mainly realizes the adjustment of light source irradiation parameters and the function of collecting sample spectral information; the data processing and operating interface module mainly realizes the reading, saving, displaying and transforming of the spectral information, the parameter setting, the prediction of fruit sample sugar degree, and the displaying function. According to the invention, the irradiation angle of the light source can be adjusted, or the position of the light source in a sliding chute of a lamp bracket can be changed, so as to achieve the purposes that different parts of fruits, fruits with different sizes and different kinds of fruits are detected; the position of the lamp bracket in the V-shaped bracket sliding chute can be changed to change the intensity of the light source irradiating on the fruits, so that fruits with different peel thicknesses and different sizes can be detected.
Description
Technical field
The invention discloses the adjustable near infrared fruit pol the cannot-harm-detection device of a kind of illumination parameter, belong to the 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, the consumer, when buying fruit, not only pays close attention to the external sorts such as size, color and profile, and the inside qualities such as mouthfeel, pol and acidity is also had higher requirement.At present, for the detection of fruit internal quality, the method that mostly adopts artificial sense evaluation and conventional chemical to analyze.The artificial sense rating method, have that subjectivity is strong, the not first-class shortcoming of evaluation criterion; And, for the conventional chemical analytical approach, although it has the advantages such as the high and accuracy of accuracy in detection is strong, its testing amount is large, detection time is long, and need be destroyed sample, and these all are not suitable for quick nondestructives detection of fruit internal quality.
Near-infrared spectrum technique has that analysis speed is fast, non-destructive, sample be without pre-service, can realize simultaneous determination of multiponents, and low cost and simple operation and other advantages.At present, utilize near-infrared spectrum technique to carry out the existing more report of Non-Destructive Testing to the relevant quality of agricultural product, as: United States Patent (USP) NO. 6754600 B2 disclose a kind of vegetables of the Portable near infrared with the preheating controllable device, fruit internal quality the cannot-harm-detection device, with the pol to fruit and degree of ripeness, are detected; The Chinese patent of publication No. CN 101308086 A discloses a kind of fruit quality online test method and device based on near-infrared spectrum technique; The Chinese patent of publication No. CN 101799401 A discloses a kind of handheld near-infrared probe for the fruit internal quality Non-Destructive Testing and detection method; Publication No. CN 103048277 A disclose a kind of system and method for near infrared spectrum Non-Destructive Testing fruit internal quality.Above-mentioned near-infrared spectrometer device or device mostly are what the irradiating angle of light source and irradiation distance were fixed, in the time of sometimes will be detected other detected objects, need reset angle and the irradiation distance of light source irradiation.
Summary of the invention
Order of the present invention is for above-mentioned the deficiencies in the prior art, a kind of near infrared fruit pol the cannot-harm-detection device is provided, especially near infrared fruit pol the cannot-harm-detection device that a kind of light source radiating angle and irradiation distance are adjustable, to realize according to different detected objects, adjust easily irradiating angle and the irradiation distance of light source.
The technical scheme that the present invention proposes is:
The present invention proposes the adjustable near infrared fruit pol the cannot-harm-detection device of a kind of illumination parameter, it is characterized in that, described device comprises spectra collection module and data processing and two parts of Operating Interface Module.Wherein:
Spectra collection module: comprise lamp support, fruit tray, light source and V-shaped rest, optical fiber, condenser lens, condenser lens support, fan and blower tray, this device light source adopts two Halogen lamp LED (specifications: 12V, 100W) both sides are arranged symmetrically with mode, the Lamp cup two ends of Halogen lamp LED, the 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 fixedly effect of fruit, can improve sealing property again, reduces the impact on testing result of the diffraction light that produces along fruit surface.The optical fiber front end installs condenser lens additional, the spectral information that sees through the fruit sample of collecting with enhancing, and condenser lens is threaded connection and is fixed on the condenser lens support.The light source front installs respectively a desk fan additional, and, by bolt-connection fan attachment support, fan is dispelled the heat to light source.
Data are processed and Operating Interface Module: comprise microprocessor, microprocessor support, micro fiber spectrometer, USB line, touch display screen, condenser lens is connected on the SMA905 interface of micro fiber spectrometer by optical fiber; Micro fiber spectrometer is received on microprocessor by the USB line.The effect of micro fiber spectrometer is the spectral information of fruit sample that optical fiber is passed over, changes into numerical information, and passes to microprocessor by the USB line and carry out the data processing.Microprocessor carries out communication by com port and RS232 line and touch display screen; The 12V constant voltage dc source is supplied with microprocessor after by the DC/DC transducer, voltage transitions being become to 5V; The 12V constant voltage dc source is powered to light source and fan by power lead.The effect of touch display screen is that the software to instrument is operated, and spectral information and the testing result of sample shown.
The software systems that this device adopts are write with the Java programming language, comprise two modules of spectra collection and spectral analysis.Its Main Function is that the spectral information about fruit sample pol that micro fiber spectrometer is passed over is processed, and flows to touch display screen and shown.Wherein, the spectra collection module, except having device parameter setting (comprising that arrange and the average setting integral time), data acquisition, data processing, also has the basic functions such as data storage and data-printing.The spectroscopic data that spectral analysis module is mainly used for collecting carries out analyzing and processing, demonstrates original spectrum or the transmitted spectrum of sample on touch display screen, and the variation of spectrum can be shown in real time.
The invention provides the adjustable near infrared fruit pol the cannot-harm-detection device of a kind of illumination parameter, 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, treat that software systems enter the detection interface automatically, and make the light source preheating 20 minutes;
3, the reference of determinator, dark current, reference is the teflon blank;
4, fruit to be measured is placed on fruit tray, and fruit and fruit tray are adjacent to, after the illumination that light source sends is mapped to fruit, transmitted light enters miniature fiber spectrometer by optical fiber transmission after being focused on by condenser lens;
5, spectra collection and analysis software are controlled the transmitted spectrum that micro fiber spectrometer collects fruit, and calculate the pol of fruit;
6, result is presented on display screen.
The beneficial effect that the present invention has is: under this structural design, can be by regulating the irradiating angle θ of light source, or change the position of light source in the lamp support chute, reach the purpose that detects different fruit position, different large fruitlet and variety classes fruit.By changing the position of lamp support in the V-shaped rest chute, can change the size that light source impinges upon intensity on fruit, thereby can detect the fruit of different peel thicknesses and different sizes; Detected fruit is placed on above the fruit tray of quality of rubber materials, so both can play the fixedly effect of fruit, can improve sealing property again, reduces the impact on testing result of the diffraction light that produces along fruit surface; The optical fiber front end has installed condenser lens additional, has strengthened the spectral information that sees through the fruit sample of collecting; This device adopts the form of sealing, when collecting fruit the spectrum of sample, has just avoided the impact of external stray light like this; Adopting the 12V constant voltage dc source is light source power supply, is conducive to the stability of light source luminescent; The light source front installs respectively fan additional, is 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, and the quick nondestructive that is applicable to the fruit pol detects and classification.
The 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 fruit pol 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) condenser lens support; (18) base plate; (19) 12V constant voltage dc source; (20) power lead hole; (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 fruit pol the cannot-harm-detection device that a kind of illumination parameter is adjustable, comprise spectra collection module and data processing and two parts of Operating Interface Module.
The present invention is processed by spectra collection module and data and two parts of Operating Interface Module form, and spectra collection module connection data is processed and Operating Interface Module, and described spectra collection module realizes that the light source irradiation parameter is regulated and the function of collected specimens spectral information; Data are processed and Operating Interface Module is realized reading, deposit, show, change of spectral information, and prediction and the Presentation Function of parameter setting, fruit sample pol, and the parameter setting comprises setting 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, condenser lens support 17, fan 22 and blower tray 23, described light source 3 adopts two Halogen lamp LED both sides to be arranged symmetrically with mode, the Lamp cup two ends of Halogen lamp LED, the 180 ° of angular bits of being separated by have two bolts hole, Halogen lamp LED is bolted on the chute of 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, the optical fiber front end installs condenser lens 16 additional, condenser lens 16 is threaded connection and is fixed on condenser lens support 17, light source 3 fronts install respectively a desk fan 22 additional, and by bolt-connection fan attachment support 23, 22 pairs of light sources 3 of fan are dispelled the heat.
Described data are processed and Operating Interface Module comprises 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 spectral informations of fruit sample that optical fiber 13 is passed over, change into numerical information, and pass to microprocessor 9 by USB line (12) and carry out the data processing, microprocessor 9 carries out communication by com port and RS232 line and touch display screen 25; 12V constant voltage dc source 19 is supplied with microprocessor 9 after by the DC/DC transducer, voltage transitions being become to 5V; 12V constant voltage dc source 19 is powered to light source 3 and fan 22 by power lead.
The 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 purpose that detects different fruit position, different large fruitlet and variety classes fruit, by changing the position of lamp support 1 in V-shaped rest 6 upper hopper chutes 7, the size that light source impinges upon intensity on fruit can be changed, thereby the fruit of different peel thicknesses and different sizes can be detected.
The specification of Halogen lamp LED is 12V, 100W.
Software systems adopt the Java programming language to write, and comprise two modules of spectra collection and spectral analysis.Its Main Function is that the spectral information about fruit sample pol that micro fiber spectrometer (14) is passed over is processed, and flows to touch display screen (25) and shown.Wherein, the spectra collection module, except having parameter setting (comprising that arrange and the average setting integral time), data acquisition, data processing, also has the basic functions such as data storage and data-printing.The spectroscopic data that spectral analysis module is mainly used for collecting carries out analyzing and processing, demonstrates original spectrum or the transmitted spectrum of sample on touch display screen, and the variation of spectrum can be shown in real time.
The fruit pol 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, treat that software systems enter the detection interface automatically; 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 are passed 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 the glucose prediction value according to the model loaded, and the predicted value result is presented on touch display screen 25.
Below take and detect apple sugar content and introduce the course of work of the embodiment of the present invention as example:
the predicted value result is presented on display screen 6;
The effect that the embodiment of the present invention is carried out modeling and prediction to the apple sample as shown in Figure 8.Now the 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 the efficiency of data processing in raising model process of establishing and the validity of selected spectral band, to thering is obvious noise and not removed containing the wave band of apple sample pol characteristic spectrum.After removal, adopt the wave band that spectral range is 560nm ~ 940nm to carry out data processing and modeling.Use single order level and smooth, in conjunction with second order differentiate preprocess method, the original absorption spectrum of selected wave band is carried out to noise reduction process, and use partial least square method (PLS) to set up calibration model.The resulting model of calibration model and control parameter (pretreatment parameter and spectrum range are selected parameter) are loaded in instrument, and remaining 60 checking collection samples are predicted, modeling effect and prediction effect are respectively as shown in figure 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 comparatively desirable, illustrates that this instrument has stronger predictive ability to apple sugar content.
Claims (5)
1. near infrared fruit pol the cannot-harm-detection device that illumination parameter is adjustable, by spectra collection module and data, processed and two parts of Operating Interface Module form, it is characterized in that, spectra collection module connection data is processed and Operating Interface Module, and described spectra collection module realizes that the light source irradiation parameter is regulated and the function of collected specimens spectral information; Data are processed and Operating Interface Module is realized reading, deposit, show, change of spectral information, and prediction and the Presentation Function of parameter setting, fruit sample pol, and the parameter setting comprises setting integral time and average setting.
2. adjustable near infrared fruit pol the cannot-harm-detection device of a kind of illumination parameter according to claim 1, it is characterized in that described spectra collection module comprises lamp support (1), fruit tray (2), light source (3), V-shaped rest (6), optical fiber (13), condenser lens (16), condenser lens support (17), fan (22) and blower tray (23), described light source (3) adopts two Halogen lamp LED both sides to be arranged symmetrically with mode, the Lamp cup two ends of Halogen lamp LED, the 180 ° of angular bits of being separated by have two bolts hole, Halogen lamp LED is bolted on the chute of lamp support (1) (4), 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, the optical fiber front end installs condenser lens (16) additional, condenser lens (16) is threaded connection and is fixed on condenser lens support (17), light source (3) front installs respectively a desk fan (22) additional, and by bolt-connection fan attachment support (23), fan (22) is dispelled the heat to light source (3).
3. adjustable near infrared fruit pol the cannot-harm-detection device of a kind of illumination parameter according to claim 1, it is characterized in that described data are processed and Operating Interface Module comprises microprocessor (9), microprocessor support (10), micro fiber spectrometer (14), USB line (12), touch display screen (25), 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 fruit sample that optical fiber (13) is passed over, change into numerical information, and pass to microprocessor (9) by USB line (12) and carry out the data processing, microprocessor (9) carries out communication by com port and RS232 line and touch display screen (25); 12V constant voltage dc source (19) is supplied with microprocessor (9) after by the DC/DC transducer, voltage transitions being become to 5V; 12V constant voltage dc source (19) is powered to light source (3) and fan (22) by power lead.
4. adjustable near infrared fruit pol the cannot-harm-detection device of a kind of illumination parameter according to claim 1, it is characterized in that the 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 and detect different fruit position, the purpose of different large fruitlets and variety classes fruit, by changing the position of lamp support (1) in V-shaped rest (6) upper hopper chute (7), can change the size that light source impinges upon intensity on fruit, thereby can detect the fruit of different peel thicknesses and different sizes.
5. adjustable near infrared fruit pol the cannot-harm-detection device of a kind of illumination parameter according to claim 1, the specification that it is characterized in that Halogen lamp LED is 12V, 100W.
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| CN103808689A (en) * | 2014-02-21 | 2014-05-21 | 山东省农业科学院农业质量标准与检测技术研究所 | Five-point near infrared fruit maturity and quality detector |
| CN105092518A (en) * | 2015-06-16 | 2015-11-25 | 江西农业大学 | Navel orange sugar degree rapid nondestructive detection method and device |
| CN106248590A (en) * | 2016-08-03 | 2016-12-21 | 中国农业大学 | A kind of portable non-destructive detecting device of fruit and vegerable and detection method thereof |
| CN108088812A (en) * | 2018-01-16 | 2018-05-29 | 西南大学 | A kind of visible near-infrared transmitted spectrum measuring device |
| CN108318443A (en) * | 2018-01-23 | 2018-07-24 | 黑龙江大学 | Apple sugar content near-infrared detection apparatus based on multi-feature wavelength and its detection method |
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