CN104568763A - Fruit sugar degree detector based on optical sound technique - Google Patents
Fruit sugar degree detector based on optical sound technique Download PDFInfo
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- CN104568763A CN104568763A CN201510030918.5A CN201510030918A CN104568763A CN 104568763 A CN104568763 A CN 104568763A CN 201510030918 A CN201510030918 A CN 201510030918A CN 104568763 A CN104568763 A CN 104568763A
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Abstract
The invention discloses a fruit sugar degree detector based on an optical sound technique. The detector comprises a sample stage on which fruits are placed, an integrated sensor for acquiring optical and acoustic signals of the fruits, a signal amplification circuit, a signal filter circuit, a signal processor, a laser generator and a display screen. The fruit sugar degree detector disclosed by the invention has the following beneficial effects: 1, the detector is non-destructive; 2, the measurement is accurate; and 3, the measuring range is large and the practicability is strong.
Description
Technical field
The present invention relates to sugar degree technical field of nondestructive testing, be specially a kind of sugar degree based on photoacoustic technique and detect meter.
Background technology
Along with the needs of growth in the living standard and fruit industry, people more and more pay attention to for inside quality such as the indexs such as pol, acidity, mouthfeel, defect of fruit.At present for the detection of fruit internal quality, usually based on destructive sample detecting, from fruit, extract juice, adopt optics or chemical method to carry out the mensuration of pol.The results contrast that this method is measured is accurate, but complex operation, and analysis time is long, and testing cost is high, can only carry out sampling analysis to a small amount of fruit.
The device that current employing nondestructiving detecting means detects the inside quality of fruit is also immature, and commercial applications is also less.Japan develops a kind of non-destructive sugar degree meter (AMAMIR TD-2000C) based on reflective near infrared analytic approach, and the sensing range of its pol is 5 ~ 30Brix% (pol), is about 3 seconds detection time.In addition, the country such as Germany, New Zealand, Israel also have developed based on Infrared Spectrum Technology equipment fruit internal quality being carried out to Non-Destructive Testing.Generally, current non-destructive sugar degree meter is mainly based on the technology of near-infrared reflection or transmission spectral analysis method, the transmission range of near infrared light in fruit of reflection or transmission is very short, the signal causing sensor to collect is very faint, the accuracy detected is not high, have impact on the practicality of product.
Summary of the invention
Therefore, in order to overcome the deficiency that prior art exists, the invention provides a kind of sugar degree based on photoacoustic technique and detecting meter.
For solving the problems of the technologies described above, the sugar degree that the present invention is based on photoacoustic technique detects meter and comprises the sample stage being placed with fruit, also comprise the integrated transducer for the photoacoustic signal that collects fruit, signal amplification circuit, signal filter circuit, signal processor, laser generator and display screen, the signals collecting side pressure of described integrated transducer is on the tested surface of fruit, the pulse laser emission end of described laser generator is connected with integrated transducer, the trigger pip output terminal of described laser generator is connected with the signal input part of signal processor, the signal output part of described integrated transducer is connected with the signal input part of signal amplification circuit, the signal output part of described signal amplification circuit is connected with the signal input part of signal filter circuit, the signal output part of described signal filter circuit is connected with the signal input part of signal processor, the signal output part of described signal processor is connected with display screen.
Beneficial effect of the present invention is as follows: 1, non-destructive.What the present invention adopted is the pol that non-destructive technique detects fruit, does not need the juice extracting fruit, convenient to operation.
2. measure accurately.Polynary annular array sensor is adopted and calculates phase-control focusing technology, obtain the pol value of the axial multiple degree of depth of fruit, improve the accuracy of measurement.
3. measurement range is large, practical.Photoacoustic signal has the transmission range more farther than infrared light in fruit, and therefore, the present invention can measure pachydermia fruit, and this is unapproachable based on the saccharometer of traditional infrared spectral technique.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail, wherein:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of integrated transducer of the present invention.
Embodiment
Detect meter below in conjunction with accompanying drawing and the specific embodiment of the present invention to the sugar degree that the present invention is based on photoacoustic technique to make the following instructions.
Embodiment: a kind of sugar degree based on photoacoustic technique detects meter, comprise the sample stage 1 being placed with fruit 2, also comprise the integrated transducer 3 for the photoacoustic signal that collects fruit, signal amplification circuit 4, signal filter circuit 5, signal processor 6, laser generator 8 and display screen 7, the signals collecting side pressure of described integrated transducer 3 is on the tested surface of fruit 2, the pulse laser emission end of described laser generator 8 is connected with integrated transducer 3, the trigger pip output terminal of described laser generator 8 is connected with the signal input part of signal processor 6, the signal output part of described integrated transducer 3 is connected with the signal input part of signal amplification circuit 4, the signal output part of described signal amplification circuit 4 is connected with the signal input part of signal filter circuit 5, the signal output part of described signal filter circuit 5 is connected with the signal input part of signal processor 6, the signal defeated place end of described signal processor 6 is connected with display screen 7.Described integrated transducer 3 comprises optical fiber 301, condenser lens 302, light transmission protecting film 303 and annular array sonac 304, one end of described optical fiber 301 is connected with the pulse laser emission end of laser generator 8, the other end of described optical fiber 301 is connected with condenser lens 302, described light transmission protecting film 303 is arranged on the front of condenser lens 302, protection condenser lens 302 is from pollution, described annular array sonac 304 is distributed in light transmission protecting film 303 circumference, optical fiber 301, condenser lens 302, light transmission protecting film 303 and annular array sonac 304 are coaxial configuration, skin has stainless steel casing 305 to encapsulate.
During measurement, as shown in Figure 1, fruit 2 is placed on sample stage 1, try one's best using round and smooth bright and clean surface upwards as measuring surface, optical fiber 301 will be comprised, condenser lens 302, the integrated transducer 3 of light transmission protecting film 303 and annular array sonac 304, the tested surface of fruit 2 is close to from top to bottom with suitable pressure, laser generator 8 emission pulse laser, a trigger pip is outputted in signal processor 6 simultaneously, pulse laser is after the focusing of condenser lens 302, photoacoustic signal is gone out in fruit 2 internal excitation, photoacoustic signal is detected rear input signal amplifying circuit 4 by annular array sonac 304 and amplifies, signal processor 6 is entered again after the filtering of signal filter circuit 5, signal processor 6 is according to the glucose prediction regression model (formula 1) preset, calculate the pol value of fruit 2, then pol result is exported and show at display screen 7.
C＝α
0+α
1P(λ
1)+α
2P(λ
2)+α
3P(λ
3) (1)
In formula, C represents the pol of fruit, P (λ
1) for wavelength be the photoacoustic spectrum at 940nm place, P (λ
2) for wavelength be the photoacoustic spectrum at 1430nm place, P (λ
3) for wavelength be the photoacoustic spectrum at 1890nm place, α
0, α
1, α
2, α
3for regression coefficient, by utilizing multiple linear regression analysis method to try to achieve to after a large amount of fruit sample test, different fruit, regression coefficient is also different.Such as, the glucose prediction regression model of apple is formula 2
C＝10.306-2.513P(940)+0.286P(1430)+2.745P(1890) (2)
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (2)
1. the sugar degree based on photoacoustic technique detects meter, comprise the sample stage (1) being placed with fruit (2), it is characterized in that: also comprise the integrated transducer (3) for the photoacoustic signal that collects fruit, signal amplification circuit (4), signal filter circuit (5), signal processor (6), laser generator (8) and display screen (7), the signals collecting side pressure of described integrated transducer (3) is on the tested surface of fruit (2), the pulse laser emission end of described laser generator (8) is connected with integrated transducer (3), the trigger pip output terminal of described laser generator (8) is connected with the signal input part of signal processor (6), the signal output part of described integrated transducer (3) is connected with the signal input part of signal amplification circuit (4), the signal output part of described signal amplification circuit (4) is connected with the signal input part of signal filter circuit (5), the signal output part of described signal filter circuit (5) is connected with the signal input part of signal processor (6), the signal output part of described signal processor (6) is connected with display screen (7).
2. the sugar degree based on photoacoustic technique according to claim 1 detects meter, it is characterized in that described integrated transducer (3) comprises optical fiber (301), condenser lens (302), light transmission protecting film (303) and annular array sonac (304), one end of described optical fiber (301) is connected with the pulse laser emission end of laser generator (8), the other end of described optical fiber (301) is connected with condenser lens (302), described light transmission protecting film (303) is arranged on the front of condenser lens (302), described annular array sonac (304) is distributed in light transmission protecting film (303) circumference, described integrated transducer (3) arranged outside has sensor outer housing (305).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510030918.5A CN104568763A (en) | 2015-01-22 | 2015-01-22 | Fruit sugar degree detector based on optical sound technique |
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| CN201510030918.5A CN104568763A (en) | 2015-01-22 | 2015-01-22 | Fruit sugar degree detector based on optical sound technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106423905A (en) * | 2016-11-01 | 2017-02-22 | 无锡艾科瑞思产品设计与研究有限公司 | Kiwi detecting grading device |
| CN109668837A (en) * | 2019-02-28 | 2019-04-23 | 中南民族大学 | Apple internal quality detection system and its method based on optoacoustic spectroscopy |
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| CN103528962A (en) * | 2013-10-28 | 2014-01-22 | 湖南科技学院 | Portable fruit quality nondestructive detection device |
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| CN204439525U (en) * | 2015-01-22 | 2015-07-01 | 江西科技师范大学 | Sugar degree based on photoacoustic technique detects meter |
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Patent Citations (7)
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| US4843847A (en) * | 1986-07-07 | 1989-07-04 | Canadian Patents And Development Limited | Apparatus and method for ultrasonically inspecting articles for internal defects |
| US20040130714A1 (en) * | 2001-03-22 | 2004-07-08 | Werner Gellerman | Optical method and apparatus for determining status of agricultural products |
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| CN106423905A (en) * | 2016-11-01 | 2017-02-22 | 无锡艾科瑞思产品设计与研究有限公司 | Kiwi detecting grading device |
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| CN109668837B (en) * | 2019-02-28 | 2024-01-12 | 中南民族大学 | Apple internal quality detection system and method based on photoacoustic spectrum |
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