CN203849166U - Optical characteristic detection device for agricultural product tissue - Google Patents
Optical characteristic detection device for agricultural product tissue Download PDFInfo
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- CN203849166U CN203849166U CN201420229142.0U CN201420229142U CN203849166U CN 203849166 U CN203849166 U CN 203849166U CN 201420229142 U CN201420229142 U CN 201420229142U CN 203849166 U CN203849166 U CN 203849166U
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- integrating sphere
- light source
- specimen holder
- shaped specimen
- light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/065—Integrating spheres
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Abstract
The utility model discloses an optical characteristic detection device for an agricultural product tissue. The device comprises a light source switching device, a U-shaped sample clamp, an integrating sphere and a spectrometer, wherein the light source switching device, the U-shaped sample clamp and the integrating sphere are coaxially mounted; an adapting sphere cover of a detection port of the integrating sphere is connected with the spectrometer through an optical detection fiber; the spectrometer is connected with a computer; a stepping motor in the light source switching device is connected with a control system. According to the device, the control system controls the light source switching device to be freely switched among a plurality of light sources, and spectral data of an agricultural product sample are acquired by using the integrating sphere and the spectrometer, and are input and calculated to obtain optical characteristic parameters of the agricultural product tissue. The control system based on a singlechip microcomputer controls the light source switching device to be freely switched among the plurality of light sources; by virtue of the complementation of the plurality of light sources, light beams are high in energy density in the whole continuous detection wavelength range, detection requirements can be met, and the optical characteristic parameters of the agricultural product tissue in a wide continuous wavelength range can be obtained.
Description
Technical field
The utility model relates to optical characteristics pick-up unit, relates in particular to a kind of farm product tissue optical characteristics pick-up unit.
Background technology
Spectral analysis technique is very extensive in the application in Analyzing The Quality of Agricultural Products field, consider the inconvenience that the diversity of agricultural product form and the complicacy specified rate analysis of structure bring, the analytical approach that it adopts mostly at present is statistical modeling, set up the correlation model between sample concentration and absorbance by scanning a large amount of sample spectra, and then the concentration information of prediction unknown sample.
The people such as Cheong have summed up the inventory of a measurement biological tissue optical parameter in nineteen ninety, wherein enumerated a large amount of biological tissue optical parameter measurement results and corresponding measuring method thereof, for follow-up research work provides abundant reference; But the object of these researchs concentrates on tissue or animal tissue mostly, the current less corresponding report of seeing for agricultural product biological tissue.So we just seem very important to the detection research of agricultural product biological tissue optical parameter.
The method that can be used for the detection of farm product tissue optical characteristics mainly contains: the spatial discrimination technology based on continuous light source and integrating sphere technology.Spatial discrimination technology based on continuous light source adopts the situation of change of passing through optical fiber or CCD detector acquisition diffuse light distribution within the scope of suitable tissue surface, then extrapolates the optical parametric of tissue by Nonlinear Quasi hop algorithm.Be practically applicable to the quick nondestructive of agricultural product to detect.Integrating sphere technology is compared spatial discrimination diffuse reflection technology and is had higher precision, and integrating sphere technology comprises simple integral ball and biproduct bulb separation.
When biproduct bulb separation detects sample, can obtain diffuse reflectance Rd, diffuse transmittance Td and collimated transmittance Tc, by calculating the optical property parameter of sample simultaneously.When simple integral ball detects sample, substep obtains diffuse reflectance Rd, diffuse transmittance Td and collimated transmittance Tc.By calculating the optical property parameter of sample.
Above-mentioned two kinds of technology are in the time detecting the optical property parameter of sample, light source adopts laser instrument conventionally, the number of wavelengths of existing laser instrument is less, cannot obtain the optical property parameter of the agricultural product sample in continuous wavelength coverage, as use single continuous light source, due to the restriction of light source energy spectral density, detecting wavelength coverage when wider, energy density in particular range of wavelengths is less, cannot meet the needs of detection.
Utility model content
The purpose of this utility model is to provide a kind of farm product tissue optical characteristics pick-up unit, detection light source can freely be switched between multiple light sources, by the complementation between multiple light sources, there is higher energy density at whole continuous detecting wavelength coverage inner light beam, can meet the demand of detection, to obtain the farm product tissue optical property parameter within the scope of wider continuous wavelength.
The technical solution of the utility model is as follows:
The utility model comprises light supply apparatus, U-shaped specimen holder, integrating sphere and spectrometer, and light supply apparatus, U-shaped specimen holder and integrating sphere are coaxially installed, and the switching spherical cap of the detection mouth of integrating sphere is connected with spectrometer by detection fiber, and spectrometer is connected with computing machine, described light supply apparatus is light source switching mechanism, comprises stepper motor, spring coupling, screw mandrel, slide unit, optic fibre adminiculum, baffle plate, light hole, two directive slide tracks, base and reflective photoelectric switches, two parallel both sides that are fixed on base top of directive slide track, be positioned at two screw mandrels between directive slide track and be arranged on base top, two directive slide tracks are parallel with screw mandrel, one end of screw mandrel is connected with stepping motor rotating shaft by spring coupling, slide unit bottom surface and screw mandrel form screw pair, slide unit bottom surface and two directive slide tracks form sliding pair, optic fibre adminiculum is fixed on slide unit, optic fibre adminiculum upper surface level and many luminous source optical fibers are equidistantly installed, many luminous source optical fibers and screw mandrel are perpendicular, baffle plate is arranged on the base side near integrating sphere one side, reflective photoelectric switch is fixed on baffle plate, be provided with light hole with the baffle plate of luminous source optical fiber center same level, light hole is positioned on the position that screw mandrel mid point is corresponding, light hole center, luminous source optical fiber center and U-shaped specimen holder are centered close to same plane, stepper motor is connected with control system.
Described control system: comprise single-chip microcomputer, display screen, keyboard, motor driver; Display screen, keyboard, reflective photoelectric switch are connected with single-chip microcomputer, and single-chip microcomputer is connected with stepper motor by motor driver.
In the time measuring the total diffuse reflection of sample tissue, described U-shaped specimen holder is close to the sample port side away from integrating sphere one side of light source switching mechanism.
In the time measuring the total transmission of sample tissue, described U-shaped specimen holder is close to the sample port side near integrating sphere one side of light source switching mechanism.
In the time measuring the transmission of sample tissue collimation, described U-shaped specimen holder is between light source switching mechanism and integrating sphere.
Respectively there is a circular hole tow sides center of described U-shaped specimen holder, and wherein one side is provided with screw, and the bottom of U-shaped specimen holder is provided with screw.
The beneficial effects of the utility model are:
Adopt SCM Based control system control light source switching mechanism freely to switch between multiple light sources, by the complementation between multiple light sources, there is higher energy density at whole continuous detecting wavelength coverage inner light beam, the demand of detection can be met, the farm product tissue optical property parameter within the scope of wider continuous wavelength can be obtained.
Brief description of the drawings
Fig. 1 is structural perspective of the present utility model.
Fig. 2 is Fig. 1 light source switching mechanism structure diagonal view.
Fig. 3 is the part sectioned view of the utility model integrating sphere-U-shaped specimen holder-light source switching mechanism.
Fig. 4 is the front view of U-shaped specimen holder.
Fig. 5 is the left view of Fig. 4.
Fig. 6 is the vertical view of Fig. 4.
Fig. 7 is control system structured flowchart.
Fig. 8 is working-flow figure.
Arrangenent diagram when Fig. 9 is the total diffuse reflection of test.
Arrangenent diagram when Figure 10 is the total transmission of test.
Arrangenent diagram when Figure 11 is the transmission of test collimation.
Figure 12 is the circuit diagram of control system.
In figure: 1, control system, 2, light source switching mechanism, 3, U-shaped specimen holder, 4, integrating sphere, 5, conversion spherical cap, 6, spherical cap, 7, detection fiber, 8, spectrometer, 9, sample, 101, motor drives, 102, single-chip microcomputer, 103, display screen, 104, keyboard, 201, stepper motor, 202, spring coupling, 203, screw mandrel, 204, slide unit, 205, optic fibre adminiculum, 206, baffle plate, 207, luminous source optical fiber, 208, light hole, 209, directive slide track, 210, base, 211, reflective photoelectric switch, 301, circular hole, 302, threaded hole, 901, piezoid.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
As shown in Figure 1, a kind of pick-up unit detecting for farm product tissue optical characteristics, comprise control system 1, light source switching mechanism 2, U-shaped specimen holder 3, integrating sphere 4, switching spherical cap 5, spherical cap 6, detection fiber 7 and spectrometer 8, wherein: light source switching mechanism 2 can connect outside LASER Light Source; The detection mouth of integrating sphere 4 is equipped with switching spherical cap 5, and switching spherical cap 5 is connected with spectrometer 8 by detection fiber 7, and spectrometer 8 is connected with computing machine (not shown).
As shown in Figure 2, light source switching mechanism 2 comprises stepper motor 201, spring coupling 202, screw mandrel 203, slide unit 204, optic fibre adminiculum 205, baffle plate 206, light hole 208, directive slide track 209, base 210 and reflective photoelectric switch 211; Directive slide track 209 is fixed on the top of base 210, screw mandrel 203 is arranged on base 210 tops, and be connected with stepper motor 201 turning axles by spring coupling 202, directive slide track 209 is parallel with screw mandrel 203, slide unit 204 is arranged on directive slide track 209 and screw mandrel 203 simultaneously, optic fibre adminiculum 205 is fixed on slide unit 204, optic fibre adminiculum 205 upper surface levels and many luminous source optical fibers 207 are equidistantly installed, baffle plate 206 is arranged on luminous source optical fiber 207 tops, and reflective photoelectric switch 211 is fixed on baffle plate 206.
As shown in Figure 3, baffle plate 206 is provided with light hole 208 in luminous source optical fiber 207 same levels and on the position corresponding with screw mandrel 203 mid points, and light hole 208 centers, luminous source optical fiber 207 centers and U-shaped specimen holder 3 are centered close to same plane.
As shown in Figure 4, respectively there is a circular hole 301 U-shaped specimen holder 3 tow sides centers.
As shown in Figure 5, sample 9 is fixed in the U-shaped groove of U-shaped specimen holder 3.
As shown in Figure 6, U-shaped specimen holder 3 is fixed in light path by the screw 302 of U-shaped specimen holder 3 bottoms.
As shown in Fig. 7, Figure 12, control system 1 comprises single-chip microcomputer 102, display screen 103, keyboard 104, motor driver 101, display screen 103, keyboard 104, reflective photoelectric switch 211 are connected with single-chip microcomputer 102, and single-chip microcomputer 102 is connected with stepper motor 201 by motor driver 101.
As shown in Figure 8, the utility model adopts SCM Based control system control light source switching mechanism freely to switch between multiple light sources, use integrating sphere to gather the total transmittance of agricultural product sample under Different Light is irradiated, the spectroscopic data of total diffuse reflectance and collimated transmittance, the data input IAD xp-version-3-9-10 program obtaining is calculated to (Prahl, S., " Everything I think you should know about Inverse Adding-Doubling, " 2011) obtain the optical property parameter of Agricultural Products tissue: absorption coefficient μ
aspectrum, scattering coefficient μ
sspectrum and anisotropy factor g spectrum.
As shown in Figure 9, in the time measuring the total diffuse reflection of sample tissue, described U-shaped specimen holder 3 is close to the sample port side away from integrating sphere 4 one sides of light source switching mechanism 2.
As shown in figure 10, in the time measuring the total transmission of sample tissue, described U-shaped specimen holder 3 is close to the sample port side near integrating sphere 4 one sides of light source switching mechanism 2.
As shown in figure 11, in the time measuring the transmission of sample tissue collimation, described U-shaped specimen holder 3 is between light source switching mechanism 2 and integrating sphere 4.
An embodiment below:
Spectrometer adopts MAYA2000PRO, and integrating sphere adopts Lapsphere4P-GPS-040-SF, and optical fiber source and detection fiber adopt QP1000-2-VIS-BX.
As shown in figure 12, stepper motor 201 adopts two-phase four-wire system stepper motor, and correspondingly, motor driver 101 adopts UNL2803.Single-chip microcomputer 102 adopts STC89C52.Display screen 103 adopts 1602 type LCD display.Keyboard 104 adopts resistance R 5, button S1, and button S2, button S3, button S4 and capacitor C 4 form.Reflective photoelectric switch 105 adopts RPR220.
Introduce operating process of the present utility model below in conjunction with Fig. 1～Figure 11.
The sample 9 that piezoid 901 is clamped is put into U-shaped specimen holder 3, and as shown in Figure 9, device is placed by total diffuse reflection pattern.
1) press S1 button, S2 button selection fiber count, press S3 button starter gear;
2) single-chip microcomputer 102 produces driving pulse, rotate by motor driver 101 Driving Stepping Motors 201, stepper motor 201 drive screw mandrel 203 drive slide unit 204 and on structure of fiber_optic 205 move to the just light hole 208 to baffle plate 206 of luminous source optical fiber a207 from initial position, now reflective photoelectric switch 105 triggers, single-chip microcomputer 103 responses are interrupted, stepper motor 201 stops---and the light beam that luminous source optical fiber a207 sends is through light hole 208, after the circular hole 301 of U-shaped specimen holder 3, be radiated on sample 9, after the inner multiple reflections of integrating sphere 4, arrive spectrometer 8 by the detection fiber 7 being connected on integrating sphere 4 through the transmitted light after sample 9, record the total diffuse reflectance spectrum Rd0 under this wave band,
3) in single-chip microcomputer 103, follow procedure preset value stays for some time;
4) single-chip microcomputer 102 produces the driving pulse of some again, rotate by motor driver 101 Driving Stepping Motors 201, stepper motor 201 drive screw mandrel 203 drive slide unit 204 and on structure of fiber_optic 205 move, make the just light hole 208 to baffle plate 206 of next root luminous source optical fiber b207, the light beam that luminous source optical fiber b207 sends is through light hole 208, after the circular hole 301 of U-shaped specimen holder 3, be radiated on sample 9, after the inner multiple reflections of integrating sphere 4, arrive spectrometer 8 by the detection fiber 7 being connected on integrating sphere 4 through the transmitted light after sample 9, record the total diffuse reflectance spectrum Rd1 under this wave band,
5) repeat 4) step, until diffuse reflectance spectrum Rd2, Rd3 ... obtain Deng all;
6) press S4 button, single-chip microcomputer 102 produces the reverse drive pulse of some, drives slide unit 204 to get back to the left side.
7) mobile example 9, as shown in figure 10, device is placed by total transmission mode, repeating step 1)-5), record total transmittance spectrum Td0, Td1, Td2 ...
8) as shown in figure 11, device is placed by collimation transmission mode, and process is measured with above-mentioned total diffuse reflectance, obtains and record collimated transmittance spectrum Tc0, Tc1, Tc2 ...
9) data Rd0, the Rd1, the Rd2 that obtain ..., Td0, Td1, Td2 ..., Tc0, Tc1, Tc2 ... with corresponding wavelength W0, W1, W2 ... substitution IAD xp-version-3-9-10 program is calculated:
1. program is carried out initialization, input detection systems information;
2. the data that input obtains, the input format of data is as follows:
3. program is exported optical property parameter corresponding to sample after calculating: absorption coefficient μ
a0, μ
a1, μ
a2, scattering coefficient μ
s0, μ
s1, μ
s2, anisotropic coefficient g0, g1, g2 ...
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of the technical program, it all should be encompassed in claim scope of the present utility model.
Claims (6)
1. a farm product tissue optical characteristics pick-up unit, comprises light supply apparatus, U-shaped specimen holder (3), integrating sphere (4) and spectrometer (8), light supply apparatus, U-shaped specimen holder (3) and integrating sphere (4) are coaxially installed, and the switching spherical cap (5) of the detection mouth of integrating sphere (4) is connected with spectrometer (8) by detection fiber (7), and spectrometer (8) is connected with computing machine, it is characterized in that: described light supply apparatus is light source switching mechanism (2), comprise stepper motor (201), spring coupling (202), screw mandrel (203), slide unit (204), optic fibre adminiculum (205), baffle plate (206), light hole (208), two directive slide tracks (209), base (210) and reflective photoelectric switch (211), the parallel both sides that are fixed on base (210) top of two directive slide tracks (209), the screw mandrel (203) being positioned between two directive slide tracks (209) is arranged on base (210) top, two directive slide tracks (209) are parallel with screw mandrel (203), one end of screw mandrel (203) is connected with stepper motor (201) rotating shaft by spring coupling (202), slide unit (204) bottom surface and screw mandrel (203) form screw pair, slide unit (204) bottom surface and two directive slide tracks (209) form sliding pair, optic fibre adminiculum (205) is fixed on slide unit (204), optic fibre adminiculum (205) upper surface level and many luminous source optical fibers (207) are equidistantly installed, many luminous source optical fibers (207) are perpendicular with screw mandrel (203), baffle plate (206) is arranged on base (210) side near integrating sphere (4) one sides, reflective photoelectric switch (211) is fixed on baffle plate (206), be provided with light hole (208) with the baffle plate (206) of luminous source optical fiber (207) center same level, light hole (208) is positioned on the position that screw mandrel (203) mid point is corresponding, light hole (208) center, luminous source optical fiber (207) center and U-shaped specimen holder (3) are centered close to same plane, stepper motor (201) is connected with control system (1).
2. a kind of farm product tissue optical characteristics pick-up unit according to claim 1, is characterized in that, described control system (1): comprise single-chip microcomputer (102), display screen (103), keyboard (104), motor driver (101); Display screen (103), keyboard (104), reflective photoelectric switch (211) are connected with single-chip microcomputer (102), and single-chip microcomputer (102) is connected with stepper motor (201) by motor driver (101).
3. a kind of farm product tissue optical characteristics pick-up unit according to claim 1, it is characterized in that, in the time measuring the total diffuse reflection of sample tissue, described U-shaped specimen holder (3) is close to the sample port side away from integrating sphere (4) one sides of light source switching mechanism (2).
4. a kind of farm product tissue optical characteristics pick-up unit according to claim 1, it is characterized in that, in the time measuring the total transmission of sample tissue, described U-shaped specimen holder (3) is close to the sample port side near integrating sphere (4) one sides of light source switching mechanism (2).
5. a kind of farm product tissue optical characteristics pick-up unit according to claim 1, is characterized in that, in the time measuring the transmission of sample tissue collimation, described U-shaped specimen holder (3) is positioned between light source switching mechanism (2) and integrating sphere (4).
6. a kind of farm product tissue optical characteristics pick-up unit according to claim 1, it is characterized in that, respectively there is a circular hole (301) the tow sides center of described U-shaped specimen holder (3), and wherein one side is provided with screw, and the bottom of U-shaped specimen holder (3) is provided with screw (302).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420229142.0U CN203849166U (en) | 2014-05-06 | 2014-05-06 | Optical characteristic detection device for agricultural product tissue |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420229142.0U CN203849166U (en) | 2014-05-06 | 2014-05-06 | Optical characteristic detection device for agricultural product tissue |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940766A (en) * | 2014-05-06 | 2014-07-23 | 浙江大学 | Device for detecting optical properties of agricultural product texture |
| CN104677845A (en) * | 2015-02-15 | 2015-06-03 | 浙江大学 | Agricultural product tissue optical property automatic detection device based on integrating sphere |
| CN106153940A (en) * | 2014-10-17 | 2016-11-23 | 广州瑞博奥生物科技有限公司 | A kind of antibody chip test kit for detecting angiogenesis factor |
| CN109612969A (en) * | 2018-12-12 | 2019-04-12 | 闽江学院 | A kind of chroma and luminance measurement device can be used for long-persistence luminous object and test method |
-
2014
- 2014-05-06 CN CN201420229142.0U patent/CN203849166U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940766A (en) * | 2014-05-06 | 2014-07-23 | 浙江大学 | Device for detecting optical properties of agricultural product texture |
| CN106153940A (en) * | 2014-10-17 | 2016-11-23 | 广州瑞博奥生物科技有限公司 | A kind of antibody chip test kit for detecting angiogenesis factor |
| CN104677845A (en) * | 2015-02-15 | 2015-06-03 | 浙江大学 | Agricultural product tissue optical property automatic detection device based on integrating sphere |
| CN104677845B (en) * | 2015-02-15 | 2017-04-05 | 浙江大学 | Farm product tissue optical characteristics automatic detection device based on integrating sphere |
| CN109612969A (en) * | 2018-12-12 | 2019-04-12 | 闽江学院 | A kind of chroma and luminance measurement device can be used for long-persistence luminous object and test method |
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Granted publication date: 20140924 Effective date of abandoning: 20160330 |
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