CN111044457B - Multifunctional device for detecting internal light distribution and internal quality of agricultural products - Google Patents
Multifunctional device for detecting internal light distribution and internal quality of agricultural products Download PDFInfo
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- CN111044457B CN111044457B CN201911279889.0A CN201911279889A CN111044457B CN 111044457 B CN111044457 B CN 111044457B CN 201911279889 A CN201911279889 A CN 201911279889A CN 111044457 B CN111044457 B CN 111044457B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
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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
- G01N2201/061—Sources
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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
- G01N2201/08—Optical fibres; light guides
- G01N2201/0853—Movable fibre optical member, e.g. for scanning or selecting
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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
- G01N2201/10—Scanning
- G01N2201/103—Scanning by mechanical motion of stage
Abstract
The invention discloses a multifunctional device for detecting internal light distribution and internal quality of agricultural products. The system mainly comprises a light source system, a spectrum acquisition system and a puncture detection system, wherein the light source system realizes the functions of rotating around the agricultural product to be detected for illumination, automatically shading and the like; the spectrum acquisition system realizes the functions of clamping and fixing agricultural products, rotating detection, transmission spectrum acquisition and the like; the puncture detection system realizes the puncture detection of agricultural products and obtains the light distribution information in the agricultural products. The invention is especially suitable for agricultural products such as oranges, melons, vegetables and the like, can develop an internal light distribution detection test by puncture optical fiber puncture detection, an optical characteristic test by rotation detection of an optical source component, an internal quality detection test of the agricultural products by collecting transmission spectrum by a collimating mirror and the like, and is a multifunctional device for internal light distribution detection, optical characteristic detection and internal quality detection of the agricultural products.
Description
Technical Field
The invention relates to an agricultural product detection device, in particular to a multifunctional device for detecting internal light distribution and internal quality of agricultural products, which is used for internal light distribution detection, spectrum detection and optical characteristic analysis of agricultural products such as honey pomelos, oranges, melons, onions, cabbages and the like.
Background
The spectrum detection is used as a nondestructive detection technology which is most widely applied, is green and rapid, and can detect the internal quality indexes of agricultural products, such as water content, soluble solids and the like. The spectrum detection mainly comprises the steps that after the light irradiates or penetrates through the tissues of the agricultural products, the internal components absorb light with specific wavelengths, so that the received spectrum information carries internal component information, and then the quality of the agricultural products is predicted by analyzing and extracting the spectrum information and applying a statistical modeling mode.
The spectrum detection steps mainly comprise spectrum acquisition, spectrum information preprocessing, spectrum information analysis and extraction, spectrum modeling prediction and the like. The spectrum acquisition module is the key of the spectrum detection system and determines the reliability of an original spectrum, the complexity of later-stage spectrum data analysis and the accuracy and stability of a prediction model.
The design and optimization of the spectrum acquisition module involves many parameters such as light source type, illumination angle, light source intensity, etc. Under different parameters, the tissue depth penetrated by the light and the extracted tissue information are also greatly different. The propagation of light within the tissue is disordered, requiring extensive experimentation and difficult to accurately track and calculate. The prior art lacks a device capable of accurately acquiring the light distribution in the agricultural product and optimizing the complex parameters of the spectrum acquisition module.
Disclosure of Invention
In order to solve the problems in the background art, aim at internal light distribution and optical characteristic detection of agricultural products, and optimize a spectrum detection unit, and aim at obtaining more stable and reliable spectrum detection data, the invention provides a multifunctional device for internal light distribution and internal quality detection of agricultural products, which is particularly suitable for large fruits and vegetables such as honey pomelos, oranges, melons and the like, can be used for developing an internal light distribution detection test by utilizing puncture optical fiber puncture detection, an optical characteristic test by utilizing light source component rotation detection, a transmission spectrum detection test by utilizing a collimating mirror to collect spectrum and the like, and is a multifunctional test bed for internal light distribution detection, optical characteristic detection and internal quality spectrum detection of agricultural products.
The invention adopts the following specific technical scheme:
the invention comprises an optical flat plate, and a light source system, a spectrum acquisition system and a puncture detection system which are arranged on the optical flat plate.
The light source system comprises a short supporting rod, a hollow electric rotary table, a light source supporting plate and a light source assembly; the base of the hollow electric turntable is fixedly installed on the optical flat plate through four short supporting rods, the light source supporting plate is horizontally arranged, one side part of the light source supporting plate is installed on a rotating platform of the hollow electric turntable and driven by the hollow electric turntable to rotate around the center, the light source assembly can be installed on the other side part of the light source supporting plate along the direction close to/far away from the hollow electric turntable, and the light source assembly rotates around the center of the hollow electric turntable along with the light source supporting plate under the driving of the hollow electric turntable.
The spectrum acquisition system comprises a support column, an electric rotary table, a manual lifting table, a fruit cup, a collimating mirror U-shaped clamp holder, a collimating mirror flange, a collimating mirror and a positioning rod; the electric rotary table is fixed on the optical flat plate and arranged below the hollow electric rotary table, an output shaft of the electric rotary table is upward and coaxially connected with the lower end of the support column, the upper end of the support column penetrates through a middle through hole of the hollow electric rotary table and then is fixedly connected with the bottom of the manual lifting table, the fruit cup is arranged on the manual lifting table, and the electric rotary table, the support column, the fruit cup and the hollow electric rotary table are arranged in a vertical coaxial line; the positioning rod is vertically arranged, the bottom end of the positioning rod is fixed on the optical flat plate and is positioned at the side of the hollow electric turntable; the bottom of an agricultural product to be tested is placed in the lower fruit cup, the upper fruit cup covers the top of the agricultural product to be tested, so that the agricultural product to be tested is clamped between the upper fruit cup and the lower fruit cup, and the upper fruit cup and the lower fruit cup are arranged coaxially with the axis; a collimating mirror flange is fixed on the upper fruit cup, one end of a collimating mirror U-shaped clamping device is fixed on the positioning rod through an external locking positioner and ascends and descends along the positioning rod to adjust the height, the other end of the collimating mirror U-shaped clamping device is arranged into a U-shaped structure, the U-shaped structure is connected to the collimating mirror flange, and the collimating mirror flange and the upper fruit cup are pressed tightly to be attached to agricultural products to be measured; the collimating lens is arranged in the inner cylinder wall of the collimating lens flange, and the output end of the collimating lens is electrically connected with an external optical fiber spectrometer.
The puncture detection system comprises an electric translation table, a manual translation table, a long support rod, an optical fiber positioner, an optical fiber holder, a puncture optical fiber and an optical fiber positioning plate; the optical fiber positioning device comprises an electric translation table, a manual translation table, an optical fiber positioning plate and a light source system, wherein the electric translation table is fixed on an optical flat plate, the horizontal central axis of the electric translation table is coplanar with the vertical axis of a hollow electric turntable of the light source system, the manual translation table is installed on a moving platform of the electric translation table, the moving direction of the manual translation table is vertical to that of the electric translation table, and the optical fiber positioning plate is fixed on the moving platform of the manual translation; the optical fiber holder is embedded in two vertical parallel mounting grooves on the optical fiber positioning plate and vertically ascends and descends along the mounting grooves to adjust the mounting height; the two long supporting rods are vertically arranged, the bottom ends of the two long supporting rods are fixed on the optical flat plate, the two long supporting rods are positioned between the electric translation table and the hollow electric turntable, and the optical fiber positioner is arranged on the two long supporting rods; the puncture optical fiber is horizontally clamped on the optical fiber holder, and a puncture head of the puncture optical fiber passes through the horizontal through hole of the optical fiber positioner and then extends to the position near the agricultural product; the other optical fiber connecting end of the puncture optical fiber is electrically connected with an external optical fiber spectrometer.
The light source component comprises a halogen tungsten lamp, an L-shaped lamp bracket, a flange, a light screen, a light source base, a light source bracket, a stepping motor and a lamp barrel; the bottom surface of the light source base is provided with two parallel strip-shaped grooves, the strip-shaped grooves of the light source base are connected and installed on the light source supporting plate through bolts, so that the light source base can move and be adjusted on the light source supporting plate along the direction close to/far from the hollow electric turntable, two sides of the middle of the light source base are both fixed with upward folded edges, and the upward folded edges are fixedly connected with a light source bracket; the halogen tungsten lamp is arranged on one side, away from the hollow electric rotary table, of the top of the light source support through the L-shaped lamp support, and the installation position of the halogen tungsten lamp can be adjusted along the direction away from/close to the hollow electric rotary table; a light through hole is formed in one side, close to the hollow electric rotary table, of the top of the light source support, and the lamp barrel is installed at the light through hole; the center of the halogen tungsten lamp and the axial lead of the lamp barrel are positioned on the same horizontal straight line, the halogen tungsten lamp horizontally emits a light beam to the agricultural product to be detected on the hollow electric turntable, and the light beam penetrates through the light through hole and the lamp barrel and then irradiates the agricultural product to be detected; the stepping motor is fixedly arranged in the middle of the light source bracket, the output shaft end of the stepping motor passes through a shaft hole on the light source bracket and then is coaxially connected with the light screen through a flange, the light screen is a disc provided with a fan-shaped notch, and the light screen is driven to rotate by the stepping motor to realize whether the light source generated by the halogen tungsten lamp is shielded or not; the light source bracket above the halogen tungsten lamp is provided with a cooling fan, and the side surface of the upper part of the light source bracket is provided with a scattering fan.
Puncture optic fibre one end be the optic fibre link, the other end is stainless steel parcel's puncture head, the puncture head terminal surface has the hemisphere lens that equals with puncture head tip diameter through optical cement fixed pasting, the outer peripheral face of puncture head place section is equipped with the external screw thread, the optic fibre holder hole is equipped with the internal thread, puncture optic fibre passes through the internal and external screw thread cooperation suit in the optic fibre holder hole.
The agricultural product to be detected is rotated by the electric turntable, so that different parts face the puncture head of the puncture optical fiber, and detection of different position points is realized; meanwhile, the angle of the light source component irradiating towards the puncture optical fiber is adjusted through the rotation of the light source supporting plate on the hollow electric rotary table around the hollow electric rotary table, so that the internal light distribution detection of the agricultural product to be detected with different illumination-detector angles is realized.
The agricultural products to be detected are honey pomelos, oranges, melons, onions, cabbages and the like, but are not limited to the above.
The invention has the following beneficial effects:
the invention can adopt a puncture optical fiber detection method to detect the internal light distribution condition of the agricultural product, know the influence of the optical characteristics of the tissue of the agricultural product on the spectral detection stability, and simultaneously can acquire transmission spectral data for spectral nondestructive detection; further, the spectrum light source module can be optimized through internal light distribution detection, and more stable and reliable spectrum detection data can be obtained.
The invention can develop an internal light distribution detection test by puncture detection of the puncture optical fiber, an optical characteristic test by rotation detection of the light source component, a transmission spectrum detection test by spectrum collection of the collimating lens and the like, and is a multifunctional test for internal light distribution detection, optical characteristic detection and spectrum detection unit optimization of agricultural products.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a right side view of the present invention;
FIG. 3 is a right side view, B-B, cross-sectional view of the present invention;
FIG. 4 is a cross-sectional view taken along plane A-A of the fiber optic assembly and an enlarged view of a portion of I, II;
FIG. 5 is an isometric view and a front view of a light source assembly;
FIG. 6 is a schematic view of a light source holder;
FIG. 7 is a front view of the shutter plate;
FIG. 8 is an isometric view of a fruit cup;
FIG. 9 is a schematic view of a collimator lens U-shaped holder;
figure 10 is an isometric view of a hollow power turret;
in the figure: 1. an optical flat plate; 2. an electric translation stage; 3. a manual translation stage; 4. supporting a column; 5. an electric turntable; 6. a short strut; 7. a hollow electric turntable; 7a, a base; 7b, rotating the platform; 8. a light source support plate; 9. a manual lifting platform; 10a and 10b, fruit cups; 11. a light source assembly; 12. a collimating mirror U-shaped holder; 13. a collimating mirror flange; 14. a collimating mirror; 15. a long strut; 16. an optical fiber positioner; 17. an optical fiber holder; 18. puncturing the optical fiber; 19. an optical fiber positioning plate; 20. positioning a rod; 21a and 21b, a heat radiation fan; 22. a halogen tungsten lamp; 23. an L-shaped lamp holder; 24. a flange; 25. a visor; 26. a light source base; 27. a light source holder; 27a, a mounting groove; 27b, a light through hole; 27c, heat dissipation holes; 27d, a height adjusting groove; 27e, a vent hole; 27f, a shaft hole; 28. a stepping motor; 29. a lamp barrel; 30. an external lock locator; 31. an agricultural product.
Detailed Description
The present invention will be further described with reference to the drawings and the specific embodiments by taking the measurement of the internal light distribution of honey pomelo as an example.
As shown in FIG. 1, the present invention comprises an optical flat plate 1, and a light source system, a spectrum collection system and a puncture detection system mounted on the optical flat plate 1.
The light source system comprises a short supporting rod 6, a hollow electric rotary table 7 (as shown in fig. 10, composed of a base 7a and an annular hollow rotary platform 7b), a light source supporting plate 8 and a light source assembly 11; a base (7a) of the hollow electric turntable 7 is fixedly arranged on the optical flat plate 1 through four short supporting rods 6, a light source supporting plate 8 is horizontally arranged, one side part of the light source supporting plate 8 is arranged on a rotating platform (7b) of the hollow electric turntable 7 and is driven by the hollow electric turntable 7 to rotate around the center, the top of the hollow electric turntable 7 is provided with an annular rotating platform (7b), the light source supporting plate 8 is fixed on the annular rotating platform, a light source component 11 can be arranged on the other side part of the light source supporting plate 8 along the direction close to/far away from the hollow electric turntable 7 and can movably move to adjust the distance from the center of the hollow electric turntable 7, and the light source component 11 rotates around the center of the hollow electric turntable 7 along with the light source supporting plate;
as shown in fig. 1 and 2, the spectrum collection system includes a support column 4, an electric turntable 5, a manual lifting table 9, fruit cups 10a and 10b, a collimator U-shaped holder 12, a collimator flange 13, a collimator 14, and a positioning rod 20; the electric rotary table 5 is fixed on the optical flat plate 1 and arranged below the hollow electric rotary table 7, an output shaft of the electric rotary table 5 faces upwards and is coaxially connected with the lower end of the support column 4, the upper end of the support column 4 penetrates through a middle through hole of the hollow electric rotary table 7 and then is fixedly connected with the bottom of the manual lifting table 9, the fruit cup 10a is installed on the manual lifting table 9, and the electric rotary table 5, the support column 4, the lower fruit cup 10a and the hollow electric rotary table 7 are arranged in a vertical coaxial line; the electric turntable 5 operates to drive the horizontal plane of the lower fruit cup 10a and the agricultural product 31 to be measured thereon to rotate through the support column 4; the positioning rod 20 is vertically arranged, the bottom end of the positioning rod is fixed on the optical flat plate 1, and the positioning rod is positioned on the side of the hollow electric turntable 7; the bottom of an agricultural product 31 to be tested is placed in the lower fruit cup 10a, the upper fruit cup 10b covers the top of the agricultural product 31 to be tested, so that the agricultural product 31 to be tested is clamped between the upper fruit cup 10b and the lower fruit cup 10a, and the upper fruit cup 10b and the lower fruit cup 10a are arranged coaxially with each other up and down; a collimating mirror flange 13 is fixed on the upper fruit cup 10b, one end of a collimating mirror U-shaped clamping device 12 is fixed on a positioning rod 20 through an external locking positioner 30, the collimating mirror U-shaped clamping device is lifted up and down along the positioning rod 20 to adjust the height, the other end of the collimating mirror U-shaped clamping device 12 is arranged into a U-shaped structure, the U-shaped structure is connected to the collimating mirror flange 13, an opening of the U-shaped structure accommodates the middle of the collimating mirror flange 13 to pass through, two sides of the U-shaped structure are pressed on a flange at the edge of the collimating mirror flange 13, and the collimating mirror flange 13 and the upper fruit cup 10b are pressed to be attached; the collimating lens 14 is arranged in the inner cylinder wall of the collimating lens flange 13, and the output end of the collimating lens 14 is electrically connected with an external optical fiber spectrometer to output acquired spectral data, so that the internal quality detection of the agricultural product 31 to be detected can be conveniently obtained through analysis;
as shown in fig. 9, the fruit cup 10 is made of rubber, 4 nuts are embedded in the bottom surface of the fruit cup to facilitate fixing with other parts, and the top surface of the fruit cup is of a multi-layer sponge structure to facilitate attaching to the surface of agricultural products.
As shown in fig. 3, the puncture detection system includes an electric translation stage 2, a manual translation stage 3, a long support rod 15, a fiber positioner 16, a fiber holder 17, a puncture fiber 18, and a fiber positioning plate 19; the electric translation stage 2 is fixed on the optical flat plate 1, the horizontal central axis of the electric translation stage 2 is coplanar with the vertical axis line of a hollow electric turntable 7 of a light source system, the manual translation stage 3 is installed on a moving platform of the electric translation stage 2, the moving direction of the manual translation stage 3 is perpendicular to the moving direction of the electric translation stage 2, the optical fiber positioning plate 19 is fixed on the moving platform of the manual translation stage 3, the electric translation stage 2 drives the manual translation stage 3 to move in the direction close to/far away from the agricultural product 31 to be measured on the hollow electric turntable 7, and the manual translation stage 3 drives the optical fiber positioning plate 19 to move in the direction perpendicular to the direction close to/far away from the agricultural product 31 to be measured on the hollow electric turntable 7; the optical fiber holder 17 is embedded in two vertical parallel mounting grooves on the optical fiber positioning plate 19 and vertically ascends and descends along the mounting grooves to adjust the mounting height, and the height can be adjusted as required; the two long supporting rods 15 are vertically arranged, the bottom ends of the two long supporting rods 15 are fixed on the optical flat plate 1, the two long supporting rods 15 are located between the electric translation table 2 and the hollow electric rotary table 7, the optical fiber positioner 16 is installed on the two long supporting rods 15, and height position adjustment is achieved through bolt installation;
as shown in fig. 3 and 4, the puncturing optical fiber 18 is horizontally clamped on the optical fiber holder 17, the puncturing head 18b of the puncturing optical fiber 18 passes through the horizontal through hole of the optical fiber positioner 16 and then extends to the vicinity of the agricultural product 31, and the optical fiber positioner 16 is used for keeping the puncturing optical fiber 18 horizontal and stable in the puncturing process; the other optical fiber connecting end 18a of the puncture optical fiber 18 is electrically connected with an external optical fiber spectrometer to output the collected spectral data, so that the analysis and the detection of the internal light distribution of the agricultural product 31 to be detected are facilitated. The distance and the position from the end part of the puncture optical fiber 18 to the agricultural product 31 to be measured on the hollow electric rotary table 7 are adjusted through the matching of the electric translation table 2 and the manual translation table 3.
As shown in fig. 5, the light source assembly 11 includes a halogen tungsten lamp 22, an L-shaped lamp holder 23, a flange 24, a light shielding plate 25, a light source base 26, a light source bracket 27, a stepping motor 28 and a lamp barrel 29; the bottom surface of the light source base 26 is provided with two parallel strip-shaped grooves, the strip-shaped grooves are parallel to the direction close to/far from the hollow electric turntable 7, the strip-shaped grooves of the light source base 26 are connected and installed on the light source supporting plate 8 through bolts, so that the light source base 26 moves and is adjusted on the light source supporting plate 8 along the direction close to/far from the hollow electric turntable 7, two sides of the middle of the light source base 26 are respectively fixed with an upward folded edge, and the upward folded edges are fixedly connected with a light source support 27, so that the light source base 26 and the light;
as shown in fig. 5 and 6, the halogen tungsten lamp 22 is mounted on the top of the light source support 27 on the side away from the hollow electric turntable 7 through the L-shaped lamp holder 23, and the mounting position of the halogen tungsten lamp 22 can be adjusted in the direction away from/close to the hollow electric turntable 7; a light through hole 27b is formed in the top of the light source support 27 and located on one side close to the hollow electric rotary table 7, and a lamp barrel 29 is installed at the light through hole 27 b; the center of the halogen tungsten lamp 22 and the axial lead of the lamp tube 29 are positioned on the same horizontal straight line, the halogen tungsten lamp 22 horizontally emits a light beam to the agricultural product 31 to be detected on the hollow electric turntable 7, and the light beam passes through the fan-shaped gap of the shading plate 25, the light through hole 27b and the lamp tube 29 and then irradiates the agricultural product 31 to be detected;
as shown in fig. 5 and 7, the stepping motor 28 is fixedly installed in the middle of the light source support 27, an output shaft end of the stepping motor 28 passes through a shaft hole 27f on the light source support 27 and then is coaxially connected with the light shielding plate 25 through the flange 24, the light shielding plate 25 is a disk with a fan-shaped notch, and the light shielding plate 25 is driven by the stepping motor 28 to rotate, so as to realize whether the light source generated by the halogen tungsten lamp 22 is shielded; the light source bracket 27 above the halogen tungsten lamp 22 is provided with a heat radiation fan 21a, and the side surface of the upper part of the light source bracket 27 is provided with a diffusion fan 21 b.
In specific implementation, the top of the light source support 27 extends to one side far away from the hollow electric rotary table 7 to form a horizontal plate, the horizontal plate is provided with a vent hole 27e, two parallel mounting grooves 27a are formed in two sides of the vent hole 27e, one side of the L-shaped light bracket 23 is embedded in the two parallel mounting grooves 27a of the boss of the light source support 27 through bolts, and the two parallel mounting grooves 27a are parallel to the direction near/far away from the hollow electric rotary table 7, so that the light bracket 23 can move and be adjusted along the two parallel mounting grooves 27 a.
The heat dissipation fan 21a is installed above the ventilation hole 27e of the boss of the light source bracket 27, a heat dissipation grid plate is installed on one side surface of the light source bracket 27, the scattering fan 21b is installed on the heat dissipation hole 27c on the other side surface, and two parallel height adjusting grooves 27d are respectively installed on two sides of the bottom of the light source bracket 27.
As shown in fig. 4, one end of the puncture optical fiber 18 is an optical fiber connection end 18a, the other end is a puncture head 18b wrapped by stainless steel, a hemispherical lens 18c with the same diameter as the end of the puncture head 18b is fixedly adhered to the end surface of the puncture head 18b through optical glue, and the hemispherical lens 18b can reduce puncture resistance and is beneficial to puncture detection; the outer peripheral face of the section where the puncture head 18b is located is provided with an external thread, an inner hole of the optical fiber holder 17 is provided with an internal thread, the puncture optical fiber 18 is sleeved in the inner hole of the optical fiber holder 17 through the matching of the internal thread and the external thread, the puncture optical fiber 18 is driven to horizontally move by rotating the puncture optical fiber 18, and then the distance between the end part of the puncture head 18b and the agricultural product 31 to be detected is finely adjusted.
The agricultural product 31 to be detected rotates through the electric turntable 5, so that different parts face the puncture head 18b of the puncture optical fiber 18, and detection of different position points is realized; meanwhile, the angle of the light source assembly 11 irradiating towards the puncture optical fiber 18 is adjusted through the rotation of the light source supporting plate 8 on the hollow electric rotary table 7 around the hollow electric rotary table 7, so that the internal light distribution detection of the agricultural product 31 to be detected at different illumination-detector angles is realized, and the internal light distribution detection of the agricultural product 31 to be detected at different illumination-detector angles and different detection positions is realized simultaneously.
The agricultural products 31 to be detected are honey pomelo, citrus, melon, onion and cabbage.
In an embodiment of the present invention, the multifunctional device for detecting internal light distribution and internal quality of agricultural products is adopted to detect agricultural products, and the method mainly includes the following steps:
step 6, controlling the hollow electric turntable 7 to enable the lamp cylinder 29 and the puncture optical fiber 18 to form a certain included angle, and repeating the step 5;
7, repeating the step 6, and sequentially collecting the spectral information surrounding the sample for one circle;
and 9, adjusting the mounting positions of the manual translation table 3 and the long support rod 15, adjusting the height of the manual lifting table 9, replacing the puncture point, and repeating the step 8 for collection. And acquiring internal light distribution spectrum data until the required puncture point position is obtained.
In the concrete implementation taking honey pomelo as an example, the puncture head of the puncture optical fiber 18 is 150mm, the diameter is 3mm, and a 3mm hemispherical lens is adhered to the end face of the puncture head through optical glue;
as shown in fig. 3, the electric translation stage 2 is reset to the far-end initial position, the hollow electric turntable 7 is rotated to make the included angle between the lamp barrel 29 and the puncture optical fiber 18 be 180 degrees, and the heights of the optical fiber holder 17 and the optical fiber positioner 16 are adjusted to make the puncture optical fiber 18 and the lamp barrel 29 coaxial; placing the honey pomelos in the fruit cup 10a, clamping and fixing the honey pomelos by the fruit cup 10b at the upper part, adjusting the height of the manual lifting platform 9 to enable the center position of the equatorial plane of the honey pomelos to be collinear with the puncture optical fiber 18, adjusting the fixing position of the collimating mirror U-shaped clamp 12 to enable the bottom surface of the fruit cup 10b to be parallel to the bottom surface of the fruit cup 10a, and enabling the fruit cup 10b to tightly press the honey pomelos; controlling the electric translation table 2 to move until the puncture optical fiber 18 is contacted with the honey pomelo peel, and recording position information; controlling the electric translation table 2 to puncture and enter 5mm of honey pomelos, performing spectrum acquisition operation, namely rotating the light shielding plate 25 to a light leakage position, acquiring puncture spectrum information and transmission spectrum information, adjusting spectrum acquisition integration time according to spectrum intensity, wherein the integration time is 500ms, and after the acquisition of the spectrum information is finished, restoring the light shielding plate 25 to the light shielding position to prevent strong light from burning the peel of the honey pomelos; the hollow electric turntable 7 is controlled to enable the lamp tube 29 to rotate clockwise and anticlockwise respectively, the rotation interval is 30 degrees, the rotation upper limit is 150 degrees, the spectrum collection operation is repeated once each rotation is carried out, and 11 pieces of spectrum data can be obtained until the collection is finished; controlling the hollow electric turntable 7 to rotate to reset the lamp tube 29, and continuously puncturing for 5mm to repeat the test process; the test can obtain the internal light distribution information of different wearing positions and different illumination angles, and meanwhile, if the honey pomelos are rotated towards the fruit calyx part upwards or the longitudinal axis is horizontally placed, the spectrum information of other parts can be detected. The spectrum information of the honey pomelos is detected in a large scale and modeling analysis is carried out, so that nondestructive testing of the internal quality of the honey pomelos can be realized.
The invention can adopt a puncture optical fiber detection method to detect the internal light distribution condition of the agricultural product, know the influence of the optical characteristics of the tissue of the agricultural product on the spectral detection stability, and simultaneously can acquire transmission spectral data for spectral nondestructive detection.
The invention discloses a multifunctional test bed for internal light distribution detection, optical characteristic detection and spectrum detection unit optimization of agricultural products, which utilizes an internal light distribution detection test of puncture optical fiber puncture detection, an optical characteristic test of rotation detection of a light source component, a transmission spectrum detection test of spectrum acquisition by a collimating mirror and the like.
The foregoing detailed description is intended to illustrate and not limit the invention, which is intended to be within the spirit and scope of the appended claims, and any changes and modifications that fall within the true spirit and scope of the invention are intended to be covered by the following claims.
Claims (4)
1. The utility model provides an inside light distribution of agricultural product and inside quality detect multi-functional device which characterized in that:
comprises an optical flat plate (1), and a light source system, a spectrum acquisition system and a puncture detection system which are arranged on the optical flat plate (1);
the light source system comprises a short supporting rod (6), a hollow electric rotary table (7), a light source supporting plate (8) and a light source assembly (11); a base (7a) of the hollow electric turntable (7) is fixedly arranged on the optical flat plate (1) through four short supporting rods (6), a light source supporting plate (8) is horizontally arranged, one side part of the light source supporting plate (8) is arranged on a rotating platform (7b) of the hollow electric turntable (7) and is driven by the hollow electric turntable (7) to rotate around the center, a light source component (11) can be arranged on the other side part of the light source supporting plate (8) along the direction close to/far from the hollow electric turntable (7), and the light source component (11) rotates around the center of the hollow electric turntable (7) under the driving of the hollow electric turntable (7) along with the light source supporting plate (8);
the spectrum acquisition system comprises a support column (4), an electric rotary table (5), a manual lifting table (9), fruit cups (10a and 10b), a collimating mirror U-shaped clamp (12), a collimating mirror flange (13), a collimating mirror (14) and a positioning rod (20); the electric turntable (5) is fixed on the optical flat plate (1) and arranged below the hollow electric turntable (7), the output shaft of the electric turntable (5) faces upwards and is coaxially connected with the lower end of the support column (4), the upper end of the support column (4) penetrates through a middle through hole of the hollow electric turntable (7) and then is fixedly connected with the bottom of the manual lifting table (9), the fruit cup (10a) is installed on the manual lifting table (9), and the electric turntable (5), the support column (4), the lower fruit cup (10a) and the hollow electric turntable (7) are arranged with a vertical coaxial line; the positioning rod (20) is vertically arranged, the bottom end of the positioning rod is fixed on the optical flat plate (1) and is positioned on the side of the hollow electric turntable (7); the bottom of an agricultural product (31) to be tested is placed in the lower fruit cup (10a), the upper fruit cup (10b) covers the top of the agricultural product (31) to be tested, so that the agricultural product (31) to be tested is clamped between the upper fruit cup (10b) and the lower fruit cup (10a), and the upper fruit cup (10b) and the lower fruit cup (10a) are arranged coaxially up and down; a collimating mirror flange (13) is fixed on the upper fruit cup (10b), one end of a collimating mirror U-shaped holder (12) is fixed on the positioning rod (20) through an external locking positioner (30) and is lifted up and down along the positioning rod (20) to adjust the height, the other end of the collimating mirror U-shaped holder (12) is arranged into a U-shaped structure, the U-shaped structure is connected to the collimating mirror flange (13), and the collimating mirror flange (13) and the upper fruit cup (10b) are pressed to be attached to an agricultural product (31) to be measured; the collimating lens (14) is arranged in the inner cylinder wall of the collimating lens flange (13), and the output end of the collimating lens (14) is electrically connected with an external optical fiber spectrometer;
the puncture detection system comprises an electric translation table (2), a manual translation table (3), a long support rod (15), an optical fiber positioner (16), an optical fiber holder (17), a puncture optical fiber (18) and an optical fiber positioning plate (19); the electric translation table (2) is fixed on the optical flat plate (1), the horizontal central axis of the electric translation table (2) is coplanar with the vertical axis of the hollow electric turntable (7) of the light source system, the manual translation table (3) is installed on the moving platform of the electric translation table (2), the moving direction of the manual translation table (3) is perpendicular to the moving direction of the electric translation table (2), and the optical fiber positioning plate (19) is fixed on the moving platform of the manual translation table (3); the optical fiber holder (17) is embedded in two vertical parallel mounting grooves on the optical fiber positioning plate (19) and vertically ascends and descends along the mounting grooves to adjust the mounting height; the two long supporting rods (15) are vertically arranged, the bottom ends of the two long supporting rods are fixed on the optical flat plate (1), the two long supporting rods (15) are positioned between the electric translation table (2) and the hollow electric turntable (7), and the optical fiber positioner (16) is arranged on the two long supporting rods (15); the puncture optical fiber (18) is horizontally clamped on the optical fiber holder (17), and a puncture head (18b) of the puncture optical fiber (18) passes through a horizontal through hole of the optical fiber positioner (16) and then extends to the position near an agricultural product (31); the other optical fiber connecting end (18a) of the puncture optical fiber (18) is electrically connected with an external optical fiber spectrometer;
puncture optic fibre (18) one end be optical fiber link end (18a), the other end is puncture head (18b) that the stainless steel wrapped up in, puncture head (18b) terminal surface is fixed to paste through optical cement has hemisphere lens (18c) that equals with puncture head (18b) tip diameter, the outer peripheral face of puncture head (18b) place section is equipped with the external screw thread, optic fibre holder (17) hole is equipped with the internal thread, puncture optic fibre (18) are through the suit of interior external screw thread fit in optic fibre holder (17) hole.
2. The multifunctional device for internal light distribution and internal quality detection of agricultural products of claim 1, wherein:
the light source assembly (11) comprises a halogen tungsten lamp (22), an L-shaped lamp holder (23), a flange (24), a shading plate (25), a light source base (26), a light source bracket (27), a stepping motor (28) and a lamp barrel (29); the bottom surface of the light source base (26) is provided with two parallel strip-shaped grooves, the strip-shaped grooves of the light source base (26) are connected and installed on the light source supporting plate (8) through bolts, so that the light source base (26) can move and be adjusted on the light source supporting plate (8) along the direction close to/away from the hollow electric turntable (7), two sides of the middle of the light source base (26) are respectively fixed with an upward folded edge, and the upward folded edges are fixedly connected with a light source support (27); the halogen tungsten lamp (22) is arranged on one side, away from the hollow electric rotary table (7), of the top of the light source support (27) through an L-shaped lamp support (23), and the installation position of the halogen tungsten lamp (22) can be adjusted along the direction away from/close to the hollow electric rotary table (7); a light through hole (27b) is formed in one side, close to the hollow electric rotary table (7), of the top of the light source support (27), and a lamp barrel (29) is installed at the light through hole (27 b); the center of the halogen tungsten lamp (22) and the axial lead of the lamp barrel (29) are positioned on the same horizontal straight line, the halogen tungsten lamp (22) horizontally emits a light beam to an agricultural product (31) to be detected on the hollow electric turntable (7), and the light beam penetrates through the light through hole (27b) and the lamp barrel (29) and then irradiates the agricultural product (31) to be detected; the stepping motor (28) is fixedly installed in the middle of the light source support (27), the output shaft end of the stepping motor (28) penetrates through a shaft hole (27f) in the light source support (27) and then is coaxially connected with the light shielding plate (25) through a flange (24), the light shielding plate (25) is a disc with a fan-shaped notch, and the light shielding plate (25) is driven by the stepping motor (28) to rotate so as to realize whether the light source generated by the halogen tungsten lamp (22) is shielded or not; a heat radiation fan (21a) is arranged on a light source bracket (27) above the halogen tungsten lamp (22), and a scattering fan (21b) is arranged on the side surface of the upper part of the light source bracket (27).
3. The multifunctional device for internal light distribution and internal quality detection of agricultural products of claim 1, wherein: the agricultural product (31) to be detected rotates through the electric rotary table (5) to enable different parts to face the puncture head (18b) of the puncture optical fiber (18), and detection of different position points is achieved; meanwhile, the angle of the light source assembly (11) irradiating towards the puncture optical fiber (18) is adjusted through the rotation of the light source supporting plate (8) on the hollow electric rotary table (7) around the hollow electric rotary table (7), so that the internal light distribution detection of the agricultural product (31) to be detected at different illumination-detector angles is realized.
4. The multifunctional device for internal light distribution and internal quality detection of agricultural products of claim 1, wherein: the agricultural products (31) to be detected are honey pomelos, oranges, melons, onions and cabbages.
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| CN1040436A (en) * | 1989-09-15 | 1990-03-14 | 王光辉 | Fatness measuring instrument of live pigs |
| CA2179338C (en) * | 1995-08-07 | 2000-04-25 | Gordon Albert Thomas | Apparatus and method for spectroscopic product recognition and identification |
| AU766245B2 (en) * | 1999-09-24 | 2003-10-09 | Kabushiki Kaisha Kajitsu Hihakai Hinshitsu Kenkyujo | Two side multiple lamp online inner part inspection apparatus |
| US6536975B1 (en) * | 2000-11-10 | 2003-03-25 | Mediflex Hospital Products, Inc. | Liquid applicator with opposed wings |
| JP4288325B2 (en) * | 2002-11-25 | 2009-07-01 | 谷電機工業株式会社 | Defect inspection method by image recognition |
| CN1700883A (en) * | 2003-06-12 | 2005-11-23 | 松下电器产业株式会社 | Device and method of measuring living-body information |
| JP4665899B2 (en) * | 2004-05-10 | 2011-04-06 | 静岡シブヤ精機株式会社 | Online internal quality inspection method and equipment |
| JP2010511463A (en) * | 2006-12-06 | 2010-04-15 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Method for obtaining optical properties of tissue |
| FR2916850B1 (en) * | 2007-06-01 | 2013-02-01 | Force A | PLANT VEGETABLE ANALYSIS APPARATUS, METHOD FOR MONITORING OR CARTOGRAPHY OF CONDITION OR EVOLUTION OF CULTURE, AND METHOD FOR MANAGING PLANT TREATMENT |
| JP5952327B2 (en) * | 2013-03-22 | 2016-07-13 | 富士フイルム株式会社 | Photoacoustic measuring device and puncture needle |
| JP6282086B2 (en) * | 2013-08-20 | 2018-02-21 | 三井金属計測機工株式会社 | Evaluation apparatus for bulb vegetables and evaluation method for bulb vegetables |
| CN104569154B (en) * | 2015-01-04 | 2017-06-13 | 浙江大学 | The detection method and device of quick nondestructive fruit quality |
| CN206330878U (en) * | 2016-10-03 | 2017-07-14 | 石河子大学 | Optical fiber probe insertion depth is adjusted and cleaning device |
| CN108195825A (en) * | 2017-12-15 | 2018-06-22 | 上海巴安水务股份有限公司 | A kind of hazardous waste detecting system based on laser induced breakdown spectroscopy |
| CN108088812B (en) * | 2018-01-16 | 2021-07-27 | 西南大学 | Visible near-infrared transmission spectrum measuring device |
| CN109187544B (en) * | 2018-10-26 | 2024-01-23 | 温州大学 | Device and method for rapidly and nondestructively detecting fruit quality |
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