CN220019381U - Near infrared detection device for fruit quality - Google Patents
Near infrared detection device for fruit quality Download PDFInfo
- Publication number
- CN220019381U CN220019381U CN202320902529.7U CN202320902529U CN220019381U CN 220019381 U CN220019381 U CN 220019381U CN 202320902529 U CN202320902529 U CN 202320902529U CN 220019381 U CN220019381 U CN 220019381U
- Authority
- CN
- China
- Prior art keywords
- near infrared
- infrared
- detection device
- detection
- fruit quality
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 110
- 235000013399 edible fruits Nutrition 0.000 title claims abstract description 30
- 239000002356 single layer Substances 0.000 claims description 10
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- 239000012780 transparent material Substances 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 abstract description 36
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 241000220225 Malus Species 0.000 description 5
- 238000007405 data analysis Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 238000002329 infrared spectrum Methods 0.000 description 4
- 238000010223 real-time analysis Methods 0.000 description 4
- 238000011897 real-time detection Methods 0.000 description 4
- 235000021016 apples Nutrition 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 244000144730 Amygdalus persica Species 0.000 description 1
- 241000167854 Bourreria succulenta Species 0.000 description 1
- 235000006040 Prunus persica var persica Nutrition 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 235000019693 cherries Nutrition 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000005911 diet Nutrition 0.000 description 1
- 230000037213 diet Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002381 microspectrum Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000021018 plums Nutrition 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a fruit quality near-infrared detection device which comprises a shell, a light shield, an objective table, a plurality of light sources, a near-infrared spectrometer and a power supply, wherein the near-infrared spectrometer is positioned in the shell, the objective table is positioned above the near-infrared spectrometer, the objective table comprises a plurality of light path channels and a near-infrared detection channel, the light sources are arranged in the light path channels, the detection end of the near-infrared spectrometer is positioned in the near-infrared detection channel, the light shield can be connected onto the shell in a covering mode and is positioned above the objective table, and the light sources and the near-infrared spectrometer are connected with the power supply. The utility model has the beneficial effects that: the superposition of the diffuse reflection and diffuse transmission detection modes is realized, so that the double effects of expanding the detection range and enhancing the spectrum signal are realized.
Description
Technical Field
The utility model relates to the technical field of detection, in particular to an infrared detection device.
Background
Along with the increasing promotion of the quality of life of people, the attention to the quality of diet is gradually strengthened, and the near infrared nondestructive detection technology of fruits is also more and more concerned. The traditional near infrared nondestructive detection technology brings convenience to people, but limits the use scenes of people due to the factors of complex operation, heavy instruments and the like, and is gradually replaced by the portable near infrared detection technology in the field of fruit detection. The portable near infrared spectrometer in the market at the present stage mainly takes the miniaturization and online development trend, and takes the diffuse reflection detection mode as the main mode aiming at fruits with thinner peel such as apples.
Most of the portable fruit detection devices at home and abroad are mainly divided into strong light single-point reflection type and diffuse reflection objective table type.
The strong light single-point reflection type optical fiber spectrum sensor has the advantages that the strong light single-point reflection type optical fiber spectrum sensor can obtain high-strength and high-signal-to-noise ratio spectrum signals, but only can detect the component information of a certain point or a certain area of a sample, and the detection result is not representative; and because the distance between the light source and the detector is relatively short, the quality and accuracy of the spectrum signal can be seriously affected by diffuse reflection light which does not carry effective spectrum information.
The diffuse reflection objective table is formed by dispersing and integrating near infrared light sources around a near infrared detector, and light emitted by the near infrared light sources is subjected to diffuse reflection, so that more effective spectrum information in fruits can be detected by the detector, and the representativeness of detection results is stronger, therefore, the structure is accepted and used by people. He also suffers from the disadvantage that the spectral signal is weak due to the non-concentration of the beam and there is no good solution at all.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information has been made as prior art that is well known to a person of ordinary skill in the art.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: how to solve the problem that the detection range and the enhancement of the spectrum signal can not be considered at present.
The utility model solves the technical problems by the following technical means:
fruit quality near-infrared detection device, including casing, lens hood, objective table, a plurality of light source, near-infrared spectrometer that can go up and down, near-infrared spectrometer is located in the casing, the objective table is located near-infrared spectrometer top, the objective table includes a plurality of light path passageway and near-infrared detection passageway, the light source is built-in the light path passageway, near-infrared spectrometer's detection end is located near-infrared detection passageway, the lens hood can be covered and connect on the casing and be located the objective table top, the light source near-infrared spectrometer all is connected with the power.
In the utility model, the shell is connected with the light shield to form a detection space, and the light shield can prevent the influence of external illumination on a detection result; the light source is positioned in the light path channel, the detection end of the near infrared spectrometer is positioned in the near infrared detection channel, the object to be detected is arranged on the object stage, and the light emitted by the light sources can play a role in optical enhancement in the near infrared spectrum detection process. The utility model can optically enhance the existing diffuse reflection detection by adding the external light source, and can also be matched with the diffuse reflection light shield to realize the superposition of diffuse reflection and diffuse transmission detection modes, thereby realizing the double effects of expanding the detection range and enhancing the spectrum signal.
Preferably, the infrared spectrometer is connected with the microcomputer, the microcomputer is connected with the touch display screen, the touch display screen is connected to the shell, the microcomputer is placed in the shell, and the display and control assembly is connected with the power supply.
The microcomputer is controlled through the touch display screen, the near infrared spectrometer is further controlled to conduct spectrum detection and spectrum data analysis, and detected spectrum data are finally obtained through real-time detection and analysis of the spectrum data.
Preferably, the infrared spectrometer further comprises a lifting assembly, wherein the lifting assembly comprises a lifting plate and lifting equipment, the bottom of the near infrared spectrometer is connected with the lifting plate, and the lifting plate is connected with the lifting equipment.
The lifting assembly is arranged in the shell, and the lifting device can drive the near infrared spectrometer to move, so that the optimal detection distance is found, and the spectrum detection result is optimized.
Preferably, the objective table is made of transparent materials.
Preferably, the object stage comprises one single object carrying layer or more than two single object carrying layers stacked, and the near infrared detection channel in the middle of each single object carrying layer is different in size.
The middle opening of the carrying monolayer is a near infrared detection channel, and according to different objects to be detected, different fruits can be tested by using a single carrying monolayer or overlapping more than two carrying monolayers.
Preferably, the light path channels are arranged in a circumferential array along the near infrared detection channel.
Preferably, the inside of the light shield is a circular arc cavity, and the circular arc cavity and the shell form a closed detection space after being connected.
The circular arc structure gathers the infrared light emitted by the light source to the greatest extent in a reflection mode to the center position of the diffuse reflection shade, namely the position where the object to be detected is placed, so that the utilization efficiency of infrared spectrum is enhanced, and the spectrum result is optimized.
Preferably, the light source is a halogen tungsten bulb, and the light source and the spectrometer are respectively connected with independent power supplies.
Preferably, the light path channel is one or a combination of a cylindrical hole, a square hole and a regular polygon hole.
Preferably, the shell is of a square box-shaped structure, and the upper part of the shell is an open end; the light shield is cuboid, and the handle is connected at the top.
The utility model has the advantages that:
(1) In the utility model, the shell is connected with the light shield to form a detection space, and the light shield can prevent the influence of external illumination on a detection result; the light source is positioned in the light path channel, the detection end of the near infrared spectrometer is positioned in the near infrared detection channel, the object to be detected is arranged on the object stage, and the light emitted by the light sources can play a role in optical enhancement in the near infrared spectrum detection process. The utility model adds an external light source to optically enhance the existing diffuse reflection detection, and can be matched with a diffuse reflection light shield to realize the superposition of diffuse reflection and diffuse transmission detection modes, thereby realizing the dual effects of expanding the detection range and enhancing the spectrum signal;
(2) The microcomputer is controlled through the touch display screen, the near infrared spectrometer is further controlled to conduct spectrum detection and spectrum data analysis, and detected spectrum data are finally obtained through real-time detection and analysis of the spectrum data;
(3) The lifting assembly is arranged in the shell, and the lifting device can drive the near infrared spectrometer to move, so that the optimal detection distance is found, and the spectrum detection result is optimized;
(4) The middle opening of the carrying monolayer is a near infrared detection channel, and according to different objects to be detected, different fruits can be tested by using a single carrying monolayer or overlapping more than two carrying monolayers;
(5) The fruit detection device integrates basic components of fruit detection, does not need to be connected with external equipment during detection, has strong independence and is convenient to carry and use.
Drawings
Fig. 1 is a schematic structural diagram of a near infrared detection device for fruit quality according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a near-infrared detection device (excluding a shade) for fruit quality according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a lifting assembly according to an embodiment of the present utility model;
FIG. 4 is a schematic view of a mask according to an embodiment of the present utility model;
fig. 5 is a schematic diagram of the working principle of the near infrared detection device for fruit quality according to the embodiment of the utility model;
reference numerals in the drawings:
1. a housing; 2. a light shield; 3. an objective table; 31. an optical path channel; 32. a near infrared detection channel; 4. a light source; 5. a near infrared spectrometer; 6. touching the display screen; 7. a lifting assembly; 71. a lifting plate; 72. lifting equipment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment one:
as shown in fig. 1-4, the fruit quality near-infrared detection device comprises a shell 1, a light shield 2, an objective table 3, a plurality of light sources 4, a near-infrared spectrometer 5, a power supply (not shown in the figures) and a display and control assembly; the display and control assembly comprises a microcomputer (not shown), a touch display screen 6 and a lifting assembly 7. The light source 4, the near infrared spectrometer 5 and the display and control assembly are all connected with a power supply; wherein the light source 4 and the near infrared spectrometer 5 adopt independent power supplies, as shown in fig. 2, a power button is arranged on the side surface of the bottom of the shell 1.
The casing 1 has a substantially square structure, the upper part of the casing 1 is an open end, and the light shield 2 and the upper part of the casing 1 are covered and connected to form a closed detection space. As shown in fig. 4, the light shielding cover 2 is a substantially rectangular parallelepiped, and has a circular arc cavity therein, the top of which is connected with a handle, and the circular arc cavity is connected with the housing 1 to form a closed detection space.
The circular arc design of the light shield 2 refers to the principle of an integrating sphere. The circular arc design can collect infrared light emitted by the light source to the center position of the diffuse reflection shade, which is the position where the object to be detected is placed, in a reflection mode to the greatest extent, so that the utilization efficiency of infrared spectrum is enhanced, and the spectrum result is optimized.
The light shield 2 is made of polytetrafluoroethylene materials, and is arranged above the object stage 3 and the object to be detected during detection, so that external illumination is isolated, a closed detection environment is provided, and the influence of the external illumination on a detection result is prevented.
The near infrared spectrometer 5 is located in the housing 1, the stage 3 is located above the near infrared spectrometer 5, specifically, the near infrared spectrometer 5 may be fixed in the housing 1 by a bolt, and the periphery of the stage 3 is connected with the interior of the housing 1 by means of clamping, bolting, and the like.
The objective table 3 is made of a transparent acrylic plate, has good light guiding performance, and comprises a plurality of light path channels 31 and near infrared detection channels 32, the light source 4 is arranged in the light path channels 31, and the detection end of the near infrared spectrometer 5 is arranged in the near infrared detection channels 32. The number of the light path channels 31 is four, the four light sources are arranged along the circumference of the near infrared detection channel 32 in an array manner, and the arrangement of the four light sources forms a circumferential luminous point so as to realize optical enhancement. The optical path channel 31 and the near infrared detection channel 32 are cylindrical holes, and of course, square or regular polygon holes can be adaptively changed. The near infrared detection channel 32 provides a closed detection environment and a lifting channel for the detection module, and performs conventional diffuse reflection detection on the object to be detected.
The light source 4 is a halogen tungsten bulb, and the halogen tungsten bulb optically enhances the traditional diffuse reflection detection on one hand; on the other hand, diffuse transmission detection of the object to be detected is realized by matching with the light shield 2.
The near infrared spectrometer 5 is a micro-spectrum detection device integrated on a microcomputer, in which a near infrared light source, a spectroscopic element and a detector are built. And the detector and the light source 4 are arranged on the same side of the object to be detected, and can only be used for diffuse reflection detection. The embodiment is not specifically set, and only needs to be adopted in the prior art.
The display and control assembly comprises a microcomputer and a touch display screen 6, the near infrared spectrometer 5 is connected with the microcomputer, the microcomputer is connected with the touch display screen 6, the touch display screen 6 is connected to the shell 1, the microcomputer is placed in the shell 1, and the display and control assembly is connected with a power supply. The microcomputer is controlled by the touch display screen 6, the near infrared spectrometer 5 is further controlled to perform spectrum detection and spectrum data analysis, and detected spectrum data is finally obtained by real-time detection and analysis of the spectrum data.
As shown in fig. 3, the lifting assembly 7 includes a lifting plate 71 and a lifting device 72, the bottom of the near infrared spectrometer 5 is connected to the lifting plate 71, and the lifting plate 71 is connected to the lifting device 72. The lifting assembly 7 is arranged in the shell 1, and the lifting device 72 can drive the near infrared spectrometer 5 to move up and down, so that the optimal detection distance is found, and the spectrum detection result is optimized.
The lifting device 72 may be composed of a guide rail, a screw nut, or a gear and a rack. If the knob is arranged in the embodiment, one end of the knob is provided with a gear shaft, the gear shaft is meshed with the rack, the rack is connected with the lifting plate 71, lifting of the lifting plate 71 can be realized by rotating the knob, and scales can be arranged on the outer side of the shell 1 for marking the height. Only one embodiment is given here, as long as lifting and lowering can be achieved.
The working procedure in this embodiment is:
as shown in fig. 5, taking an apple as an example, when the apple needs to be detected, firstly, a power switch of the near infrared spectrometer 5 is turned on, a whiteboard is placed on a detection channel on the objective table 3, the mask 2 is covered, the scale of the lifting assembly 7 is zeroed, and detection of a background spectrum is performed. Then, putting the apples to be tested on the object stage 3, starting a power switch for controlling the halogen tungsten lamp, and collecting spectrum data; then slowly rotating the knob of the lifting assembly 7, and repeatedly detecting every 1mm until the spectrum signal with the highest quality is found. The microcomputer is controlled by the touch display screen 6, so that the spectrometer is controlled to perform spectrum detection and spectrum data analysis, and detected spectrum data is finally obtained by real-time detection and analysis of the spectrum data.
In the embodiment, the shell 1 and the light shield 2 are connected to form a closed detection space, and the light shield 2 can be matched with an external light source 4 for optical enhancement to realize superposition of diffuse reflection and diffuse transmission detection modes; by adding the four external light sources 4, the optical path design surrounded by the external light sources 4 not only can carry out optical enhancement on the existing diffuse reflection detection, but also can be matched with the light shield 2 to realize the superposition of diffuse reflection and diffuse transmission detection modes, thereby taking into account the dual advantages of the detection range and the enhancement of spectrum signals. The near infrared spectrometer 5 is driven to move by the free adjustment detection lifting assembly 7, so that the optimal detection distance is found, and the spectrum detection result is optimized.
Embodiment two:
as shown in fig. 2, the stage 3 is made of transparent material, and the stage 3 includes one single carrier layer or two or more single carrier layers stacked, and the near infrared detection channels 32 in the middle of each single carrier layer are different in size.
The central opening of the carrier monolayer is the near infrared detection channel 32, and according to the different objects to be detected, the carrier monolayer can be used for testing different fruits by using a single carrier monolayer or overlapping more than two carrier monolayers.
If the middle near infrared detection channel 32 of the lower carrier monolayer is smaller, smaller fruits such as plums, cherries, etc. can be tested; when fruits with larger sizes such as apples and peaches need to be tested, two carrier monolayers can be stacked, and the near infrared detection channel 32 in the middle of the carrier monolayer on the upper layer is larger.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. Fruit quality near-infrared detection device, its characterized in that includes casing, lens hood, objective table, a plurality of light source, near-infrared spectrometer, power, the near-infrared spectrometer is located in the casing, the objective table is located near-infrared spectrometer top, the objective table includes a plurality of light path passageway and near-infrared detection passageway, the light source is built-in the light path passageway, near-infrared spectrometer's detection end is located near-infrared detection passageway, the lens hood can be covered and connect on the casing and be located the objective table top, the light source near-infrared spectrometer all is connected with the power.
2. The near infrared fruit quality detection device of claim 1, further comprising a display and control assembly, wherein the display and control assembly comprises a microcomputer and a touch display screen, the near infrared spectrometer is connected with the microcomputer, the microcomputer is connected with the touch display screen, the touch display screen is connected to the shell, the microcomputer is placed in the shell, and the display and control assembly is connected with a power supply.
3. The near infrared fruit quality detection device of claim 1, further comprising a lifting assembly comprising a lifting plate and a lifting apparatus, wherein the lifting plate is connected to the bottom of the near infrared spectrometer, and wherein the lifting plate is connected to the lifting apparatus.
4. The near infrared fruit quality detection device of claim 1, wherein the stage is made of a transparent material.
5. The near infrared fruit quality detection device of claim 1, wherein the stage comprises one carrier monolayer or a superposition of more than two carrier monolayers, each of which has a different size of near infrared detection channel in the middle.
6. The near infrared fruit quality detection device of claim 1, wherein the light path channels are arranged in a circumferential array along the near infrared detection channels.
7. The near infrared fruit quality detection device according to claim 1, wherein the light shield is internally provided with a circular arc-shaped cavity, and the circular arc-shaped cavity and the shell form a closed detection space after being connected.
8. The near infrared fruit quality detection device of claim 1, wherein the light source is a halogen tungsten bulb, and the light source and the spectrometer are respectively connected with independent power supplies.
9. The near infrared fruit quality detection device of claim 1, wherein the light path channel is one or a combination of a cylindrical hole, a square hole and a regular polygon hole.
10. The near infrared fruit quality detection device of claim 1, wherein the housing has a square box-like structure, and an upper portion of the housing has an open end; the light shield is cuboid, and the handle is connected at the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320902529.7U CN220019381U (en) | 2023-04-18 | 2023-04-18 | Near infrared detection device for fruit quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320902529.7U CN220019381U (en) | 2023-04-18 | 2023-04-18 | Near infrared detection device for fruit quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220019381U true CN220019381U (en) | 2023-11-14 |
Family
ID=88686904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320902529.7U Active CN220019381U (en) | 2023-04-18 | 2023-04-18 | Near infrared detection device for fruit quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220019381U (en) |
-
2023
- 2023-04-18 CN CN202320902529.7U patent/CN220019381U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5377000A (en) | Portable appearance measuring apparatus | |
| JP6395981B1 (en) | Light source integrated lens assembly and spectroscopic analysis apparatus including the same | |
| CN207423810U (en) | A kind of laser induced breakdown spectrograph for Multi-example detection | |
| CN101799401B (en) | Handheld near-infrared probe for nondestructive internal quality testing of fruit and detection method | |
| CN103472011A (en) | Portable fruit internal-quality detection device using optical detector | |
| CN105181611A (en) | Nondestructive testing device for hyperspectral transmission imaging of sphere-like fruits | |
| CN104990902A (en) | Plant chlorophyll fluorescence detection device based on LED | |
| CN220019381U (en) | Near infrared detection device for fruit quality | |
| CN109085125A (en) | A kind of the inside quality non-destructive testing device and method of fruit | |
| CN106248590A (en) | A kind of portable non-destructive detecting device of fruit and vegerable and detection method thereof | |
| CN205049472U (en) | Spherical fruit of class transmission hyperspectral imager nondestructive test device | |
| CN107153000B (en) | Portable filter optical performance detection device and detection method thereof | |
| CN209640219U (en) | A kind of simple spectroscopic detector | |
| CN112775022A (en) | Small-size fruit inside quality intelligence classification equipment | |
| CN217156254U (en) | Eight passageway full register for easy reference food safety analysis appearance of rotation type | |
| CN104897574A (en) | Integrated optical portable detector for agricultural and livestock products | |
| CN210664766U (en) | Single-light-source multi-detection-module photometer | |
| CN205080046U (en) | Detect with infrared survey oil appearance | |
| CN220709166U (en) | Full-automatic enzyme-labeled analyzer with screen display function | |
| CN208872661U (en) | A kind of plant leaf chlorophyll content detection device based on three wavelength | |
| CN209656559U (en) | A kind of near-infrared fruit internal quality non-destructive testing is coupled to receive device with optical fiber | |
| CN113252628A (en) | Fluorescence spectrum water quality monitoring device and monitoring method thereof | |
| CN212111100U (en) | Enhanced Raman spectrum detection device for aerosol | |
| CN214703322U (en) | Hand-held type oranges and tangerines quality nondestructive test appearance | |
| CN207439926U (en) | A kind of spectrophotometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |