Corn quality nondestructive testing device based on near infrared spectrum technology

Abstract

The utility model relates to the technical field of corn quality detection, and particularly discloses a corn quality nondestructive detection device based on a near infrared spectrum technology, which comprises a workbench and a plurality of supporting legs mounted at the bottom of the workbench, and further comprises a detection protection mechanism and a detector for protecting the detector, the detection protection mechanism is located above the workbench, the detection protection mechanism comprises a supporting vertical plate installed above the workbench, and one end of the supporting vertical plate is fixedly connected with an installation plate; through the effect of the uniform placement mechanism and the effect of the detection port, corn samples can be quickly located in the detection port by stirring the corn samples, so that the corn samples are uniformly placed in the placement groove, and compared with the effect that the interior of a sample disc is smooth, the corn samples can be uniformly spread by workers, and the working efficiency is improved. And correspondingly, the working efficiency of detecting and using the corn by a worker is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of corn quality detection, and in particular relates to a nondestructive detection device for corn quality based on near-infrared spectroscopy technology. Background Art

[0002] Corn is one of the most widely distributed food crops in the world. Automated corn grading is an important way to increase its value. Machine vision technology has the advantages of being real-time, objective, and non-destructive, making it suitable for grading corn based on size, shape, color, defects, etc.

[0003] Corn breeding and quality screening require accurate and fast analytical technology. The current corn nutrient component testing generally adopts conventional laboratory chemical analysis methods, which is very inconvenient in experimental work. Advanced testing instruments can not only analyze samples in a short time, but also do not destroy the samples. The tested samples can also be used for planting, which will help to accelerate the process of corn quality breeding.

[0004] In the Chinese patent publication number CN205120574U, a spectral detection device for corn quality is mentioned, which includes a computer, a single-chip microcomputer module, a multi-spectral acquisition and processing module, an image sensor, a stepper motor, a filter wheel, a light source, a collection box, a halogen bulb and a sample tray; the image sensor is installed at the top center of the collection box, the stepper motor is installed at the top of the collection box, the rotating shaft of the stepper motor extends into the collection box, the filter wheel is fixed on the rotating shaft, and a plurality of countersunk holes are evenly opened on the filter wheel along its circumference, and filters are installed in the countersunk holes; the sample tray is fixed at the bottom center of the collection box; the single-chip microcomputer module and the multi-spectral acquisition and processing module are electrically connected to the computer, the single-chip microcomputer module is electrically connected to the photoelectric sensor, the stepper motor, the light source and the halogen bulb, and the multi-spectral acquisition and processing module is electrically connected to the image sensor; the spectral detection device for corn quality judges corn quality by multi-spectral imaging images with high accuracy;

[0005] Compared with the above documents, in the above documents, although multi-spectral imaging images are used to judge the quality of corn with high accuracy, in the use of existing spectral detectors, corn samples are generally poured into a sample tray manually, and the sample tray is placed under the spectral detector for detection. If the corn is unevenly placed, the detection effect of the corn will be reduced. Since the interior of the existing sample tray is smooth, it is not conducive to the staff to spread the corn evenly, which correspondingly reduces the work efficiency of the staff in using corn for detection. For this reason, a non-destructive detection device for corn quality based on near-infrared spectroscopy technology is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a nondestructive detection device for corn quality based on near-infrared spectroscopy technology to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A corn quality nondestructive testing device based on near-infrared spectroscopy technology includes a workbench and a plurality of supporting legs installed at the bottom thereof, and also includes:

[0009] A detection and protection mechanism and a detector are used to protect the detector, wherein the detection and protection mechanism is located above the workbench, and the detection and protection mechanism includes a support vertical plate installed above the workbench, one end of the support vertical plate is fixedly connected to the mounting plate, the bottom of the mounting plate is fixedly connected to the protective sleeve, one side of the outer wall of the protective sleeve is connected to a first connecting rope, the end of the first connecting rope away from the protective sleeve is connected to a first plug plate, the interior of the protective sleeve is slidably connected to a limiting slide, the bottom of the limiting slide is fixedly connected to a connecting plate, and one side of the inner wall of the protective sleeve is connected to the limiting plate;

[0010] A uniform placement mechanism is used to uniformly place the corn samples to be tested. The uniform placement mechanism is located on a workbench and includes a placement slot on the top of the workbench. A plurality of testing ports are provided inside the placement slot. The bottom of the workbench is located below the placement slot and is connected to a collection box. A second connecting rope is connected to one side of the outer wall of the collection box, and a second plug plate is connected to the end of the second connecting rope away from the collection box.

[0011] Preferably, the detector is mounted on the bottom end of the connecting plate, and the outer side wall of the limiting slide plate and the inner side wall of the protective sleeve are slidingly fitted.

[0012] Preferably, a first sliding groove is provided on the protective sleeve, and the first plugging plate is slidably plugged into the protective sleeve through the first sliding groove.

[0013] Preferably, one side of the detector does not contact the limiting plate.

[0014] Preferably, the detection port is connected to the interior of the collection box, a second slide groove is provided on the collection box, the second plug plate is slidably plugged into the collection box through the second slide groove, and the top of the second plug plate and the bottom of the detection port are slidably fitted.

[0015] Preferably, the bottom of the inner wall of the collection box is inclined, and a discharge port is provided at the bottom of one side of the collection box, and the placement slot and the detector are correspondingly arranged.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] Through the action of the uniform placement mechanism and the function of the detection port, the corn sample can be quickly positioned inside the detection port by moving it, so that the corn sample is evenly placed in the placement slot. Compared with the smooth setting of the interior of the sample tray, it is beneficial for the staff to spread the corn sample evenly, and accordingly improves the work efficiency of the staff in testing corn.

[0018] Through the function of the detection protection mechanism, after the detection work is completed, the detector can be stably protected inside the protective sleeve to prevent it from being affected by external dust adhesion, which may cause inaccurate detection accuracy of the detector, thereby improving the detection efficiency of the detector for corn samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a top view of the structure of the utility model;

[0021] Figure 3 This is a side bottom structure diagram of the utility model;

[0022] Figure 4 This is a side sectional structural diagram of the utility model;

[0023] Figure 5 This is a front sectional structural diagram of the collection box of the utility model;

[0024] Figure 6 This is a flow chart of the steps of detection by the detector of the utility model.

[0025] In the figure: 1. Workbench; 2. Support leg; 3. Support vertical plate; 301. Mounting plate; 302. Protective sleeve; 303. First connecting rope; 304. First plug-in plate; 305. Limiting slide; 306. Connecting plate; 307. Detector; 308. Limiting plate; 4. Placement slot; 401. Detection port; 402. Collection box; 403. Second connecting rope; 404. Second plug-in plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figure 1-6 As shown, a nondestructive testing device for corn quality based on near-infrared spectroscopy technology includes a workbench 1 and a plurality of supporting legs 2 installed at the bottom thereof, and also includes: a detection protection mechanism and a detector 307 for protecting the detector 307. The detection protection mechanism is located above the workbench 1, and the detection protection mechanism includes a support vertical plate 3 installed above the workbench 1, one end of the support vertical plate 3 is fixedly connected to a mounting plate 301, a protective sleeve 302 is fixedly connected to the bottom of the mounting plate 301, a first connecting rope 303 is connected to one side of the outer wall of the protective sleeve 302, and an end of the first connecting rope 303 away from the protective sleeve 302 is connected to a first plug plate 304, the interior of the protective sleeve 302 is slidably connected to a limiting slide 305, the bottom of the limiting slide 305 is fixedly connected to a connecting plate 306, and one side of the inner wall of the protective sleeve 302 is connected to a limiting plate 308;

[0029] The present invention is further described in detail. The detector 307 is mounted on the bottom end of the connecting plate 306. The outer wall of the limiting slide 305 is slidably fitted with the inner wall of the protective sleeve 302. The protective sleeve 302 is provided with a first sliding groove. The first plug-in plate 304 is slidably plugged into the protective sleeve 302 through the first sliding groove. One side of the detector 307 does not contact the limiting plate 308.

[0030] As can be seen from the above, when the staff is testing the corn sample, they pull the first plug plate 304 to slide it toward the outside of the protective sleeve 302, so that the bottom of the protective sleeve 302 is opened. At this time, according to the effect of gravity, the detector 307 slides and extends toward the bottom of the protective sleeve 302. According to the effect of the limiting plate 308, the limiting slide plate 305 can be limited and supported, so that the detector 307 can be stably located above the placement groove 4 to test the corn sample on its inner wall. After the test is completed, the detector 307 is The first plug plate 304 is then inserted into the protective sleeve 302 to support the bottom of the detector 307, so that the detector 307 can be stably located inside the protective sleeve 302. With this structure, after the detection work is completed, the detector 307 can be stably protected inside the protective sleeve 302 to prevent it from being affected by external dust adhesion, which may cause inaccurate detection accuracy of the detector 307, thereby improving the detection efficiency of the detector 307 for corn samples;

[0031] The detection steps of the corn sample by the detector 307 are as follows:

[0032] Spectral data acquisition: Perform near-infrared spectral scanning on corn samples to obtain raw data in the full spectral range;

[0033] Data preprocessing: The first-order derivative method (FD) was used to preprocess the raw spectral data to remove background noise and enhance spectral features;

[0034] Data dimensionality reduction: Various dimensionality reduction algorithms, including joint interval partial least squares (S i PLS), competitive adaptive repeated weighting (CARS), successive projections (SPA), and correlation coefficient (CC), were applied to reduce the dimensionality of the preprocessed spectral data and screen out the most representative characteristic wavelengths.

[0035] Model establishment: Based on the selected characteristic wavelengths, support vector machine (SVM) and BP neural network models were established to predict the key quality components (moisture, oil, protein, starch) of corn samples;

[0036] Performance optimization and evaluation: Experimental verification shows that the Si PLS-CARS-SVM model demonstrates superior performance in predicting moisture, oil, protein, and starch content. Its prediction set determination coefficient (R2P), root mean square error (RMSEP), and residual prediction deviation (RPD) are all superior to those of the traditional BP neural network model.

[0037] The effects of the above detection method are as follows:

[0038] This method does not require sample destruction and enables rapid detection of corn quality components.

[0039] The accuracy and stability of the test results are improved by using a variety of data preprocessing and dimensionality reduction techniques;

[0040] In the prediction of key quality components, the Si PLS-CARS-SVM model showed excellent performance, with a determination coefficient (R2P) exceeding 0.9, a root mean square error less than 0.1, and a residual prediction deviation (RPD) exceeding 4.0.

[0041] Example 2

[0042] like Figure 1-6 As shown, on the basis of the above-mentioned embodiment 1, a uniform placement mechanism is additionally provided for uniformly placing the corn samples to be tested. The uniform placement mechanism is located on the workbench 1 and includes a placement slot 4 provided on the top of the workbench 1. A plurality of testing ports 401 are provided inside the placement slot 4. The bottom of the workbench 1 is located below the placement slot 4 and is connected to a collection box 402. A second connecting rope 403 is connected to one side of the outer wall of the collection box 402. An end of the second connecting rope 403 away from the collection box 402 is connected to a second plugboard 404.

[0043] The present invention is further specifically described in detail. The detection port 401 is connected to the interior of the collection box 402. A second chute is provided on the collection box 402. The second plugboard 404 is slidably plugged into the collection box 402 through the second chute. The top of the second plugboard 404 is slidably fitted with the bottom of the detection port 401. The bottom of the inner wall of the collection box 402 is inclined, and a discharge port is provided at the bottom of one side of the collection box 402. The placement slot 4 and the detector 307 are correspondingly arranged.

[0044] As can be seen from the above, when the detector 307 extends to the outside of the protective sleeve 302, the corn sample to be tested is placed in the placement groove 4, and the corn sample is moved so that it can be quickly located inside the detection port 401, and then it is tested by the detector 307. Through the setting of this structure, the function of the detection port 401 is utilized, and the corn sample can be quickly located inside the detection port 401 by moving the corn sample, so that the corn sample is evenly placed in the placement groove 4. Compared with the smooth setting of the interior of the sample tray, it is beneficial for the staff to spread the corn sample evenly, and accordingly improves the work efficiency of the staff in using the corn for testing;

[0045] After the corn sample test is completed, the second plug plate 404 is slid out to allow the corn sample inside the test port 401 to fall into the collection box 402. The bottom of the collection box 402 is tilted to facilitate the corn sample to flow out through the discharge port.

[0046] Furthermore, this design application is used to detect the quality of corn samples. By moving the corn sample, it can be quickly located inside the detection port 401, so that the corn sample is evenly placed in the placement groove 4, which is beneficial for the staff to spread the corn sample evenly.

[0047] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nondestructive detection device for corn quality based on near-infrared spectroscopy technology, characterized in that: The invention comprises a workbench (1) and a plurality of supporting legs (2) installed at the bottom thereof, and further comprises: A detection protection mechanism and a detector (307) are used to protect the detector (307), wherein the detection protection mechanism is located above the workbench (1), and the detection protection mechanism comprises a support vertical plate (3) installed above the workbench (1), one end of the support vertical plate (3) is fixedly connected to a mounting plate (301), the bottom of the mounting plate (301) is fixedly connected to a protection sleeve (302), one side of the outer wall of the protection sleeve (302) is connected to a first connecting rope (303), one end of the first connecting rope (303) away from the protection sleeve (302) is connected to a first plug plate (304), the interior of the protection sleeve (302) is slidably connected to a limiting slide plate (305), the bottom of the limiting slide plate (305) is fixedly connected to a connecting plate (306), and one side of the inner wall of the protection sleeve (302) is connected to a limiting plate (308); A uniform placement mechanism is used for uniformly placing corn samples to be tested, the uniform placement mechanism being located on a workbench (1), the uniform placement mechanism comprising a placement slot (4) provided on the top of the workbench (1), a plurality of testing ports (401) being provided inside the placement slot (4), a collection box (402) being connected to the bottom of the workbench (1) below the placement slot (4), a second connecting rope (403) being connected to one side of an outer wall of the collection box (402), and a second plug board (404) being connected to one end of the second connecting rope (403) away from the collection box (402).

2. The corn quality nondestructive detection device based on near infrared spectroscopy technology according to claim 1, characterized in that: The detector (307) is installed at the bottom end of the connecting plate (306), and the outer side wall of the limiting slide (305) and the inner side wall of the protective sleeve (302) are arranged to be slidably fitted.

3. The corn quality nondestructive detection device based on near infrared spectroscopy technology according to claim 1, characterized in that: A first sliding groove is provided on the protective sleeve (302), and the first plugging plate (304) is slidably plugged into the protective sleeve (302) through the first sliding groove.

4. The corn quality nondestructive detection device based on near infrared spectroscopy technology according to claim 1, characterized in that: One side of the detector (307) does not come into contact with the limiting plate (308).

5. The corn quality nondestructive testing device based on near infrared spectroscopy technology according to claim 1, characterized in that: The detection port (401) is connected to the interior of the collection box (402), a second chute is provided on the collection box (402), the second plug-in plate (404) is slidably plugged into the collection box (402) through the second chute, and the top of the second plug-in plate (404) and the bottom of the detection port (401) are slidably fitted.

6. The corn quality nondestructive testing device based on near infrared spectroscopy technology according to claim 1, characterized in that: The bottom of the inner wall of the collection box (402) is inclined, and a discharge port is provided at the bottom of one side of the collection box (402). The placement slot (4) and the detector (307) are correspondingly arranged.

Images