Tea quality monitoring system

Abstract

The utility model discloses a tea quality monitoring system which comprises a tea pressing device and a spectrum collecting device, the tea pressing device comprises a tea pressing piece and a driving mechanism, and the driving mechanism is connected with the tea pressing piece and used for driving the tea pressing piece to move so that tea to be detected can be compacted by the tea pressing piece; and the spectrum acquisition device is used for acquiring spectrum information of the tea leaves compacted by the tea pressing piece. According to the tea quality monitoring system disclosed by the utility model, the spectrum information of the tea compacted by the tea pressing piece is acquired through the spectrum acquisition device, so that the accuracy, the stability and the efficiency of tea near infrared spectrum detection can be improved, and the accuracy, the stability and the efficiency of tea quality evaluation are further improved.

Description

Technical Field

[0001] The utility model relates to the field of tea making, in particular to a tea quality monitoring system. Background Art

[0002] Making green is a key step in the production of oolong tea and other teas. If oolong tea is not made green enough, the tea soup will taste bitter and astringent; if it is made green too much, the aroma will be dull and the appearance will be dry. Therefore, ensuring that oolong tea reaches appropriate standards during the making green stage is the key to ensuring the high quality of oolong tea.

[0003] At present, the degree of green tea making is mainly evaluated by the processor's experience. This results in greater human interference in the green making process, making it difficult to accurately and efficiently grasp the appropriate standards for green making, which in turn leads to unstable quality of each batch of oolong tea.

[0004] In the related technology, in order to solve the problem of unstable manual evaluation results, the related detection equipment detects the quality of tea based on near-infrared spectroscopy. However, judging from the test results, there is a problem that the spectral information and test results are not accurate and stable enough.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] The utility model provides a tea quality monitoring system, which solves the technical problem of how to improve the accuracy and stability of tea near-infrared spectrum detection.

[0008] (II) Technical solution

[0009] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0010] A tea quality monitoring system, comprising:

[0011] The tea pressing device comprises a tea pressing member and a driving mechanism, wherein the driving mechanism is connected to the tea pressing member and is used to drive the tea pressing member to move so that the tea leaves to be tested are compacted by the tea pressing member, wherein the compaction means that the tea pressing member presses the tea leaves to reduce the internal gap of the tea leaves, flatten the surface of the tea leaves, and reduce the volume of the tea leaves;

[0012] The spectrum collecting device is used for collecting the spectrum information of the tea leaves compacted by the tea pressing member.

[0013] In some embodiments, the tea pressing piece is made of a transparent material, and the spectrum collection device is used to collect spectrum information of the compacted tea leaves through the tea pressing piece.

[0014] In some embodiments, the tea pressing member is a quartz plate, and the thickness of the quartz plate in the area opposite to the spectrum collection device is uniform.

[0015] In some embodiments, a conveying mechanism is included, which is located directly below the tea pressing device and the spectrum collection device and is used to convey tea leaves; the driving mechanism is a lifting mechanism and is used to drive the tea pressing device to move so that the tea leaves to be tested are compacted between the conveying mechanism and the tea pressing device.

[0016] In some embodiments, a conveying mechanism is included, which is arranged opposite to the tea pressing device and the spectrum collection device and is used to convey tea leaves; the driving mechanism is used to drive the tea pressing device to move so that the tea leaves to be detected are compacted between the conveying mechanism and the tea pressing device.

[0017] In some embodiments, it includes a box body, wherein the box body cover is arranged on the conveying mechanism and is provided with an inlet and an outlet, and the conveying mechanism passes through the inlet and the outlet; the tea pressing device and the spectrum collection device are arranged inside the box body.

[0018] In some embodiments, an image acquisition device is included, and the image acquisition device includes a camera and a ring-shaped LED light arranged on the periphery of the camera, and the camera is used to collect image information of tea leaves.

[0019] In some embodiments, the invention comprises a box body, wherein the box body comprises a baffle, wherein the baffle divides the interior of the box body into two spaces; the spectrum acquisition device comprises a lighting lamp arranged inside the box body, the tea pressing device and the spectrum acquisition device are located in one of the spaces, and the image acquisition device is located in the other space.

[0020] The utility model also provides a tea quality detection method, comprising the following steps: using the above-mentioned tea quality monitoring system to collect the spectral information of the tea.

[0021] The utility model also provides a tea processing method, including the above-mentioned tea quality detection method.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the tea quality monitoring system provided by the utility model has the following beneficial effects:

[0024] When the tea quality monitoring system is working, the tea pressing device drives the tea pressing piece to move toward the tea to be tested through the driving mechanism to compact the tea, and the spectrum acquisition device collects the spectrum information of the compacted tea to reflect the quality of the tea through the spectrum information; wherein, compacting the tea can make its shape more regular and its surface flatter, which is conducive to the spectrum acquisition device to more accurately capture the spectrum information of the tea and improve the accuracy of measurement.

[0025] At the same time, the voids and air content inside the tea leaves will affect the collection of the spectrum. Compacting the tea leaves can reduce these internal voids and make the substances in the tea leaves more evenly distributed, thereby increasing the stability of the spectral information. When testing multiple times or under different conditions, more consistent and reliable spectral data can be obtained, thus increasing the stability of the spectral information.

[0026] Last but not least, compacting the tea leaves can make them pack more tightly together and increase the amount of tea leaves per unit area, which helps to collect more spectral information in a limited space. Combined with the increase in the stability of the spectral information mentioned above, it can reduce the number of tests required and improve the efficiency of data collection.

[0027] It can be seen that the tea quality monitoring system and tea processing method of the utility model can improve the accuracy, stability and efficiency of tea spectral detection. Since the spectral information is positively correlated with tea quality evaluation, the accuracy, stability and efficiency of tea quality evaluation are further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional diagram of the tea quality monitoring system in the embodiment.

[0029] Figure 2 It is a three-dimensional diagram of the internal structure of the tea quality monitoring system in the embodiment.

[0030] Figure 3 It is a front view of the internal structure of the tea quality monitoring system in the embodiment.

[0031] Figure 4 It is a schematic diagram of a tea quality monitoring system provided with a tea-making machine in the embodiment.

[0032] Reference numerals:

[0033] Tea pressing device 1, tea pressing member 11, driving mechanism 12, quartz plate 110, frame 111;

[0034] Spectrum collection device 2, optical fiber collimator 21, spectrometer 22, halogen tungsten lamp 23;

[0035] Conveying mechanism 3, conveyor belt 31, motor 32;

[0036] Box body 4, material inlet 41, material outlet 42, baffle 43;

[0037] Image acquisition device 5, camera 51, annular LED light 52;

[0038] The blue making machine 6, the fixed bracket 61, the rotating drum 62, the hot air pipe 63, the air pipe bracket 64, the air pipe sleeve 65, and the brush 66. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0040] In the related technology, in order to solve the problem of unstable manual evaluation results, the related detection equipment detects the quality of tea based on near-infrared spectroscopy. However, judging from the test results, there is a problem that the spectral information and test results are not accurate and stable enough.

[0041] In order to solve the above technical problems, the utility model inventors found that the cause of the problem is that there are large internal gaps between the tea leaves to be tested, and at the same time, the surface of the tea leaves is not flat enough. These internal gaps and uneven surfaces make the collected spectral information inaccurate and unstable.

[0042] In view of the above reasons, this embodiment provides a tea quality monitoring system. Figures 1 to 3 As shown, Figure 1 is a three-dimensional diagram of the tea quality monitoring system in the embodiment, Figure 2 is a three-dimensional diagram of the internal structure of the tea quality monitoring system in the embodiment, Figure 3 It is a front view of the internal structure of the tea quality monitoring system in the embodiment.

[0043] A tea quality monitoring system of this embodiment includes: a tea pressing device 1 and a spectrum collection device 2.

[0044] The tea pressing device 1 comprises a tea pressing piece 11 and a driving mechanism 12. The driving mechanism 12 is connected to the tea pressing piece 11 and is used to drive the tea pressing piece 11 to move so that the tea leaves to be tested are compacted by the tea pressing piece 11.

[0045] The above-mentioned tea pressing device 1 is used for compacting tea leaves, wherein, exemplarily, the driving mechanism 12 is an existing mechanism capable of driving components to move, such as a ball screw moving module, a gear rack moving module, etc.; the tea pressing member 11 is used for contacting with the tea leaves and compacting the tea leaves, and its shape and the contact area with the tea leaves can be selected according to actual needs; it can be understood that the above-mentioned compacting of tea leaves refers to pressing the tea leaves by the tea pressing member 11 to reduce the internal gap of the tea leaves, make the originally curved surface of the tea leaves smoother, and reduce the volume of the tea leaves.

[0046] The spectrum collecting device 2 is used to collect the spectrum information of the tea leaves compacted by the tea pressing member 11.

[0047] The above-mentioned spectrum collection device 2 is a device capable of collecting spectral information of tea leaves. Exemplarily, the spectrum collection device 2 is a near-infrared spectrum collection device 2, including a fiber optic collimator 21 facing the tea leaves and a spectrometer 22 connected to the fiber optic collimator 21 through an optical fiber.

[0048] It is understandable that the above-mentioned tea pressing device 1 and spectrum collection device 2 can be installed on a mounting base such as a rack, a box 4, a work platform, etc. according to the on-site environment to ensure the position and connection relationship between the above-mentioned and their respective components.

[0049] When the tea quality monitoring system of the above technical solution is working, the tea pressing device 1 drives the tea pressing member 11 to move toward the tea to be tested through the driving mechanism 12 to compact the tea, and the spectrum collection device 2 collects the spectrum information of the compacted tea, and reflects the quality of the tea through the spectrum information. The specific reflection method can adopt the corresponding method of spectrum information and tea quality in the prior art, which will not be repeated here; wherein, compacting the tea can make its shape more regular and the surface more flat, which is conducive to the spectrum collection device 2 to more accurately capture the spectrum information of the tea and improve the accuracy of measurement; at the same time, the voids and air content inside the tea will affect the collection of the spectrum, and compacting the tea can reduce these internal voids, so that the distribution of substances in the tea is more uniform, thereby increasing the stability of the spectrum information, and when multiple tests or tests under different conditions are performed, more consistent and reliable spectrum data can be obtained, thereby increasing the stability of the spectrum information; last but not least, compacting the tea can make the tea more densely packed together, increase the amount of tea per unit area, which helps to collect more spectrum information in a limited space, combined with the increase in the stability of the above-mentioned spectrum information, can reduce the number of tests required and improve the efficiency of data collection.

[0050] It can be seen that the tea quality monitoring system of the above technical solution can reduce the internal gaps of the tea leaves, improve the flatness of the tea leaves' surface, and reduce the volume of the tea leaves through the tea pressing device 1, thereby improving the accuracy, stability, and efficiency of near-infrared spectral detection of tea leaves. Since spectral information is positively correlated with tea quality evaluation, the accuracy, stability, and efficiency of tea quality evaluation are further improved.

[0051] In one embodiment of the above tea pressing member 11, the tea pressing member 11 is made of a transparent material. Figure 2 As shown, the spectral acquisition device 2 is used to collect spectral information of the compacted tea leaves through the tea pressing piece 11, that is, the tea pressing piece 11 is located between the spectral acquisition device 2 and the tea leaves. With this arrangement, the tea pressing piece 11 can stabilize the tea leaves and ensure that the surface of the tea leaves is not easy to move when the spectral information is collected, thereby improving the accuracy of spectral detection.

[0052] Exemplarily, the tea pressing member 11 is a quartz plate 110, see Figure 2 As shown, the quartz plate 110 is fixed on the quartz plate frame 111, and the quartz plate frame 111 is connected to the driving end of the driving mechanism 2; the thickness of the area opposite to the quartz plate 110 and the spectrum collection device 2 is uniform, which can reduce the influence of the tea pressing piece 11 on the spectrum information collection and improve the accuracy of spectrum detection.

[0053] Exemplarily, the pressed tea piece 11 is a transparent plastic plate, such as an acrylic plate, and the thickness of the transparent plastic plate in the area opposite to the spectrum collection device 2 is uniform, which can also reduce the impact of the pressed tea piece 11 on the collection of spectral information and improve the accuracy of spectral detection.

[0054] In another embodiment of the above-mentioned pressed tea piece 11, the pressed tea piece 11 is made of non-transparent material, and the spectral collection device 2 no longer collects the spectral information of the compacted tea leaves through the pressed tea piece 11, but collects the spectral information of the tea leaves from the side direction of the tea leaves and the pressed tea piece 11 or in the direction away from the spectral collection device 2, or collects the spectral information of the tea leaves from the detection port opened on the pressed tea piece 11.

[0055] Exemplarily, the tea quality monitoring system further includes a conveying mechanism 3, see Figure 2 As shown, on the basis that the tea pressing piece 11 is made of transparent material and the spectrum collection device 2 is used to collect spectral information through the tea pressing piece 11, the conveying mechanism 3 is located directly below the tea pressing device 1 and the spectrum collection device 2, and is used to convey tea leaves; the driving mechanism 12 is a lifting mechanism, and is used to drive the tea pressing piece 11 to move, so that the tea leaves to be detected are compacted between the conveying mechanism 3 and the tea pressing piece 11; wherein, in one embodiment of the lifting mechanism, the lifting mechanism is a ball screw module driven by a motor, and the moving blocks of the tea pressing piece 11 and the roller screw module are connected by bolt connection or welding, and the conveying mechanism 3 can convey the tea leaves to pass directly below the tea pressing device 1 and the spectrum collection device 2, so that the tea pressing device 1 can compact the tea leaves on the conveying mechanism 3, and the spectrum collection device 2 can collect the spectrum information of the compacted tea leaves through the tea pressing piece 11, thereby realizing the automation of tea transportation, compaction and spectrum information collection, and improving the efficiency of spectrum collection.

[0056] Exemplarily, the tea quality monitoring system also includes a conveying mechanism 3, which is arranged opposite to the tea pressing device 1 and the spectrum collection device 2, and is used to convey the tea leaves so that the tea pressing piece 11 can move toward the conveying mechanism 3 to compact the tea leaves. The spectrum collection device 2 can be arranged on a frame or on the conveying mechanism 3 in the lateral direction of the tea leaves and the tea pressing piece 11; the driving mechanism 12 is used to drive the tea pressing piece 11 to move so that the tea leaves to be tested are compacted between the conveying mechanism 3 and the tea pressing piece 11. In this way, when the tea picking piece is a non-transparent piece, the spectrum collection device 2 can collect the spectral information of the tea leaves from the lateral direction of the tea leaves and the tea pressing piece 11 or through the conveying mechanism 3, or collect the spectral information of the tea leaves from the detection port opened on the tea pressing piece 11.

[0057] For example, the conveying mechanism 3 is a conveyor belt or a conveyor chain. Figure 2 As shown, the conveyor belt includes a conveyor belt 31 and a motor 32 for driving the conveyor belt 31 to move. The output shaft of the motor 32 is connected to the driving wheel of the conveyor belt 31. The motor 32 can control the conveyor belt to pause by stopping.

[0058] It is understandable that, in addition to the above-mentioned method of conveying tea leaves through the conveying mechanism 3, in some embodiments, tea leaves can also be conveyed manually.

[0059] Exemplarily, on the basis of providing the conveying mechanism 3, the tea quality monitoring system further includes a box 4, see Figure 1 , Figure 2 As shown, the box 4 is covered on the conveying mechanism 3 and is provided with an inlet 41 and an outlet 42. The conveying mechanism 3 passes through the inlet 41 and the outlet 42, and the tea pressing device 1 and the spectrum collection device 2 are installed inside the box 4. For example, the tea pressing device 1 is fixed on the back of the box 4, and the spectrum collection device 2 is installed on the top of the box 4. The conveying mechanism 3 conveys the tea leaves to be tested into the box 4 from the inlet 41, and outputs the tested tea leaves from the outlet 42. Such an arrangement can not only realize the automation of tea transportation, compaction and spectral information collection, and improve the efficiency of spectral collection, but also can protect the tea pressing device 1 and the spectrum collection device 2 through the box 4, and stabilize the tea detection environment at the same time.

[0060] It is understandable that the box 4 can also be used without the conveying mechanism 3. For example, when the tea leaves are conveyed manually, the box 4 is placed on a workbench or on the ground.

[0061] Exemplarily, the tea quality monitoring system includes an image acquisition device 5, see Figure 2 and Figure 3As shown, the image acquisition device 5 includes a camera 51. The difference from the existing image acquisition device 5 is that it also includes a ring-shaped LED light 52 arranged on the periphery of the camera 51, wherein the ring-shaped LED light 52 can be connected to the top of the box 4 through an LED light bracket. The camera 51 is used to collect image information of tea leaves on the conveying mechanism 3 to monitor the external characteristics of the tea leaves. In one embodiment of the camera 51, the camera 51 adopts an existing visual camera, such as a surface array camera, and is connected to the box 4 through a camera bracket. Through the setting of the ring-shaped LED light 52, the camera 51 can collect image information more accurately.

[0062] Furthermore, on the basis of setting the image acquisition device 5, the tea quality monitoring system also sets a box 4 to reduce the light interference between the image acquisition device 5 and the spectrum acquisition device 2. For details, see Figure 2 and Figure 3 As shown, the box 4 includes a baffle 43, which separates the inside of the box 4 into two spaces. It can be understood that the baffle is made of opaque material or low light transmittance material; the spectrum acquisition device 2 includes a lighting lamp arranged inside the box 4. For example, the lighting lamp is a halogen tungsten lamp 23, and is suspended on the top of the box 4 through a light source bracket. The tea pressing device 1 and the spectrum acquisition device 2 are located in one of the spaces, and the image acquisition device 5 is located in the other space, wherein the camera 51 and the ring LED light 52 of the image acquisition device 5 can be installed on the top of the box 4. With this arrangement, the illumination of the image acquisition device 5 and the spectrum acquisition device 2 does not affect each other.

[0063] Exemplarily, the tea quality monitoring system also includes a tea making machine 6, combined with Figure 2 and Figure 4 As shown, Figure 4 Schematic diagram of a tea-making machine for a tea-quality monitoring system in an embodiment. The tea-making machine 6 includes a fixed bracket 61, a rotating drum 62, a hot air pipe 63, a duct bracket 64 and an air pipe sleeve 65. The rotating drum 62 can be rotatably arranged on the fixed bracket 61 in the manner of the rotating drum 62 of the existing tea-making machine 6. The rotating drum 62 drives the tea leaves inside to turn over by rotating. The hot air pipe 63 is divided into two sections. The two sections of the hot air pipe 63 are coaxially and spaced apart and are located in the middle of the rotating drum 62 for conveying hot air required for tea-making into the rotating drum 62. The hot air pipe 63 can be fixed inside the rotating drum 62 by a connecting rod and rotate synchronously with the rotating drum 62. The air pipe bracket 64 is connected to the fixed bracket 61, such as by welding, and axially penetrates the hot air pipe 63. The air pipe bracket 64 can remain fixed when the rotating drum 62 and the hot air pipe 63 rotate. The air pipe sleeve 65 is connected to the air pipe bracket 64 by welding, bolting, etc., such as Figure 4As shown, the inner wall of the air duct sleeve 65 is connected to the air duct bracket 64 through the connecting ribs, and is rotatably sleeved between the two sections of the hot air duct 63. The air duct sleeve 65 is located inside the rotating drum 62, and its inner diameter can be slightly larger than the outer diameter of the hot air duct 63. A channel for conveying hot air is formed between the air duct sleeve 65 and the hot air duct 63. In this embodiment, the rotating drum 62 is configured as the above-mentioned conveying mechanism 3, and the box body 4 is located inside the rotating drum 62 and connected to the air duct sleeve 65, such as connecting a short shaft to the air duct sleeve 65, and connecting the box body 4 through the short shaft. The tea pressing member 11, the spectrum collection device 2 and the image collection device 5 face the bottom of the rotating drum 62. In order to prevent tea leaves from entering between the air duct sleeve 65 and the hot air duct 63, the air duct sleeve 65 is provided with a brush 66 in the area where it is sleeved with the hot air duct 63, and the brush 66 covers the gap between the air duct sleeve 65 and the hot air duct 63. During operation, the tea leaves are turned over in the drum 62 and become green under the action of the hot air delivered by the hot air duct 63. During the greening process, the air duct sleeve 65 and the air duct bracket 64 will not rotate, thereby fixing the box body 4 relative to the fixed bracket 61. After a certain stage of greening, the drum 62 stops rotating, and the tea pressing device 1 compacts the tea leaves inside the drum 62 through the tea pressing member 11. The spectrum acquisition device 2 and the image acquisition device 5 collect spectrum and image information of the compacted tea leaves, and evaluate the quality of the tea leaves and the degree of greening after the collection. The greening machine 6 can choose to continue or stop greening according to the degree of greening and output the tea leaves. In this way, compared with the traditional method of taking out the tea leaves in the greening stage from the drum 62 to evaluate the degree of greening, the advantage of this embodiment is that the degree of greening of the tea leaves can be evaluated in real time inside the drum 62 during the greening process, reducing the adverse effects of the changes of the tea leaves out of the greening environment on the evaluation results, thereby improving the accuracy of the evaluation results. At the same time, the evaluation process omits the operation of taking out the tea leaves, thereby improving the evaluation efficiency.

[0064] This embodiment provides a tea quality detection method, comprising the following steps: using the above-mentioned tea quality monitoring system to collect spectral information of tea leaves, and those skilled in the art can evaluate the quality of tea leaves based on the spectral information.

[0065] Exemplarily, the method of evaluating tea quality based on spectral information is as follows: the spectral information is transmitted to a computer, and after being processed by data processing software, the tea quality information is obtained, and the tea quality information is displayed on a display screen; wherein the data processing software can be an existing data processing software for tea spectral information. Exemplarily, the data processing software is a tea internal component detection system software designed based on matlab software and combined with C# programming language. MATLAB is a fourth-generation high-level programming language and interactive environment developed by MathWorks, an American company. The construction of data processing software is common knowledge known to technicians in this field and will not be repeated here.

[0066] Exemplarily, the above tea quality detection method further includes an image detection part, and the specific steps are as follows:

[0067] Step 1: The tea leaves are transported to the box 4 by the conveying mechanism 3, the annular LED light 52 is turned on, and the image acquisition device 5 acquires images of the tea leaves in the box 4 and on the conveying mechanism 3, thereby transmitting the acquired image information to the computer, and after image software recognition, the recognition result is displayed on the display screen;

[0068] Exemplarily, the image software is a tea appearance detection system software designed based on OpenCV (Open Source Computer Vision Library) software and C# programming language. The construction of image software is common knowledge known to those skilled in the art.

[0069] Step 2: After image acquisition, the tea leaves continue to be transported to the spectrum acquisition device 2 via the conveying mechanism 3. The conveying mechanism 3 is paused, the lighting lamp is turned on, and the driving mechanism 12 is started to drive the tea pressing member 11 to move downward to compact the tea leaves. Then, the spectrum acquisition device 2 performs spectrum acquisition on the compacted tea leaves, and the collected spectrum information is transmitted to the computer. After being processed by the data processing software, the result is displayed on the display screen.

[0070] Step 3: The computer fuses the image information and spectral information at the decision-making level, makes a judgment on the degree of blueness, and displays the recognition results on the human-computer interaction interface.

[0071] Exemplarily, step 3 includes the following steps: collecting tea samples with different degrees of greening, and obtaining their image information and spectral information to ensure that the samples are representative and cover various possible degrees of greening; image preprocessing: denoising, enhancing, segmenting and other processing of the tea images to extract key features of the tea, such as color, texture, shape, etc., spectral preprocessing: correcting, smoothing and normalizing the spectral data to eliminate instrument errors and background noise; image feature extraction: using image processing technology to extract the color histogram, texture features, edge information, etc. of the tea image; spectral feature extraction: analyzing the spectral data to extract the characteristic wavelength and intensity information related to the degree of greening of the tea; fusing the extracted image features and spectral features, This can be achieved through simple feature concatenation, weighted averaging or more complex methods. The fused features should be able to comprehensively reflect the degree of tea leaves. Use tea samples with known degrees of tea leaves and the corresponding fused feature data to train a classifier or regression model. You can choose support vector machine (SVM), random forest, neural network and other algorithms for training. Use an independent test set to evaluate the performance of the model, such as accuracy, recall, F1 value, etc., and optimize the model based on the evaluation results, including adjusting model parameters, selecting better feature fusion methods, etc. Deploy the trained model to actual applications, receive new tea images and spectral data, preprocess, extract features and fuse the new data, and then use the model to judge the degree of tea leaves.

[0072] Exemplarily, the tea quality monitoring system and tea quality evaluation method described above are used to conduct a green tea inspection on 100 kg of oolong tea. The system starts running after the shaking of the oolong tea begins; the moving speed of the conveying mechanism 3 is set to 50 mm / s; the tea leaves during shaking are scattered on the conveying mechanism 3 due to their own gravity, and image information is collected by the image acquisition device 5, and image recognition is performed by a computer; spectral information is collected by the near-infrared spectrum acquisition device 2, and after spectral data processing by a computer, data fusion is performed in combination with image recognition, and the result is finally output on a display screen, and the judgment results of the key nodes of green tea are compared with the results of the on-site review by manual experts. The judgment results of the image and near-infrared detection equipment are that 28 out of 30 samples at the end of the second airing are consistent with the expert review results, and 2 are judged as insufficient shaking, with a judgment accuracy of 93.3%; the tea quality monitoring system is that 29 out of 30 samples at the end of the third shaking are consistent with the manual expert review, and 1 is judged as excessive shaking, with a judgment accuracy of 96.7%.

[0073] Exemplarily, the above step 1 also includes the following steps: transporting the tea leaves to the drum 62 of the tea-making machine 6 for tea-making process, and performing step 1 during the tea-making process.

[0074] The utility model also provides a tea processing method, including the above-mentioned tea quality detection method, adjusting processing parameters according to the tea quality detection results. Exemplarily, after evaluating the tea quality and the degree of greening through the image information and spectral information of the tea, the greening time is adjusted according to the degree of greening. For example, when the tea is insufficient, the greening time is increased, and when the greening is in transition, the greening time is reduced. Such an arrangement is conducive to dynamic control of the tea processing process and improvement of tea quality.

[0075] 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 the 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 tea quality monitoring system, characterized in that: include: The tea pressing device comprises a tea pressing member and a driving mechanism, wherein the driving mechanism is connected to the tea pressing member and is used to drive the tea pressing member to move so that the tea leaves to be tested are compacted by the tea pressing member, wherein the compaction means that the tea leaves are pressed by the tea pressing member to reduce the internal gap of the tea leaves, flatten the surface of the tea leaves, and reduce the volume of the tea leaves; The spectrum collecting device is used for collecting the spectrum information of the tea leaves compacted by the tea pressing member.

2. The tea quality monitoring system according to claim 1, characterized in that: The tea pressing piece is made of a transparent material, and the spectrum collection device is used to collect spectrum information of the compacted tea leaves through the tea pressing piece.

3. The tea quality monitoring system according to claim 2, characterized in that: The tea pressing member is a quartz plate, and the thickness of the area of ​​the quartz plate opposite to the spectrum collection device is uniform.

4. The tea quality monitoring system according to claim 2 or 3, characterized in that: It comprises a conveying mechanism, which is located directly below the tea pressing device and the spectrum collection device and is used to convey tea leaves; the driving mechanism is a lifting mechanism and is used to drive the tea pressing device to move so that the tea leaves to be detected are compacted between the conveying mechanism and the tea pressing device.

5. The tea quality monitoring system according to claim 4, characterized in that: It comprises an image acquisition device, which comprises a camera and a ring-shaped LED light arranged on the periphery of the camera, and the camera is used to acquire image information of the tea leaves on the conveying mechanism.

6. The tea quality monitoring system according to claim 5, characterized in that: It comprises a box body, the box body cover is arranged on the conveying mechanism, and is provided with an inlet and an outlet, and the conveying mechanism passes through the inlet and the outlet; The box body includes a baffle, and the baffle divides the interior of the box body into two spaces; The spectrum acquisition device comprises a lighting lamp arranged inside the box, the tea pressing device and the spectrum acquisition device are located in one of the spaces, and the image acquisition device is located in another space.

7. The tea quality monitoring system according to claim 6, characterized in that: The invention comprises a green making machine, wherein the green making machine comprises a fixed support, a rotating drum rotatably arranged on the fixed support, two sections of hot air pipes coaxially arranged and located in the middle of the rotating drum, a duct support connected to the fixed support and axially penetrating the hot air pipe, and a duct sleeve connected to the duct support and rotatably sleeved between the two sections of the hot air pipe, wherein the duct sleeve is located inside the rotating drum; The box body is located in the rotating drum and is connected to the air duct sleeve. The tea pressing member, the spectrum acquisition device and the image acquisition device are facing the bottom of the rotating drum. The rotating drum is configured as the conveying mechanism.

8. The tea quality monitoring system according to claim 7, characterized in that: The air duct sleeve is provided with a brush in the area where it is sleeved with the hot air pipe, and the brush covers the gap between the air duct sleeve and the hot air pipe.

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