Method for monitoring growth traits of tender shoots of tea leaves by utilizing photoelectric detection technology

Abstract

The invention discloses a method for monitoring the growth traits of tender shoots of tea leaves by using a photoelectric detection technology, which comprises the following steps: arranging a photoelectric detection device around the tender shoots to be detected, and adjusting the posture; starting an illumination intensity terminal of the photoelectric detection device, and obtaining initial illumination intensity fed back by each light intensity sensor; starting a light emitter of the photoelectric detection device, and obtaining the illumination intensity fed back by each light intensity sensor again; calculating an illumination intensity difference value corresponding to each light intensity sensor; and representing the distribution condition of tea hair on the tender shoots of the tea leaves according to the obtained illumination intensity difference value. By adopting the scheme of the invention, the growth traits of the tender shoots of the living tea leaves are evaluated through the distribution condition of the tea hair with a low-cost, rapid and effective means, the distribution condition of the tea hair can be quantitatively and more accurately evaluated, and the distribution condition of the tea hair in different growth periods can be rapidly evaluated.

Description

Technical Field

[0001] The invention belongs to the technical field of tea bud growth trait monitoring, and in particular relates to a method for monitoring tea bud growth trait by utilizing photoelectric detection technology. Background Art

[0002] At present, there are two main technical routes for monitoring the growth characteristics of tea buds. One is to observe the physical characteristics of tea buds with the naked eye or even with the help of a magnifying glass, and then evaluate their growth characteristics. The other is to observe and analyze the morphology of the buds with the help of image recognition technology, and then evaluate their growth characteristics. However, the aforementioned method 1 is subject to a large number of subjective factors, which is not conducive to quantitative evaluation. The aforementioned method 2 must rely on high-precision visual terminals and complex algorithms to achieve, and the cost of the required facilities is very high. In addition, both methods have the problems of inconvenient operation and difficulty in operation.

[0003] Studies have shown that tea fuzz has the characteristic of covering hair, and its length, density, thickness, color, and distribution characteristics are the specific manifestations of the characteristics of tea varieties, so it can be regarded as one of the important morphological characteristics of tea trees; fuzz is rich in quality components such as tea polyphenols, amino acids, caffeine, etc., which have an important impact on the appearance and flavor formation of green tea, white tea, black tea, etc. Therefore, the presence and amount of tea fuzz is one of the main economic traits of tea varieties. Therefore, using the characteristics of fuzz to evaluate the growth characteristics of tea buds is a feasible technical route. However, except for rough observation with the naked eye or even with the help of a magnifying glass, there is currently no low-cost, fast, simple and effective means to evaluate the growth characteristics of living tea buds through the distribution of fuzz. Summary of the invention

[0004] At least in view of the problems mentioned in the background technology, one of the purposes of the present invention is to provide a method for monitoring the growth characteristics of tea buds using photoelectric detection technology.

[0005] The present invention adopts the following technical solution.

[0006] A method for monitoring the growth characteristics of tea buds using photoelectric detection technology, comprising the following steps: Step 1, arrange the photoelectric detection device around the tender shoots to be tested and adjust the posture; The photoelectric detection device includes a housing, on which a light emitter and an incident collimator are arranged, and a plurality of independent light intensity sensors are arranged beside and opposite to the light emitter, each light intensity sensor being connected to a corresponding light intensity terminal; Step 2, turn on the light intensity terminal of the photoelectric detection device to obtain the initial light intensity Lx0 fed back by each light intensity sensor; Step 3, turning on the light emitter of the photoelectric detection device, and obtaining the light intensity Lx1 fed back by each light intensity sensor again; Step 4, calculate the light intensity difference δLx corresponding to each light intensity sensor, δLx= Lx1- Lx0; Step 5, characterizing the distribution of tea hairs on the tea buds according to the obtained light intensity difference δLx.

[0007] In order to more accurately characterize the distribution of tea hairs, the shell is cylindrical, and the light intensity sensors are distributed on the shell in an arc shape as a whole.

[0008] As a preferred embodiment, the tea buds are tea leaves with white tea hairs on the buds.

[0009] As a preferred solution, steps 1 to 3 are carried out at noon or in the afternoon on a sunny day.

[0010] In order to more accurately characterize the distribution of tea hairs, the light emitted by the light emitter is monochromatic red light.

[0011] Furthermore, the tea photoelectric detection device also includes a base, which is installed on the rotating mechanism, and a screw lifting rod mechanism is arranged on the base, and the movable seat of the screw lifting rod mechanism is connected to the shell through a U-shaped frame; the light emitter of the photoelectric detection device is adjusted to the target position by controlling the operation of the rotating mechanism and the screw lifting rod mechanism.

[0012] Beneficial effects: The scheme of the present invention can be used to evaluate the growth characteristics of living tea buds through the distribution of tea hairs in a low-cost, fast, simple and effective manner. The distribution of tea hairs can be quantitatively and more accurately evaluated, and the distribution of tea hairs in different growth periods can be quickly evaluated. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 , Figure 2 It is a three-dimensional schematic diagram of the photoelectric detection device in Example 1; Figure 3 is a cross-sectional schematic diagram of the photoelectric detection device in Example 1; Figure 4 This is a schematic diagram of a disassembled housing of the photoelectric detection device in Example 1; Figure 5 A schematic diagram of the use state of the photoelectric detection device in Example 1; Figure 6 This is a schematic diagram of the second usage state of the photoelectric detection device in Example 1; Figure 7 Schematic diagram of the use status of the photoelectric detection device in Example 1. DETAILED DESCRIPTION

[0014] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention. Example 1

[0015] Combination Figures 1 to 7 As shown, a method for monitoring the growth characteristics of tea buds by using photoelectric detection technology adopts a photoelectric detection device, which includes a shell 1, on which a light emitter 2 and an incident collimator 3 are arranged, the light emitted by the light emitter 2 is monochromatic red light (Note: monochromatic red light can be absorbed by chlorophyll in the buds), and a plurality of independent light intensity sensors 3 are arranged beside and opposite to the light emitter 2, each light intensity sensor 3 is connected to a corresponding light intensity terminal; the shell 1 is cylindrical, the top of the shell 1 is a closed structure, and the bottom of the shell 1 is an open structure, the light intensity sensors 3 are distributed on the shell 1 in an arc shape as a whole, and the figure schematically embodies six light intensity sensors 3 (including a first light intensity sensor 31 , a second light intensity sensor 32, a third light intensity sensor 33, a fourth light intensity sensor 34, a fifth light intensity sensor 35, and a sixth light intensity sensor 35); also includes a base 4, the base 4 is mounted on a rotating mechanism 10, the rotating mechanism 10 adopts a worm gear transmission mechanism driven by a motor, the rotating mechanism 10 is mainly used to control the deflection position of the shell 1 and its internal components, a screw lifting rod mechanism 5 is arranged on the base 4, the movable seat 6 of the screw lifting rod mechanism 5 is connected to the shell 1 through a U-shaped frame 7, the screw lifting rod mechanism 5 is mainly used to control the height of the shell 1 and its internal components; by controlling the operation of the rotating mechanism 10 and the screw lifting rod mechanism 5, the light emitter 2 of the photoelectric detection device is adjusted to the target position.

[0016] In this embodiment, the method for monitoring the growth characteristics of tea buds (tea buds refer to tea leaves with white tea hairs on the buds, and the white tea hairs can reflect monochromatic red light) using photoelectric detection technology is implemented at noon or in the afternoon on a sunny day, so as to avoid the influence of dew or rain on light intensity. The steps include: Step 1, arrange the photoelectric detection device around the tender buds to be detected, and adjust the posture to ensure that the tender buds of tea are located at the axis of the shell 1 as much as possible; Step 2, turning on the light intensity terminal of the photoelectric detection device to obtain the initial light intensity Lx0 fed back by each light intensity sensor 3; Step 3, turning on the light emitter 2 of the photoelectric detection device, and obtaining the light intensity Lx1 fed back by each light intensity sensor 3 again; Step 4, calculating the light intensity difference δLx corresponding to each light intensity sensor 3, δLx= Lx1- Lx0; Step 5, characterizing the distribution of tea hairs on the tea buds according to the obtained light intensity difference δLx.

[0017] In one of the application cases, the monitoring of tea buds 9 is used as an example: At the first monitoring time point, the initial light intensity Lx0 fed back by each light intensity sensor 3 is 205Lx. Figure 5 As shown, a part of the light beam emitted by the light emitter 2 is directly incident on the fourth light intensity sensor 34 on the opposite side thereof, and another part of the light beam is incident on the tender buds 9 and absorbed, and it and part of the light beam are reflected by the tea leaves to other light intensity sensors; wherein, the light intensity Lx1 fed back by the first light intensity sensor 31 is 295Lx, the light intensity Lx1 fed back by the second light intensity sensor 32 is 278Lx, the light intensity Lx1 fed back by the fourth light intensity sensor 34 is 420Lx, and the light intensity Lx1 fed back by the sixth light intensity sensor 36 is 327Lx, then, the light intensity difference δLx corresponding to the first light intensity sensor 31 is 90Lx, the light intensity difference δLx corresponding to the second light intensity sensor 32 is 73Lx, and the fourth light intensity sensor 36 is 18Lx. The light intensity difference δLx corresponding to the intensity sensor 34 is 215Lx, and the light intensity difference δLx corresponding to the sixth light intensity sensor 36 is 122Lx; therefore, it can be concluded that the tea hair quantity (or tea hair density, the same below) of the tea buds 9 corresponding to the reflected light from the sixth light intensity sensor 36 is relatively large, the tea hair quantity of the tea buds 9 corresponding to the reflected light from the second light intensity sensor 32 is relatively small, the tea hair quantity of the tea buds 9 corresponding to the reflected light from the first light intensity sensor 31 is relatively centered (median), and the light corresponding to the fourth light intensity sensor 34 is mainly the direct part, which needs further detection and evaluation, and specifically, the photoelectric detection device can be adjusted to rotate the light emitter 2 to a set angle for detection; At the second monitoring time point, the initial light intensity Lx0 fed back by each light intensity sensor 3 is 210Lx. Figure 6As shown, the light intensity difference δLx corresponding to the second light intensity sensor 32 is 264Lx, the light intensity Lx1 fed back by the fourth light intensity sensor 34 is 508Lx, and the light intensity Lx1 fed back by the sixth light intensity sensor 36 is 291Lx. Then, the light intensity difference δLx corresponding to the second light intensity sensor 32 is 54Lx, the light intensity difference δLx corresponding to the fourth light intensity sensor 34 is 298Lx, and the light intensity difference δLx corresponding to the sixth light intensity sensor 36 is 81Lx. It can be concluded that the tea buds 9 corresponding to the reflected light corresponding to the sixth light intensity sensor 36 have a relatively large number of tea hairs, the tea buds 9 corresponding to the reflected light corresponding to the second light intensity sensor 32 have a relatively small number of tea hairs, the light corresponding to the fourth light intensity sensor 34 is mainly the direct part, which needs further detection and evaluation, and the tea hairs corresponding to the second monitoring time point are less / sparser than those corresponding to the first monitoring time point, indicating that the tenderness of the buds 9 corresponding to the first monitoring time point is better than that of the buds 9 corresponding to the second monitoring time point. At the third monitoring point, the initial light intensity Lx0 fed back by each light intensity sensor 3 is 200Lx, the light intensity Lx1 fed back by the fourth light intensity sensor 34 is 685Lx, and the light intensities fed back by the remaining light intensity sensors 3 are all within the range of 203~207Lx. Therefore, except for the light beam emitted by the light emitter 2 which directly hits the fourth light intensity sensor 34 on the opposite side and is absorbed by the tender buds 9, the light intensity differences corresponding to the remaining light intensity sensors 32 are negligible. It can be considered that the light beam emitted by the light emitter 2 is basically not reflected on the light intensity sensor, indicating that the tea hairs on the tender buds 9 have basically fallen off at this time, and the corresponding tea buds 9 have begun to age.

[0018] The scheme of the embodiment does not need to use high-precision visual terminal photography, nor does it need to use complex algorithms to evaluate image features. It only needs to use light beam reflection characteristics and light intensity difference to perform evaluation. The required light intensity sensor and light emitter are relatively low in cost, and a low-cost, fast, simple and effective means is used to evaluate the growth characteristics of living tea buds through the distribution of tea hairs. The operation process is also relatively convenient and easy to operate. The distribution of tea hairs can be quantitatively and more accurately evaluated, and the distribution of tea hairs in different growth periods can be quickly evaluated. A single evaluation takes less than ten minutes (including the time to adjust the monitoring device), and the daily changes of tea hairs can be accurately characterized by monitoring results in units of days. In the existing scheme, it usually takes no less than three hours / time to perform evaluation with the help of image recognition technology, and the image needs to be magnified dozens or even hundreds of times before the corresponding operation can be performed. Because the diameter of tea hairs is only about ten microns, the image recognition and algorithm processing involved are very troublesome and difficult.

Claims

1. A method for monitoring the growth characteristics of tea buds using photoelectric detection technology, characterized in that the steps include: Step 1, arrange the photoelectric detection device around the tender shoots to be tested and adjust the posture; The photoelectric detection device comprises a housing (1), a light emitter (2) and an incident collimator (3) are arranged on the housing (1), a plurality of independent light intensity sensors (3) are arranged on the side and opposite side of the light emitter (2), and each light intensity sensor (3) is connected to a corresponding light intensity terminal; Step 2, turning on the light intensity terminal of the photoelectric detection device to obtain the initial light intensity Lx0 fed back by each light intensity sensor (3); Step 3, turning on the light emitter (2) of the photoelectric detection device, and obtaining the light intensity Lx1 fed back by each light intensity sensor (3) again; Step 4, calculating the light intensity difference δLx corresponding to each light intensity sensor (3), δLx= Lx1- Lx0; Step 5, characterizing the distribution of tea hairs on the tea buds according to the obtained light intensity difference δLx.

2. The method according to claim 1, characterized in that: The housing (1) is cylindrical, and the light intensity sensor (3) is distributed on the housing (1) in an arc shape as a whole.

3. The method according to claim 2, characterized in that: The tea buds are tea leaves with white tea hairs on the buds.

4. The method according to claim 3, characterized in that: Carry out steps 1 to 3 described above at noon or in the afternoon on a sunny day.

5. The method according to any one of claims 1 to 4, characterized in that: The light emitted by the light emitter (2) is monochromatic red light.

6. The method according to claim 5, characterized in that: The tea photoelectric detection device further comprises a base (4), the base (4) being mounted on the rotating mechanism, a screw lifting rod mechanism (5) being arranged on the base (4), and a movable seat (6) of the screw lifting rod mechanism (5) being connected to the housing (1) via a U-shaped frame (7); and the light emitter (2) of the photoelectric detection device is adjusted to a target position by controlling the operation of the rotating mechanism and the screw lifting rod mechanism (5).

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