A rapid moisture detection device for tea processing

Abstract

The present invention relates to a rapid moisture detection device in a tea processing process, and belongs to the field of moisture detection. The present invention uses a sliding unit to drive a laser wave emitting unit to move, and the laser wave emitting unit can also receive echoes reflected by tea leaves on the production line while emitting laser waves. Then, a host computer is used to determine the moisture content of tea leaves on the processing production line based on the emitted laser waves and the received echoes, thereby realizing rapid, non-destructive and high-throughput detection of the moisture content of tea leaves.

Description

Technical Field

[0001] The invention relates to the technical field of moisture detection, in particular to a device for rapid moisture detection in a tea processing process. Background Art

[0002] Tea products are made from fresh tea leaves through a series of physical and chemical changes. The processing steps of green tea include withering, rolling and drying. In these processing steps, the moisture content directly affects the physical state of the raw materials and the progress of chemical reactions, and is a key factor in the formation of tea quality. Taking the withering process as an example, the key technology of withering is to determine the withering time and temperature according to the moisture content of the leaves. At present, the accurate measurement of the moisture content of tea leaves is based on the drying and weighing method. This method takes a long time to measure, at least 1 to 2 hours, and the high-temperature drying process destroys the nutritional components of the tea leaves, making the test samples inedible, and cannot meet the needs of real-time detection of the tea processing process. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a device for rapid moisture detection in a tea processing process.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A rapid moisture detection device for tea processing, comprising: a laser wave emitting unit, a sliding unit and a host computer;

[0006] The sliding unit is arranged on one side of the conveyor belt of the tea processing production line; the laser wave emitting unit is arranged on the sliding unit; the laser wave emitting unit is electrically connected to the upper computer;

[0007] The sliding unit is used to drive the laser wave emitting unit to move; the laser wave emitting unit is used to emit laser waves and to receive echoes reflected by tea leaves on the production line; the host computer is used to determine the moisture content of tea leaves on the processing production line based on the laser waves and the echoes.

[0008] Preferably, the laser wave emitting unit comprises: a planar array solid-state laser radar and a bracket;

[0009] The bracket is arranged on the sliding unit; the area array solid-state laser radar is installed on the bracket; and the area array solid-state laser radar is electrically connected to the host computer.

[0010] Preferably, the sliding unit comprises: a slide rail, a control motor and a driving screw rod;

[0011] The control motor is connected to the driving screw rod; the bracket is installed on the driving screw rod; the control motor is used to drive the driving screw rod, and the driving screw rod is used to drive the bracket to slide on the slide rail.

[0012] Preferably, the sliding unit further comprises: a screw fixing seat; the screw fixing seat is used to limit the displacement distance of the driving screw.

[0013] Preferably, the wavelength of the laser emitted by the planar array solid-state laser radar is a near-infrared wavelength.

[0014] Preferably, the host computer obtains the echo data of tea leaves on the production line; the echo data includes first echo data and second echo data; the first echo data is the echo data obtained when the area array solid-state laser radar moves synchronously with the conveyor belt for a period of time; the second echo data is the echo data obtained when the area array solid-state laser radar moves relative to the conveyor belt for a period of time;

[0015] The host computer removes clutter in the echo data based on the Doppler effect, and determines the moisture content of the tea leaves based on the echo data after clutter removal and the laser wave data emitted by the planar array solid-state laser radar.

[0016] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0017] The device for rapid moisture detection in the tea processing process provided by the present invention adopts a sliding unit to drive the laser wave emitting unit to move. The laser wave emitting unit can also receive the echo reflected by the tea leaves on the production line while emitting laser waves. Then, the upper computer is used to determine the moisture content of the tea leaves on the processing production line based on the emitted laser waves and the received echoes, thereby realizing rapid, non-destructive and high-throughput detection of the moisture content of the tea leaves. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the device for rapid moisture detection in the tea processing process provided by the present invention;

[0020] Figure 2 A schematic diagram of a waveform of an echo received when a radar provided by an embodiment of the present invention moves synchronously with a conveyor belt;

[0021] Figure 3A schematic diagram of the waveform of the echo received when the radar and the conveyor belt are in relative motion provided by an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1-area array solid-state laser radar, 2-bracket, 3-conveyor belt, 4-control motor, 5-slide rail, 6-driving screw, 7-screw fixing seat. DETAILED DESCRIPTION

[0024] 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 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.

[0025] The purpose of the present invention is to provide a device for rapid detection of moisture content in a tea processing process, which can rapidly, non-destructively and with high throughput detect the moisture content of tea leaves in the current processing procedure.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The invention provides a device for rapid detection of moisture in tea processing, comprising a laser wave emitting unit, a sliding unit and a host computer.

[0028] The sliding unit is arranged on one side of the conveyor belt 3 of the tea processing production line. The laser wave emitting unit is arranged on the sliding unit. The laser wave emitting unit is electrically connected to the upper computer.

[0029] The sliding unit is used to drive the laser wave emitting unit to move. The laser wave emitting unit is used to emit laser waves and to receive echoes reflected by tea leaves on the production line. The host computer is used to determine the moisture content of tea leaves on the processing production line based on the laser waves and the echoes.

[0030] In order to further improve the accuracy of determining the moisture content of tea leaves, in the present invention, the laser wave emitting unit used above can be specifically configured to include a planar solid-state laser radar 1 and a bracket 2, such as Figure 1 shown.

[0031] The bracket 2 is arranged on the sliding unit. The planar array solid-state laser radar 1 is installed on the bracket 2. The planar array solid-state laser radar 1 is electrically connected to the upper machine. The wavelength of the laser emitted by the planar array solid-state laser radar 1 is a near-infrared wavelength.

[0032] Among them, Figure 1 As shown, the sliding unit includes: a slide rail 5, a control motor 4 and a driving screw 6.

[0033] The control motor 4 is connected to the driving screw 6. The bracket 2 is mounted on the driving screw 6. The control motor 4 is used to drive the screw 6, and the driving screw 6 is used to drive the bracket 2 to slide on the slide rail 5.

[0034] In order to further optimize the solution, a screw rod fixing seat 7 is also provided in the sliding unit. The screw rod fixing seat 7 is used to limit the displacement distance of the driving screw rod 6.

[0035] In the process of determining the moisture content, the host computer obtains the echo data of the tea leaves on the production line. The echo data includes the first echo data and the second echo data. The first echo data is the echo data obtained after the planar array solid-state laser radar 1 and the conveyor belt 3 move synchronously for a period of time. The second echo data is the echo data obtained after the planar array solid-state laser radar 1 and the conveyor belt 3 move relative to each other for a period of time.

[0036] The host computer removes clutter from the echo data based on the Doppler effect, and determines the moisture content of the tea leaves based on the echo data after clutter removal and the laser wave data emitted by the planar array solid-state laser radar 1.

[0037] Below Figure 1 The positional relationship between the sliding unit and the conveyor belt shown in the figure is used to illustrate the specific working process of the tea processing moisture rapid detection device provided above. In the actual application process, Figure 1 The installation method shown is not the only limitation to the structure of the device for rapid detection of moisture in tea processing provided by the present invention.

[0038] In this embodiment, a planar array solid-state laser radar 1 is installed at a variable angle within a certain range in the space above the conveyor belt 3 of the tea processing production line, and a slide rail 5 is installed on the side of the conveyor belt 3 so that it can move a certain distance in the same direction as the conveyor belt 3. During the detection process, laser waves are emitted to the tea leaves on the conveyor belt 3, and echoes reflected by the tested tea leaves are received. Since the laser used is light of near-infrared wavelength, the characteristic that light in the near-infrared band is easily absorbed by water molecules can be used to obtain the relative moisture content through the received echo intensity. A small echo signal intensity indicates a high moisture content, and a large received echo intensity indicates a low moisture content.

[0039] However, due to the continuous characteristics of the tea processing production line, the conveyor belt 3 cannot be stopped for detection, and continuous and accurate detection must be achieved at the same time. Therefore, in this embodiment, the slide rail 5 on the side of the conveyor belt 3 is used to allow the area array solid-state laser radar 1 and the conveyor belt 3 to move synchronously for a distance. At this time, the relative speed between the area array solid-state laser radar 1 and the detected tea is zero. In the absence of relative movement, the radar echo intensity data of the detected tea is obtained as follows: Figure 2 shown.

[0040] In addition, due to many factors such as the material of the conveyor belt 3 and the irregularity of the tea leaves, more clutter will be generated. By utilizing the law of random and unstable appearance of clutter, when the area array solid-state laser radar 1 and the conveyor belt 3 move at the same speed for a distance and then stop moving, the tea leaves being detected on the conveyor belt 3 will move relative to the area array solid-state laser radar 1. At this time, the Doppler effect of the echo data can be used to well remove the irregular reflection echoes generated by clutter that do not conform to this characteristic, such as Figure 3 As shown. In this embodiment, the Doppler effect refers to the relative motion between the area array solid-state laser radar and the tea leaves, the signal waveform will be compressed or broadened, and the reflected echo of the area array solid-state laser radar will produce a frequency shift, and the shift is proportional to the relative radial velocity between the scatterer and the area array solid-state laser radar.

[0041] After removing the clutter, the high-frequency operation of the area array solid-state laser radar can be used to achieve fast, non-destructive and accurate detection of moisture content in the tea production process.

[0042] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0043] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A rapid moisture detection device for tea processing, characterized in that: include: Laser wave emitting unit, sliding unit and host computer; The sliding unit is arranged on one side of the conveyor belt of the tea processing production line; the laser wave emitting unit is arranged on the sliding unit; the laser wave emitting unit is electrically connected to the upper computer; The sliding unit is used to drive the laser wave emitting unit to move; the laser wave emitting unit is used to emit laser waves and to receive echoes reflected by the tea leaves on the production line; the host computer is used to determine the moisture content of the tea leaves on the processing production line based on the laser waves and the echoes; The laser wave emitting unit comprises: a planar solid-state laser radar and a bracket; The bracket is arranged on the sliding unit; the planar array solid-state laser radar is installed on the bracket; the planar array solid-state laser radar is electrically connected to the host computer; The host computer obtains the echo data of tea leaves on the production line; the echo data includes first echo data and second echo data; the first echo data is the echo data obtained when the area array solid-state laser radar moves synchronously with the conveyor belt for a period of time; the second echo data is the echo data obtained when the area array solid-state laser radar moves relative to the conveyor belt for a period of time; The host computer removes clutter in the echo data based on the Doppler effect, and determines the moisture content of the tea leaves based on the echo data after clutter removal and the laser wave data emitted by the planar array solid-state laser radar.

2. The tea processing moisture rapid detection device according to claim 1, characterized in that: The sliding unit comprises: a slide rail, a control motor and a driving screw rod; The control motor is connected to the driving screw rod; the bracket is installed on the driving screw rod; the control motor is used to drive the driving screw rod, and the driving screw rod is used to drive the bracket to slide on the slide rail.

3. The tea processing moisture rapid detection device according to claim 2 is characterized in that: The sliding unit further comprises: a screw rod fixing seat; the screw rod fixing seat is used to limit the displacement distance of the driving screw rod.

4. The rapid detection device for moisture in tea processing according to claim 1, characterized in that: The wavelength of the laser emitted by the planar array solid-state laser radar is a near-infrared wavelength.

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