阅读说明：本技术 热辐射式茶叶杀青机控制系统 (Heat radiation type tea leaf enzyme deactivating machine control system ) 是由 肖宏儒 宋志禹 夏先飞 梅松 丁文芹 韩余 金月 赵映 杨光 蒋青海 张健飞 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种热辐射式茶叶杀青机控制系统,包括温度采集模块、控制器、功率调节模块和第一变频器；茶叶杀青机的箱体内部设置有传动带、传送电机和发热元件,传动电机驱动传动带运动；温度采集模块测量茶叶杀青机内部温度数据t并传递至控制器；控制器将温度数据t与温度标准值t<Sub>标</Sub>进行比对：如果t<Sub>标</Sub>-t≥t<Sub>设</Sub>,t<Sub>设</Sub>为温度设定差值,则控制器通过第一变频器降低传送电机的转速,增加茶鲜叶在箱体内的停留时间,提高杀青效果。本发明的热辐射式茶叶杀青机控制系统监控传送带处的温度并根据测量结果实时调节传送带的速度,达到调节茶叶杀青温度的目的,相比于传统调节发热元件的调节方式具有更快的响应速度,提高了茶叶杀青机的温度调节效果。(The invention discloses a heat radiation type tea leaf enzyme deactivating machine control system which comprises a temperature acquisition module, a controller, a power regulation module and a first frequency converter, wherein the temperature acquisition module is connected with the controller; a transmission belt, a transmission motor and a heating element are arranged in a box body of the tea leaf enzyme deactivating machine, and the transmission motor drives the transmission belt to move; the temperature acquisition module measures internal temperature data t of the tea enzyme deactivating machine and transmits the internal temperature data t to the controller; the controller compares the temperature data t with a temperature standard value t Sign board And (3) carrying out comparison: if t is Sign board ‑t≥t Is provided with ，t Is provided with And setting a difference value for the temperature, reducing the rotating speed of the conveying motor by the controller through the first frequency converter, increasing the retention time of the fresh tea leaves in the box body, and improving the water-removing effect. The heat radiation type tea leaf enzyme deactivating machine control system monitors the temperature at the conveyor belt and adjusts the speed of the conveyor belt in real time according to the measurement result to achieve the aim of adjusting the tea leaf enzyme deactivating temperature, and has faster response compared with the traditional adjusting mode of adjusting the heating elementThe speed improves the temperature regulation effect of the tea enzyme deactivating machine.)

1. The utility model provides a heat radiation formula tea wrap control system which characterized in that: the device comprises a temperature acquisition module, a controller, a power regulation module and a first frequency converter;

a transmission belt, a transmission motor and a heating element are arranged in a box body of the tea leaf enzyme deactivating machine, and the transmission motor drives the transmission belt to move;

the temperature acquisition module measures internal temperature data t of the tea enzyme deactivating machine and transmits the internal temperature data t to the controller;

the controller compares the temperature data t with a temperature standard value t_{Sign board}And (3) carrying out comparison:

if t is_{Sign board}-t≥t_{Is provided with}，t_{Is provided with}Setting a difference value for the temperature, and reducing the rotating speed of the transmission motor by the controller through the first frequency converter; if t is_{Sign board}-t≥t_{Is provided with}The duration time of the temperature difference state exceeds the time set value s₁And the controller increases the heating power of the heating element through the power adjusting module.

2. The heat-radiating tea wrap control system of claim 1, characterized in that: the conveying belt in the box body of the tea leaf fixation machine is of a multi-section structure, and each section of conveying belt is driven by an independent conveying motor;

the temperature acquisition module measures temperature data t at each section of the transmission belt and transmits the temperature data t to the controller;

the controller compares the temperature data t at each section of the transmission belt with a corresponding temperature standard value t_{Sign board}And (3) carrying out comparison:

if t is_{Sign board}-t≥t_{Is provided with}，t_{Is provided with}Setting a difference value for the temperature, and reducing the rotating speed of the corresponding transmission motor by the controller through the first frequency converter; if t is_{Sign board}-t≥t_{Is provided with}The duration time of the temperature difference state exceeds the time set value s₁And the controller increases the heating power of the corresponding heating element through the power adjusting module.

3. The heat-radiating tea wrap control system of claim 2, characterized in that: the humidity acquisition module and the second frequency converter are also included;

the humidity acquisition module measures humidity data h at each section of the transmission belt and transmits the humidity data h to the controller;

the controller leads the humidity data h at each section of the transmission belt to be corresponding to the humidity standard value h₁And a standard value h of humidity₂And (3) carrying out comparison:

if h is more than or equal to h₁Or h is more than or equal to h₂And the duration exceeds the time set value s₂And the controller improves the rotating speed of the dehumidification fan of the tea water-removing machine through the second frequency converter.

4. The heat-radiating tea wrap control system of claim 3, characterized in that: the temperature data and the humidity data are displayed by the controller through the display, and the temperature standard value, the humidity standard value and the time set value input by a user are acquired by the controller through the interactive equipment.

5. The heat-radiating tea wrap control system of claim 3, characterized in that: and a PID control program is installed in the controller, and the controller controls the power regulation module, the first frequency converter and the second frequency converter through the PID control program.

6. The heat-radiating tea wrap control system of claim 3, characterized in that: the first frequency converter and the second frequency converter are both PWM type frequency converters.

7. The heat-radiating tea wrap control system of claim 3, characterized in that: the controller compares the temperature data t at each section of the transmission belt with a corresponding temperature standard value t_{Sign board}And (3) carrying out comparison:

if t-t_{Sign board}≥t_{Is provided with}If t is a temperature setting difference value, the controller increases the rotating speed of the corresponding transmission motor through the first frequency converter; if t-t_{Sign board}≥t_{Is provided with}The duration of the temperature difference state exceeds the time set value s₁And the controller reduces the heating power of the corresponding heating element through the power regulating module.

Technical Field

The invention relates to the field of agricultural machinery, in particular to a control system of a thermal radiation type tea fixation machine.

Background

The tea fixation is one of the processing procedures of various kinds of tea such as green tea, yellow tea, oolong tea and the like, and mainly utilizes high temperature to evaporate water in fresh leaves, so that the tea is softened and is convenient to knead and form, and the formation of tea aroma is promoted. In the current year, most tea manufacturing enterprises use the fixation machine to make tea, wherein one of the commonly used fixation machines is a heat radiation type fixation machine, which mainly comprises a conveyor belt and a box body, wherein a heating element (such as a heating pipe) is arranged in the box body, the conveyor belt conveys fresh tea leaves to pass through the box body, and the fixation of the fresh tea leaves is realized in a high-temperature environment in the box body.

One of the keys of tea fixation is the temperature, for example, fresh tea leaves with one bud and one leaf type and without dew should be fixed in the environment of about 150 ℃; however, the initial moisture content of the fresh tea leaves is not uniform, the flow condition of the water vapor evaporated from the tea leaves in the box body is also relatively complex, and the conditions easily cause the temperature in the box body to be non-uniform or unstable. The method for overcoming the defect in the prior art is to regulate and control the temperature, and specifically, the method comprises the steps of measuring the temperature in a box body by using a sensor and then correspondingly regulating the power of a heating pipe. The method has the disadvantages of slow response, longer time difference from increasing and reducing the power of the heating pipe to the actual change of the temperature in the box body, further unsatisfactory fixation effect of partial tea leaves after fixation of the same batch of tea leaves, water stuffiness phenomenon, red stem and red leaf phenomenon and the like.

Disclosure of Invention

The invention aims to solve the technical problem of providing a novel thermal radiation type tea leaf fixation machine control system, and overcoming the defect that the response speed of the traditional fixation machine for temperature control is slow.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a heat radiation type tea leaf enzyme deactivating machine control system comprises a temperature acquisition module, a controller, a power regulation module and a first frequency converter;

a transmission belt, a transmission motor and a heating element are arranged in a box body of the tea leaf enzyme deactivating machine, and the transmission motor drives the transmission belt to move; in order to better adjust the heating capacity, the heating element can adopt a far infrared heat radiation generator, and the conveyor belt is used for conveying fresh tea leaves to pass through the box body of the fixation machine;

the temperature acquisition module measures internal temperature data t of the tea enzyme deactivating machine and transmits the internal temperature data t to the controller;

the controller compares the temperature data t with a temperature standard value t_{Sign board}And (3) carrying out comparison:

if t is_{Sign board}-t≥t_{Is provided with}，t_{Is provided with}Setting a difference value for the temperature, which means that the tea water-removing temperature is too low (in most cases, the water content of fresh tea leaves is increased), and then the controller reduces the rotating speed of the conveying motor through the first frequency converter, so that the retention time of the fresh tea leaves in the box body is increased, and the water-removing effect is improved; if t is_{Sign board}-t≥t_{Is provided with}The duration time of the temperature difference state exceeds the time set value s₁This means that it is still difficult to achieve the desired speed simply by reducing the speed of the conveyor beltAnd (5) the water-removing temperature, and the controller improves the heating power of the heating element through the power adjusting module.

Furthermore, the conveying belt in the box body of the tea leaf enzyme deactivating machine is of a multi-section structure, and each section of the conveying belt is driven by an independent conveying motor; in general, the conveyor belt adopts a three-section structure and comprises a primary section conveyor belt, a middle section conveyor belt and a final section conveyor belt, wherein the temperature of the middle section conveyor belt is highest, the temperature of the primary section conveyor belt is second, and the temperature of the final section conveyor belt is lowest;

the temperature acquisition module measures temperature data t at each section of the transmission belt and transmits the temperature data t to the controller;

the controller compares the temperature data t at each section of the transmission belt with a corresponding temperature standard value tstart:

if t is_{Sign board}-t≥t_{Is provided with}，t_{Is provided with}Setting a difference value for the temperature, and reducing the rotating speed of the corresponding transmission motor by the controller through the first frequency converter; if t is_{Sign board}-t≥t_{Is provided with}The duration time of the temperature difference state exceeds the time set value s₁The controller increases the heating power of the corresponding heating element through the power adjusting module; the temperature of the multi-segment conveyor belt is adjusted individually for each segment.

Further, the heat radiation type tea water-removing machine control system also comprises a humidity acquisition module and a second frequency converter;

the humidity acquisition module measures humidity data h at each section of the transmission belt and transmits the humidity data h to the controller;

the controller leads the humidity data h at each section of the transmission belt to be corresponding to the humidity standard value h₁And a standard value h of humidity₂And (3) carrying out comparison:

if h is more than or equal to h₁Or h is more than or equal to h₂And the duration exceeds the time set value s₂And the controller improves the rotating speed of the dehumidification fan of the tea water-removing machine through the second frequency converter. For the fixation machine, the humidity in the box body has great influence on the temperature, if the humidity exceeds a certain range, the temperature adjusting means fails, and therefore the control system monitors the humidity in the box body of the fixation machine simultaneously and avoids overlarge humidity.

Furthermore, the heat radiation type tea leaf enzyme deactivating machine control system further comprises a display and an interactive device, the controller displays the temperature data and the humidity data through the display (generally, the temperature data and the humidity data are displayed in a temperature curve and a humidity curve mode), and the controller obtains a temperature standard value, a humidity standard value and a time set value input by a user through the interactive device.

Furthermore, a PID control program is installed in the controller, and the controller controls the power adjusting module, the first frequency converter and the second frequency converter through the PID control program.

Further, the first frequency converter and the second frequency converter are both PWM type frequency converters.

Further, the controller compares the temperature data t at each section of the transmission belt with a corresponding temperature standard value t_{Sign board}And (3) carrying out comparison:

if t-t_{Sign board}≥t_{Is provided with}，t_{Is provided with}Setting a difference value for the temperature, which means that the temperature at the conveyor belt is too high, and at the moment, the controller increases the rotating speed of the corresponding conveying motor through the first frequency converter to increase the speed of the conveyor belt; if t-t_{Sign board}≥t_{Is provided with}The duration of the temperature difference state exceeds the time set value s₁And the controller reduces the heating power of the corresponding heating element through the power regulating module.

Has the advantages that: (1) the heat radiation type tea water-removing machine control system monitors the temperature at the conveyor belt and adjusts the speed of the conveyor belt in real time according to the measurement result, so that the purpose of adjusting the tea water-removing temperature is achieved. (2) The heat radiation type tea water-removing machine control system further adjusts the heating element under the condition that the effect of adjusting the water-removing temperature by using the conveyor belt is insufficient, and the double means are matched to improve the temperature adjusting capability of the water-removing machine. (3) The heat radiation type tea leaf fixation machine control system divides the conveyor belt into a multi-section structure, independently controls the temperature of each section of the conveyor belt, refines the tea leaf fixation process and improves the tea leaf fixation effect. (4) The heat radiation type tea water-removing machine control system monitors the humidity in the box body, automatically controls the power of the dehumidifying fan, avoids the influence of overlarge humidity in the box body on temperature regulation, and ensures the stable operation of the tea water-removing machine.

Drawings

FIG. 1 is a schematic view showing the structure of a conveyor belt of the tea wrap in example 1.

Fig. 2 is a block diagram of a control system of the heat radiation type tea water-removing machine in the embodiment 1.

FIG. 3 is a control flow chart of a control system of the heat radiation type tea water-removing machine in the embodiment 1.

Fig. 4 is a control schematic diagram of a control system of the heat radiation type tea water-removing machine in the embodiment 1.

FIG. 5 is a human-machine interface diagram of a control system of the thermal radiation type tea water-removing machine in the embodiment 1.

FIG. 6 is an interface diagram of parameters of a control system of the thermal radiation type tea water-removing machine in the embodiment 1.

Fig. 7 is a temperature and humidity graph of the first type of tea fixation in example 1.

Fig. 8 is a parameter curve chart of the first type tea fixation in the embodiment 1.

Fig. 9 is a temperature and humidity graph of the second type of tea fixation in example 1.

Fig. 10 is a parameter curve chart of the second type tea fixation in the embodiment 1.

Fig. 11 is a temperature and humidity graph of the third type of tea fixation in example 1.

FIG. 12 is a graph of the parameters of the third type of tea fixation in example 1.

Fig. 13 is a temperature and humidity graph of the fourth type of tea fixation in example 1.

FIG. 14 is a graph of the parameters of the fourth type of tea fixation in example 1.

Wherein: 1. a primary conveyor belt; 2. a middle conveyor belt; 3. a final conveyor belt.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.