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How to automate the tea drying line? Temperature sensor applications

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Source:Doweston
2023-03-14 Back List

To realize the intelligentization of tea drying control equipment, the following steps and equipment are required:

Install temperature and humidity sensors: Install temperature and humidity sensors in the drying room to monitor the temperature and humidity of the drying room in real time.

Control system: Use a modern control system to achieve intelligent control. The control system needs to obtain data through temperature and humidity sensors, process and analyze it. Common control systems include microcontroller control systems, PLC control systems, computer control systems, etc.

Fan controller: In order to ensure air circulation and uniform temperature during the drying process, a fan controller needs to be installed. The fan controller can control the speed and direction of the fan and obtain data from the temperature and humidity sensor for adjustment.

Heater: In order to ensure a constant temperature during the drying process, a heater needs to be installed. The heater can be controlled by a control system to adjust the heater power and temperature.

Humidity controller: In order to ensure constant humidity during the drying process, a humidity controller needs to be installed. The humidity controller can be controlled by the control system to adjust the humidity of the humidity controller and the power of the humidifier.

Conveyor belt: In order to ensure the uniformity of tea leaves during the drying process, a conveyor belt needs to be installed. The conveyor belt can control the speed and direction of the tea leaves and adjust it by obtaining data from temperature and humidity sensors.


The sensors that need to be installed are:

Temperature and humidity sensor: used to measure the temperature and humidity of the drying room.

Humidity sensor: used to measure humidity during drying.

Thermistor Sensor: Used to measure the temperature of the heater.

Wind speed sensor: used to measure the wind speed of the fan.

Infrared sensor: used to measure the temperature of tea leaves.

In short, through intelligent tea drying control equipment, constant temperature, constant humidity and uniform drying process can be achieved, improving the quality and production efficiency of tea.


Moisture content analyzers and dew point meters are two instruments commonly used for air humidity testing. They can help us better understand the air humidity and thus better control the drying process.


A moisture content analyzer is an instrument used to measure the moisture content in the air. Its principle is based on chemical reactions to measure moisture content. This instrument can measure the moisture content in the air with high precision and display the results in the form of moisture content. During the tea drying process, the moisture content analyzer can help us promptly grasp the changes in moisture content in the air, and make corresponding adjustments based on the test results to ensure the quality and taste of the tea during the drying process.

A dew point meter is an instrument used to measure the dew point of air. Its principle is to condense the moisture in the air by lowering the temperature, thereby measuring the dew point temperature. This instrument can quickly and accurately measure the moisture content in the air and display the results in the form of dew point temperature. During the tea drying process, the dew point meter can help us determine whether the moisture content in the air is too high, and whether measures such as humidification or cooling are needed to adjust the air humidity, thereby ensuring the stability of the drying process and the quality of the tea.

In summary, both the moisture content analyzer and the dew point meter have important application value in the tea drying process. They can help us better understand the air humidity during the drying process and make corresponding adjustments based on the test results to ensure the quality and taste of the tea.


To realize the intelligence of the tea drying control system, a modern control system can be used, in which temperature and humidity control can be achieved using a PID digital display control table.

PID control is a common control method, which includes proportional control, integral control and differential control. The PID controller can analyze and process the input temperature and humidity data, and output control signals to adjust the temperature and humidity of the drying system to achieve constant temperature and humidity drying of tea.


The specific plans are as follows:

Use temperature and humidity sensors to obtain temperature and humidity data in the drying room in real time.

The data collected by the sensor is input into the PID controller for processing and analysis.

According to the output signal of the PID controller, a digital display control table is used to control equipment such as heaters, humidifiers, and dehumidifiers to achieve constant temperature and humidity drying of tea.

The required sensors are as follows:

Temperature sensor: used to detect the temperature in the drying room in real time.

Humidity sensor: used to detect the humidity in the drying room in real time.

PID controller: used to process and analyze the temperature and humidity data collected by the sensor, and output control signals.


The automation of the tea drying line is a complex process, and the following aspects need to be paid attention to:

Equipment selection: It is necessary to select drying equipment suitable for automated control, such as equipment with PLC control systems, sensors, touch screen operations and other functions to facilitate automated control.

Data collection: Sensors such as temperature and humidity sensors and current sensors need to be installed on the tea drying line to collect various data in the drying process in real time and transmit the data to the control center for processing.

Control strategy: A control strategy needs to be formulated based on real-time collected data, such as automatically adjusting the operating status of heaters, humidifiers, ventilators and other equipment according to changes in temperature and humidity to achieve constant temperature and humidity drying of tea.

Automated control system: It is necessary to design a complete automated control system, including PLC controller, touch screen operation interface, data acquisition and processing module, control logic, etc., to realize automated control of the tea drying line.

Safety guarantee: Safety guarantee issues need to be considered in the automated control system. For example, multiple safety switches need to be set up to ensure the safety of personnel, and the operation of the equipment can be stopped in time in an emergency.

Maintenance and maintenance: In the process of automating the tea drying line, it is necessary to consider the maintenance and upkeep of the equipment, clean the equipment in time, replace damaged parts, etc., to ensure the normal operation of the equipment.


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