I. Overview

With the popularization of greenhouse technology, the number of greenhouses is constantly increasing. For vegetable greenhouses, an important management factor is temperature and humidity control. If the temperature and humidity are too low, vegetables will freeze to death or stop growing, so it is necessary to always control the temperature and humidity within a range suitable for vegetable growth. The traditional temperature control is to hang a thermometer inside the greenhouse, and workers adjust the temperature inside the greenhouse based on the temperature value read. If relying solely on manual control is labor-intensive and prone to errors. Temperature control in greenhouses has become a challenge. Nowadays, with the increase in the scale of the agricultural industry, traditional temperature control measures have shown significant limitations for a large number of greenhouses.

Therefore, in modern vegetable greenhouse management, there is usually an automatic temperature and humidity control system to control the temperature of the vegetable greenhouse and meet production needs. It uses advanced technology and modern facilities to artificially control the environmental conditions for crop growth, so that crop growth is not affected by natural climate, achieving year-round factory production with high efficiency, high output value, and high benefits.

The vegetable greenhouse temperature and humidity monitoring system developed by Mulan in Suzhou is an intelligent monitoring system specifically designed for vegetable planting greenhouses, which can automatically monitor indoor temperature and humidity. This solution combines the characteristics of vegetable cultivation greenhouses and uses temperature and humidity sensors to overcome the serious shortcomings of traditional analog temperature and humidity sensors, such as instability, large errors, susceptibility to interference, and the need for regular calibration. This product has accurate measurement data, high accuracy, stable operation, and reliable quality, and has broad application prospects in vegetable greenhouses.

2、 Composition and working principle

Place ML-T220 temperature and humidity sensing electronic tags and corresponding card reading devices produced by Mulan Company in the vegetable greenhouse. The tag will continuously send the collected temperature and humidity information, such as the temperature and humidity in the vegetable greenhouse, to the outside through wireless means. This way, the card reader installed nearby can receive this information and transmit it to the host of the management center. If the current temperature and humidity in the greenhouse are not conducive to vegetable growth, the host will output multiple alarms according to the user's instructions to remind the greenhouse administrator to take corresponding actions, thereby achieving intelligent management of vegetables in plastic greenhouses.

After the installation of the monitoring system, operators can operate the heating and ventilation equipment inside the greenhouse based on real-time temperature and humidity data from sensors, effectively solving the disadvantages of high operating costs and energy consumption in modern intelligent connected greenhouses. The monitoring system can also set alarm values based on the growth conditions of vegetables. When the temperature and humidity are abnormal, an alarm will be triggered to remind staff to pay attention. This system is waterproof and dustproof, and can operate for a long time in high-temperature and high humidity environments such as greenhouses. And wireless transmission technology is adopted to ensure stable signal transmission in multi steel structure buildings such as greenhouses.