Describe the principle of multi-point soil temperature and humidity recorder

Soil moisture plays an important role in the growth of crops and water-saving irrigation. The multi-point soil temperature and humidity recorder can control the distribution of soil moisture (water content) through the GPS positioning system and provide scientific data for differentiating water-saving irrigation. The basis for accurate water supply is also conducive to improving crop yield and quality. How does a multi-point soil temperature and humidity recorder achieve these functions? In fact, it is very simple. It emits electromagnetic waves of a certain frequency. Electromagnetic waves travel along the probe and return to the bottom. The voltage output from the probe is detected. Because the change in the dielectric constant of the soil depends on the moisture content of the soil, the relationship between the output voltage and moisture is The soil moisture content can be calculated.

Ordinary multi-point soil temperature and humidity recorder directly measured soil moisture and temperature values, there is a data storage function, stored directly on the host. It can directly measure the soil moisture and temperature, and can record the time and moisture and temperature data of each sampling during the measurement in real time, and can be connected with a computer to export the data. The software has a storage and printing function (software giveaway), which can be The computer analyzes the moisture distribution.