Author(s)

Fu Xiuwei

Corresponding Author

Fu Xiuwei

Abstract

With the rapid development of computer, electronics, machinery, communication and other technologies, MCU has been widely used in agriculture. Based on the dielectric characteristics of air and the difference between fertilizers and dielectric properties, the capacitance detection circuit is set up by using single chip microcomputer and capacitance conversion chip. The differential capacitance sensor is effectively used to obtain the output micro capacitance signal. The system can detect the flow rate of fertilizer on line and achieve high accuracy variable fertilization.

Keywords

Fertilizer, STC89C52RC, Ultrasonic