Field-crop-growing-land trickle irrigation automatic control system based on RS485 bus

The invention discloses a field-crop-growing-land trickle irrigation automatic control system based on an RS485 bus. The field-crop-growing-land trickle irrigation automatic control system comprises an upper computer, an RS232-RS485 conversion module, a wireless 485 module, a data acquisition system, a liquid level sensor, a pressure sensor, a flow sensor, a temperature-humidity sensor, a frequency converter and an electromagnetic valve. The upper computer is connected with the RS232-RS485 conversion module, the RS232-RS485 conversion module is connected with the wireless 485 module, the wireless 485 module is connected with the data acquisition system, the data acquisition system is connected with the frequency converter and the electromagnetic valve, and the liquid level sensor, the pressure sensor, the flow sensor and the temperature-humidity sensor are all connected with the data acquisition system. The field-crop-growing-land trickle irrigation automatic control system eliminates the troublesome caused by wiring of a traditional wired control system, reduces the power consumption, improves the stability and the interference resistant capacity and greatly reduces the engineering cost.