Dendrobium officinale growing environment intelligent monitoring system based on PLC

The invention relates to a dendrobium officinale growing environment intelligent monitoring system based on a PLC (Programmable logic Controller), comprising a data acquisition unit, an execution mechanism, a PLC unit and a configuration unit. The PLC unit is a core controller. The configuration unit comprises a PC and configuration software which are used as a monitoring module, and perform communication with the PLC unit through a serial port. The data acquisition unit is in connection with the PLC unit through an A/D converter. The PLC unit is in connection with the execution mechanism. The data acquisition unit comprises a temperature sensor, a humidity sensor, a CO2 concentration sensor and an illumination sensor. The execution mechanism comprises a fan system, a spraying system, an air-conditioning system, a CO2 compensator, an LED light source, a fluorescent lamp system and an alarm system. The control system realizes common control of a plurality of sub systems, and meanwhile guarantees system operati