Dendrobium officinale growing environment intelligent monitoring system based on PLC

Abstract

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 operation reliability and security; in addition, an expansion interface is reserved, thereby laying a foundation for dendrobium officinale growing scale enlargement and control equipment expansion.

Description

technical field [0001] The patent of the present invention relates to an intelligent monitoring system, in particular to a PLC-based intelligent monitoring system for the growth environment of Dendrobium candidum. Background technique [0002] Dendrobium officinale is a perennial epiphytic herbaceous plant in the family Orchidaceae, which is very demanding on the growth environment and climatic conditions. It needs to grow at an altitude of 800 to 1600 meters, with a relative humidity of 60%-75%, a forest light transmittance of about 60%, a growing season temperature of 20-25°C, a night temperature of 10-13°C, and a temperature difference between day and night at 10°C. -15°C, the best frost-free period is 250-300 days, and the annual rainfall is 1100-1500 mm. Therefore, real-time and accurate monitoring and control of environmental parameters such as temperature, humidity, and light intensity are crucial during the growth of Dendrobium candidum. However, the current resear...

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Problems solved by technology

However, the current research on Dendrobium candidum mainly focuses on the fields of chemical composition and pharmacological effects, artificial cultivation technology, development and

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