Design of on-line PH monitoring system based on ZigBee technology

摘要

The pH of water is very important to human health and aquatic products breeding. Traditional PH detection technology cannot meet the requirements of real-time, dynamic and efficient monitoring, this paper designs an on-line PH monitoring system based on ZigBee technology. The system is based on the ZigBee protocol, using the SoC chip CC2530 which is completely compatible with protocol 2007 and manufactured by the TI company, DHT11 temperature and humidity sensor and the PH composite electrode, for real-time acquisition and monitoring of PH value. System also uses a linear regression algorithm to deal with PH value, in order to reduce the influence of temperature on PH measurement precision. Comparative measurement datum after processing show that we eliminate the influence of temperature on the PH monitoring with temperature compensation model.