Abstract:

At present, the decentralized monitor mode was adopted by most dissolved oxygen monitoring systems in the recirculating aquaculture. It could not realized integrated monitoring using the data of multiple monitoring nodes. To aim at this question, the dissolved oxygen online monitoring system was designed. The system adopted collective and distributive control model, and it had four levels: the end nodes, the route nodes, the gateway node and the monitoring center. The end nodes collected the dissolved oxygen in the pond, then sent data to the route nodes, and control the aerator based on the value of dissolved oxygen. The gateway node gathers data from all end nodes, then sent them to the monitoring center. It received the control commands and controlled the aerator by the end nodes. The monitoring center saved data and made statistic analysis for the data and came into being controlling command. ZigBee nodes adopted CC2430 as the key component. The communication between wireless network nodes was realized using ZigBee2006 protocol stack. Experiment has shown that the system the system is stable and reliable and it can be deployed flexibility and easily expanded. It met the requirement of the recirculating aquaculture. It realized the real time online monitoring to the dissolved oxygen and effective control of the aerator, and the breeding cost was decreased.