Research On Multi-Gas Monitoring And Data Fusion In Aquaculture Environment Based On Ad Hoc Networks

The development of science and technology is changing with each passing day,people's living standards have been improved greatly,and the idea of a green and healthy diet has been deeply rooted in the hearts of the people,with the development of wireless sensor network technology,to a certain extent,the field of large-scale and intensive traditional aquaculture environment monitoring has been developed in the direction of information and network.The toxic gases such as CO,H₂S,NH₃ and SO₂ produced in livestock and poultry houses threaten the health of livestock and poultry,and also affect the quality of meat products,and common gas sensors are greatly influenced by cross interference in mixed gases,poor selectivity,resulted in large measurement errors.Based on the analysis of domestic and foreign farms environmental monitoring technology,Zig Bee ad hoc network technology and data fusion technology,combined with actual needs,designed an ad hoc network system and an alarm system for the gas monitoring of the farm environment.This article takes chicken house as an example,analyzes the main environmental factors that affect its growth,and applies toxic gas CO,H₂S and NH₃ as monitoring objects,and applies Zig Bee ad hoc network technology to the environmental monitoring system of farms,the system consists of three parts:the detection terminal,the ad hoc network system and the monitoring center.The detection terminal is composed of the sensor module,the data transmission module and the power supply module,which is responsible for the collection and transmission of the environmental data;the wireless sensor network is designed by tree network topology,it is composed of coordinator node,router node and sensor node,and completes data transmission of nodes in the environment;the monitoring center takes STM32F107 as the core processor,the peripheral circuit including the data receiving module circuit and the GSM alarm module circuit,which is mainly responsible for receiving the data which sent from the detection terminal,and processing,judging and sending;in order to improve the data true and reliable,the classic data fusion algorithm and modern data fusion algorithm are used to analyze and compare the transmitted data on the MATLAB7.0platform,finally,the optimal data fusion algorithm is obtained,and put the algorithm into the data processing module of STM32 single chip microcomputer to fuse the received data,after the data fusion algorithm of hand delivered by way of serial communication to the PC interface for display and storage,on the other hand through the microprocessor to determine whether exceeds the threshold,if exceeds,to send SMS alarm module,SMS alarm start.Finally,the network reliability test is carried out.The test shows that when the router node is added to the network,the data communication distance is increased from original 30 m to 70 m when the transmission data is not lost,and the network is stable and reliable.The environmental monitoring and alarm system designed in this paper meets the design requirements and has a good application prospect.