The Design Of Multi-sensor Water Monitoring Instrument Based On Data Fusion Technique

The monitor of water has grand significance of practice, making the water of aquaculture industry according with request of aquaculture is important assurance of enhancing quality and output of aquaculture produce. Due to the situation of our country that we have dropped far behind developed countries in this filed, and we have large population, the burden of fishery manufacture is more heavy, so making great efforts to improve the automation level in fishery manufacture is becoming the most urgent situation. Aiming at the actuality and development direction in aquaculture industry of our country, a kind of multi-parameter water monitoring instrument data fusion technique is designed in this dissertation to fit the needs of our country's aquaculture industry, which can continuously on line measure:acidity/alkalinity, dissolved oxygen, water temperature and passing the CDMA wireless communication composing wireless supervision network, carrying out the water parameter to simultaneity collecting, unify a processing, simultaneity inspecting and accurate judgment and predict forecast.This text introduces the system design of multi-parameter water monitoring instrument, mainly including hardware,the data fusion technique,software. Hardware consists of sensor signal modulation MCU,real-time clock,LCD,electrical source supervision,keyboard,switching signal,CDMA communication module, completing to function of collecting simulation data, computing of the first fusion, enacting time interval of saving, reading and deleting data.Passing introduction of the data fusion technique to the processing that is measured the parameter data, combining the water environment sample data to emphasize on the first fusion of adaptation weighted arithmetic and the second fusion of BP nerve network, from in getting to introduce the data fusion technique into monitoring instrument, it can enhance more precision of the data and carry out accurate judgment and predict forecast to the water environment.The design of software of multi-parameter water monitoring instrument includes main program,the keyboard analysis module,external subroutine,mobile terminal, carrying out the communication of multi-parameter water environment monitoring instrument and sup-equipment, consequently carrying out the function of collecting simulation data, saving data, deleting data and concentrating display.