Self-powered Water Quality Monitoring Key Technologies Of Wireless Sensor Network Node, Multi-parameter

For the application of water quality monitoring in large lake aquaculture area,and the application of wireless sensor network monitoring system for real-time and large area layout monitoring features,the paper studied and completed key technologies of multi-parameters and sustainable real-time wireless sensor network nodes.Designed sensor monitoring nodes and gateway nodes for the wireless network, and designed the hardware and interface driven for the two nodes. Then, make the simulation test about the interface-driven. The results show that the driven chip can work properly and the data can be real-time reception and conversion.Detected weak signal in strong noise background based on chaotic algorithm, and put forward a new method to detect weak signal with dual mutual-constraint chaotic oscillator, and the method is validated by simulation and analysis, which shows that the anti-noise performance ability of the new algorithm is better, and can estimate the signal frequency, improve the node capability of monitoring weak water quality signal in harsh environment.Study of new solar power instead of dry battery for monitoring sensor node power in wireless sensor network monitoring system, and simulated and analyzed the designed power and make the PCB board. New solar power can supply a stable voltage that required, and can make the sensor nodes steady worked in large area of water for a long time, which enhance the practicability of nodes.Study of new scenery complementary power supply instead of the dry battery or accumulator for gateway node with large energy consumption, designed and simulated the new power. Scenery complementary power supply to the gateway node in a large area of the external environment of power, improving the automation testing efficiency and node action range, reduces the artificial cost.According to the above, with these key technologies, we can achieve water quality through monitoring multi-parameters weak signal of wireless sensor network nodes and self power supply, which is suitable for water monitoring in large area.