Design Of Data Acquisition System For Radar Water Level Sensor

This paper mainly introduces the construction of marine water level observation system based on radar liquid level sensor.This paper first introduces the phenomenon of ocean tides,and introduces the significance of tide observation for economic construction and natural disaster prevention.This paper introduces the measuring principle of common tide level observation technology and its advantages and disadvantages.The principle of radar level measurement and the feasibility of applying radar level measurement technology to ocean tide monitoring are mainly introduced.Based on the STM32F103 processor of ST company,this paper designs a type of radar water level data acquisition device.The acquisition,processing and storage of water level data obtained by radar level sensor are mainly realized.The compatibility problems caused by different interface modes of radar water level sensors are considered.The error correction of water level observation data and noise processing are considered.The reliability of the system is taken into account and corresponding measures are taken to deal with it.In the hardware circuit design part,the circuit design of the radar water level data acquisition device based on the STM32F103 processor was completed,and the design work of various radar liquid level sensor interface circuits was completed.The main implementation of SDI-12,RS-232/RS-485,Analog 4-20 mA hardware electrical interface.The frame structure of SDI-12 bus protocol and the implementation method in this system are mainly introduced.In the software design part,this paper studies the performance characteristics and operating mechanism of the embedded operating system ?C/OS-?.Completed the ?C/OS-? transplant on the processor STM32F103.Combined with the advantages of the C/OS-? system and the performance requirements of the observation system,the software operation mode of the system is designed.Completed a variety of sensor interface program and other functional module program design.Based on the practical experience of multi-year water level observation and the characteristics of radar level sensor itself,the noise elimination method of ocean tide observation data was studied,and solutions to different types of noise were proposed.The method of combination of measurement verification and field test is adopted to verify the effectiveness and reliability of the system,and the actual effect of the corresponding filtering method of the corresponding tidal level data is tested.