Development Of Control System For Wind Lidar And Wind Field Observation

Accurate atmospheric wind field information has become an important influencing factor in the theoretical research of atmospheric science,wind farm performance assessment,aerospace safety,early warning of dangerous weather,and environmental monitoring.Wind measurement lidar mainly includes two methods:direct detection and coherent detection.It has the irreplaceable advantages of other wind field detection methods in measurement range and accuracy.With the development of lidar technology and the continuous exploration of applications in different fields,the automation of various functions in the wind measurement lidar control system,the integration of different component equipment,the intelligence of fault detection and judgment,and the processing of measurement data results And display also face higher requirements.Therefore,the research and development of wind lidar control system has important practical significance.In order to uniformly dispatch,control,and manage each part of the hardware in the wind lidar system,it is necessary to connect each part of the hardware to an industrial control machine,and then install the programed system control software on this industrial control computer to perform different equipment sending instructions,receiving data,etc.The control software is written in a computer language C++.This is because the language has the advantages of high-quality programs,good portability,and good code maintenance.The program is developed under the Visual Studio 2013 platform and the interface window of the program is realized by introducing the Microsoft Foundation Classes(MFC).System users can implement system operation and parameter settings through the function buttons and options provided on the window.In addition,the program's real-time processing and display of the collected data also facilitates the system user to observe the measurement results and debug the equipment hardware.The signal collection of incoherent wind lidar is divided into photon counter and analog acquisition,which are used to collect optical signals of different intensities.In order to meet different acquisition timings of different devices,a gate control card based on FPGA chip is designed.The gate control card can set the level of the output waveform,and the time precision of the waveform setting reaches 10 ns.The real-time data processing of coherent wind lidar has the problems of large amount of calculation and large data throughput,which requires special high-performance hardware to achieve real-time processing.This paper introduces the method of programming multi-core DPS for data processing and the method of using FPGA for data processing.Two data processing methods have their own advantages and disadvantages,which can be adopted according to different needs...