Design Of Wind Measurement And Recorder Based On Pneumatic MEMS Sensor

In grid micro-meteorological studies,wind is the first element that affects the safety of overhead transmission lines,so it is important to obtain wind data for grid maintenance.There is a large amount of literature showing that the wind speed,flow pattern and wind direction can have an impact on the wire line dance.The literature shows that it is easier to produce line dance when the wind speed is 4m/s?20m/s and the wind direction is at an angle of 45° to the wire line.The current stage of the power grid micro-meteorological measurement system has the disadvantages of high price and maintenance cost and complex system.In view of the above disadvantages,this paper researches and analyzes the micro-meteorological measurement,data storage and communication,and sensor development perspectives,proposes a method to measure wind power based on wind pressure,and designs a set of measurement nodes based on this principle,and conducts experimental verification of the feasibility of the measurement nodes.The feasibility experiments of the designed wind measurement node were conducted in this project,using the productized wind cup type wind speed sensor.The experimental results show that the wind measurement node designed in this project is accurate under wind speed greater than 6m/s(soft breeze)conditions and the error does not exceed 1.5m/s,which can meet the requirements for use in stronger wind conditions.The wind direction measurement is also accurate,and the data of the measurement node can be stored for a long time,and no data loss occurs when data communication is carried out,and the farthest wireless communication distance can reach 25m-30 m,which can meet the situation that the wind measurement node is placed on the top of the power grid tower or the top of the power pole for use.In the experiment,it was found that the sampling port of the sampling device has a certain influence on the accuracy of the collected data,and an experimental study was conducted to address this phenomenon.The results show that the aperture wall thickness,length and material of the sampling port will have an impact on the data collection.The paper concludes with a summary of the research and an outlook for the future research.In this paper,the designed measurement node is described in detail in terms of both hardware circuit and software development.It provides a new idea to reduce the cost of wind measurement for grid micro-meteorological wind measurement research and provides some data support for wind measurement based on wind pressure.