Design and Experimental Study of Heating Device for Ground Wind Sensor
When the weather phenomena occur in winter,such as rain and snow,freezing rain,glaze and rime,the rotating parts of the wind sensor of the automatic weather station are easy to freeze,resulting in the lack of wind direction and speed observation data.In order to solve the problem of freezing of the wind sensor,a wind sensor heating device based on the hierarchical heating technology was designed,which adopts the combined control of multi-stage heating elements to realize the adaptive starting of different levels of heating modes.By testing the performance of the wind sensor heating device and processing and analyzing the observed data of wind direction and speed,the feasibility of the application of the wind sensor heating device in the meteorological observation business was evaluated.The results show that the wind sensor with heating device plays a good role in anti freezing and operation is more stable.The wind direction and speed data integrity of the wind sensor with heating device was better than that of the wind sensor without heating device.The two wind speeds have strong correlation and correlation coefficients was above 95％.The consistency of wind direction between the two was significant and both of them were above 80％,and the consistency of wind direction in 10 min was better than that in 2 min.It could be seen that the wind sensor heating device can not only effectively reduce the number of freezing occurrences of the wind sensor and timely eliminate the icing layer,but also reduce the workload of the observer's equipment maintenance,improve the stability of the operation of the wind sensor and the continuity of the data,thus providing decision support for the application of the wind sensor heating device to the meteorological observation business.
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