| Soil wind erosion is an important factor in land degradation in arid and semiarid regions of northern China.The wind speed profile is one of the main test instruments for studying.soil wind erosion.At present,the wind speed profiler has achieved the acquisition of wind speed at different height for the study of soil wind erosion,but almost all of them need a large number of line connections and all are single direction,which can affect the accuracy and reliability of the measurement results.Therefore,we need integrated the wireless sensor technology,computer technology and electronic information technology,designed with HFP-8 near surface wind speed profiler based on 433MHz technology,which has the function of wireless ad-hoc network and automatic alignment of wind direction,realizing the environment Wind speed of the temperature and humidity,atmospheric pressure and wind speed profile of the wind erosion data's in real time measurement.Before the application,the wind speed sensor is used to calibrate the wind tunnel.The least squares method was used to fit 3,and curve fitting is more than 0.995.Secondly,the HFP-8 near-surface wind speed profiler was experimentally verified in the OFDY-1.2 portable wind erosion wind tunnel of the Inner Mongolia Agricultural University.The results show that the fitting degree of the fitting curve is above 0.9,which can accurately reflect the exponential distribution in the vertical direction of near-surface wind speed.Finally,according to the problem of soil wind erosion in Siziwangqi Inner Mongolia,the HFP-8 near-surface wind speed profiler was experimentally verified by field experiment in natural grassland,shrub grassland and traditional cropland.The results show that the near-surface wind speed profile of different surfaces is consistent with the exponential distribution.The surface roughness was reduced and the anti wind erosion ability was decreased in shrub grassland,natural grassland and traditional cropland. |
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