便携式近地表风速廓线仪的研制

摘要

土壤风蚀是我国北方干旱、半干旱以及部分半湿润地区土地退化的主要原因之一，风是引起土壤风蚀的最直接动力，对土壤风蚀的研究需要测量大气边界层近地表的风速廓线。为此，针对现有的风速廓线仪在野外测试中存在的缺陷和不足，研制出了针对土壤风蚀测试的便携式近地表风速廓线仪。该廓线仪采用了抗风沙的楔形热膜风速传感器，采用低功耗的无线网络数据传输方案。经过风洞校准和野外的测试试验，证明研制的风速廓线仪携带方便、抗风沙能力强，能够精确地测量近地表的风速廓线。%Wind is the most direct power to cause soil erosion , and wind erosion is one of the main reasons of arid and semi-arid land degradation as well as part of the semi-humid areas in north China .For better study of wind erosion , near-surface wind profile of the atmospheric boundary layer must be accurately measured .In this paper , due to the shortcomings and deficiencies of the existing wind profilers in the field test , a portable near-surface wind profiler was de-veloped for wind erosion test .What's more , the anti-sand wedge hot-film wind speed sensor and a low-power wireless network data transmission method are designed in the profiler .After calibration in wind tunnel , the field tests prove that the wind profiler is portable , anti-sand ability , capable of accurate measurement of the near-surface wind profile .