Trial manufacture of an inscribed 240 polyhedron type dynamic atmospheric pressure sensor in the planetary boundary layer

表面有小突起和孔洞的空心球体通过测量风力作为动态压力传感器，并通过修改内部压力作为参考压力传感器。在球体表面，每个凸起的中心有361个孔，按照内嵌240个多面体的122个顶点(其中一个用于导电管)和240个三角形重心的几何位置均匀排列，利用内压的全方性和对风向变化的阻力，成功地将均匀穿孔的中空球体的内压分解为接近风效应和参考大气压力。球体尺寸与湍流长度的300倍尺度比保持准稳态，因此可以在风洞中均匀流动来测量压力系数和阻力系数。虽然该装置在测量拖拉力方面存在小缺陷，但在水平动压和长时间的限制条件下工作良好。在哥本哈根召开的第10届国际风工程会议上发表了这项研究的结果，题目是《关于参考压力探测器和自然风中的现场数据实例》。

A hollow globe with small protuberances and holes on the surface acts as a dynamic pressure sensor by measuring the wind force and does as a reference pressure sensor by modifing the intenal pressure. On the surface of globe there are 361 holes at the center of each protuberance which is evenly arranged in accordance with the geometric position of the 122 vertexes (including one for conducting tube) and the 240 triangle gravity centers of the inscribed 240 polyhedron.The internal pressure of the hollow globe evenly perforated was successfully divided into the approaching wind effect and the reference atmospheric pressure, utilizing the omnidirectionality for the internal pressure and the drag force against wind direction change. The 300 times scale ratio of the globe size to the length scale of turbulence kept a quasi-steady state, and so a uniform stream in a wind tunnel was available to measuring the pressure and drag coefficients. Although the apparatus had a small defect for the measurement of the drag force, it worked well under the limited conditions of the horizontal dynamic pressure and a long duration of time. It was found that the reference pressure fluctuation during several minutes was often stronger in the test field than that of the wind pressure.The result of the research is presented at the 10 th International Conference on Wind Engineering held in Copenhagen with the title "On a reference pressure detecter and an example of field data in a natural wind".