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首页> 外文期刊>Sensors Journal, IEEE >Spherical Wind Sensor for the Atmosphere of Mars
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Spherical Wind Sensor for the Atmosphere of Mars

机译：用于火星大气的球形风传感器

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摘要

A novel wind speed and direction sensor designed for the atmosphere of Mars is described. It is based on a spherical shell divided into four triangular sectors according to the central projection of tetrahedron onto the surface of the unit sphere. Each sector is individually controlled to be heated above the ambient temperature independently of the wind velocity and incidence angle. A convection heat rate model of four hot spherical triangles under forced wind has been built with finite element method thermal-fluidic simulations. The angular sensitivity of the tetrahedral sphere structure has been theoretically determined and compared with the tessellation of the sphere by four biangles. A 9-mm-diameter prototype has been assembled using 3-D printing of the spherical shell housing in the interior commercial platinum resistors connected to an extension of a custom design printed board. Measurements in Martianlike atmosphere demonstrate sensor responsiveness to the flow in the velocity range 1–13 m/s at 10-mBar CO pressure. Numerical modelization of the sensor behavior allows to devise an inverse algorithm to retrieve the wind direction data from the raw measurements of the power delivered to each spherical sector. The functionality of the inverse algorithm is also demonstrated.
机译：描述了一种为火星大气设计的新型风速和风向传感器。它基于球形外壳，根据四面体在单位球面上的中心投影，球形外壳分为四个三角形扇区。独立地控制每个扇区以使其独立于风速和入射角而被加热到环境温度以上。利用有限元方法的热流模拟，建立了在强迫风作用下四个热球形三角形的对流热速率模型。从理论上已经确定了四面体球结构的角灵敏度，并通过四个三角形将其与棋盘格细分进行了比较。直径为9毫米的原型通过在内部商用铂电阻器中球形外壳的3D打印来组装，该铂电阻连接到定制设计印刷板的扩展部分。在类似火星的大气中进行的测量表明，在10 mBar CO压力下，传感器对流速在1–13 m / s的速度范围内具有响应性。传感器行为的数值建模允许设计一种逆算法，以从传递给每个球形扇区的功率的原始测量值中检索风向数据。还演示了逆算法的功能。

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