Department of Mechanical Engineering, College of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu 525-8577, Japan.
Sensors (Basel). 2023 Jun 1;23(11):5265. doi: 10.3390/s23115265.
Cross-axis sensitivity is generally undesirable, and lower values are required for the accurate performance of a thermal accelerometer. In this study, errors in devices are utilized to simultaneously measure two physical quantities of an unmanned aerial vehicle (UAV) in the X-, Y-, and Z-directions, i.e., where three accelerations and three rotations can also be simultaneously measured using a single motion sensor. The 3D structures of thermal accelerometers were designed and simulated in a FEM simulator using commercially available FLUENT 18.2 software Obtained temperature responses were correlated with input physical quantities, and a graphical relationship was created between peak temperature values and input accelerations and rotations. Using this graphical representation, any values of acceleration from 1 to 4 and rotational speed from 200 to 1000°/s can be simultaneously measured in all three directions.
交叉轴灵敏度通常是不希望的，需要较低的值才能实现热加速度计的精确性能。在这项研究中，利用设备中的误差，同时测量无人机 (UAV) 在 X、Y 和 Z 方向上的两个物理量，即使用单个运动传感器也可以同时测量三个加速度和三个旋转。使用商业上可用的 FLUENT 18.2 软件在 FEM 模拟器中设计和模拟了热加速度计的 3D 结构。获得的温度响应与输入物理量相关联，并创建了峰值温度值与输入加速度和旋转之间的图形关系。使用这种图形表示，可以同时在所有三个方向上测量 1 到 4 的任何加速度值和 200 到 1000°/s 的旋转速度。
