Ogami Yoshifumi, Murakita Naoya, Fukudome Koji
Department of Mechanical Engineering, College of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577, Japan.
Murata Manufacturing Co., Ltd., Kyoto 617-8555, Japan.
Sensors (Basel). 2017 Nov 14;17(11):2618. doi: 10.3390/s17112618.
The sensor response has been reported to become highly nonlinear when the acceleration added to a thermal accelerator is very large, so the same response can be observed for two accelerations with different magnitudes and opposite signs. Some papers have reported the frequency response for the horizontal acceleration to be a first-order system, while others have reported it to be a second-order system. The response for the vertical acceleration has not been studied. In this study, computational experiments were performed to examine the step and frequency responses of a three-axis thermal accelerometer. The results showed that monitoring the temperatures at two positions and making use of cross-axis sensitivity allow a unique acceleration to be determined even when the range of the vertical acceleration is very large (e.g., -10,000-10,000 g). The frequency response was proven to be a second-order system for horizontal acceleration and a third-order system for vertical acceleration.
据报道，当施加到热加速度计上的加速度非常大时，传感器响应会变得高度非线性，因此对于大小不同且符号相反的两个加速度，可以观察到相同的响应。一些论文报道水平加速度的频率响应为一阶系统，而另一些论文则报道为二阶系统。垂直加速度的响应尚未得到研究。在本研究中，进行了计算实验以检验三轴热加速度计的阶跃响应和频率响应。结果表明，即使垂直加速度的范围非常大（例如，-10000 - 10000g），通过监测两个位置的温度并利用交叉轴灵敏度也可以确定唯一的加速度。事实证明，水平加速度的频率响应为二阶系统，垂直加速度的频率响应为三阶系统。
