| 2. | Firstly , the outputs of the infrared sensors are analog signals , which can be disturbed by noise in optical path and circuit . it has a low precision and stability when using traditional signal processing method , so in this paper a novel spectrum analysis method based on the fft is discussed and some methods are taken to rectify errors from the limitation of the fft
首先,由于红外传感器的光电转换在光路和电路中都会受到噪声的影响,针对采用传统信号处理方法带来的测量精度低、可靠性差这一问题,本文采用快速傅立叶变换和周期图法的经典谱分析方法对传感器信号进行处理,并对产生的误差进行了分析和校正。 |
