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本文提出了一种新的莫尔条纹数字化细分技术 ,即采用新的数字信号处理方法 ,利用 CPU的信号处理能力 ,将读数头输出的两路正弦信号经过硬件辩向电路形成每四分之一周期的正反转中断信号 ,并在中断服务程序中进行角度的加减运算 ,实现莫尔条纹的四细分。同时对这两路信号进行新的构建 ,通过 CPU及 A/ D转换器 ,采用软件编程的方法形成一三角波线性函数 ,并采用新颖的细分算法进行二十细分 ,最终实现莫尔条纹的八十细分 ,角度测量的分辨力可达 1
This paper presents a new Moiré fringe digital subdivision technology, that is, the use of new digital signal processing methods, the use of CPU signal processing capabilities, the first two-channel output of the digital signal through the hardware defense circuit to form a quarter of a quarter A cycle of positive and negative interrupt signal, and in the interrupt service routine to add or subtract the angle of operation, to achieve Moore stripes four subdivision. At the same time, a new construction of these two signals is carried out. A triangular wave function is formed by software programming using CPU and A / D converter, and the new subdivision algorithm is used to make twenty subdivisions, and finally the moiré fringe Eighty subdivisions, the angle measurement of resolution up to 1