Novel interpolation method for quadrature encoder square signals
Novel interpolation method for quadrature encoder square signals
复制标题
正交编码器方波信号插值新方法
DOI：
10.1109/isie.2009.5213217
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Tsung
中科院分区：
文献类型：
--
作者：
Ming;Y. Kung;Yi;Tsung
本文提出了一种新的，但简单的插补算法的设计和现场可编程门阵列（FPGA）实现的增量编码器的分辨率提高了64倍。采用频率无关移相（FIPS）电路将A、B通道的方波信号移相一定的电角度。这些延迟信号通过简单的逻辑异或函数来执行，以产生具有通道A的64倍频率的一对新的平方信号。与传统方法相比，该算法具有不需要任何模数转换器（ADC）、电阻或运算放大器等器件，不依赖于电机的工作频率和速度，不需要输入方波信号等优点。最后通过实验结果和误差分析验证了该算法的有效性。
The paper presents a design and implementation of a novel but simple interpolation algorithm by a field programmable gate array (FPGA) to raise resolution of an incremental encoder by sixty-four times. A frequency-independent phase shift (FIPS) circuit is employed to shift the square-waveform signals of channels A and B by some specified electric angles. These delayed signals are performed by simple logic exclusive-or function to generate a pair of new squared signals with 64-fold frequency of channel A. As compared with conventional methods, the algorithm provides many merits, such as square-waveform instead of sinusoidal signals being required, independence of and applicable to any operating frequency/velocity of motors, without need of any analog-to-digital converter (ADC), resistor, or operational amplifier. Finally, the effectiveness of the proposed algorithm will be demonstrated through the experimental results and error analysis.