涡流栅位移传感器绝对定位可靠性算法

摘要

为了提高涡流栅位移传感器绝对定位的可靠性，利用编码码道信号之间互补关系，提出了一种新型的编码码道码字识别算法，即三类码字识别算法，该算法可将编码码道归一化误差限提高到依0.1。在此基础上，对归一化误差曲线经过有选择性的最小二乘法拟合，可将归一化误差进一步降低至依0.05。实验证明该方法可以满足码字识别算法的要求，采用该技术的涡流栅位移传感器确保了绝对定位的可靠性，提高了传感器的稳定性。%In order to improve the reliability of the absolute-position about grating eddy-current position sensor,three types code word recognition algorithm is proposed and increases the error limit to ±0.1 , through using the complementary relationship of the signal. After using the least square method on the normalized error curve, the errors can be decreased to ±0 . 05 . The experiments proof that the method completely meet requirements of the code word recognition algorithm. And the grating eddy-current position sensor,adopting the technology,could ensure not only the reliability of the absolute-position,but also the stability of the sensor.