摘要
在数字化转台伺服系统中,常用的位置传感器是光电轴角编码器。传统的位置测量系统,是通过对其莫尔条纹的细分,及对精粗码的校正,来达到高精度位置测量的要求。本文提出了一种新型的细分方法,它充分利用TMS320LF2407A运算速度快、处理数据能力强的优点,通过对计数器内数据的计算,达到了对电机运转过程中实时位置测量的目的,其测量精度(即最小分辨率)由所选DSP的运算速度决定。该方法避免了机械上对精码的刻划、电子学上对精粗码校正及A/D转换等误差对细分结果的影响。实践证明该方法简单、便于操作、可移植性好,对编码器技术指标的提高具有较强的实用价值。
In the digital servo system, the common position sensor is the encoder. In the traditional position measurement system, the high -precision position measurement demand can be achieved by the in- terpolation to Moiré fringe and emendation to the extractive and coarse signal. A new interpolation Method was proposed in the paper. This method applied the charouteristic of TMS320DLF2407A, such as the fast operation speed, the strong data＇ processing capacity. The method can obtain the higher precision position measurement result by calculating the different counter value. And the smallest resolving power is decided by the operation speed of DSP. The method can avoid many error influences to the interpolation result, such as the scoring error to the extractive signal in machine, the emendation error to the extractive and coarse signal in electronics, and the A/D conversion error, and etc. Analysis indicated that the method was briefness, easy to operate and easy to amend. This method has high utility value to advance the technology target of the encoder.
出处
《长春理工大学学报（自然科学版）》
2007年第2期47-50,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
4S:emens传感器终检项目横项合作项目
