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为了提高测角分辨力,缩小码盘尺寸,并克服传统图像式编码器译码速度慢等缺点,提出了一种单圈绝对式高分辨力编码技术。通过分析码盘刻线与分辨力之间的关系,提出了绝对式单圈移位码编码方法;采用准直光源照射和线阵图像探测器识别的方法实现单圈码盘的译码方式;根据所提出的方法,设计了高分辨力码盘及译码电路。实验采用直径38mm、刻划有10位编码的单圈码道,成功实现了10位编码的译码。该编码方式较传统采用面阵图像探测器的编码方法具有更快的响应频率。
In order to improve the resolving power of angular measurement, reduce the size of code wheel and overcome the disadvantages of traditional image-based coder such as slow decoding speed, a single-turn absolute high-resolution encoding technique is proposed. By analyzing the relation between the reticle reticle and resolution, an encoding method of absolute single-circle shift code is proposed. The decoding method of single-circle reticle is achieved by collimated light source illumination and line image detector identification. According to the proposed method, a high-resolution encoder and decoder circuit are designed. Experiments using a diameter of 38mm, scored a 10-bit encoding lap yard, the successful realization of the 10-bit encoding decoding. The encoding method has the faster response frequency than the conventional encoding method using the area image detector.