【摘要】 光栅形成的莫尔条纹,在位移测量和控制中获得了广泛应用。本文介绍莫尔条纹乘法倍频细分的原理、实现电路、细分效果、主要特点和误差分析。该方法与蔡司光电正余弦(Phocosin)相比较,在原理上不会因倍频处理而附加新的高次谐波,因而可以用在运动速度较高的场合。除此之外,尚有细分精度高、线路简单等优点。更多还原

【Abstract】 The method of generating moire fringe by means of gratings hasfound wide use in the measurment and control of the displacement.This paperdescribes the principle,circuits,results,advantages and error analysis of thefrequency multiplication of the moire fringe using analog multipliers.Comparingwith the frequency multiplication method adopted in the Zeiss Phocosin System,the present method adds no new high_order harmonics in the frequency multipli_cared signals in process of the frequency multiplication.Therefore it should beapplicable to situations of high speed movement.Besides,the present methodis of high accuracy,of simpler circuits.Examples of circuits for 64,128 and256 frequency multiplication subdivition are given.更多还原