一种简单的计算机零位光栅设计方法

光栅扭矩传感器采用零位光栅提供绝对零位信号，以防止掉电时数据出错。在零位光栅设计过程中，采用了阈值法，即采用计算机随机产生栅线序列，经计算通过阈值判断以获得所需要的零位栅线序列。该方法可以大大减小编程的复杂性及难度，减小编程量，同时保证设计结果具有光通量大和对比度高的特点，并能满足实际应用的需要。

A simple computer design of zero position grating

In order to prevent from data fault during power failure, grating torque sensor provides absolute zero position signal with zero position grating. Threshold method is adopted during design process of zero position grating, i.e, grating line sequence is randomly produced by a computer and the desired zero position grating line sequence is obtained through threshold judgment by computer. The method can greatly reduce programming complexity, difficulty and programming work. At the same time the method guarantees that the design has the properties of large light flux and high contrast, and the designed zero position grating can fulfill the demands in practical applications.