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在随动跟踪和自动控制系统中,越来越多地采用光栅作为检测元件。但是,由于普通的光栅装置把机械量(如角位移、线位移等)转换为电的模拟量时,是以增量座标形式进行的,一旦停电、停机、中断运行,必然导致前面的结果废弃,无法继续进行工作。因此,就有必要设计一种特殊记忆装置,以便满足停电记忆、工作过程中寻找基准点、增量座标与绝对座标兼容、修正误差等的需要。也就是使光栅在工作过程中能提供一个绝对零点,
In follow-up tracking and automatic control systems, more and more use of grating as a detection element. However, since ordinary grating devices convert mechanical quantities (such as angular displacement, linear displacement, etc.) into analog quantities of electricity in incremental coordinates, once a power failure, shutdown, or interruption of operation will inevitably lead to the previous results Abandoned, unable to continue working. Therefore, it is necessary to design a special memory device in order to meet the power outage memory, find the benchmark during the work process, incremental coordinates and absolute coordinates compatible with the need to correct errors. Which is to enable the grating in the work process can provide an absolute zero,