本文基于PIC 16f874单片机，介绍了一种低成本、实用性强并提供RS - 232串口输出的高精度同步机角度编码器。
A synchronous motor Angle encoder with low cost, high practicality and RS-232 serial output interface based on PIC16F874 MCU is introduced in the paper.
为了满足某些运动系统对转速测量高精度的要求，本文提出了虚拟编码器的设计方法。
In order to satisfy the requirement of high accuracy rotation speed measurement in moving systems, the concept of virtual coder has been put forward.
与传统绝对式光学编码器相比，码盘直径小、光学图案简单，有利于绝对式编码器实现小型化和提高精度。
The serial encoding method can reduce the diameter of the code disk and simplify the optical pattern, in favour of miniaturization and high precision of the absolute encoder.
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