This control system takes the AT89C52 microcomputer as its core to realize its onlineclosedloop.
该系统以at89c 52单片机为核心，实现系统的在线闭环控制。
2
An electric line of force is also a closedline; it too forms a loop and returns on itself.
电力线也是一条封闭线；它形成一个圈，返回原处。
3
The system had many features such as high speed, high accuracy, untouched measuring and closed-loop control. The system is used on-line measuring and control of diameter measure.