In this paper, a digital servo controlling chip LM628, based on DSP technique, is introduced; a position servo controller card with STD Bus is designed by using LM628, with the feedback from an incremental encoder, this card can be used to realize real time digital servo control of high preci- sion.
All these three control loops are regulated by the method of PID. In practice, we use Elmo servo controller, Moxon brushless DC servo motor, incremental encoder, Hall sensors, planetary gear heads, RS232 and computer.
19 figure incremental mode optical shaft angle encoder is used in GJ 341 small remote control optical electronic theodolite. Its accuracy is enough in terms of theory.
A friction loaded cycle ergometer was instrumented with a strain gauge and an incremental encoder to obtain accurate measurement of human mechanical work output during the acceleration phase of a cycling sprint.
Both systems employ an optical incremental encoder and both contain two feedback loops: a minor closed-loop (MCL) feeding back a step angle signal and a major closed-loop for position feedback.
In this paper, a digital servo controlling chip LM628, based on DSP technique, is introduced; a position servo controller card with STD Bus is designed by using LM628, with the feedback from an incremental encoder, this card can be used to realize real time digital servo control of high preci- sion.
The quadrupler direction judging interface by using incremental optical encoder in automatic measuring systems are discussed. The output signal and the position detecting principle of the encoder are presented. The absolute position measuring circuit and its interface with the computer are introduced.
The principle of a photo-electronic length measuring instrument is introduced.The instrument is an incremental encoder:grating forming the More stripe;the digital measurement is carried out by photo-electronic transformation and digital readout.