Method and system for real-time subdivision and equant averaging of signals of multiple reading heads of circular grating

The invention discloses a method and a system for real-time subdivision and equant averaging of signals of multiple reading heads of a circular grating. Relates to the technical field of displacement sensing. After synchronous acquisition and data processing are carried out on each digital quantity signal, a result signal is output in a TTL pulse form, and a technical approach is provided for online application of a multi-reading-head equally-divided average algorithm; equant averaging of any number of reading heads can be realized, and equant averaging processing of 2N reading head signals is not limited; the circular grating multi-reading-head signal real-time subdivision and equal-division averaging system and the motor servo control system are mutually independent, and data acquired by the plurality of reading heads are subjected to data processing through the circular grating multi-reading-head signal real-time subdivision and equal-division averaging system and then are input into the motor servo contro