This paper introduces a electronic processing method for high-precision goniometer.This goniometer
which is made of four scanning heads and five 8031-single-chip microcomputers
can process signals from the four heads.It’s capable of collecting data
8192-portion dividing(corresponding to the resolution of 1/8192 of the grating pitch)
combining accurate codes with the coast codes and displaying.The errors of the measured angle
due to the axle awaying and eccentric of the grating disc
is eli-minated by the summation of the digital signals from the four scanning heads.It is convenient for mechanical mounting and adjusting.The resolution of the goniometer is higher than 0.01 arc second.