Real-time wire-break detection method and system for digital incremental encoder

The invention provides real-time wire-bream detection method and system for a digital incremental encoder. The method comprises the following steps of: converting A-phase, B-phase and Z-phase differential signals into A-phase, B-phase and Z-phase single-ended signals; judging whether the A-phase single-ended signal and the B-phase single-ended signal have wire break according to the physical property of orthogonal pulse maintained by the A-phase single-ended signal and the B-phase single-ended signal; judging whether the Z-phase single-ended signal has wire break according to the property that the mechanical angle of the Z-phase single-ended signal pulse is fixed; and outputting a fault state according to the judgment result. The invention provides real-time wire-bream detection method and system for a digital incremental encoder, which ensures real-time and high-precision monitoring.