Deep well hoisting device state monitoring system and method based on signal fusion

The invention provides a deep well hoisting device state monitoring system and method based on signal fusion. The system comprises a strain measuring subsystem, a main shaft encoder, a hoisting sheave rotating speed measuring subsystem and a tension measuring subsystem; the strain measuring subsystem is arranged on a main shaft, and measures the torque of the main shaft; the hoisting sheave rotating speed measuring subsystem is attached to a hoisting sheave through a spring supporting structure, and measures the real-time rotating speed of the hoisting sheave; the tension measuring subsystem is arranged on a tension balancing device, and measures the tension of a main hoisting steel wire rope; and the subsystems of the monitoring system transmit acquired signals into an industrial personal computer after calibrating the system timestamps on the acquired signals. The state monitoring method based on signal fusion can separate fault signals from a mixed monitoring signal, and signal fluctuation caused by accele