Numerical control machine tool operation state monitoring system based on digital twinning

The invention discloses a numerical control machine tool operation state monitoring system based on digital twinning, which relates to the field of numerical control machine tools and comprises an operation state data acquisition module, a data processing module, a twinning equipment construction module and an operation state judgment module. Whether the acquired operation state data of the to-be-monitored numerical control machine tool is abnormal or not is judged, when the operation process data is judged to be abnormal, the operation state of a sensor data acquisition sub-module for acquiring the abnormal operation process data is judged, and when the operation state of the sensor data acquisition sub-module is judged to be normal, the abnormal operation process data is acquired. Calculating the difference degree De of the operation process time sequence data di at different sampling moments, constructing an operation process data prediction model when the operation state of the sensor data acquisition sub