Rolling diameter measuring method, device and system and computer medium

The invention discloses a winding diameter measuring method, device and system and a computer medium, and relates to the technical field of winding machines. The method comprises the following steps: determining a predicted winding diameter value of the winding machine according to a first tape running total length and a tape running thickness of the winding machine at the current moment, and in a preset angle interval value of rotation of a motor, slipping an encoder to make the tape running length measured in the preset angle interval value be relatively low; therefore, the error of the real-time roll diameter value obtained within the preset angle interval value relative to the predicted roll diameter value is large, the actual thickness of the tape is possibly smaller than or larger than the tape thickness obtained through measurement in actual application, the predicted roll diameter value is influenced, but the real-time roll diameter value is not influenced, and the current roll diameter value obtained