Angle-length conversion device and method of rotary encoder

The invention provides an angle-length conversion device and method of a rotary encoder. The angle-length conversion device of the rotary encoder comprises an encoder, a PLC and a touch screen, the encoder is installed on a bearing seat of a steel wire rope reel of a crane and is in communication connection with the PLC, and the PLC is in communication connection with the touch screen; a visual button and a visual input and output frame are preset on an interface of the touch screen, and a linear conversion module for converting the angle and the length of the encoder is loaded in the PLC, anda button address storage area associated with the visual button and an input and output address storage area associated with the visual input and output frame are arranged in the linear conversion module. According to the angle-length conversion device and method, the visual touch screen is associated with the PLC to detect the position of hoisting equipment in real time for real-time dynamic adjustment, the visualizatio