Anti-tearing device for calculating width of conveying belt through radar ranging and anti-tearing method of anti-tearing device

The anti-tearing device for calculating the width of the conveying belt through radar ranging comprises a conveying belt support, supporting frames are symmetrically arranged on the two sides of the conveying belt support, monitoring mechanism adjusting supports are arranged at the upper ends of the supporting frames, and the free ends of the monitoring mechanism adjusting supports are rotationally connected with radar monitoring mechanisms through hinges; the adjusting module is used for adjusting the radar irradiation direction of the conveying belt, namely adjusting the ranging direction of the radar; the method comprises the following steps: calculating the distance between an adhesive tape edge and a measurement point according to an adhesive tape edge reflection condition by transmitting a fixed-frequency radar; meanwhile, the actual detection width of the adhesive tape is calculated according to feedback information of a radar monitoring mechanism, whether tearing occurs or not is found by comparing th