In order to solve the problem of bag filter leak detection and location in the industry of cement production ndustry,a method for detecting and locating the broken bag based on fiber-optic distributed vibration sensing is proposed.Weak vibration signal can be detected as soon as dust air flows into the broken bag because of the high ensitivity of the vibration sensing system,and thus whether the bag is broken can be judged.A simulation is arried out,and the weak leak signal caused by dust air can been ident...