In order to solve the problem of uncertainty of information from the ultrasonic wave sensor in the process of sensing environment and noise in the localization procedure

Pioneer 3-AT robot is used as experimental platform

probabilistic algorithms are used to solve the uncertain relationships between the object itself and between the objects

the intrinsic connection between the various algorithms is sorted

and related analysis and research on localization algorithms of mobile robot are carried out.Some experiments have been carried out in self-built site global map on the Mobilesim platform.Experimental results show that the mobile robot using modified Monte-Carlo algorithm has good positioning effect

and can meet practical requirements.