Research Bidirectional Search Path Of GPS-Based

For children,the elderly wandered off to this serious social phenomenon,many corresponding prevention lost products are made,such as bracelets,watches.To a certain extent,these products help people know the old person,child safety situation in real time.People can deal with the dangerous situation of the elderly and children in a timely manner.Under the impetus of the mobile Internet technology,the application of GPS service system and the widespread use of mobile terminals such as mobile phones,more lost prevention system design and development provides a new direction.First,this article analyses the importance of the prevention lost products,and then further study of the prevention lost system.This article mainly from the aspects of system function and performance analysis of system limitation and put forward the corresponding optimization measures.Now,the mainly limitations of the prevention lost system have two aspects.The first is the positioning of the distance and the second is need to further improve the accuracy.For the two aspects problem,this article provides three solutions to optimize the system.Optimization methods are following:1)improve the function of the system and optimize the system has some guidance function.Prevention system in the guardian wandered off to find by guardian's behavior,the system will provide a path for the guardian to guide the guardian found by guardian.Improved the function of the system after the system will not only provide a path for the guardian also will provide the same path to be the guardian,and you can voice instructions by guardian should be how to move forward along the path.So the two sides can meet somewhere in the journey.3)optimize the optimal path planning algorithm.Improving algorithm for the optimal path in the system enables the system to provide more accurate paths to help the guardian find the missing persons.2)improve positioning accuracy of mainland figure system.By improving the precision of map collecting location information to improve the positioning precision of the map.Positioning accuracy to improve the system to provide to the path of the guardian will be more accurate.The ultimately purpose of the optimization of system method is only one,that is to improve the efficiency of the guardian to find missing persons,can let missing as soon as possible out of the woods or dangerous.