TRAVERSAL ALGORITHM FOR COMPLETE COVERAGE

Abstract

There are many applications which require complete coverage and obstacle avoidance. The classical A* algorithm provides the user a shortest path by avoi ding the obstacle. As well, the Dijkstra’s algorith m finds the shortest path between the source and destinatio n. But in many applications we require complete coverage of the proposed area with obstacle avoidan ce. There are LSP, LSSP, BSA, spiral-STC and Complete Coverage D* algorithms which do not realize complete (100%) coverage. The complete coverage using a critical point algorithm assures complete c overage, but it is not well suited for applications like mine detection. Also for covering the missed region it k eeps the obstacle as a critical point which is not advisable in critical applications where obstacle may be a da ngerous one. To overcome this and to achieve the complete coverage we propose a novel graph traversal algorithm Traversal Algorithm for Complete Coverage (TRACC). Here the area to be scanned is decomposed into a finite number of cells. The travers al is done through all the cells after making sure the next cell has no obstacle. TRACC assures thorough coverage of the proposed area and ensuring that all the obstacles are avoided. Hence the TRACC always have the safer path while covering the entire area. It also reports the obstacle placed or blocked cel l.