Aiming at problem that heterogeneous sensor nodes are randomly deployed in monitored area prone to genenate coverage leak

a coverage leak repair algorithm based on sampling straight line scan is proposed. Coverage leak are found based on sampling straight line scan; coverage leak are repaired by mobile sensor nodes. The algorithm treats the completely covered area by sensor nodes as the optimization goal and it is applicable for both homogeneous sensor nodes with the sensing radius of and the perception of the heterogeneous sensor nodes with different sensing radius. Simulation results show that the algorithm can effectively repair coverage leak.