Based on probabilistic sensing model, a virtual sensor is constructed by information fusion scheme that fuses sensing measurements of two sensors, which can significantly improve coverage region. Based on the theories, a barrier coverage preserving configuration algorithm is proposed. The algorithm provides continuous barrier coverage for the whole region by divide-and-conquer approach, which can reduce the communication overhead. Moreover, the redundancy nodes are scheduled to sleep for reducing energy consumption and prolonging the network lifetime. Analysis and experiment results show that the validity of model and algorithm enhancing coverage range and increasing the max separation distance between two sensors, and the algorithm outperforms the barrier coverage preserving configuration scheme based on information non-fusion sensor, on the number of barrier and network lifetime.