关键词: 水下, 接近觉, BP神经网络, 定位

Abstract: For the underwater multi-targets localization problem of sonar sensor，a new proximate sensor for underwater condition is proposed and the design is based on the analysis and test of ultrasonic traveling and echoing in water.The working principle and components of proximate sensor are introduced in detail.Different from the geometric interpolation method proposed before，a novel multi-targets localization method based on BP neural network is presented，which has the advantage of no limitation on target number.Two kinds of simulation experiments are performed：One is region localization and the other is accurate angle localization.The simulation results show that the method proposed is efficient and has enough accuracy.

Key words: underwater, proximate sensor, BP neural network, localization