Ultrasonic Short-range Detection Theory And Research

Smart weapons will play a more and more important role in future warfare. A distinct feature that make smart weapons different from traditional ones is that they can decided what kind of objects the invading enemy weapons are, and attack them initiatively. Ultrasonic has become a hot field last years because of its virtues. This thesis presents a kind of detective mode of simple smart mines act on ultrasonic systems.This thesis deals with ultrasonic propagation characteristics, studies ultrasonic sensor, detective method and concerned circuits. When there is strong noises in ultrasonic data, conventional methods can't effectively remove noises, wavelet analysis is a good choice for ultrasonic data. By improving ultrasonic data's Signal-to-Noise, we can improve the system's detective distance.