| Nowadays security has become a worldwide issue. The perimeter is the first line to defense invaders. Therefore, perimeter detecting has become an important issue in the field of security. The main task of Perimeter detecting system is to given signals timely and accurate when the perimeter invaded. With the development of society and scientific technology, The applications of perimeter detecting has become wide range and have been applied to many areas of the society, such as airports, military bases, prisons, bank vaults, oil depots and some other important area.This paper reviews several kinds of the perimeter detecting system that are commonly used at present and purpose a new solution of perimeter detecting. According to the characteristics of the fence, we adopts two kinds of sensors (inertial sensors and vibration cable sensor) to defense the fence and monitor thoses sectors by connecting the camera.The principle of inertial sensors was analysised.we designed the detection circuit and a multi-zone perimeter monitoring alarm mainframe.In this paper, we adoped a method based on vibration detection and designed related hardware and software. TMS320VC5509made by TI company was used as central processor in the hardware.According to the characteristics of vibration of the cable signal, This paper proposed a method about feature characteristics based on wavelet packet analysis of the "band-energy" Several different events has been simulated by MATLAB. Various signal distribution of feature vector were analysised and researched.Designed management software by VC++.Completed Serial interface communication, video capture, database creation and other related functions. |
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