Research Of Archives Warehouse Security System Based On Embedded System

Real-time monitoring of archives warehouse is an important link of archives storehouse security system. In the past, people usually relied on a large amount of manpower to acquire the warehouse environmental information, hence, the archives warehouse security system has been launched based on wired network technology. However, such systems have the complexity of wiring and poor stability; In video surveillance, regular monitoring lacks of real-time image processing, sometimes acquire images and videos are terrible in low luminance environments, It not only influences the effect of further processing, but also can’t do the intelligent analysis according to images. Therefore, under such a background, this thesis presents the wireless communication module based on RF69, combined with the Arduino controller to build a wireless communication system, collecting the archives storehouse for the environmental information.Moreover, in the video monitoring,it introduces low contrast image enhancement algorithm based on CLAHE transform and moving target detection algorithm base on background differencing, which has relized the analysis and processing of the surveillance video.This paper firstly gives a design scheme of archives warehouse security system, and explains the system structure and working principle, then the background knowledge and the related technology in the paper are introduced; Secondly, based on the functional requirements, this paper makes the detailed design for hardware of archives warehouse security system, completed hardware design of the main control part and the data acquisition terminal. Thirdly, based on the improved WR703 n hardware platform, it builds a MJPG-Streamer video server which applies OpenWrt system, and realizes the function of video streaming output. Based on the system, this paper makes the software design, in which early-warning information from data acquisition terminal is collected with OpenCV technology for MJPG-Streamer video streaming, based on the research of image enhancement algorithm for low contrast images and video sequence for moving target detection, and the OpenCV interface function is invoked for image processing and moving target detection, after analysis and processing for images, if there is an invasion of staff, the system would automatically save image information, and send mails in real-time through the 3G module. Using the OpenCV technology would improve the system instantaneity and storage space utilization. Finally, the paper uses pcDuino as core central processor of security system, combined with an embedded Linux operating system as the software and hardware platform. By constructing a WEB server implements automatic control and remote monitoring of archives warehouse environment based on B/S structure.The system design has been completed and coming into use in Nanjing City Land Bureau.