Research on embedded access control security system and face recognition system

Aiming at an access control security system, the paper provides overall architecture of the security system and illustrates system functions and system software; lists structural diagrams of system hardware and illustrates functions of Ethernet interface circuit, GPIO interface circuit, RS485 bus interface circuit and GPRS module circuit; describes theories and wiring of security detectors such as vibration detector, infrared detector, smoke detector and combustible gas detector; gives detailed description of GPIO drive program design, lists a flow chart of the security signal collection program and designs a monitoring interface of security signals by QT; realizes control of video functions and video camera rotation, and lists a flow chart of video collection program; controls the pan-tilt camera by PELCO protocol, and realizes alarming by the GPRS module; establishes a Web server, designs a user registration page, a user login interface and a security monitoring page in order to realize remote access to the security server; analyzes design of cookie and front-end design programs of view monitoring web pages; lists a flow chart of remote video monitoring program, and illustrates CGI key codes of remote control of pan-tilt camera; designs a face identification program based on the embedded system, analyzes the face detection algorithm and the face identification algorithm, and realizes program design of PCA algorithm.