Research And Implementation Of Infrared-triggerd Digital Imaging System

In this paper, we study, design and develop an infrared-triggered digital imaging system witch can be applied to the surveillance area. The system is deference from ordinary digital camera systems and video surveillance systems. The main principle of the system is to implement real-time surveilling to the scene and start to capture if moving target is dectected. The system is for the particular application of surveillance, and we pursue to design and develop a lightweight, stable, high-performance infrared-triggered imaging system, with reasonable cost.With related technology research and analysis, we use the pyroelectric infrared sensors as the core device of the infrared automatic trigger module, for the auto-trigger function. For imaging function, we use a similar framework of digital cameras. We use ZORAN COACH6 as the core chip, use OV2630 as the CMOS image sensor, choose SDRAM and NAND FLASH memory chips, and design USB interface. With these we built the imaging subsystem. Since system maintenance relying solely on COACH6 chips runs too much power, we need a MCU witch can be in response to the trigger signal and can switch ON/OFF the imaging subsystems. Also the small MCU has user-setting functions.This paper aims to build an auto-trigger imaging system with fast trigger speed, excellent image quality, low power consumption. Through software process streamlining and image quality fine-tuning based on COACH6 platform, the system is closing in on the target continuously. In the final system testing, the system performs well, fully meets the design requirements, and because of the cost-effective, it can be more widely applied to the surveillance area.