KOMPAKTES SENSORSYSTEM ZUR OPTISCHEN BEWEGUNGSERKENNUNG IN ECHTZEIT

DE 19712017 A UPAB: 19981223 The sensor system is used for optical movement identification using real time calculation of the x and y components of the optical flow of an image stream according to a predetermined algorithm. The sensor system has an image data generator unit based on a two dimensional photo diode matrix. This has an adaptation region and an at least section wise sequential image data output. The system also has a high rate data processor based on a user specific CMOS logic chip. The processor has a pre-processor and calculating logic as well as an external, selection free working memory accessible via two parallel ports, and a control unit. In the image processor (6) the conversion of a continual iterative calculation of the x and y components according to the gradient algorithm is realised by a digital hardware architecture of the CMOS chip in the form of a consequent pipeline structure with a simple data feedback (22). The preprocessor (13) is integrated with a first arithmetic computer unit (16) by connecting a first shift register (15) and the calculation logic (14) is integrated with three further arithmetic computer units by connecting three further shift registers, and with a block for calculating the optical flow , having several pipeline stages. The external operating memory is formed of three identical memory elements each with an associated arithmetic unit. USE - Especially for object navigation to avoid collisions. ADVANTAGE - Provides a compact, reliable, high rate sensor system.