An implementation method of high-speed row parallel position detection on sensor plane

摘要

A method of high speed position detection for 3-D measurement using sheet light projection is presented. We can detect the position of the projected light quickly by row parallel binary-tree search using the method. We implemented the row parallel binary-tree scan effectively on a smart position sensor. The sensor has a 128×128 pixel array, row parallel controllers, a column controller, and a serial/parallel converter on a 4.9mm×4.9mm die. The sensor is designed using a 0.35μm CMOS 3-metal 2-poly-Si process. By the result of circuit simulation, the sensor can detect the position of projected light at 700Mpoints/s. The maximum speed of 3-D measurement using a 1024×1024 pixel sensor is 1kRangeMaps/s.