Embedded Real-time Laser Positioning System

In this thesis, the positioning principle, design process and applied technology of the Embedded Real-time Laser-positioning System researched and developed by us ourselves are introduced comprehensively. As a kind of laser-positioning system, the system collects the facula image by CMOS Image Sensor. And the precise position of the facula can be worked out with center of gravity method. In the usage of center of gravity method, it inevitably will be affected by the background light. In order to eliminate or weaken the affect, the methods of optical filter and image segmentation are presented. Meanwhile as a kind of embedded real-time system, the system centers on DSP which is in charge of getting the position of the facula quickly and making the system work in line. And to contact CMOS Image Sensor with DSP, CPLD is applied in the system, which not only simplifies the circuit design but makes the system convenient to debug, closer and more reliable. Based on the system, we cooperated with Xi'an sicong Laser Co.,Ltd in developing Two-dimension Laser-positioning Image Displacement Sensor and Road Level Measurement Instrument.In a word, the Embedded Real-time Laser-positioning System is a kind of portable, high precision, low power dissipation, low cost and reliable instrument that has wide applied foreground.