Binocular Parallax Digital Rangefinder Signal Processing System

Rangefinders are widely used to measure distance or detect target orientation in earth measure, not only including river width measurement,architectural measurement construction and circuitry paving ,but also including vehicle avoiding collision,robot vision and military affairs and others high-tech field.The rangefinder system in this paper desided to base on binocular parallax after analyzing strongpoints and shortages of different distance measurements. The digital rangefinder based on binocular parallax is a passive, non-contact rangefinder which compared with active Rangefinders needn't send signal, which only passively receive signal, so it is free to expose yourself.,what's more, it doesn't contact target, doesn't influence the character of the measured object, so it can be repeated. Compared with traditional binocular parallax rangefinder ,the digital rangefinder needn't manual measuring and calculation, which can match and calculation automatically,so it has high speed and precision and reliability. When its measuring scale between 500m and 6000m, academic precision can reach 1%.At this paper, we systemic research the theory, precept, manufacture of the Digital Rangefinders based on binocular parallax, we complete those work:1, By analyzing the theory of binocular parallax, we studied the relationship of structural parameter, measure scale and precision. Based on the other's work ,improving the digital measurement structure design.2, Have completed the digital rangefinder's signal collection and processing system, including drives of CCD, magnifying circuit and filter, ADC and buffer memory cell, system control and data processing cell.3, Completed the data processing programma on embedded system and control programma on PC.4, We setup the digital rangfinder and carry through measuring test. By analyzing the test data, validated the system circuit design and embedded data processing arithmetic on real-time and measurement precision.