Study Of Small High-frequency Laser Range Finder Used In Automotive Collision Avoidance System

As the tenure of the car rising, traffic safety has become a widespread social problem of concern to active safety car was driving increasing attention. The topics to design a vehicle to take the initiative to protection of laser ranging radar. Requirements for project design specifications: Ranging 200 m, measurement error 0.5 m, the laser frequency: 1 KHz.First of all, the paper introduced anti-vehicle laser radar development. With the actual choice of location as the laser pulse Ranging system. Detailed analysis of the laser pulse ranging theory, that the human eye not only satisfy the security conditions and meet the needs of detecting the rangefinder key parameters. Then the different parts of the system circuit analysis and design, produced a laser transmitter and receiver signal circuits, high-frequency count circuit, completed the preliminary design after the experiment.The experiments show that the system of long-term, stable, reliable data, error 0.5 m, measured way 200 m, measuring frequency decided entirely by laser duty cycle.