Affiliation:
1. Chinese Academy of Sciences
2. China Ship Development and Design Center
Abstract
A laser ranging system for scanning detection based on phase shift ranging technology and a MEMS mirror for space detection and measurement is presented in this paper. The laser ranging system is mainly composed of a modulation module, a laser, a MEMS mirror, a photo-electric conversion module and a signal processing module. The phase shift ranging method is used to measure the relative range to the target. The MEMS mirror is a micro scanner with two DOF, which is used to change the direction of the emitted laser beam. The modulated laser beam is emitted through the MEMS mirror and reflected from the target. The relative range is calculated by the phase shift between the emitted beam and the reflected beam. The experimental results indicate that the measurement accuracy is 0.10 m in static status and 0.17 m in scanning status in the range of 3 m. The differences between the static and the scanning status are analyzed and improvements are proposed.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science