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Section 3
3 Sensor Overview
3.1 Introduction
The scan 21X5 sensors are based on LMI's field-proven FireSync platform,
which provides a synchronized, scalable, distributed vision processing architecture for
building reliable, high performance systems. High reliability and simple, rapid installation
are achieved with a single cable for power, data, and synchronization. Communication
is via Gigabit Ethernet.
3.2 Measurement Principles
The scan 21X5 sensors function on the principle of structured light triangulation.
A semiconductor laser with special optics projects fan of light onto the target. A digital
camera mounted at an angle to the laser plane acquires images of the light pattern
created on the target. These images contain the basic information needed to compute
distances to the target.
