Pole Detection

The system consists of two acquisition units mounted side by side on the inspection car‘s rooftop. Each unit comprises two distance measurement systems with the beams directing vertically upwards. The light of a high-frequency modulated laser beam is reflected by objects and collected by a lens onto a detector. The phase of the detected signal differs from the emitted signal due to the light‘s time of flight. From this phase shift one can deduce the distance to the object. The system records a pole if both laser beams of an acquisition unit are reflected simultaneously.