Leddartech Inc.

Leddarttech Inc.

Michael Poulin

Yvan Mimeault

Pierre Olivier

Samuel Gidel

Vincent Simard-Bilodeau

Pier-Olivier Hamel

David Arrouart

A method and system for the detection of an object in a detection zone for a scannerless optical rangefinder operating in pulsed Time-of-Flight operation are described. The method comprises pulsating a light source to illuminate the detection zone using an emission beam; receiving a reflection from the detection zone, collecting the reflection using an optical detector and generating a reflection signal; discretizing the detection zone to create a predetermined detection pattern in the detection zone, the predetermined detection pattern being one of regular, uniform and random, the predetermined detection pattern including passive areas and discrete active detection areas within the detection zone; detecting an object in one of the discrete active detection areas by comparing a change in the reflection signal with a background signal.

Discretization of detection zone

A method for detecting a vehicle comprising: providing a multi-channel scannerless full-waveform lidar system operating in pulsed Time-Of-Flight operation oriented towards a surface of the roadway to cover the detection zone; providing at least one initialization parameter; emitting pulses at an emission frequency; receiving reflections of the pulses from the detection zone; and acquiring and digitalizing a series of individual complete traces at each channel of system; identifying at least one detection in at least one of the traces; obtaining a height and an intensity for the detection; determining a nature of the detection to be one of an environmental particle detection, a candidate object detection and a roadway surface detection; if the nature of the detection is the candidate object detection, detecting a presence of a vehicle in the detection zone.

System and method for traffic side detection and characterization

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L'Ancienne-Lorette, Canada

Michael Poulin