Optical level measurement device and method
AssigneeLeddarTech Inc.
InventorsYvan Mimeault, Louis Perreault
Life of this patent
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Abstract
A method and system for determining a level of a substance in a container, the method comprises emitting one pulse from a light source in a field of illumination toward a surface of said substance in said container. A backscatter signal of said pulse is detected by an optical detector. A lidar trace is created from said backscatter signal, said lidar trace including at least one reflection peak; A surface reflection is identified among said at least one reflection peak in said lidar trace, said surface reflection being a reflection of said pulse from said surface. The surface reflection is signal-fitted to provide a fitted surface trace. A level of said substance is determined in said container using said fitted surface trace.
Claims21
A method for determining a level of a substance in a container, the method comprising:
- emitting one pulse from a light source in a field of illumination toward a surface of said substance in said container;
- detecting a backscatter signal of said pulse by an optical detector;
- creating a lidar trace from said backscatter signal, said lidar trace including at least one reflection peak;
- identifying a surface reflection among said at least one reflection peak in said lidar trace, said surface reflection being a reflection of said pulse from said surface;
- signal-fitting said surface reflection to provide a fitted surface trace;
- and
- determining a level of said substance in said container using said fitted surface trace.
A fill-level sensing device for determining a level of a substance in a container comprising:
- a light source for emitting light in a field of illumination toward a surface of said substance in said container;
- a pulse driver for driving the light source into emitting one pulse;
- an optical detector adapted to detect a backscatter signal of said pulse;
- and
- a data/signal processor for creating a lidar trace from said backscatter signal, said lidar trace including at least one reflection peak, for identifying a surface reflection among said at least one reflection peak in said lidar trace, said surface reflection being a reflection of said pulse from said surface;
- for signal-fitting said surface reflection to provide a fitted surface trace;
- and for determining a level of said substance in said container using said fitted surface trace.
Dependencies are inferred from the claim text.