Optical level measurement device and method
First Claim
1. 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.
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Accused Products
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.
45 Citations
21 Claims
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1. A method for determining a level of a substance in a container, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A fill-level sensing device for determining a level of a substance in a container comprising:
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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. - View Dependent Claims (18, 19, 20, 21)
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Specification