Active 3D monitoring system for traffic detection
First Claim
1. A method for detecting the presence of an object in a detection zone using a traffic detection system, wherein said object is one of a moving object and a stationary object, the method comprising:
- providing said traffic detection system including an optical unit havingan optical emitter module emitting short light pulses within a predetermined field of emission, said field of emission being a field of illumination;
an optical receiver module receiving a part of the light pulses reflected by an object in said field of emission toward a field of view of said receiver module said field of view including a plurality of adjacent detection channels, said receiver module acquiring for a period of time after the emission of said pulses and converting said received light pulses into a corresponding plurality of a digital signal waveforms, andan image sensing module providing an image that encompasses the field of emission of the emitter module and the field of view of the receiver module;
providing a status overlay image for said field of view including said image and a visual indication on said image of an outline of said plurality of adjacent detection channels;
positioning the field of view of said receiver module to cover said detection zone using said status overlay image;
obtaining said plurality of digital signal waveforms using said traffic detection system;
detecting a signal echo in one of said digital signal waveforms at a position within said field of view, said signal echo being caused by said presence of said object in said field of view;
determining a location in said field of view for said object using said position including calculating a time taken by the emitted pulses to travel from the optical unit to the object and return back to the optical unit;
storing said location for said object, andsending said stored location to an external processor.
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Accused Products
Abstract
The traffic detection system includes an optical unit having an emitter module emitting pulses; a receiver module having a field of view including a plurality of adjacent detection channels receiving pulses reflected by an object and acquiring and converting the received pulses into a corresponding plurality of a digital signal waveforms; an image sensing module providing an image. The method comprises providing a status overlay image including the image and a visual indication on the image of an outline of the plurality of adjacent detection channels; positioning the field of view to cover the detection zone using the status overlay image; obtaining the plurality of digital signal waveforms; detecting a signal echo caused by an object in one of the digital signal waveforms at a position within the field of view; determining a location for the object using the position; storing the location for the object.
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Citations
22 Claims
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1. A method for detecting the presence of an object in a detection zone using a traffic detection system, wherein said object is one of a moving object and a stationary object, the method comprising:
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providing said traffic detection system including an optical unit having an optical emitter module emitting short light pulses within a predetermined field of emission, said field of emission being a field of illumination; an optical receiver module receiving a part of the light pulses reflected by an object in said field of emission toward a field of view of said receiver module said field of view including a plurality of adjacent detection channels, said receiver module acquiring for a period of time after the emission of said pulses and converting said received light pulses into a corresponding plurality of a digital signal waveforms, and an image sensing module providing an image that encompasses the field of emission of the emitter module and the field of view of the receiver module; providing a status overlay image for said field of view including said image and a visual indication on said image of an outline of said plurality of adjacent detection channels; positioning the field of view of said receiver module to cover said detection zone using said status overlay image; obtaining said plurality of digital signal waveforms using said traffic detection system; detecting a signal echo in one of said digital signal waveforms at a position within said field of view, said signal echo being caused by said presence of said object in said field of view; determining a location in said field of view for said object using said position including calculating a time taken by the emitted pulses to travel from the optical unit to the object and return back to the optical unit; storing said location for said object, and sending said stored location to an external processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification