Optical cargo detection
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United States of America Patent
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Jun 3, 2008
Grant Date -
Dec 7, 2006
app pub date -
Jun 2, 2005
filing date -
Jun 2, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A detector for detecting cargo in a container has a controller block, a transmitter for transmitting light into the field of view, a receiver for receiving reflected light, and a threshold comparator for determining whether the received light meets a threshold for cargo detection. The receiver includes a DC block for removing effects of ambient light. The detector performs detection multiple times and averages the results, which can be compared with a previously stored condition of cargo presence or absence to increase the detection accuracy further.
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