Optical cargo detection

Details Optical cargo detection Optical cargo detection

2008-06-03

2008-06-03

Epps, Georgia Y. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140LS, C250S215000, C398S151000

Reexamination Certificate

active

07381939

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.

REFERENCES:
patent: 3920970 (1975-11-01), Slaker
patent: 5099113 (1992-03-01), Oi et al.
patent: 5710424 (1998-01-01), Theodoras et al.
patent: 6115128 (2000-09-01), Vann
patent: 6211784 (2001-04-01), Nishide
patent: 6753950 (2004-06-01), Morcom

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