Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-03-28
2006-03-28
Porta, David (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S573000, C318S483000, C356S436000, C356S445000
Reexamination Certificate
active
07019321
ABSTRACT:
In a rain sensing device, a sensing device that can estimate the size of raindrops or the like without a large amount of hardware resources, and its sensing method, and a wiper controlling apparatus using the same can be provided. In a sensing device, light emitted from a light-emitting member is introduced to a transparent plate, reflected by a sensing surface of the transparent plate and then received by a photo-detector, thereby detecting a condition of the sensing surface. The sensing device includes a sampling part for sampling signals from the photo-detector, a compression part for compressing signals in a sequence of the sampled signals when they continue within a single segment, where a plurality of the segments defined by a plurality of predetermined values are set with respect to an input signal, a calculation part for calculating a compressibility from the number of the sampled signals to be compressed by the compression part and the number of the sampled signals that have been compressed thereby, and a judging part for judging the condition of the sensing surface based on the compressibility.
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Kokuryo Kazuto
Nagao Shinji
Hamre Schumann Mueller & Larson P.C.
Niles Co., Ltd.
Porta David
Yam Stephen
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