Patent ID: 11945413
Assignee: DENSO CORPORATION
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 9:
10. The rainfall amount measurement apparatus according to claim 9, wherein:
a light emitter is provided on a side of an inner wall surface of the windshield opposite to the outer wall surface, to radiate a measurement light towards a detection region on the outer wall surface of the windshield;
the detector is provided on the side of the inner wall surface to receive a reflection light of the measurement light from the detection region, to generate the output corresponding to an amount of the received reflection light; and
the raindrop amount information is an integrated value of rate information that is information corresponding to a rate of the raindrops attached to the detection region,
the rate information being information corresponding to a degree of decrease in the amount of the received reflection light in a plurality of sampling times set in the measurement period, the decrease being caused by the raindrops attached to the detection region.