Nixon & Vanderhye P.C.
Raindrop detecting method and apparatus having temperature-dependent characteristic compensation
A raindrop detecting apparatus has a temperature sensor, an EEPROM, a processor and a raindrop sensor. A temperature characteristic data is defined by a first temperature data of the temperature sensor and a first output data of the raindrop sensor produced at a first temperature condition, and stored in the EEPROM. The processor updates a raindrop detection threshold by using the stored characteristic data, a second temperature data and a second output data produced at a second temperature, when an engine is started under no-raindrop condition. The processor compares an output data of the raindrop sensor with the raindrop detection threshold to detect a raindrop, while converting at least one of the characteristic data and the output data in correspondence with a temperature data produced at a raindrop detection time.
Denso Corporation
B B B
B60S B60S B60S
additional inventional additional
Akira Shinji Osamu Junichi
Kurahashi Wakabayashi Terakura Ishikawa