raindrop detection device raindrop detection method and with a compensation of a temperature-dependent property

摘要

raindrop detection device (6), characterized bya raindrop sensor (15) for raindrop detection and for the generation of the output data indicating raindrop detection,a temperature sensor (10) for detecting an ambient temperature of the raindrop sensor (15) and for the production of the sensed temperature temperature data indicating,a memory (11) for storing temperature characteristic data, which the temperature data and the output data corresponding to the temperature data, anda processing means (12) for raindrop detection from temperature data of the temperature sensor (10), from output data of the raindrop sensor (15) and from the stored characteristic data, whereinthe stored characteristic data output ratio output ratio data including a first output of the raindrop sensor (15) to in the case of a reference temperature generated reference output data of the raindrop sensor (15), indicating,the memory (11) is adapted by the reference temperature, in order to various first reference temperature data temperature data, the first temperature corresponding first output data and the the reference temperature data corresponding reference output data, and wherein these data in front of a mounting of the temperature sensor (10) and of the raindrop sensor (15) in the case of a state without rain drops generated data correspond to,the processing means (12) is adapted to the stored characteristic data, in order to second temperature data of the temperature sensor (10) and corresponding to the second temperature data generated second output data of the raindrop sensor (15) to update,the processing means (12) is adapted to the second output data, in order by the second temperature data and to correct the stored output ratio data,the second temperature data and the second output data in the case of a state without rain drops, when the temperature sensor (10) and the raindrop sensor (15) are mounted on a vehicle, and correspond to data generatedthe processing means (12) includes: ..