Disclosed examples include lens cleaning systems, drivers and operating methods, including a transducer mechanically coupled to a lens, a driver to provide an oscillating drive signal to the transducer and a controller to control the drive signal frequency to vibrate the lens at frequencies in a range of interest. The controller determines a measured resonant frequency of the lens cleaning system in the range of interest according to a transducer feedback signal and selectively performs a lens cleaning operation if the measured resonant frequency differs from a baseline resonant frequency of the lens cleaning system for a clean lens.
ULTRASONIC LENS CLEANING SYSTEM WITH FOREIGN MATERIAL DETECTION
ULTRASCHALL-LINSENREINIGUNGSSYSTEM MIT ERKENNUNG VON FREMDSTOFFEN
SYSTÈME À ULTRASONS DE NETTOYAGE DE LENTILLE AVEC DÉTECTION DE MATIÈRE ÉTRANGÈRE
2023-08-16
Patent
Electronic Resource
English
IPC: | B08B Reinigen allgemein , CLEANING IN GENERAL / H10N / B06B GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL , Erzeugen oder Übertragen mechanischer Schwingungen allgemein / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen |
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