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US 10,207,300 B2Granted
Ultrasonically clearing precipitation
AssigneeEchoVista GmbH
InventorsDavid Robert Murray Trevett, Patrick Naven Trevett
Life of this patent
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Abstract
A system for clearing precipitation from a window comprises one or more transducers (1-8) fixed to the window. The transducers are driven by a generator (13) to produce surface acoustic waves that propagate through the window. The window may be a laminated window such as a windscreen (10) for a vehicle. A sensing system (122) may be used for detecting the presence of precipitation to actuate the clearing system.
Claims11
A system for clearing precipitation from a window, the system comprising:
- a laminated window;
- a plurality of transducers fixed to a surface of a top layer of glass of the laminated window and operative to produce ultrasonic waves, wherein at least one of the transducers is further operative to receive the produced ultrasonic waves and to provide a signal indicative of a presence of precipitation on the laminated window upon occurrence of a drop in an acoustic energy of said received ultrasonic waves;
- and
- a generator for generating an ultrasonic drive signal to drive the plurality of transducers to produce the ultrasonic waves such that the ultrasonic waves propagate substantially only through the top layer of glass so as to clear said precipitation from said window.
1 more element
Dependencies are inferred from the claim text.