Patent ID: 6634279
Filing Date: 2003-10-21
Classification: A47J,G01F

Abstract:
An ultrasonic system for measuring the volume of a liquid in a container, comprising:a control board; a lid for the container; and an ultrasonic sensor subsystem that is electronically coupled to said control board and is located within and on the underside of said lid, said ultrasonic sensor subsystem being embedded within the underside of said lid, wherein said ultrasonic sensor subsystem is adapted to determine the level of liquid in the container, and said ultrasonic sensor subsystem comprises at least one ultrasonic pulse transducer for both transmitting and receiving ultrasonic signals while located within and on the underside of the lid of said system, said at least one transducer being embedded within and on the underside of said lid and emits ultrasonic pulses towards the liquid/air interface of an underlying liquid column housed in the container, and said ultrasonic pulse transducer located within and on the underside of the lid of said system receives said ultrasonic pulses reflected back to the lid to determine the level of liquid in the container.