| 摘要 |
An automatic, ultrasonic system for controlling the filling of different sizes of beverage containers which may or may not contain various quantities of ice. The system includes a transducer assembly and a control module, both preferable connected to a beverage dispenser valve assembly. The transducer assembly includes two pairs of piezo-electric crystals (430,432; 434,436) for separately transmitting and receiving ultrasonic wave energy from the grate, the cup lip, the top of any ice in the cup, and the rising liquid level, and for generating signals corresponding to the travel time of the ultrasonic energy. The control module includes a microcomputer and associated circuitry. The system includes two separate transmitter and two receiver crystals. |
