Detector with ringdown frequency matching

Details Detector with ringdown frequency matching Detector with ringdown frequency matching

1993-01-22

1994-01-11

Arana, Louis

Measuring and testing

Vibration

By mechanical waves

367903, G01N 2900

Patent

active

052770656

ABSTRACT:
An ultrasonic detector of the type for determining the level of a liquid within a tank or the magnitude of the flow of liquid within a conduit. The detector includes a transducer that generates bursts of ultrasonic energy and receives echoes of the energy bursts. The frequency at which she transducer transmits energy bursts is automatically adjusted to substantially match the ringdown frequency of the transducer. The detector distinguishes between true echo signals and spurious echo signals by determining whether the frequency of the echo signals generated by the transducer substantially matches the frequency at which the corresponding energy bursts were transmitted.

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patent: 5157639 (1992-10-01), Leszczynski
Product brochure entitled "Sensall System 8100 Ultrasonic Continuous Liquid Level Transmitter".
Document entitled "System 8100--Technical Description".

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