Measuring and testing – Vibration – By mechanical waves
Patent
1990-09-04
1994-08-09
Arana, Louis
Measuring and testing
Vibration
By mechanical waves
73290V, 367903, G01N 924
Patent
active
053355458
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 the 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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Product Brochure entitled "Sensall System 8100 Ultrasonic Continuous Liquid Level Transmitter", Envirotech.TM..
Document entitled "System 8100--Technical Description", (date unknown) National Sonics Div.
Arana Louis
Magnetrol International Inc.
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