Measuring and testing – Fluid pressure gauge – Vibration type
Patent
1979-10-04
1981-01-13
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Vibration type
73717, 367 99, G01L 1100
Patent
active
042442265
ABSTRACT:
A distance measuring apparatus and a differential pressure transmitter utilizing the same having an ultrasonic element reflector mounted between a pair of ultrasonic transducers. The alternate operation of the ultrasonic transducers produces a pair of transducer energizing signals which are related to the relative separation of the reflector element from the transducers. In one embodiment, the reflector element is mounted within a closed pressure vessel divided internally by an ultrasonic reflector diaphragm with a pair of fluid inlet lines admitting respective pressurized fluids to corresponding sides of the reflector diaphragm. The ultrasonic transducer elements are mounted on the outside of the pressure vessel on an acoustical signal transmitting interface and are arranged to alternately supply an ultrasonic signal through the pressure vessel wall to the respective side of the diaphragm reflector while an analysis of the frequency of operation of each transducer is used to determine the differential pressure applied to the diaphragm.
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Green Norman F.
Keiles Yoel
Newbold William F.
Searle John L.
Wilda Douglas W.
Burton Lockwood D.
Halista Mitchell J.
Honeywell Inc.
Marhoefer Laurence J.
Woodiel Donald O.
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