Rounded wall surface acoustic wave sensors

Details Rounded wall surface acoustic wave sensors Rounded wall surface acoustic wave sensors

1984-12-31

1986-11-18

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Vibration type

29 2535, 73708, 73729, 73DIG4, 310313B, 310338, G01L 1100

Patent

active

046228543

ABSTRACT:
Disclosed is an externally loaded pressure sensor using a pair of SAW devices formed on the wall of an interior cavity. The difference frequency of these devices is used as a temperature-compensated measure of hydrostatic pressure on the sensor exterior. The cavity wall immediately adjacent the long sides of at least one of the SAW devices is rounded, to improve pressure sensitivity without unacceptable increase in stresses or other adverse effects.

REFERENCES:
patent: 4361050 (1982-11-01), Coussot
patent: 4535631 (1985-08-01), Sinha et al.

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