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AssigneeDelaware Capital Formation, Inc.
InventorsErrol P. EerNisse, Milton Watts
Estimating the term…
A cylindrical quartz crystal transducer that exhibits a low probability of twinning, and uses a combination of resonator signal inputs at the B-mode and C-mode frequencies to calculate resonator temperature. Crystallographic orientations are disclosed where combinations of B-mode and C-mode resonant frequencies exist that are sufficiently independent of pressure to enable accurate calculation of temperature under transient conditions. Such a transducer is usable at higher pressures and temperatures than conventional quartz pressure transducers. Furthermore, because the structure allows a choice of crystallographic orientation, other characteristics of the transducer, such as increased pressure sensitivity and activity dip-free operation, may be optimized by varying crystallographic orientation.
A dual-mode pressure transducer, comprising:
A dual-mode pressure transducer, comprising:
A method of measuring a temperature-compensated pressure using a quartz crystal structure, the method comprising:
The method of claim 21, selecting a value of the constant K in the equation defining the change in pressure to minimize temperature dependence of the equation defining the change in pressure.
Dependencies are inferred from the claim text.