DUAL MODE QUARTZ THERMOMETRIC SENSING DEVICE
Assignee
US Government
Filed as: UNITED STATES OF AMERICA, THE, AS REPRESENTED BY THE SECRETARY OF THE ARMY
Filed
Apr 20, 1983
Granted
Oct 10, 1989
Location
WAYSIDE NJ US
Abstract
A circuit is shown for representing the internal temperature of a crystal, through a combination of certain harmonic frequencies excited in that crystal. By forming a signal which is equal to nFA -FB, i.e., n times a lower harmonic frequency minus FB, an nth harmonic frequency, or FA -1/n FB, e.g., it is possible to have a signal which is near linearly dependent upon temperature which can be used in representing same. This composite signal is also seen to be highly sensitive to temperature changes yielding an improved thermometric system as compared to conventional systems.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Nov 17, 1983
Rescinded
May 5, 1989
Duration
5 years, 5 months
Inventor
- 1STANLEY S. SCHODOWSKI
Record Details
- Patent number
- US 4872765
- Application
- 00648756
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
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