Saw torque and temperature sensor with improved temperature sensitivity
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 27, 2011
Grant Date -
Jul 29, 2010
app pub date -
Apr 6, 2010
filing date -
Jun 15, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A contactless SAW based torque and temperature sensor comprising a first (2) and second (3) SAW resonator provided on a substrate made of Y+34.degree. cut of quartz. The first SAW resonator (2) has its principle axis inclined at +45.degree. to the X-axis of the substrate, which, in use is either aligned with the longitudinal axis of the device who torque is to be measured or is perpendicular thereto, and the second SAW (3) has its principle axis inclined at -45.degree. to the X-axis of the substrate. A third SAW (4) has its principle axis inclined at an angle of 30 degrees to the X-axis of the substrate. Each said SAW resonator (2,3,4) is formed by laying a film of aluminum on the substrate having a thickness (h) and the SAW resonators have an average operating wavelength .lamda. where the ratio h/.lamda. is in the range 0.021 to 0.032.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully