Saw torque and temperature sensor
US7795779B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 2006 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | Apr 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/265
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A contactless SAW based torque and temperature sensor includes three SAW resonators 2, 3, 4 mounted on a common substrate 1 made of Y+34° cut of quartz. The first SAW 2 has its principle axis inclined at +45° to the X-axis of the substrate, which, in use, is either aligned with the longitudinal axis of a device whose torque is to be measured or is perpendicular thereto, and the second SAW 3 has its principle axis inclined at 135 degrees to the X-axis of the substrate. The third SAW 4 is positioned with its principle axis inclined at an angle, preferably in the range of 0 to 30 degrees, to the principle axis of both the first 2 and second 3 resonators so that none of the SAWs are parallel, the third SAW 4 enabling temperature measurements to be taken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.