Wireless surface acoustic wave temperature sensor and interrogation system apparatus capable of generating a self synchronizing shaft position indicator for moving platforms
US9404810B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2015 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Apr 14, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0675
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A surface acoustic wave sensor system for use with a moving platform. The system comprises an interrogator for producing an RF interrogating signal transmitted from a first antenna. A substrate that supports surface acoustic waves is attached to the moving platform and an interdigital transducer (IDT) and reflector are mounted on the substrate. The IDT produces surface acoustic waves (SAW) responsive to the RF interrogating signal. The reflector produces reflected SAW responsive to the incident SAW and responsive to a characteristic of the moving platform. A position indicator produces a synchronization signal input to the interrogator for triggering the RF interrogating signal. The synchronization signal is timed to trigger the RF interrogating signal when the interdigital transducer is within a field-of-view of the first antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.