Wireless and passive acoustic wave rotation rate sensor
A rotation rate sensing apparatus is configured from an acoustic wave device comprising a plurality of interdigital transducers for the SAW configuration or electrodes for vibration beams configuration. Such sensors are configured upon an elastic substrate. In the SAW configuration, the plurality of...
Saved in:
| Format | Patent |
|---|---|
| Language | English |
| Published |
21.04.2005
|
| Online Access | Get full text |
Cover
| Summary: | A rotation rate sensing apparatus is configured from an acoustic wave device comprising a plurality of interdigital transducers for the SAW configuration or electrodes for vibration beams configuration. Such sensors are configured upon an elastic substrate. In the SAW configuration, the plurality of interdigital transducers includes a first interdigital transducer, a second interdigital transducer and a third interdigital transducer. A generator(s) can be formed from the first and third interdigital transducers, wherein the generator generates a standing wave subject to a Coriolis force by adding two progressive waves at each of the first and third interdigital transducers. In the vibration beams configuration, a drive beam(s) and pickup beam(s) can be implemented such that the vibration beams are excited through an RF signal and a Coriolis force excites the pickup beam(s) in order to obtain angular/rotation rate data. |
|---|