Ultrasonic communication system
US10447410B2 · kind B2 · utility
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10References
19Claims
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Key dates
| Filing date | Nov 26, 2014 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Oct 17, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/009
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A sensor network includes a sink and multiple sensor nodes. The sink is coupled to a substrate and configured to transmit a periodic ultrasonic pulse on the substrate. A first one of the sensor nodes is coupled to the substrate. The first sensor node is configured to (i) receive the periodic ultrasonic pulse from the substrate, (ii) synchronize an internal clock of the first sensor node to the sink based on the periodic ultrasonic pulse, (iii) selectively detect an event in a region surrounding the first sensor node, and (iv) in response to detecting the event, transmit a first ultrasonic pulse toward the sink on the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.