System and method for very low frequency detection of an event signature
US10666273B1 · kind B1 · utility
1Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2019 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Jan 9, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/2883
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system includes a very low frequency (VLF) antenna connected to a circuit that has a high pass filter and a low pass filter. The circuit is configured for noise reduction and frequency localization of detected VLF signals. A receiver is configured to receive filtered VLF signals output by the circuit and to separate desired signals for processing. A display is configured to provide a user with visual feedback based at least in part on an even signature extracted by a digital signal processor (DSP).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.