Method and apparatus for the generation and transmission of signals for echo location and other signaling purposes, particularly in geophysical exploration
US4729066A · kind A · utility
4Cited by
4References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 24, 1984 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Dec 24, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transmission which requires only a single source to transmit is generated in accordance with a code which is binary (a pulse train having two levels which produces a specific harmonic line spectrum). The pulses are generated by pulse time modulation of the position and duration of pulses in a sweep which extends to the upper end of the spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.