Determination of the bearing from a geophone to a seismic source
US7835867B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2008 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Jun 2, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques are disclosed for determining the bearing from a three-axis geophone to a seismic source, such as a person or other man-made seismic source. In one embodiment, the techniques are implemented as a method that includes receiving outputs from a three-axis geophone (x axis, y axis and z axis outputs), computing a magnitude signal based on the x and y axis outputs, determining locations of each local peak in the magnitude signal, computing a bearing estimate for each peak, and computing a median of the bearing estimates. The resulting median bearing is an estimate of the bearing from the geophone to a target seismic source. In one such case, computing the magnitude signal based on the x and y axis outputs is performed in response to detecting the target seismic source in the phase-shifted z axis output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.