Method and apparatus for detecting the peak of an analog signal
US4916673A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1988 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Jun 28, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/1532
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for processing a signal generated by a borehole scanning system of the type in which periodic electrical firing pulses initiate a plurality of corresponding acoustic energy pulses which are transmitted from the central portion of the borehole toward the borehole wall in a plurality of radial directions and at a plurality of different depths, thereby generating reflected acoustic pulses which are detected and converted to electrical pulses. The electrical pulse is periodically sampled with each sample level being converted to a digital number. A counter initiates counting in response to the firing pulse preceding the sample electrical pulse. Upon detection of the peak of the electrical pulse, the counter count is stored. Upon detection of the electrical pulse again falling below a preselected level, the count is again stored. Then the time midway between the two stored counts is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.