Method for balancing the sensitivity of two channels in a differential detection apparatus
US4127813A · kind A · utility
8Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 1977 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | May 17, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for balancing the sensitivity of two channels comprising intermittently-appearing pulse waves, such as the signals generated by respective sensors in a detecting couple which is used in the so-called differential detection of flaws in materials. The balancing of the levels of the pulse signals is accomplished by the use of, essentially, a pair of sample and hold circuits, one or two variable gain amplifiers and the same number of comparison loops as variable gain amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.