Method and system for controlling gain and offset in radiation measurement apparatus
US5004904A · kind A · utility
23Cited by
12References
8Claims
0Family size
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Key dates
| Filing date | Jun 13, 1989 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Jun 13, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/4453
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measurement of standard light is performed during radiation measurement for gain correction and offset correction of radiation measurement apparatus. The standard light emitted by a LED falls on a PMT. An output signal of a preamplifier corresponding to the PMT is entered into a system controller after being subjected to predetermined analog signal processing. The system controller calculates a gain correction value and an offset correction value on the basis of initial correction values and an output value of the preamplifier, whereby gain control and offset control can be performed stably even in radiation measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.