Patent US1950337A successfully refreshed from Google Patents.
EP0346878A2
Expired / Lapsed
EP
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System for controlling gain and offset in radiation measurement apparatus
Assignee: Toshiba Corp
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Filing: 1989-06-14
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Granted: —
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Expires: 2009-06-14
Abstract
Abstract A measurement of standard light is performed during radiation measurement for correction and offset correction of radiation measurement apparatus. The standard light emitted by LEDs (12-1 ∼ 12-n) falls on PMT (10-1 ∼ 10-n). An output signals of preamplifiers (15-1 ∼ 15-n) corresponding to the PMT (10-1 ∼ 10-n) are entered into a system controller (26) after being subjected to predetermined analog signal processing. The system controller (26) calculates a gain correction value and an offset correction value on the basis of initial correction values and output values of the preamplifiers (15-1 ∼ 15-n), whereby gain control and offset control can be performed stably even in radiation measurement.
Inventors
- 👤 Tsutomu Intellectulal Property Division Yamakawa
- 👤 Hiroaki Intellectulal Property Division Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:48
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/208; G01J; G01J1/00; G01J1/10; G01J1/16; G01J1/18; G01J1/02; G01J1/08; G01J2001/086; G01J1/42; G01J1/44; G01J2001/4406; G01J2001/4446; G01J2001/4453
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A system for controlling a gain and offset in a radiation measurement apparatus, the system comprising: generating means for generating a standard light; converting means for converting a light into an electric signal; monitoring means for monitoring the converted electric signal, and detecting a voltage value of the monitored electric signal when the monitored electric signal includes an electric signal corresponding to the standard light; and controlling means for controlling the gain and the offset in the radiation measurement apparatus by obtaining a gain correction value and an offset correction value in accordance with the detected voltage value and an initial voltage value.
Claim 2
Independent Claim
103 words
A system for controlling a gain and offset in a radiation measurement apparatus, the system comprising: generating means for generating a standard light; converting means for converting a light into an electric signal; monitoring means for monitoring the converted electric signal, and detecting a voltage value of the monitored electric signal when the monitored electric signal includes an electric signal corresponding to the standard light; and controlling means for controlling the gain and the offset in the radiation measurement apparatus by obtaining a gain correction value and an offset correction value in accordance with the detected voltage value and an initial voltage value.
Claim 3
Dependent Claim
37 words
The system according to the claim 1, characterized in that the monitoring means includes: means for integrating the electric signal; and means for comparing a voltage level of the integrated electric signal with a predetermined voltage level.
Claim 4
Dependent Claim
19 words
The system according to claim 1, characterized in that the generating means includes at least one light emitted diode.
Claim 5
Dependent Claim
17 words
The system according to claim 1, characterized in that the converting means includes a plurality of photomultipliers.
Claim 6
Independent Claim
94 words
A method for controlling a gain and offset in a radiation measurement apparatus, the method comprising the steps of: generating a standard light; converting a light into an electric signal; monitoring the converted electric signal, and detecting a voltage value of the monitored electric signal when the monitored electric signal includes an electric signal corresponding to the standard light; and controlling the gain and the offset in the radiation measurement apparatus by obtaining a gain correction value and an offset correction value in accordance with the detected voltage value and an initial voltage value.
Claim 7
Independent Claim
94 words
A method for controlling a gain and offset in a radiation measurement apparatus, the method comprising the steps of: generating a standard light; converting a light into an electric signal; monitoring the converted electric signal, and detecting a voltage value of the monitored electric signal when the monitored electric signal includes an electric signal corresponding to the standard light; and controlling the gain and the offset in the radiation measurement apparatus by obtaining a gain correction value and an offset correction value in accordance with the detected voltage value and an initial voltage value.
Claim 8
Dependent Claim
36 words
The method according to the claim 5, characterized in that the controlling step includes the steps of: integrating the electric signal; and comparing a voltage level of the integrated electric signal with a predetermined voltage level.
References Cited (Backward Citations)
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