Radiation meter, especially X-radiation sensor for measuring personnel dose rates, etc., has an absorbed dose calculation that accommodates instrument drift, non-linearities, etc. so that periodic calibration is not required

摘要

Method for determining the amount of radiation absorbed (x(t)) by a radiation sensor (10) based on the output signal (o(t)) of the sensor at a first time point (t1). Accordingly a primary characteristic of the sensor is measured which represents the dependence of the output signal on the absorbed radiation and a secondary characteristic is measured which represents dependence of the output signal on an internal signal of the radiation sensor at second and third time points (t2, t3). Finally an approximation value for the measured radiation is determined as a function of the two determined characteristics and the output signal. Changes in the response to the internal signal can be determined at times at which there is no external radiation source. The invention also relates to a corresponding radiation sensor for measuring radiation using the inventive method for determining an output radiation value.