Improvements in Data Processing from a Doorway Monitor

摘要

New processing techniques for the data coming from a doorway monitor have been studied. The principles taken into account are as follows: 1) use of a first order recursive filter, 2) integration of the signal with respect to time, 3) parabolic smoothing, 4) use of statistical tests. These methods are tested by means of a SIRIUS I (VICTOR SI) computer in order to select the best one for a given use. The numeric values used for these calculations are synthetized by the same computer. This procedure allows to avoid the drawbacks inherent to the use of a nuclear radiation detector: changes in the mean background value, inaccuracy of the reproductivity of the measuring geometry, variations in analogic electronic circuits. All these methods allow to increase the efficiency of a doorway monitor with reference to that obtained by the usual method of alarm threshold. The recursive filter method which can be optimized in terms of crossing speed seems to be the most promising. (ERA citation 11:040052)