MULTIARRAY SENSOR AND PHENOMENON DISCRIMINATING METHOD USING THIS

摘要

PROBLEM TO BE SOLVED: To discriminate significance of a phenomenon in a scene by providing two rows or two rows or more of detector arrays having a different wave length response, and processing signals from elements of the respective arrays corresponding to the same part of the scene. ;SOLUTION: A scene observing multiarray sensor has, for example, a pyroelectric detector array 6 having a wide band response and a pyroelectric detector array 7 having a response restricted by band-pass filter 2. These arrays are arranged sufficiently closely and/or are formed as a structure such as the same scene is substantially made incicent on the respective arrays. When a signal exceeding a prescribed threshold value is generated to a specific element of the scene, the ratio of signals from corresponding elements of the two arrays is measured. This measurement can be quickly performed since it is typically performed only on one or a small number of elements so that for example, the presence, diffusion and the concentration of hot gas or an intruder are detected by processing a ratio value by a processor.;COPYRIGHT: (C)2000,JPO