ALARM DEVICE DISTINGUISHING BETWEEN LAWFUL OCCUPIER AND INTRUDER

摘要

The subject matter of the invention is an opening detection device tor an opening element such as a door or window (21, 22) including a module (510) that is applied to an inner side of said opening element, characterized in that the module includes means (511, 520, 521) for detecting movement of said opening element, first presence detection means forming a conical beam (221) defming what is tenned a trust perimeter encompassing an operating distance over which an operator operates the mechanism for opening (23, 24) the opening element on the first side of the opening element, second presence detection means for detecting a presence on what is tenned a mistrust perimeter (215) circumscribed around the opening element and means (513) for processing data from said detection means, for memory storage and for computation that are connected to said detection means.