Collision sensor for detecting rear contact of an aircraft (or other type of vehicle) with the ground, uses a conical section housing which when deformed past a set value causes electrical contacts inside to be actuated

摘要

Uses conical section (11) housing (1), for two contacts, with rounded or elliptical surface (14) or elliptical base (13). An admissible non deforming force on the housing is regulated by stability calculation using finite element method. The housing contains rod (4), and in an initial position, a pin (3) is held by its end (31) at the base of the rod. The rod is rigidly fixed to the base or housing surface (13,14) opposite to the pin fixing and has support (41) for glass tube (2) The axes of symmetry of glass tube and rod cut each other at right angles. Aircraft tail strike indicator designed to detect a high inadmissible force on a support structure of vehicles. Uses a conical section housing in which are fitted two electrical contacts which close, when the housing is deformed, so that a deformation signal is transmitted. The device includes: (a) a deformable conical (11) housing (1), a median axis, which connects the centers of the base (13) and the surface envelope 914) of the cone (11). The housing being oriented in the direction of force action; A pin (3) whose end (31) is inside the housing. The pin is rigidly fixed to one of the surfaces envelopes or base (13,14), the electrical contacts inside a glass tube (2) are connected to a contact bridge (21) and maintained closed an electrical circuit. The glass tube is perpendicular to the direction of the pin (3) and transversal to its end (31); and; when the height of the cone is reduced pass a set value by a non-admissible force, the pin end (31) and the glass tube slide towards each other so that the glass tube is broken and the contact bridge (21) is separated.