Schneider Electric Sa

Jean-Bernard Givet

Security assembly particularly for electrosensitive protection equipment

An improved light barrier optical module including a system of one or more light blocking partitions. The partitions have different sized orifices configured to reduce the effects of parasitic light rays which would otherwise interfere with the reliable operation of the module. The module is suitable for both the transmission and reception of light barrier beams and for production using injection molding.

Light barrier optical module

An optical barrier is provided by an optical barrier unit that is made up of one or more emitter element modules and one or more receiver element modules. The emitter modules present are controlled by a control circuit to emit modulated beams encoded in a particular manner. In this regard, a particular beam of each emitter module is encoded with one of a pair of unique words that both indicate the identity of the module emitting that beam and further indicate a different binary word value depending on which of the pair is used as part of a further code that will identify the barrier unit. If more than one emitter module is part of the optical barrier, a corresponding number of particular beams, one for each emitter module present, are modulated with appropriate ones of other pairs of unique words to both identify those modules and to provide the proper binary word value as a further part of the optical barrier unit's identification number. The other beams of all of the one or more modules present are modulated with one of two other code words that indicate the high and low binary word values needed to complete the identification number of the optical barrier unit. This permits modules to exchange coded words that identify the barrier unit as well as identifying the modules being used, where the presence of the unique words that indicate the identity of the particular module emitting that particular modulated beam permits synchronization since the receiving element or elements in a particular receiving module intended to receive that particular modulated beam encoded with the identification number for the emitting module are known and what these elements or element actually receives as a modulated beam is easily determined.

Optical barrier formed of a set of optical emitter and receiver elements

An optical safety barrier is connected to a fixed object such as a wall, a framework or other structure. The barrier includes several elements including a unit that has opposite ends and that is configured to form a protective beam which sets off an alarm if the beam is penetrated by an intrusion. An L-shaped upper support and an L-shaped lower support are configured to rotate the unit about a longitudinal axis. The lower support is able to slide longitudinally so as to enable the unit to be installed and removed. An upper end cover is arranged below the upper support and a lower end cover is arranged above the lower support. The covers hold the opposite ends of the unit. A display and dialogue unit is positioned adjacent to the beam of the unit.

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Corenc, France

Jean-Bernard Givet