Pyrotechnic devices used for signaling the presence of dangerous substances in a vehicle after a collision, has additional electric energy source and a control system monitoring electric liaison as well as the electric voltage

摘要

Command system includes an electric energy source (8) in addition to the battery (7), both being in series with the alimentation of the electric ignition (2). Control system (4) monitors the continuity of the electric liaison between the energy sources and the ignition as well as the electric voltage between the battery terminals. If any variable is not within predetermined limits, the alarm (5) is activated.