DEVICE FOR ALARM SYSTEM Russian patent published in 1998 - IPC

FIELD: burglar and emergency alarms. SUBSTANCE: proposed device is intended for prevention of automobile stealing. It incorporates current generator connected to input of computer and restoring conductor anchored with first end on body and connected to ground bus and with weight on second end. Restoring conductor is made from magnetostriction alloy and is connected with second end to input of computer. Current generator is manufactured in the form of AC generator with frequency of spectral components determined by formula f<36/(μd² Hz, where μ is magnetic permeability of restoring conductor; d is thickness of restoring conductor, mm. There are envisaged variants of make of AC generator, restoring conductor and weight. EFFECT: low energy consumption, diminished dimensions, high adaptability to manufacture, high sensitivity, reliability, noise immunity, functional flexibility allowing external vibrations of any required direction to be registered , low production cost, improved operational convenience and possibility of any initial orientation of sensor. 8 cl, 2 dwg