Fecha de publicación: 09/09/1981 Fuente: WIPO "royal booby" In order to guard against "booby trapping" of a vehicle by means of an explosive device, the vehicle is fitted with four microwave detectors, in the vicinity of each wheel arch, eight vibration detectors disposed at critical points within the vehicle, an ultrasonic detector within the passenger compartment and switches on the doors, bonnet and boot lid. The outputs of all these sensors are connected to a central microprocessor within the vehicle. In the event of the vehicle being tampered with, one or more of the sensors will be triggered, and an alarm signal will be transmitted by a v.h.f. transmitter associated with the microprocessor. This alarm signal may be picked up by a receiver at a point remote from the vehicle. A display is provided within the vehicle which is repeatedly cycled when the system is enabled, and which, when one of the sensors is triggered, continuously displays a symbol identifying the triggered sensor.