METHOD OF RADIO SEARCH AND INTERCEPTION OF HIGH-JACKED VEHICLES Russian patent published in 2005 - IPC

FIELD: transport engineering; security systems.

SUBSTANCE: security alarms reveal intrusion of criminal into vehicle and form alarms messages by which high frequency signals are modulated. The latter are transmitted by retransmission-radio direction finding network and by standard cellular mobile communication network to dispatcher center. Test signals confirming communication with of vehicle with dispatcher center are received on high-jacked vehicle by standard cellular network. Alarm messages are selected and processed in dispatcher center, identification signs of high-jacked vehicle and its location are determined and initial and current external target designations are transmitted to security hazard express vehicle and, if necessary, movement of high-jacked vehicle is blocked. When messages are transmitted by retransmission-radio direction finding network, coincidence of messages transmitted and received by radio are checked on board the high-jacked vehicle. In case of no coincidence, signal of interruption of reception by retransmission-radio direction finding network is formed. When test signals are received by standard cellular network on high-jacked vehicle, mean signal/noise ratio for preset internal is determined and compared with preset threshold, and if they drop to threshold level with simultaneous interruption of reception by retransmission-radio direction finding network, high-jacked vehicle interlock units are acted upon to stop the vehicle. Object terminal generates alarm signals which are taken by security hazard express vehicle. Bearings and external target designations are used to control movement of security hazard express vehicle at intercepting high-jacked vehicle.

EFFECT: improved efficiency of interception even if high-jacked use vehicles.

3 cl, 7 dwg