SYSTEM FOR GLOBAL AUTOMATIC MONITORING OF VEHICLES IN NORMAL AND EXTREME CONDITIONS Russian patent published in 2000 - IPC

FIELD: systems for coordinate and vehicle state monitoring in normal ("Monitoring" mode) and extreme ("Accident" mode) service conditions. SUBSTANCE: both modes are realized by a common apparatus complex, each vehicle carries an integrated-type instantaneous-action permanently operating ratio beacon, whose signals are retransmitted via geostationary integrated-type artificial earth satellites to the ground data acquisition points conjugate to them, also of the integrated type. At a rise of extreme conditions on the vehicle transmission of information from the ratio beacon is accomplished practically uninterruptedly by packets of signals with intervals between them up to 1 second in a narrow frequency band of 400 MHz, specially allotted for transmission of emergency signals via the artificial earth satellites, and in normal conditions-in the adjacent narrow frequency band with intervals between the packets exceeding 10 seconds. The system is characterized by the fact that its response time (0.5 s) is by and order of magnitude lower of even the quickest fatal air accidents (5 seconds). The time of search of the points of rise of the extreme conditions is reduced by a factor of 2-3, and in normal conditions the system capacity increases by a factor of 1-2. An additional increase of the system capacity by 20 to 30 times is ensured due to the fact that the packets of information from the ratio beacons positioned on each group of vehicles and operating in the same ratio channel are transmitted synchronously (in an organized manner) one after another ins mall time intervals (up to 0.1 s), synchronization is ensured by high-accuracy time marks (up to 0.5 ms) discriminated by the radio beacon receivers from navigation signals of satellite systems GPS and/or GLONASS. EFFECT: enhanced efficiency. 2 cl, 2 dwg