| 摘要 |
FIELD: transport. ^ SUBSTANCE: invention relates to transport, particularly, to antitheft devices. Proposed system consists of hardware installed on vehicle and receiver hardware arranged aboard aircraft. The former comprises power supply, current limiting resistor, remote switch with two anti-phase windings, LED, hermetic contact, ignition key, intermittent signal generator, electromagnetic relay, master oscillator, phase manipulator, transmitter and receiving aerial. Receiver unit, arranged aboard the aircraft, comprises five receiving aerials, search unit, three local oscillators, seven mixers, six 1st intermediate frequency amplifiers, detector, two spectrum width metres, frequency doubler, comparator, two threshold units, delay line, three keys, frequency metre, six registration units, 2nd intermediate frequency amplifier, frequency detector, trigger, four multipliers, four narrow-band filters, four phase metres, correlator, two subtractors and two adders. Highjacked vehicle direction finding is performed using a phase method. Two measuring bases are formed in every azimuthal and elevation planes. ^ EFFECT: higher accuracy of direction finding. ^ 5 dwg |
