| 摘要 |
PURPOSE:To prevent the degradation in wave receiving efficiency and to permit high speed swiveling by controlling directing directions always in wave transmission directions by the use of a wave transmitter and receiver provided with at least >=2 oscillators in a horizontal direction. CONSTITUTION:A wave transmitter and receiver 1 having oscillators 2a-2c disposed in a horizontal direction is swiveled by a motor 3. A detecting circuit 4 for rotating angles detects the swiveling angle of the transmitter and receiver 1 and supplies the output voltage thereof to a transmission trigger generating circuit 5, which operates the respective oscillators 2a-2c so as to transmit waves. A phase control circuit 6 consisting of an oscillator 7, phase comparators 8a-8c, low pass filters 9a-9c, oscillating circuits 10a-10c for controlling voltage and adders 11a-11c is provided in order to direct and control the directing directions of the received waves in an opposite direction by an angle theta, when the transmitter and receiver 1 is swiveled, for instance, by angle theta after transmitting and receiving. |
