| 摘要 |
PURPOSE:To obtain a circuit for enabling constant-speed rotation to be reset immediately when a driving motor comes to non-constant-speed rotation, by controlling an inverter for driving the driving motor, from a constant-speed rotation reference value and the output signal of a digital comparator for comparison and discrimination. CONSTITUTION:In a radar apparatus for rotating an antenna 1 continuously by 360 degrees with a driving motor 3, a synchronous transmitter 4 is set, and the azimuthal signal of the antenna 1 is generated. The signal is converted to digital binary azimuthal signal (a) by a synchronous digital converter 5, and in a specific azimuthal signal period, a gate circuit 6 is used, and the number of the clock pulse (b) of a pulse generator 7 is counted. The count value is compared with the constant speed rotation reference value of a reference value setting circuit 10 by a digital comparator 9. Its result is displayed by a display unit 11 and inputted to an inverter 12, and the driving motor 3 is rotated at a constant speed. |
