| 摘要 |
PURPOSE:To make it possible to trace a desired radar image automatically and easily by controlling a TV camera via a pulse motor according to the relative azimuth of an antenna agreeing with a set relative azimuth. CONSTITUTION:A relative azimuth set on azimuth scale plate 7 is applied to comparator circuit 11 via A/D converter 10. On the other hand, the differential output of differentiation circuit 5 generated once according to the rotation of an antenna of one degree with the stern of a warship set to a reference aximuth of zero degree is counted by counter circuit 6 and the applied to circuit 11. When both the inputs agrees each other, FF12 is inverted by the coincidence output generated by circuit 11 and switch SW2 is closed. Consequently, digital data equivalent to an relative aximuth angle when antenna 1 agrees with the set relative azimuth is latched by latch circuit 14 and pulse motor 17 is driven via azimuth control circuit 16 according to a difference with pervious latch data by subtracter circuit 15, so that TV camera 18 can automatically trace a disired radar image easily by tracing a radar image in the set relative azimuth on cathode-ray tube 8. |
