| 摘要 |
PURPOSE:To obtain an azimuth signal corresponding to the exact advancing direction of a vehicle, etc., by operating and storing the extent of distortion of a signal having an orthogonal component from an azimuth detecting part in case when the vehicle, etc. is rotated by one turn, and compensating an output signal of the azimuth detecting part. CONSTITUTION:A magnetic field in a magnetic core 1c is varied in accordance with the sum of horizontal component force H of terrestrial magnetism applied on an azimuth detecting sensor 10, and horizontal component force (h) of distortion of terrestrial magnetism, outputs (x), (y) of an azimuth detecting part 1 in case when a vehicle is rotated by one turn are continuously read by an operating part 2 when a switch 3 is turned on, the extent of movement of an original point is stored from its maximum value and minimum value, and also deciding levels LH, LL of correcting outputs x', y' of the detecting part 1 after the distortion is compensated are calculated and stored. Also, the operating part 2 reads the outputs (x), (y) of the detecting part 1 when the switch 3 is not turned on, subsequently, calculating x' and y' to derive a level Li, and comparing the result with the levels LH, LL, and flickering an LED5 in accordance with the result of comparison, outputs an abnormal state alarm, and also outputs an azimuth signal (theta) corresponding to an advancing azimuth of the vehicle. |
