| 摘要 |
PURPOSE:To detect an invariably correct azimuth by fitting a tilt angle detection sensor in a direction wherein a moving body is easy to slant and correcting its tilt angle with its output. CONSTITUTION:An azimuth sensor consists of a bottle-shaped core 1, an exciting coil 2 wound in a troidal shape, and secondary detection coils 3 and 4 which corresponding to two X and Y directions as to detect the azimuth. The coils 3 and 4 are set on a horizontal plane at 90 deg. so that the axis of one coil is in the moving direction of a car body. Thus, signals corresponding to the X and Y directions are obtained and passed through detectors 11 and 12 and integrators 13 and 14, whose outputs are amplified by amplifiers 15 and 16; and their amplification outputs are inputted to a CPU 19 through an A/D converter 17 and the output of the tilt angle sensor 22 is also inputted to the CPU 19 from the A/D converter 17 to operate the azimuth after the tilt angle is corrected, thereby detecting the correct azimuth.
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