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Azimuth determinating apparatus

  • US 4,413,424 A
  • Filed: 10/16/1981
  • Issued: 11/08/1983
  • Est. Priority Date: 10/20/1980
  • Status: Expired due to Term
First Claim
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1. An azimuth determining apparatus including an azimuth sensor provided on a moving body for sensing a direction of said moving body relative to earth'"'"'s magnetism to produce two direction component signals crossed at the right angles and means for comparing the two direction component signals from said azimuth sensor with two reference signals, respectively, to display a moving direction of said body, the apparatus comprising:

  • an adjusting circuit including a first inverting amplifier having a non-inverting input receiving a reference signal from first adjusting means and an inverting input receiving one of said detection signals from said azimuth sensor, and a second amplifier having a non-inverting input receiving a reference signal from inverting second adjusting means and an inverting input receiving the other detection signal from said azmuth sensor; and

    an indicating circuit including a first comparator having an inverting input receiving the output signal from said first inverting amplifier and a non-inverting input receiving a first predetermined reference signal, a second comparator having an inverting input receiving a second predetermined reference signal and a non-inverting input receiving the output signal from said first inverting amplifier, a third comparator having an inverting input receiving the output signal from said second inverting amplifier and a non-inverting input receiving said first predetermined reference signal, a fourth comparator having an inverting input receiving said second predetermined reference signal and a non-inverting input receiving the output signal from said second inverting amplifier, first light emitting means responsive to the output signals of said first and second comparators for indicating correct adjustment of said one direction component, and second light emitting means responsive to the output signals of said third and fourth comparators for indicating correct adjustment of said other direction component.

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