Multisensor demodulator and A/D converter

Details Multisensor demodulator and A/D converter Multisensor demodulator and A/D converter

1982-10-05

1986-03-04

LaRoche, Eugene R.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329122, 329 50, 73504, H03D 300, G01P 902

Patent

active

045742456

ABSTRACT:
An apparatus and technique is disclosed for demodulating an FM signal provided as an output from a sensor assembly. The FM signal may represent acceleration as measured by a sensor included on a rotating wheel in an attitude and heading reference system. The FM signal is demodulated and directly converted to a digital value to provide digital signal processing with improved performance characteristics. The demodulation is accomplished by detecting each FM cycle to provide a signal output at the occurrence of each cycle. A reference mark on the rotating wheel is detected for providing synchronization such that a demodulation angle of the rotating wheel can be determined. The demodulation angle is represented as a sine value which is read for each FM cycle during one sensor revolution and summed with all previous sine values detected during that one revolution. A digital output of that sum is then provided as a measurement of acceleration or other parameter along an axis of the system.

REFERENCES:
patent: 4222270 (1980-09-01), Allen

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