Method for detecting an output of a gyroscope with dual synchron

Details Method for detecting an output of a gyroscope with dual synchron Method for detecting an output of a gyroscope with dual synchron

1994-02-17

1995-05-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73505, 310316, G01D 534

Patent

active

054122040

ABSTRACT:
Two piezoelectric elements (16a), (16b) for detecting of a vibratory gyroscope (12) are connected to a first differential amplifier circuit (38) and a summing circuit (46). An output of the first differential amplifier circuit (38) is detected in synchronous with a feedback signal of the vibratory gyroscope (12) by a first synchronized detection circuit (40), and further smoothed by a first smoothing circuit (44). The output signal of the first differential amplifier circuit (38) is detected in synchronous with an output signal of a phase correction circuit (48) by a second synchronized detection circuit (42), and further smoothed by a second smoothing circuit (50). By a level adjusting circuit (52), it is adjusted that a drift component of an output signal of the first smoothing circuit (44) and a drift component of an output signal of the second smoothing circuit (50) are the same level. A difference between the output signal of the first smoothing circuit (44) and an the output signal of the level adjusting circuit (52) is obtained by a second differential amplifier circuit (54). Furthermore, the output signal of the first differential amplifier circuit (38) may be detected in synchronous with an output signal of the summing circuit (46), smoothed and applied to the level adjusting circuit (52).

REFERENCES:
patent: 5272922 (1993-12-01), Watson
patent: 5349857 (1994-09-01), Kasanami et al.

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