Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1988-01-22
1990-12-11
Chapman, John
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
310329, G01P 904
Patent
active
RE0334790
ABSTRACT:
[A vibratory angular rate sensing system may have one pair of tines forming an angle of about 60 degrees, resulting from the crystalline orientation of the Z-cut quartz wafer of the system. In one configuration each of the tines is provided with a mass offset from the axis of the associated tine, a pivot extends through the plane of symmery of the tines and may be connected to a dummy reaction mass. The resonant system is suspended from a mounting frame by a pair of suspension bridges. A second embodiment of the invention features two groups of tines, each group including two pairs of tines arranged in the form of a cross. Again, an offset mass is associated with the free end of each tine and each group of tines is secured to its frame by a suspension bridge.]Vibratory angular rate sensing system having a support structure and a driven fork lying in a plane and having an axis of symmetry. The fork has first and second spaced apart tines. A mouting is provided for mounting said fork on said support structure. Energy is coupled into the driven fork to cause vibratory motion of the tines of the driven fork in the plane of the driven fork. A torsionally resonant member is coupled to the fork. A pickoff is provided which is isolated from the support structure for sensing motion of the torsionally resonant member to provide a measure of the input angular rate about the axis of symmetry of the driven fork.
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Juptner William F.
Macy David F.
Staudte Juergen H.
Chapman John
Piezoelectric Technology Investors
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