Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1985-10-21
1987-12-15
Levy, Stewart J.
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
73510, 73517AV, G01P 904, G01P 1510
Patent
active
047124261
ABSTRACT:
A system for determining angular rate of rotation of a body about a rate axis. In one arrangement, the system comprises first (10) and second (12) accelerometers, movement apparatus and processor. The first and second accelerometers have their sensitive axes (16, 18) parallel to a sensing axis that is in turn perpendicular to the rate axis. The first and second accelerometers produce first and second output signals (a.sub.1, a.sub.2), each output signal having a frequency corresponding to the acceleration experienced by the respective accelerometer along its sensitive axis. The movement apparatus includes a generator (68) for producing a periodic movement signal and a mounting system (14) responsive to the movement signal for periodically moving the accelerometers along a movement axis perpendicular to the rate and sensing axes, such that each output signal includes a periodic Coriolis component. The processor includes a device (75) for producing a reference signal that defines one or more first time periods during which the Coriolis components have one polarity and one or more second time periods during which the Coriolis components have the opposite polarity. The first and second time periods together span one or more complete periods of the movement signal. The processor further comprises counters (71, 72) for determining, for each output signal, a phase value representing the difference between the phase change of the output signal during the first time periods and the phase change of the output signal during the second time periods. The processor further includes a microprocessor (80) for determining from the phase values a value representing the angular rate of rotation of the body about the rate axis. In a second arrangement, a single accelerometer is periodically moved along the movement axis.
REFERENCES:
patent: 3842681 (1974-10-01), Mumme
patent: 4386535 (1983-06-01), Albert
patent: 4590801 (1986-05-01), Merhav
Chapman, Jr. John E.
Levy Stewart J.
Sundstrand Data Control Inc.
LandOfFree
Synchronous FM digital detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synchronous FM digital detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronous FM digital detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1212880