Multifunction sensor using thin film transistor transducers

Details Multifunction sensor using thin film transistor transducers Multifunction sensor using thin film transistor transducers

1982-05-03

1984-07-03

Gill, Jr., James J.

Measuring and testing

Speed, velocity, or acceleration

Response to multiple sensing means or motion conditions

73504, 73517R, G01P 1514, G01P 1508

Patent

active

044571739

ABSTRACT:
A multifunction sensor provides two axes of angular rate and two axes of ear acceleration information from a single instrument. The multifunction sensor utilizes an air bearing rotor to support the spinning transducers. Angular rate measurements are made by utilizing two thin film transistors mounted on the rotor and oriented to sense strain about axes in a first plane orthogonal to the rotor spin axis. The two transducers output signals are summed to provide common mode rejection. A second set of thin film transistors are mounted on the rotor in a second plane orthogonal to that of the first set of transistors and oriented to sense strain along the axes orthogonal to the rotor spin axis. Two axes of acceleration can be measured by integrating this output signal at the proper time using a clock frequency. Angular rate and linear acceleration signals may be extracted from the rotating member via slip ring contacts or inductive pickoffs. These AC signals are amplified and demodulated to provide voltages which are proportional to angular rate and linear acceleration.

REFERENCES:
patent: 2716893 (1955-09-01), Birdsall
patent: 3273397 (1966-09-01), Forward
patent: 3559492 (1971-02-01), Erdley
patent: 3842681 (1974-10-01), Mumme
patent: 4311046 (1982-01-01), Pittman

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