Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1989-01-12
1990-07-17
Chapman, John
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
73516LM, G01P 900
Patent
active
049413538
ABSTRACT:
A hermetic tubular casing hermetically containing a gas substantially at the atmospheric pressure is mounted on a mobile object, such as a vehicle, and is provided with a needle electrode at one end thereof and a pair of adjacent semicircular plate electrodes at the other end thereof. A high-voltage power supply applies a high voltage across the needle electrode and the plate electrodes to generate an ionic wind flowing from the needle electrode toward the plate electrodes by producing a corona discharge around the needle electrode. An arithmetic unit detects the difference between ionic currents flowing respectively through the pair of plate electrodes and each corresponding to the number of ions fallen on the corresponding plate electrode. The ionic wind is deflected under the action of a Coriolis force as the mobile object revolves entailing variation in the quantity of ions falling on each plate electrode. The difference between the ionic currents varies in proportion to the angular velocity of the mobile object.
REFERENCES:
patent: 3360677 (1967-12-01), Stocker et al.
patent: 3910122 (1975-10-01), Evans et al.
patent: 4393707 (1983-07-01), Ferrar
Fukatsu Yoshiaki
Matsui Kazuma
Nomura Etsuji
Chapman John
Nippondenso Co. Ltd.
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