Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-03-19
1993-03-30
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
73517AV, G01D 534
Patent
active
051986639
ABSTRACT:
In one type of an angular velocity sensor, a constant vibration is applied in an X direction to one end of a vibrator which is fixed at another end and the vibrator vibrates in a Y direction perpendicular to the X direction by an action of Coriolis force caused by the angular velocity of the vibrator about the Z axis with an amplitude proportional to an angular velocity about a Z axis. An angular velocity sensor of this invention utilizes a photoelectric encoder for measurement of the vibration amplitude of the vibrator in the Y direction. The encoder includes a main scale mounted on the free end of the vibrator; an index scale mounted on a housing of the sensor to face the main scale; and a photoelectric element for sensing light reflected from the main scale and passing through the index scale. The angular velocity sensor utilizing the photoelectric encoder is less subject to influence of variation in the temperature in comparison with the conventional sensor utilizing piezoelectric elements and a higher precision can be attained.
REFERENCES:
patent: 5001940 (1991-03-01), Ogawa
patent: 5014554 (1991-05-01), Terada et al.
patent: 5026164 (1991-06-01), Ichikawa
patent: 5057686 (1991-10-01), Hikawa et al.
patent: 5067816 (1991-11-01), Ichikawa
patent: 5134283 (1992-07-01), Shiozawa
Horikawa Toshiro
Ichikawa Souji
Ishibashi Wataru
Kuroki Shingo
Suzuki Mikio
Mitutoyo Corporation
Nelms David C.
LandOfFree
Angular velocity sensor with displacement scale and sensor means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Angular velocity sensor with displacement scale and sensor means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Angular velocity sensor with displacement scale and sensor means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1282815