Angular acceleration sensor
AssigneeCanon Kabushiki Kaisha
InventorsTakayuki Yagi, Yutaka Hirai, Osamu Takamatsu, Masaru Nakayama, Hiroyasu Nose, Katsuhiko Shinjo, Yasuhiro Simada
Life of this patent
Estimating the term…
Abstract
An angular acceleration sensor has a weight member, a resilient member for supporting the weight member from the both sides thereof, the resilient member being disposed on a predetermined rotational axis and supporting the weight member for rotation about the rotational axis, and an opposed member opposed to the weight member, an angular acceleration applied to the weight member being detected from a variation in the spacing between the opposed member and the weight member resulting from the rotation of the weight member
Claims8
An angular acceleration sensor comprising:
- a first weight member having a first weight side electrode;
- a second weight member having a second weight side electrode, said second weight member being disposed around said first weight member;
- a first resilient member for supporting said first weight member from both sides thereof, said first resilient member being installed between said first and said second weight member, said first resilient member being disposed a first rotational axis and supporting said first weight member for rotation about said first rotational axis relative to said second weight member;
- a second resilient member for supporting said second weight member from both sides thereof, said second resilient member being disposed on a second rotational axis and supporting said second weight member for rotation about said second rotational axis;
- a first opposed electrode disposed so as to be opposed to said first weight side electrode, wherein an angular acceleration about an axis parallel to said first rotational axis is detected from a variation in electrostatic capacity corresponding to a variation in a spacing between said first opposed electrode and said first weight side electrode resulting from the rotation of said first weight member;
- and
- a second opposed electrode disposed so as to be opposed to said second weight side electrode, wherein an angular acceleration about an axis parallel to said second rotational axis is detected from a variation in electrostatic capacity corresponding to a variation in a spacing between said second opposed electrode and said second weight side electrode resulting from the rotation of said second weight member.
Dependencies are inferred from the claim text.