Aisin Seiki Kabushiki Kaisha

Allegro Microsystems, LLC

Hidenobu Muramatsu

Takashi Hara

Koji Kawasaki

Glenn A Forrest

Kazuhiro Kamiya

Kenichi Taguchi

Naota Nakayama

Hitoshi Yabusaki

Takanori Noda

Gota Uehara

A rotation angle detection device for a vehicle brake includes: a housing accommodating a magnetic detection unit; a rotation member supported to be rotatable relative to the housing; and a magnet held by the rotation member and rotating integrally with the rotation member, in which the magnetic detection unit includes a stroke detection unit and a switch detection unit, the stroke detection unit detects a rotation angle by which the rotation member has rotated from a reference position based on a magnetic force of the magnet, the switch detection unit detects that the rotation member has rotated from the reference position by a predetermined angle or more, and at least a portion of the stroke detection unit is disposed at a position where the portion overlaps with the magnet in an axial direction of a rotational axis of the rotation member.

Rotation angle detection device for vehicle brake

A wheel speed sensor capable of stabilizing a projecting posture of a sensor unit when attached to a vehicle is provided. The wheel speed sensor includes a mounting base providing a first contacting part and a second contacting part when attached to the vehicle to come into contact with the vehicle at two positions of the first contacting part and the second contacting part, the sensor unit projecting from a position between the first contacting part and the second contacting part and inclining toward the first contacting part, the sensor unit being resin molded integrally with the mounting base and including a signal detection device provided in a distal end of the sensor unit, and a fixing member pressing and fixing the mounting base to the vehicle at a position between the first contacting part and the sensor unit.

Wheel speed sensor

A rotation sensor includes a detecting portion, a rotational state determining portion and a pulse generating portion. The detecting portion detects a rotation of a rotational member and outputs a detection signal. The rotational state determining portion determines a rotational state of the rotational member on the basis of the detection signal in a predetermined period. The pulse generating portion generates and outputs a first pulse and a second pulse, of which waveforms differ from each other, in response to a rotational direction of the rotational member after the predetermined period. The pulse generating portion further generates and outputs a third pulse regardless of the rotational state of the rotational member in the predetermined period.

Rotation sensor

A rotation detecting sensor includes a magnetic element group include at least three magnetic elements each of which detects rotations of a rotary body that includes a magnetic body, output portions each for outputting a signal generated at each of the magnetic elements to an outside, and element selecting means for selecting arbitrary two magnetic elements from the magnetic element group and applying the generated signal to the two output portions.

Rotation detecting sensor

Growing community of inventors

Kariya, Japan

Hidenobu Muramatsu