Title:
DEVICE FOR DETECTING AXIAL MOVEMENT OF ROTARY MEMBER
Document Type and Number:
Japanese Patent JPS6282302
Kind Code:
A
Abstract:
A device for detecting axial movement of a rotating member, for example a compressor rotor of a gas turbine engine, comprises a conducting wire spaced radially from the rotating member, and a magnet carried by the rotating member passes in proximity to the conducting wire when the rotating member is rotating. The conducting wire has a first limb a second limb and a third limb extending with axial and circumferential components, the first and third limbs extending in the circumferentially opposite direction to the second limb to increase resolution between pulsed e.m.f.'s produced when the magnet crosses the limbs. The first, second and third limbs are each formed from a pair of parallel connected bars to produce positive and negative pulsed e.m.f.'s which form zero crossing points which are more easily detected. This enables operation at greater radial clearance or lower rotating speeds.
Inventors:
PIITAA ROFUTASU
Application Number:
JP21137986A
Publication Date:
April 15, 1987
Filing Date:
September 08, 1986
Export Citation:
Assignee:
ROLLS ROYCE PLC
International Classes:
G01B7/00; F01D5/00; G01B7/02; G01B7/14; G01M15/14; (IPC1-7): F01D5/00; G01B7/00; G01M15/00
Attorney, Agent or Firm:
Kyozo Yuasa