Magnetic-type of analog distance sensor having a hall effect sensing element

US4665362A · kind A · utility

Assignee

• WABCO Westinghouse Fahrzeugbremsen GmbH · DE

Inventors

• Joachim Abel · Hannover, DE
• Detlev Neuhaus · Hannover, DE
• Karl Hesse · Sarstedt, DE
• Michael Muller · Harper Woods, US
• Wolfgang Lichtenberg · Hannover, DE

Key dates

• Filing date: Feb 27, 1985
• Grant date: May 12, 1987
• Expiry date: Feb 27, 2005

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/147
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to an analog non-contact distance sensor which includes a fixed stationary annular magnetized armature. The stationary armature member is provided with an air gap into which is disposed an element which is sensitive to a magnetic field. The moving portion is a rod-shaped magnetic core member which can be inserted into the annular armature member. Depending on the depth of insertion of the core member, the amount of diversion of the magnetic field from the air gap of the armature is controlled. Consequently, the magnetic sensing element emits an electrical signal which corresponds to the distance travelled by the movable core member.