Modular waveguide assembly for a position sensor and method for making the same

US6232769A · kind A · utility

Assignee

• BALLUFF GMBH · DE

Inventors

• Arwed Brunsch · Stuttgart, DE
• Ernst Ehling · Bad Liebenzell, DE
• Martin Kurz · Rappoltshofen, DE
• Jürgen Petrik · Stuttgart, DE

Key dates

• Filing date: Jun 16, 1998
• Grant date: May 15, 2001
• Expiry date: Jun 16, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/485
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A modular waveguide assembly for use in a position sensor promotes efficient manufacturing, and can be tested and handled separately from the electronics module of the sensor. The waveguide assembly includes a channel having an opening extending along its length, a waveguide located within the channel, a conductor located within the channel, and a mode converter, such as a coil, located within the channel and positioned to generate an electrical signal from a signal traveling along the waveguide. A damping material can be inserted into the channel opening and around a portion of the waveguide such that the material adheres to the waveguide. In one embodiment, the damping material is at least initially partially flowable, and is then cured. A support sleeve for locating the waveguide can also be included in the assembly, and includes an elongated tubular member comprising an integral piece of flexible material and a plurality of constrictions spaced along its length for locating the waveguide and protecting it from shock and vibration. The assembly can also include a support element for connecting the coil to the electronics module of the sensor. The element can include terminals el…