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FIBER OPTIC SOLUTION TO MULTIFUNCTION STEERING COLUMN CONTROLS

IP.com Disclosure Number: IPCOM000006493D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2002-Jan-09
Document File: 1 page(s) / 63K

Publishing Venue

Motorola

Related People

David D. Hanson: AUTHOR [+2]

Abstract

The problem was presented as the need for a cus- tomer to replace the ever increasing weight and com- plexity of the cabling for~the automotive steering column with a light weight simple method. This also needed to be done in a manner that was cost competitive with the current method of using copper wires to transmit all electrical signals. and detector pair. Again no physical connection is made to the turn signal lever arm. This method uses thm holes in the lever arm to transmit the light from the input fiber to the output fiber. The way of differentiating left from right is through the use of an attenuating material placed in one of the thou holes. This provides a signal level difference at the detector which can be used to indicate the right or let? turn signal needs to be actuated.

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MOTOROLA INC. Technical Developments Volume 16 August 1992

FIBER OPTIC SOLUTION TO MULTIFUNCTION STEERING COLUMN CONTROLS

by David D. Hanson and Damon L. Morgan

  The problem was presented as the need for a cus- tomer to replace the ever increasing weight and com- plexity of the cabling for~the automotive steering column with a light weight simple method. This also needed to be done in a manner that was cost competitive with the current method of using copper wires to transmit all electrical signals.

and detector pair. Again no physical connection is made to the turn signal lever arm. This method uses thm holes in the lever arm to transmit the light from the input fiber to the output fiber. The way of differentiating left from right is through the use of an attenuating material placed in one of the thou holes. This provides a signal level difference at the detector which can be used to indicate the right or let? turn signal needs to be actuated.

  The single function of operating the turn signal indi- cators was engineered first with the simplest design of replacing the copper wire with plastic fiber optic cable and an emitter coupled to two connectors. This is depicted in the drawings attached as Method A. A light guide is used to channel the light to a single output point on the turn signal pivot arm so no physical connections need to be made to the turn signal arm itself. This method required 3 fibers and does not appear to allow for increased functions such a...