Browse Prior Art Database

Sensor Flex Circuit

IP.com Disclosure Number: IPCOM000106961D
Original Publication Date: 1992-Jan-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 3 page(s) / 66K

Publishing Venue

IBM

Related People

Hansen, M: AUTHOR

Abstract

This article describes a flex circuit to eliminate exorbitant cost of fiber sensors and cost due to individual sensor cabling.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 97% of the total text.

Sensor Flex Circuit

       This article describes a flex circuit to eliminate
exorbitant cost of fiber sensors and cost due to individual sensor
cabling.

      The flex circuit has been designed to eliminate the present
usage of eight separate fiber-optic sensors.  Eight sensors are used
to determine the orientation of the ceramic greensheet that has been
picked up for transporting.  The transportation and orientation of
the greensheet requires that the sensors (wires or fiber-optic
cables) be capable of withstanding continuous bending and twisting.
Individual wires and fiber-optic cabling have shown to have a limited
usage before breakage occurs.

      The flex circuit design uses two 9 conductor retractile cables
that are capable of enduring these constant gyrations.  The
retractile cables plug into the flex circuit to make the necessary
electrical connection.  Mini-spring sockets are soldered into the
flex circuit to allow easy plug-in of the sensors.  This socket
feature allows for quick replacement of the sensor.  Fiber sensor
would require up to one hour to replace; the flex circuit sensor
would only require 3 minutes.

      The two 9-pin "D" connectors on the flex circuit (Fig. 1) are
used for the output signals of the eight sensors. The two-pin
connector supplies 5 volts and common to each sensor through their
particular resistor.  The signal circuit (Fig. 3) and the power
circuit (Fig. 2) are separate layers that are bonded together to
pr...