Browse Prior Art Database

Normal Force Measurement Instrument for Connectors

IP.com Disclosure Number: IPCOM000122748D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 48K

Publishing Venue

IBM

Related People

Baska, DA: AUTHOR [+6]

Abstract

A contact normal force measurement device using an inductive motion transducer and a calibrated spring is described.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 99% of the total text.

Normal Force Measurement Instrument for Connectors

      A contact normal force measurement device using an inductive
motion transducer and a calibrated spring is described.

      A normal force measurement instrument uses two transducers
which translate mechanical movement into frequency changes to achieve
the resolution that is necessary to measure the normal contact force
of contact springs.

      The instrument shown in the figure is made of probe tip 1 that
is extended into two levers 2 and 3 that are hinged by a precision
joint 4.  The transducer coil 5 is part of the oscillator 6 of which
the frequency change is directly related to the mechanical
displacement of the probe tip 1. The frequency change of the
transducer oscillator 6 is translated into contact gap displacement
using a calibration procedure.

      A micrometer screw 7 displaces a force calibrated spring 8,
that pushes against the hinged lever 3 and thereby causes the probe
tip 1 to open.  The displacement of the micrometer screw 7 is
measured by the transducer coil 9, which is part of the oscillator 10
of which the frequency change is directly related to the displacement
of the spring that is required for a certain contact spring gap.  The
frequency change of transducer oscillator 9 is calibrated into grams
of force.

      A microprocessor may be used for automatic calibration and
direct digital read-out of force in grams and displacement in
micrometers.

      Disclosed ano...