Method and apparatus for fastener hole inspection with a capacit

Details Method and apparatus for fastener hole inspection with a capacit Method and apparatus for fastener hole inspection with a capacit

1995-06-13

1997-07-08

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324688, 324601, 73172, G01R 2726

Patent

active

056465386

ABSTRACT:
A computer-based method and apparatus for fastener hole inspection including a capacitive probe with a plurality of sensor elements, means for grounding the faster hole, and an electronics unit electrically connected to the probe for sequencially charging one of the plurality of sensor elements while applying a guard potential to the remaining sensor elements and adjacent electrical components to eliminate residual capactitances. A profile of the fastener hole is generated by evaluating, through a series resistor, the discharge waveforms of the plurality of sensor elements by converting the capacitance measurements obtained to distance measurements. A centering algorithm is employed to compensate for malalignment of the capacitive probe in the fastener hole.

REFERENCES:
patent: 4189203 (1980-02-01), Miller
patent: 4814691 (1989-03-01), Garbini et al.
patent: 4935700 (1990-06-01), Garbini et al.
patent: 4996492 (1991-02-01), Anderson
patent: 5010658 (1991-04-01), Griffith et al.
patent: 5021740 (1991-06-01), Sarr et al.
patent: 5216819 (1993-06-01), Givler
patent: 5293131 (1994-03-01), Semones et al.
patent: 5329691 (1994-07-01), Roberts et al.
Design of Algorithms to Extract Data from Capacitance Sensors to Meausre Fastener Hole Profiles, Hammond, Joseph L. Jr., et al., IEEE Transactions on Instrumentation and Measurement, vol. 1M-32, No. 2, Jun. 1983, pp. 343-349.

Affiliated with

Also associated with

Rating

Method and apparatus for fastener hole inspection with a capacit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for fastener hole inspection with a capacit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for fastener hole inspection with a capacit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2410678