Capacitive displacement sensor for measuring thin targets

Details Capacitive displacement sensor for measuring thin targets Capacitive displacement sensor for measuring thin targets

2000-07-21

2002-06-04

Metjahic, Safet (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

CD10S080000

Reexamination Certificate

active

06400162

ABSTRACT:

CROSS REFERENCE TO RELATED APPLICATIONS
N/A
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
N/A
BACKGROUND OF THE INVENTION
Capacitive displacement gages provide precise measurements of distance and/or distance change. Such gages employ a capacitive displacement sensor (henceforth called the probe) whose sensing area is typically placed parallel to the target to be measured. In most applications, the area of the target is much larger than that of the probe. There are, however, applications in which the target size may be small enough to be close to the size of the capacitive sensor. Such measurements are often difficult to make by using traditional capacitance gaging systems since the output of the gage becomes sensitive to the alignment between the probe and target. It would be desirable to have a capacitive displacement sensor for measuring thin targets which is generally insensitive to the alignment between the probe and the target.
BRIEF SUMMARY OF THE INVENTION
A capacitive displacement sensor for measuring thin targets is presented. The plate of the measurement probe of the sensor is designed to take into account the thin target shape and to provide accurate measurements of the thin target by reducing lateral movement sensitivity of the plate. The probe may also include a guard to reduce or eliminate capacitive coupling of the plate with other structures which would affect the accuracy of the measurement.


REFERENCES:
patent: 4016490 (1977-04-01), Weckenmann et al.
patent: 5537109 (1996-07-01), Dowd
patent: 5691646 (1997-11-01), Sasaki
patent: 5760593 (1998-06-01), Lawrence et al.

Affiliated with

Also associated with

Rating

Capacitive displacement sensor for measuring thin targets does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Capacitive displacement sensor for measuring thin targets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitive displacement sensor for measuring thin targets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2941969