Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1996-03-08
1998-03-10
Karlsen, Ernest F.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324690, 324662, 34087037, 901 46, 901 10, G01R 2726
Patent
active
057265810
ABSTRACT:
A capacitive type proximity sensor having improved range and sensitivity between a surface of arbitrary shape and an intruding object in the vicinity of the surface having one or more outer conductors on the surface which serve as capacitive sensing elements shaped to conform to the underlying surface of a machine. Each sensing element is backed by a reflector driven at the same voltage and in phase with the corresponding capacitive sensing element. Each reflector, in turn, serves to reflect the electric field lines of the capacitive sensing element away from the surface of the machine on which the sensor is mounted so as to enhance the component constituted by the capacitance between the sensing element and an intruding object as a fraction of the total capacitance between the sensing element and ground. Each sensing element and corresponding reflecting element are electrically driven in phase, and the capacitance between the sensing elements individually and the sensed object is determined using circuitry known to the art. The reflector may be shaped to shield the sensor and to shape its field of view, in effect providing an electrostatic lensing effect. Sensors and reflectors may be fabricated using a variety of known techniques such as vapor deposition, sputtering, painting, plating, or deformation of flexible films, to provide conformal coverage of surfaces of arbitrary shape.
REFERENCES:
patent: 5166679 (1992-11-01), Vranish
patent: 5337015 (1994-08-01), Lustig
patent: 5363051 (1994-11-01), Jenstrom
Karlsen Ernest F.
Lehmann Eileen A.
Marchant Robert D.
Miller Guy M.
Solis Jose M.
LandOfFree
3-D capaciflector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with 3-D capaciflector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 3-D capaciflector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-142429