Sensor using the capacitive measuring principle

Details Sensor using the capacitive measuring principle Sensor using the capacitive measuring principle

2007-06-20

2009-06-09

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

Reexamination Certificate

active

07545154

ABSTRACT:
The invention relates to a sensor which uses the capacitive measuring principle which is used to detect the proximity of a dielectric medium, preferably for detecting a human body part, which is used in an anti-pinching system. The sensor includes a capacitor and an evaluation electronic system. The variation of the capacity of the capacitor, which is caused by the medium, can be measured. The capacitor, which can establish a distinction between a human body part or a solid and water and/or humidity, is characterized in that the capacitor can be operated in a successive manner by at least two different frequencies and/or at least two different pulse duty factors by using the different ratio of said elements in a variable electric field. The invention also relates to a corresponding method.

REFERENCES:
patent: 5874672 (1999-02-01), Gerardi et al.
patent: 6346819 (2002-02-01), Joss et al.
patent: 6377009 (2002-04-01), Philipp
patent: 6977511 (2005-12-01), Patel et al.
patent: 7378857 (2008-05-01), Franke et al.
patent: 2002/0067631 (2002-06-01), Lunding et al.
patent: 1 154 110 (2001-11-01), None
patent: WO 2004/038149 (2004-05-01), None
International Preliminary Report on Patentability from PCT Appl. No. PCT/DE2005/002105, issued Jun. 26, 2007.

Affiliated with

Also associated with

Rating

Sensor using the capacitive measuring principle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sensor using the capacitive measuring principle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensor using the capacitive measuring principle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4060339