Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2006-06-13
2008-09-09
Epps, Georgia Y. (Department: 2878)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S676000, C073S30400R, C073S30400R
Reexamination Certificate
active
07423436
ABSTRACT:
A device for measurement and detection of the level of a medium in a container with a sensor element, with a reference element and an electrical circuit which contains at least one AC voltage source and an evaluation unit, the sensor element and the reference element being arranged such that the medium to be measured or detected influences the impedance between them. The capacitive level measurement and detection device has an AC voltage source that supplies a high-frequency voltage or a voltage with high frequency voltage portions. The circuit which has the AC voltage source, the sensor element and the reference element has an impedance which is as low as possible. The electrical circuit can have an amplifier, a timer, a pulse shaper, a first synchronous rectifier, a first I/U converter, a microcontroller, a reference impedance, a second synchronous rectifier and a second I/U converter.
REFERENCES:
patent: 3723845 (1973-03-01), Duckworth
patent: 4588858 (1986-05-01), Watts et al.
patent: 4860755 (1989-08-01), Erath
patent: 5818241 (1998-10-01), Kelly
patent: 6194903 (2001-02-01), Schulz
patent: 6225710 (2001-05-01), Palata et al.
patent: 6295874 (2001-10-01), Strutt et al.
patent: 6782747 (2004-08-01), Gundlach et al.
patent: 6823730 (2004-11-01), Buck et al.
patent: 2001/0037680 (2001-11-01), Buck et al.
patent: 2004/0229582 (2004-11-01), Miyasita et al.
patent: 2004/0263187 (2004-12-01), Hayashi et al.
patent: 38 12 687 (1989-10-01), None
patent: 195 02 195 (1996-08-01), None
patent: 101 53 298 (2003-05-01), None
patent: 101 55 131 (2003-05-01), None
patent: 102 50 523 (2003-07-01), None
Bernd Francesco
Gundlach Jochen
Hoch Werner
Epps Georgia Y.
i f m electronic GmbH
Legasse Jr. Francis M
Safran David S.
LandOfFree
Capacitive level measurement and detection device using high... 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 level measurement and detection device using high..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitive level measurement and detection device using high... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3991366