Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-03-14
2006-03-14
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C356S436000, C340S619000, C073S29000R
Reexamination Certificate
active
07012272
ABSTRACT:
The invention relates to a method to optically measure the filling level of a liquid in a cavity having a sub-mm wide opening with the aid of a measuring sensor based on chromatic coding, the measuring sensor delivering a distance value and an intensity value as its output signal.The method is characterized by the steps:Recording a distance profile and an intensity profile of the surface of the liquid by moving the measuring sensor along the opening of the cavity holding the liquid, the movement being made essentially parallel to the surface of the fluid along a measurement segment x, anddetermining the filling level by means of a combined analysis of the recorded distance profile and intensity profile.
REFERENCES:
patent: 6586760 (2003-07-01), Ross et al.
Neumann Rudolf
Stoecker Stefan
Cooper & Dunham LLP
Ellis Suezu
Epps Georgia
Minebea Co. Ltd.
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