Data processing: measuring – calibrating – or testing – Measurement system – Orientation or position
Reexamination Certificate
2006-06-06
2006-06-06
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Orientation or position
C702S094000, C702S151000
Reexamination Certificate
active
07058538
ABSTRACT:
A method for determining the stroke end instant of the shutter during the deactivation phase of an electro-valve. The method comprises the following steps: assessment of nominal deactivation time and deduction from time of the assessed instant in which the deactivated shutter reaches the stroke end position, application of an appreciable current flow through the coil during shutter motion, after coil deactivation, adjusted in a time range comprising the assessed nominal deactivation instant, acquisition of a convenient number of current samples, identification of two adequate interpolation curves for acquired data, which approximate the development of the samples acquired before and after the instant in which the shutter reaches the stroke end, respectively, determination of the intersection point of the interpolation curves, from which the intersection instant can be inferred, and identification of shutter stroke end instant with the intersection instant.
REFERENCES:
patent: 5245501 (1993-09-01), Locher et al.
patent: 5271667 (1993-12-01), Takata et al.
patent: 5825216 (1998-10-01), Archer et al.
patent: 5995356 (1999-11-01), Glavmo et al.
patent: 2002/0100442 (2002-08-01), Takahashi et al.
patent: WO 94/13991 (1994-06-01), None
Pisoni Alberto
Traversa Piergiacomo
Bui Bryan
C.R.F. Societa Consortile per Azioni
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