Diagnostic device for use in process control system

Details Diagnostic device for use in process control system Diagnostic device for use in process control system

2007-12-20

2010-06-01

Nghiem, Michael P (Department: 2863)

Data processing: measuring, calibrating, or testing

Testing system

Of sensing device

C702S182000, C702S185000

Reexamination Certificate

active

07729876

ABSTRACT:
The diagnostic device that detects a failure of a sensor. The sensor includes memory for repeatedly recording pairs of two absolute pressure values, the absolute pressure values being related to absolute pressures in the first and the second impulse lines, respectively. A processor repeatedly computes, from a prescribable number of pairs of the two absolute pressure values, a correlation value representative of the correlation between the two absolute pressure values. The processor can also compare correlation values to at least one correlation threshold value, and generate a diagnostic output depending on the result of the comparison. It is possible to derive the absolute pressure values from one differential pressure measurement and one absolute pressure measurement.

REFERENCES:
patent: 5680109 (1997-10-01), Lowe et al.
patent: 7177756 (2007-02-01), Moninger
patent: 7212953 (2007-05-01), Artiuch
patent: 2002/0029130 (2002-03-01), Eryurek et al.
patent: 2002/0144674 (2002-10-01), Wang et al.
patent: 2004/0111193 (2004-06-01), D'Ouince et al.
patent: 2006/0287806 (2006-12-01), Hori
patent: 2008/0033693 (2008-02-01), Andenna et al.
patent: WO 2004/033882 (2004-04-01), None
patent: 2006-136036 (2006-12-01), None
Notification Concerning Transmittal of International Preliminary Report on Patentability (Form PCT/IB/326), International Preliminary Report on Patentability (Form PCT/IB/373) and Written Opinion of the International Searching Authority (Form PCT/ISA/237), issued by the European Patent Office in corresponding International Patent Application No. PCT/CH2005/000345, Jan. 10, 2008, Rijswijk, NL.
PCT/ISA/210, PCT/ISA/220 and PCT/ISA/237, Jun. 3, 2006.
Translation of Chinese Office Action Filed Nov. 17, 2009.

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