METHOD OF COMPENSATING FOR DRIFT IN GAS SENSING EQUIPMENT,申请号EP20010991579-传众专利搜索

METHOD OF COMPENSATING FOR DRIFT IN GAS SENSING EQUIPMENT

申请公布号：EP1350116(A1)

申请号：EP20010991579

申请日期：2001.12.28

申请公布日期：2003.10.08

申请人：

EDWARDS SYSTEMS TECHNOLOGY, INCORPORATED;NELSON, AUDREY;MADDUX, BRIAN C.;HIGGINS, DON Q.;NISBET, JEAN A.

发明人：KOUZNETSOV, ADRIAN

分类号：G01N37/00;G01N21/27;G01N21/35;G01N33/00;(IPC1-7):G01N37/00

主分类号：G01N37/00

摘要：<p>A method for compensating for baseline or span drift in gas sensing equipment includes obtaining gas concentration data over a time period and identifying a quiescent period within that time period. The method compares a component concentration corresponding to the quiescent period with one or more additional component concentrations relating to different quiescent periods and calculates an estimated background gas concentration for a predetermined number of time periods. The estimated background concentration is then compared to a preset, or expected, background concentration, and a correction value is calculated. For baseline drift, a correction value is determined to be the difference between the estimated background concentration and the present (expected) background concentration. For span drift, a correction value is determined to be the ratio of the estimated background concentration to the preset (expect) background concentration. Measured concentrations by the gas sensor are then adjusted by the correction value.</p>