发明名称 |
Periodic probe mapping |
摘要 |
A method and apparatus for processing a time domain reflectometry (TDR) signal having a plurality of reflection pulses to generate a valid output result corresponding to a process variable for a material in a vessel. The method includes the steps of determining an initial reference signal along a probe, storing the initial reference signal as an active reference signal, periodically detecting a TDR signal along the probe in the vessel, and computing the output result using the TDR signal and the active reference signal. The method also includes the steps of determining an appropriate time for updating the active reference signal, automatically computing an updated reference signal at the appropriate time, and overwriting the active reference signal with the updated reference signal for use in subsequent computations of the output result.
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申请公布号 |
US6078280(A) |
申请公布日期 |
2000.06.20 |
申请号 |
US19980219787 |
申请日期 |
1998.12.23 |
申请人 |
ENDRESS +HAUSER GMBH +CO. |
发明人 |
PERDUE, KENNETH L.;MCCARTHY, WILLIAM PATRICK;CUMMINGS, DONALD D.;WARTMANN, GERD |
分类号 |
G01F23/22;G01F23/28;G01F23/284;G01S7/40;G01S13/02;G01S13/88;(IPC1-7):G01S13/08 |
主分类号 |
G01F23/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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