发明名称 |
Guided wave radar level transmitter with automatic velocity compensation |
摘要 |
A guided wave radar transmitter comprises a probe defining a transmission line including a relatively low impedance target marker above an expected sensing region of the probe. A pulse circuit is connected to the probe for generating pulses on the transmission line and receiving a reflected signal from the transmission line. The reflected signal selectively includes a target pulse representing the target marker and a level pulse representing material along the length of the probe. A controller is operatively connected to the pulse circuit. The controller normally operates at a relatively low gain to determine a level time to the level pulse to determine material level, and periodically operates at a relatively high gain to determine a target time to the target pulse. The target time is used to compensate the level time for properties of vapor above the material level.
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申请公布号 |
US6867729(B2) |
申请公布日期 |
2005.03.15 |
申请号 |
US20030630564 |
申请日期 |
2003.07.30 |
申请人 |
MAGNETROL INTERNATIONAL |
发明人 |
BERRY JAMES M.;GARD ALAN M. |
分类号 |
G01F23/284;G01S7/34;G01S7/40;G01S13/02;(IPC1-7):G01S13/08;G01S13/00 |
主分类号 |
G01F23/284 |
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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