发明名称 |
Magnetic flowmeter with empty tube detection |
摘要 |
A magnetic flowmeter has a tube for supporting fluid flow and a circuit for indicating when the tube is empty. The circuit includes an amplifier connected to two electrodes in the tube and a variable resistor. The amplifier produces an oscillating signal when the tube is empty. The circuit is calibrated for a particular fluid by finding a range of resistances for the variable resistor at which the circuit provides an accurate indication that the tube is empty, and storing information in the processor indicating a resistance in the range for the fluid.
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申请公布号 |
US5895864(A) |
申请公布日期 |
1999.04.20 |
申请号 |
US19950580509 |
申请日期 |
1995.12.28 |
申请人 |
THE FOXBORO COMPANY |
发明人 |
WANG, SHIQUAN;LEWIS, PETER B.;FONTENEAU, NORMAN O.;DEVORE, VINCENT W. |
分类号 |
G01F1/00;G01F1/60;G01F25/00;(IPC1-7):G01F1/58 |
主分类号 |
G01F1/00 |
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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