发明名称 |
DEVICE TO MEASURE AND/OR CONTROL FLOW-THROUGH AND/OR QUANTITY OF HEAT |
摘要 |
A device for measuring or controlling a property of a flow medium comprises a conduit which carries a flow medium. A choke element located in the conduit has a first open operating position and a second closed operating position. A driver drives the choke element from one operating position to the other. A pressure sensor measures the difference in pressure before and after the choke element in said conduit. A processor responsive to the pressure difference calculates a flow or thermal property of the flow medium. The processor comprises an input for receiving a continuous control signal which indicates a desired value of a flow or thermal property of the flow medium and a converter for converting the continuous control signal into a pulse-pause signal for controlling the driver.
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申请公布号 |
US5153823(A) |
申请公布日期 |
1992.10.06 |
申请号 |
US19900497089 |
申请日期 |
1990.03.21 |
申请人 |
LANDIS & GYR BETRIEBS AG |
发明人 |
RIES, PETER;NAUER, PAUL;HUBER, WOLFGANG |
分类号 |
G01F1/00;G01F1/42;G01F7/00;G01K17/00;G01K17/12;G01L13/00;G05D23/20 |
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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