Device to measure and/or control flow-through and/or quantity of heat
US5153823A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1990 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Mar 21, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.