Thermal dispersion probe with microcomputer controller
US6318168A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1999 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Jan 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/699
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Thermal dispersion probes used as flowrate sensors in process control of a medium heated by a heater. The device includes a reference temperature sensor for producing an electrical signal indicative of the temperature of the medium in which it is immersed, and an active temperature sensor for producing an electrical signal indicative of the temperature of the medium adjacent the heater. The temperature difference between the active sensor and the reference sensor is processed in a processor which varies the heater power to maintain the temperature differential between the active sensor and the reference sensor within a predetermined range, whereby the predetermined range provides an optimal sensitivity for the probes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.