Direct-heated gas-flow measuring apparatus
US4627279A · kind A · utility
17Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1985 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | May 2, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6965
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A direct-heated gas-flow measuring apparatus for a passage including a plurality of film resistors, disposed within the passage, for generating heat and measuring the temperature thereof, and a feedback control circuit for controlling the heat generated by the film resistors so that the temperature of each of the film resistors is a predetermined value. The feedback control circuit generates a plurality of output signals corresponding to voltages applied to the film resistors. A mean value for the plurality of output signals is calculated as the amount of gas-flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.