Method of processing a signal from a thermal type flow sensor
US5301126A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1992 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Mar 11, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6965
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of processing signal for a thermal type flow sensor having a temperature dependence resistance employing platinum and the like and a holding member made of alumina for holding it so as to compensate for response delay when fluid flow is changed, in which, when the fluid flow is maintained in a stationary state, the so-called equilibrium state, by steps of setting in advance the relation between a flow related value which changes according to flow change and a first operational value showing the temperature characteristic of the holding member which changes according to flow so as to make the flow related value as a parameter, calculating the first operational value from the flow related value when flow is detected in accordance with the predetermined relation, comparing the calculated first operational value with the second operational value which is set in relation with the first operational value, correcting the second operational value so that it approximates the first operational value according to the compared result, calculating a compensating factor by a predetermined operational formula with the calculated first operational value and the corrected second operationa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.