Electrical technique for correcting bridge type mass air flow rate sensor errors resulting from ambient temperature variations
US4807151A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1986 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Apr 11, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6965
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mass flow rate sensor for providing an output signal related to mass flow rate past the sensor includes a bridge circuit for generating a first mass flow rate-related signal containing temperature-related errors and mass flow rate-related errors, a resistance for generating a second signal providing temperature error correction, and a resistance for generating a third signal providing mass flow rate error correction. Electrical circuitry operatively couples the bridge circuit and resistances together to provide the output signal. A method for providing an output signal related to mass flow rate includes the steps of generating a first mass flow rate-related signal containing temperature-related errors and mass flow rate-related errors, generating a second signal providing temperature error correction, generating a third signal providing mass flow rate error correction, and combining the first, second and third signals together to provide the output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.