Patent EP0113845A1 successfully refreshed from Google Patents.
US5086745A
Expired / Lapsed
US
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Method and apparatus for processing a thermal flowrate sensor signal
Assignee: Mitsubishi Electric Corp
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Filing: 1990-07-10
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Granted: 1992-02-11
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Expires: 2010-07-10
Abstract
Abstract A method of processing a signal of a thermal flow-rate sensor, provides a temperature monitor for monitoring a temperature at a representative point on a substrate support member; obtains the temperature at the representative point corresponding to the flow rate by use of the temperature monitor; and corrects an output of the sensor in accordance with a value corresponding to the temperature as well as a value corresponding to the temperature at the representative point when the flow rate is in a steady state.
Inventors
- 👤 Yukinobu Nishimura
- 👤 Setsuhiro Shimomura
- 👤 Nobutake Taniguchi
- 👤 Kouji Tanimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:38
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; G01P; G01P5/00; G01P5/10; G01P5/12; F; F02; F02D; F02D41/00; F02D41/02; F02D41/18; F02D41/187; G01F1/684; G01F1/688; G01F1/69; G01F1/692; G01F1/696; G01F1/6965
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
A method of processing a signal of a thermal flow-rate sensor, including a temperature-dependent resistor having a resistance value which fluctuates depending on temperature, and a substrate support member for supporting said temperature-dependent resistor, said thermal flow-rate sensor detecting a flow rate of a fluid on the basis of an output signal formed via said temperature-dependent resistor, comprising the steps of: providing a temperature monitor for monitoring a temperature at a representative point of said support member; obtaining a temperature at the representative point corresponding to the flow rate of said fluid by use of said temperature monitor; and correcting an output of said flow-rate sensor in accordance with a value corresponding to the temperature obtained by use of said temperature monitor and a value corresponding to the temperature at the representative point when the flow rate is in a steady state.
Claim 2
Independent Claim
142 words
A method of processing a signal of a thermal flow-rate sensor, including a temperature-dependent resistor having a resistance value which fluctuates depending on temperature, and a substrate support member for supporting said temperature-dependent resistor, said thermal flow-rate sensor detecting a flow rate of a fluid on the basis of an output signal formed via said temperature-dependent resistor, comprising the steps of: providing a temperature monitor for monitoring a temperature at a representative point of said support member; obtaining a temperature at the representative point corresponding to the flow rate of said fluid by use of said temperature monitor; and correcting an output of said flow-rate sensor in accordance with a value corresponding to the temperature obtained by use of said temperature monitor and a value corresponding to the temperature at the representative point when the flow rate is in a steady state.
Claim 3
Dependent Claim
30 words
A method according to claim 1, further comprising the step of calculating a temperature at the representative point of the support member when the flow-rate is in the steady state.
Claim 4
Dependent Claim
44 words
A method according to claim 1, wherein said thermal flow-rate sensor is used for detecting an air intake flow rate of an internal combustion engine and the output of said flow-rate sensor is corrected in synchronization with the rotation of the internal combustion engine.
Claim 5
Independent Claim
111 words
An apparatus for correcting an output of a thermal flow-rate sensor for detecting a flow rate of a fluid on the basis of an output signal formed via a temperature-dependent resistor, comprising: a substrate support member for supporting said temperature-dependent resistor; a temperature monitor for monitoring a temperature at a representative point of said support member at equal intervals and outputting the temperature; and a correcting means for correcting an output of said flow-rate sensor in accordance with a value corresponding to the temperature obtained by use of said temperature monitor and a value corresponding to the temperature at the representative point when the flow rate is in a steady state.
Claim 6
Independent Claim
111 words
An apparatus for correcting an output of a thermal flow-rate sensor for detecting a flow rate of a fluid on the basis of an output signal formed via a temperature-dependent resistor, comprising: a substrate support member for supporting said temperature-dependent resistor; a temperature monitor for monitoring a temperature at a representative point of said support member at equal intervals and outputting the temperature; and a correcting means for correcting an output of said flow-rate sensor in accordance with a value corresponding to the temperature obtained by use of said temperature monitor and a value corresponding to the temperature at the representative point when the flow rate is in a steady state.
Claim 7
Dependent Claim
29 words
An apparatus according to claim 4, further comprising means for obtaining a temperature at a representative point of the support member when the flow-rate is in a steady state.
Claim 8
Dependent Claim
46 words
An apparatus according to claim 4, wherein said thermal flow-rate sensor is used for detecting an air intake flow rate of an internal combustion engine and said correcting means corrects the output of said flow-rate sensor in synchronization with the rotation of the internal combustion engine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |