Thermal type flow measuring instrument and temperature-error correcting apparatus thereof
US6230559A · kind A · utility
5Cited by
2References
7Claims
0Family size
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Inventors
Key dates
| Filing date | Jul 8, 1998 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Jul 8, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0414
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In flow detection by a thermal-type flow measuring instrument, a flow rate valve with reduced measurement error due to temperature variation can be obtained even under environment where a fluid temperature and a circuit temperature are different. A measurement error due to temperature variation of the fluid of the thermal-type flow measuring instrument can be corrected on the basis of a temperature of the fluid by adjusting the measurement error to be constant ratio irrespective of the flow rate. On the other hand, a temperature characteristic of the circuit is adjusted to be substantially zero %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.