A/D conversion processing apparatus providing improved elimination of effects of noise through digital processing, method of utilizing the A/D conversion processing apparatus, and electronic control apparatus incorporating the A/D conversion processing apparatus
US6933867B2 · kind B2 · utility
11Cited by
8References
38Claims
0Family size
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Key dates
| Filing date | Nov 12, 2004 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Nov 12, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/28
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an A/D conversion control apparatus for use in an electronic controller such as an engine ECU of a vehicle, each of successive sets of A/D converted values of an analog signal (each set comprising 3 or more values) is processed to obtain a median value of the set, and the median values are subjected to digital smoothing processing to obtain successive final result values, with effects of noise contained in the analog signal being effectively excluded. The final result values are suitable as control data, supplied to a control device such as a microcomputer of an ECU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.