Device and method for digitally measuring a voltage varying within a given range, and uses thereof
US5611624A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/2048
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method wherein (a) a voltage to be measured (U.sub.e) is amplified with a gain proportional to the ratio between the reference voltage (V.sub.ref) of an analogue-to-digital converter (3) and the extent of the voltage range; (b) the reference voltage (V.sub.ref) is amplified with a gain proportional to the ratio between the lower terminal (U.sub.1) of the voltage range and the extent of the voltage range; and (c) the analogue input of the converter (3) is supplied with the resulting amplified voltage difference. The method is useful for measuring a temperature by means of a thermocouple and measuring the temperature of an oxygen sensor in a motor vehicle exhaust line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.