Detecting apparatus using a digital computer
US4479190A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1981 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Dec 10, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B15/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A detecting apparatus for compensating for changes in supply voltage to a physical parameter sensor. The apparatus includes an input element, such as a heatsensitive resistor connected to a voltage source to produce a voltage signal (C.sub.S) corresponding to a physical factor, e.g., a temperature. A constant voltage circuit or a voltage divider connected to the same voltage source as the input element produces a reference voltage signal (C.sub.R) corresponding to a predetermined reference value of the input element. Both voltage signals (C.sub.S, C.sub.R) are applied to a microcomputer in which a correction value (C.sub.C) is calculated on the basis of the both voltage signals (C.sub.S, C.sub.R) and a theoretical set value (C.sub.O) of the reference voltage signal (C.sub.R). The detected physical factor by the input element is corrected by the correction value (C.sub.C).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.