Gas detector and program
US9606075B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2015 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Aug 6, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A first bridge fixed resistor (211) of a combustible gas detection apparatus (1) is composed of a resistor element which is less likely to deteriorate as compared with a second bridge fixed resistor (212) and a variable resistor section (213). The combustible gas detection apparatus (1) can judge a deteriorated state of at least one of the second bridge fixed resistor (212) and the variable resistor section (213) on the basis of the absolute value of a difference temperature ΔT which is the difference between a detection-time judgment temperature T1 and a reference judgment temperature T0. The combustible gas detection apparatus (1) obtains a corrected high-temperature-time voltage VH′ and a corrected low-temperature-time voltage VL′ through use of a voltage error ΔV1. Thus, a decrease in the accuracy in detecting the hydrogen concentration can be suppressed even when the resistance of the resistor section changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.