Method of measuring and controlling ozone concentration
US4983526A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 24, 1989 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Feb 24, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/25125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring or controlling ozone concentration by ultraviolet ray absorptiometry, includes charging air into a testing tank with its temperature controlled, measuring the disturbing gases generated from testpieces such as rubber samples inside the testing tank by regarding them as ozone, subtracting a value representative of the disturbing gases with a calculation circuit from a value indicative of the preexisting state in the tank to set the ozone concentration at zero, generating a necessary quantity of ozone with an ozonizer by using the zero ozone concentration as a reference point, suspending the generation of ozone after the passage of a predetermined time, measuring once again to obtain a new ozone concentration zero value, adjusting the ozone concentration zero value to the new value if there has been a change in the amount of disturbing gases generated, and repeating at least once the operation described above to regulate the ozone concentration to a desired ozone concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.