Apparatus for measuring radon and thoron by using ionization chamber
US12013500B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2019 |
| Grant date | Jun 18, 2024 |
| Priority date | — |
| Expiry date | Aug 12, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J47/026
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An apparatus for measuring radon and thoron using an ionization chamber is proposed. The apparatus includes: a pump for air inflow suctioning and sending external air to at least one channel; a first sensor module outputting an alpha particle detection signal of an electrical signal by detecting alpha (α) particles discharged from radon and thoron; an air inflow delay module delaying air for a predetermined delay time and then outputting the air; a second sensor module outputting an alpha particle detection signal of an electrical signal by detecting alpha (α) particles discharged from radon and thoron; and a control module discriminating normal or abnormal alpha particle detection signals, counting the normal alpha particle detection signals discriminated for a predetermined measurement time, and calculating radioactive ray concentration values on the basis of the counted number of times of the normal alpha particle detection signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.