The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Jul. 12, 2023
University of South China, Hengyang, CN;
University of South China, Hengyang, CN;
Abstract
A calibration device for a radon exhalation rate measuring instrument and radon exhalation rate control method thereof is provided, and relates to the field of radon exhalation rate measurement. The device includes a diffusive solid radon source, a solid radon source containing chamber, a radon accumulation chamber, a diffusion medium, an air pressure balancing device, a support frame and a fixture; a circular cone opening at a bottom of the radon accumulation chamber is connected with the solid radon source containing chamber, a top of the radon accumulation chamber is sealed by the diffusion medium, the diffusion medium includes a plasterboard and a high-density wood board, the high-density wood board is on the plasterboard, the air pressure balancing device is connected with the radon accumulation chamber, and configured to maintain dynamic balance between the radon accumulation chamber and ambient atmospheric pressure.