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:
Apr. 20, 2021
Filed:
Dec. 20, 2017
Tsinghua University, Beijing, CN;
Nuctech Company Limited, Beijing, CN;
Zhiqiang Chen, Beijing, CN;
Yuanjing Li, Beijing, CN;
Ziran Zhao, Beijing, CN;
Wanlong Wu, Beijing, CN;
Ming Ruan, Beijing, CN;
Yingkang Jin, Beijing, CN;
Guangwei Ding, Beijing, CN;
Zongjun Shen, Beijing, CN;
Jiajiang Zhao, Beijing, CN;
TSINGHUA UNIVERSITY, Beijing, CN;
NUCTECH COMPANY LIMITED, Beijing, CN;
Abstract
A human body security inspection apparatus, a method of operating the same, and an associated filter device are disclosed. The human body security inspection apparatus includes a radiation beam exit configured for emitting a radiation beam; a beam guiding box configured for guiding the radiation beam; and a filter device configured between the radiation beam exit and the beam guiding box. The filter device includes a housing and a filter cage having a central axis. The filter cage is formed by arranging two or more pairs of filtering sheets, which are made of different materials and/or have different thicknesses, in an encircling way. The filter cage is rotatable about its central axis such that at least one pair of filtering sheets is capable of filtering the radiation beam to adjust an outputted dosage of the radiation beam of the human body security inspection apparatus.