公开(公告)号：US11802849B2

公开(公告)日：2023-10-31

申请号：US17709567

申请日：2022-03-31

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Dae Sung Lee ,  Kwang Bum Park

IPC: G01N27/66

CPC classification number: G01N27/66

Abstract: Disclosed is a photoionization gas sensor including an ultraviolet generating module having a first substrate, a second substrate, and a third substrate sequentially coupled in a vertical direction, and configured to generate ultraviolet by applying an electric field to a noble gas filling a first cavity, the first cavity formed in a central portion of the second substrate, and a measuring module configured to collect an electrical signal, the electrical signal being generated such that an electric field is applied to a passage, through which gas ionized by ultraviolet passes, so as to allow the ionized gas to come into contact with an electrode, thereby having a small volume and being operated at a low voltage.

公开(公告)号：US10310050B2

公开(公告)日：2019-06-04

申请号：US15702578

申请日：2017-09-12

Applicant: Korea Electronics Technology Institute

Inventor： Won Ki Park ,  Dae Sung Lee

IPC: G01R35/00 ,  G01R17/10 ,  G01R33/07

Abstract: A method and an apparatus for calculating an offset of a Wheatstone bridge type sensor are described. The offset calculation method includes measuring resistances between nodes of a Wheatstone bridge type sensor, calculating an offset of the sensor using the measured resistances and providing information on the calculated offset. Accordingly, the offset of the Wheatstone bridge type sensor can be rapidly and easily calculated independently from the size of a bias current, and ultimately. Furthermore, time required to measure can be reduced and thus a sensor fabrication cost can be reduced, and also, mass production can be enhanced.