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. 24, 2012
Filed:
Aug. 08, 2007
Won-hyouk Jang, Yongin-si, KR;
Do-young Kim, Yongin-si, KR;
Si-hyun Lee, Yongin-si, KR;
Jung-kurn Park, Yongin-si, KR;
Myeong-ju Ha, Yongin-si, KR;
Sang-min Jeon, Pohang-si, KR;
Won-Hyouk Jang, Yongin-si, KR;
Do-Young Kim, Yongin-si, KR;
Si-Hyun Lee, Yongin-si, KR;
Jung-Kurn Park, Yongin-si, KR;
Myeong-Ju Ha, Yongin-si, KR;
Sang-Min Jeon, Pohang-si, KR;
Samsung SDI Co., Ltd., Gongse-dong, Giheung-gu, Yongin-si, Gyeonggi-do, KR;
Postech Foundation, Hyoja-dong, Nam-gu, Pohang-si, Gyeongsangbuk-do, KR;
Abstract
The disclosed is a density sensing device of a fuel cell system and a fuel cell system having the density sensing device. The density sensing device includes a density sensor that includes a collision sensor and a variable resistor coupled to the collision sensor. The collision sensor is dipped into a fuel solution, and the collisions of molecules of the fuel solution are detected in the collision sensor. The resistance of the variable resistor varies depending on an amount of the collision detected by the collision sensor. The resistance further is converted to a density by the use of a table that includes a relationship between resistance and density. The density sensing device can further include a sensor driver. The sensor driver can be a piezoelectric member that is attached to the collision sensor. The collision sensor vibrates together with the piezoelectric member when a driving signal is applied to the piezoelectric member, which improves the accuracy of the measurement of the density.