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. 26, 2022
Filed:
Jan. 30, 2019
Ball Wave Inc., Sendai, JP;
Kazushi Yamanaka, Sendai, JP;
Nobuo Takeda, Sendai, JP;
Shingo Akao, Sendai, JP;
Toshihiro Tsuji, Sendai, JP;
Toru Oizumi, Sendai, JP;
Hideyuki Fukushi, Sendai, JP;
Tatsuhiro Okano, Sendai, JP;
Nagisa Sato, Sendai, JP;
Yusuke Tsukahara, Sendai, JP;
BALL WAVE INC, Sendai, JP;
Abstract
A collimated beam () of a surface acoustic wave propagates on a piezoelectric substrate () while passing through sensitive film () to adsorb a sensing gas. Signal processing unit () transmits an exciting burst signal to sensor electrode () to excite the collimated beam (), receives first and second returned burst signals after the collimated beam () has propagated, and calculates a target gas parameter by a target leakage factor of the background gas and a relation between reference gas parameters and reference leakage factors of reference gases, the leakage factor is provided by first and second attenuations of the first and second returned burst signals, respectively, using waveform data of the first and second returned burst signals.