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. 27, 2019
Filed:
Jun. 25, 2014
Seiko Instruments Inc., Chiba-shi, Chiba, JP;
Yoko Shinohara, Chiba, CN;
Takeshi Uchiyama, Chiba, CN;
Manabu Oumi, Chiba, CN;
Masayuki Suda, Chiba, CN;
SEIKO INSTRUMENTS INC., , JP;
Abstract
An arithmetic processing unit included in a pressure change measuring apparatus includes a differential pressure calculation unit configured to obtain a pressure difference between an inner pressure of a cavity and a pressure to be measured based on an output signal of a differential pressure measuring cantilever. A pressure-to-be-measured calculating unit calculates the pressure to be measured based on a set inner pressure of the cavity and the differential pressure calculated by the differential pressure calculation unit. A flow rate calculating unit calculates a flowing quantity of a pressure transmission medium flowing into and out of the cavity for every unit of a predetermined time period based on the differential pressure calculated by the differential pressure calculation unit. An inner pressure updating unit calculates the inner pressure of the cavity after the predetermined time period based on the flowing quantity calculated by the flow rate calculating unit and a volume of the cavity, and updates, to the calculated inner pressure, a set value of the inner pressure of the cavity to be used by the pressure-to-be-measured calculating unit.