Invention Grant
US07669455B2 Automatic zero point correction device for a pressure sensor, a pressure control device and a pressure type flow rate control device
有权
用于压力传感器，压力控制装置和压力式流量控制装置的自动零点校正装置
- Patent Title: Automatic zero point correction device for a pressure sensor, a pressure control device and a pressure type flow rate control device
- Patent Title (中): 用于压力传感器，压力控制装置和压力式流量控制装置的自动零点校正装置
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Application No.: US10561602Application Date: 2004-06-10
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Publication No.: US07669455B2Publication Date: 2010-03-02
- Inventor: Tadahiro Ohmi , Kazuhiko Sugiyama , Shoichi Hino , Eiji Takahashi , Makoto Saegusa , Nobukazu Ikeda , Kouji Nishino , Ryousuke Dohi , Toyomi Uenoyama , Katsuyuki Sugita
- Applicant: Tadahiro Ohmi , Kazuhiko Sugiyama , Shoichi Hino , Eiji Takahashi , Makoto Saegusa , Nobukazu Ikeda , Kouji Nishino , Ryousuke Dohi , Toyomi Uenoyama , Katsuyuki Sugita
- Applicant Address: JP Osaka JP Osaka
- Assignee: Fujikin Incorporated,Tadahiro Ohmi
- Current Assignee: Fujikin Incorporated,Tadahiro Ohmi
- Current Assignee Address: JP Osaka JP Osaka
- Agency: Griffin & Szipl, P.C.
- Priority: JP2003-177135 20030620
- International Application: PCT/JP2004/008118 WO 20040610
- International Announcement: WO2004/113860 WO 20041229
- Main IPC: G01F19/00
- IPC: G01F19/00
Abstract:
The invention provides an automatic zero point correction device that includes a pressure sensor, wherein output from the sensor is outputted and the sensor output is inputted to a time-varying zero point drift correction means of the sensor; a sensor output judgement means of the time-varying zero point drift correction means, wherein the sensor output judgement means operates to make a judgement determining whether the sensor output is larger than a set value; and operating condition judgement means of the time-varying zero point drift correction means, wherein the operating condition judgement means judges operating conditions of the sensor, wherein the time-varying zero point drift correction means operates to cancel time-varying zero point drift of the sensor when the sensor output judgement means determines sensor output is larger than the set value and the operating condition judgement means determines operating conditions of the sensor are within previously set operating conditions.
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