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1. 发明专利

JPH06288801A METHOD AND EQUIPMENT FOR DETERMINING GAS FLOW RATE USING BOYLE'S LAW 失效
公开(公告)号：JPH06288801A
公开(公告)日：1994-10-18
申请号：JP7747193
申请日：1993-03-12
申请人： CURTIN MATHESON SCIENT INC
发明人： DABURIYU SUTEIIBUN UTSUDOWAADO
IPC分类号： G01F1/34 , G01F3/36 , G01F3/38
摘要： PURPOSE: To reduce a back pressure generated at a gas flow path and automate operation by providing a sensor for sensing the gas pressure is a sealed volume portion provided with a gas flow inlet. CONSTITUTION: When a valve 15 is at an actuation position by means of a control signal, a tank 20 (sealed volume portion) communicates with a flow outlet via a center port 17, a movable valve member 19, and an outlet port 18. At an inactive position, an inlet port 14 and a tank 20 are communicated with each other via the member 19 and the center port 17, and gas flows from an inlet 11 and the tank 20. A pressure sensor 25 is arranged so as to sense the pressure in the tank 20. This device is based on the principle of Boyle's law in which the multiple of the pressure and volume of gas are constant at a constant temperature. Therefore, when gas flow is pressure-stored in a constant capacity, the pressure raises in proportional to the flow rate. That is, the flow to be measured is pressure-stored over the known time length in the tank 20 of the known capacity. That pressure rise is measured by means of the pressure sensor 25 and is converted to the flow rate value.

2. 实用新型

JPH0612495Y2 失效
公开(公告)号：JPH0612495Y2
公开(公告)日：1994-03-30
申请号：JP1283788
申请日：1988-02-02
IPC分类号： G01F3/36 , G01F3/38

3. 发明专利

JPH0361132B2 失效
公开(公告)号：JPH0361132B2
公开(公告)日：1991-09-18
申请号：JP4001883
申请日：1983-03-12
申请人： SATAKE ENG CO LTD
发明人： MITSUKAWA YOSHIMICHI
IPC分类号： G01F3/38 , G01F11/24 , G01G11/00

4. 实用新型

JPH0316027Y2 失效
公开(公告)号：JPH0316027Y2
公开(公告)日：1991-04-08
申请号：JP13099984
申请日：1984-08-28
IPC分类号： G01F23/62 , G01F1/52 , G01F3/38

5. 发明专利

JPH0231408B2 失效
公开(公告)号：JPH0231408B2
公开(公告)日：1990-07-13
申请号：JP47282
申请日：1982-01-06
申请人： PERKIN ELMER CORP
发明人： RICHAADO ERU BAASHIN , UIRIAMU EICHI KURAUZAA
IPC分类号： G01F1/34 , G01F3/38 , G05D7/06

6. 实用新型

JPS63161326U 失效
公开(公告)号：JPS63161326U
公开(公告)日：1988-10-21
申请号：JP5577487
申请日：1987-04-13
IPC分类号： G01F23/26 , F04B51/00 , G01F1/00 , G01F3/38 , G01F25/00

7. 发明专利

JPS636809B2 失效
公开(公告)号：JPS636809B2
公开(公告)日：1988-02-12
申请号：JP10027382
申请日：1982-06-11
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KOMURA YUKIO , MASUDA KAZUHIKO , MYAMOTO TOMOYUKI
IPC分类号： G01F3/00 , G01F3/36 , G01F3/38 , G01F5/00

8. 实用新型

JPS62126727U 失效
公开(公告)号：JPS62126727U
公开(公告)日：1987-08-11
申请号：JP19267586
申请日：1986-12-15
IPC分类号： G01F3/38

9. 发明专利

JPS61172018A VOLUME FLOW METER 失效
公开(公告)号：JPS61172018A
公开(公告)日：1986-08-02
申请号：JP1245985
申请日：1985-01-28
申请人： YAMATAKE HONEYWELL CO LTD
发明人： MATSUOKA TAKESHI , YAMAZAKI HIROSHI
IPC分类号： G01F3/00 , G01F3/38
摘要： PURPOSE:To enable automatic and repeated measurements of volumes regardless of flowing gas viscosity and density, by constructing a volume flow meter with inlet and outlet pipes of the specimens gas. liquid level gauge for changed of liquid level and controlling circuit of electromagnetic valve, etc. CONSTITUTION:When at the very beginning, an electromagnetic valve 10 installed in a gas discharging side pipe 7 is opened to release pressure inside a gas inlet chamber 3, the top surfaces of the liquid 5 emerged into the inside of the chamber 3 and an annular chamber formed on the outside of the glass tube 4 are held in the approximately the same condition. Next, when the valve 10 is closed, the specimen gas flowing from the supply side pipe path 6 is acccumulated in the chamber 3 and at the same time, the liquid level drops down. And by measuring time required by the liquid level from its time of arrival at an optical liquid level gauge 8 and then down to the gauge 9 by detectors 8, 9 and controlling circuit 11, a gas volume flow rate per unit time can be detected. Further, when the valve 10 is closed alter the passage of the liquid level through the gauge 9, gas accumulated in the chamber 3 is discharged from the pipe path 7 and the liquid level goes up to the original position. Measurements are continued in the same way.

10. 实用新型

JPS6039780Y2 失效
公开(公告)号：JPS6039780Y2
公开(公告)日：1985-11-29
申请号：JP211579
申请日：1979-01-16
IPC分类号： G01F3/00 , G01F3/38 , G01F13/00 , G01N1/00 , G01N35/00 , G01N35/10

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