JPS5735743A - Measuring device for variation of very small atmospheric pressure - Google Patents

Measuring device for variation of very small atmospheric pressure

Info

Publication number
JPS5735743A
JPS5735743A JP11211080A JP11211080A JPS5735743A JP S5735743 A JPS5735743 A JP S5735743A JP 11211080 A JP11211080 A JP 11211080A JP 11211080 A JP11211080 A JP 11211080A JP S5735743 A JPS5735743 A JP S5735743A
Authority
JP
Japan
Prior art keywords
vessel
pressure
chamber
flexible film
film body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11211080A
Other languages
Japanese (ja)
Inventor
Chikayoshi Kurashige
Kaoru Furusawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meisei Electric Co Ltd
Original Assignee
Meisei Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meisei Electric Co Ltd filed Critical Meisei Electric Co Ltd
Priority to JP11211080A priority Critical patent/JPS5735743A/en
Publication of JPS5735743A publication Critical patent/JPS5735743A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/008—Transmitting or indicating the displacement of flexible diaphragms using piezoelectric devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

PURPOSE:To measure a sudden change of atmospheric pressure, with high accuracy, by measuring only when a change of atmospheric pressure has attained to a set value. CONSTITUTION:A space which has been surrounded by the first vessel 8 and the second vessel 9 is divided into two parts by a flexible film body 10, and the first chamber 8A and the second chamber 9A are formed by the flexible film body 10 and the vessel 8, and the flexible film body 10 and the vessel 9, respectively. On the vessel 8 and the vessel 9 are provided communicating holes 8B, 9B by which the respective chambers 8A, 9A communicate to the open air, and on the communicating hole 9B is provided an electromagnetic valve 12 for opening and closing between the chamber 9A and the open air. A pressure sensor 11 detects and measures pressure of a difference between the chamber 8A and 9A through the flexible film body 10. A measurig signal processing part 13 receives a signal which has been sent from the pressure sensor 11, converts it to a variaton of pressure by means of signal processing, sends it out to a display recording part 15, also sends out an opening and closing indication signal to an opening and closing means driving part 14 whenever a variation of pressure attains to a set value, and instantaneously opens the electromagnetic valve 12.
JP11211080A 1980-08-14 1980-08-14 Measuring device for variation of very small atmospheric pressure Pending JPS5735743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11211080A JPS5735743A (en) 1980-08-14 1980-08-14 Measuring device for variation of very small atmospheric pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11211080A JPS5735743A (en) 1980-08-14 1980-08-14 Measuring device for variation of very small atmospheric pressure

Publications (1)

Publication Number Publication Date
JPS5735743A true JPS5735743A (en) 1982-02-26

Family

ID=14578399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11211080A Pending JPS5735743A (en) 1980-08-14 1980-08-14 Measuring device for variation of very small atmospheric pressure

Country Status (1)

Country Link
JP (1) JPS5735743A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016892C2 (en) * 2000-12-15 2002-06-19 Mega Tech Holding Bv Composition intended as an additive for cement.
WO2004074802A1 (en) * 2003-02-20 2004-09-02 Fujikin Incorporated Super-precise micro-differential pressure measuring device and super-precise differential pressure measuring device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016892C2 (en) * 2000-12-15 2002-06-19 Mega Tech Holding Bv Composition intended as an additive for cement.
WO2002048067A1 (en) * 2000-12-15 2002-06-20 Mega-Tech Holding B.V. Composition which is intended for use as an additive for cement
WO2004074802A1 (en) * 2003-02-20 2004-09-02 Fujikin Incorporated Super-precise micro-differential pressure measuring device and super-precise differential pressure measuring device
US7185543B2 (en) 2003-02-20 2007-03-06 Fujikin Incorporated Ultra-precision micro-differential pressure measuring device and ultra-precision differential pressure measuring device

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