JPS57182139A - Self exciting type pressure-frequency converter - Google Patents

Self exciting type pressure-frequency converter

Info

Publication number
JPS57182139A
JPS57182139A JP6672181A JP6672181A JPS57182139A JP S57182139 A JPS57182139 A JP S57182139A JP 6672181 A JP6672181 A JP 6672181A JP 6672181 A JP6672181 A JP 6672181A JP S57182139 A JPS57182139 A JP S57182139A
Authority
JP
Japan
Prior art keywords
diaphragm
light
pattern
vibration
frequency converter
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
JP6672181A
Other languages
Japanese (ja)
Inventor
Nobuyuki Katsuta
Yoshio Shimada
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.)
Shimadzu Corp
Shimazu Seisakusho KK
Original Assignee
Shimadzu Corp
Shimazu Seisakusho KK
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 Shimadzu Corp, Shimazu Seisakusho KK filed Critical Shimadzu Corp
Priority to JP6672181A priority Critical patent/JPS57182139A/en
Publication of JPS57182139A publication Critical patent/JPS57182139A/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
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0008—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations
    • G01L9/0016—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations of a diaphragm
    • G01L9/0017—Optical excitation or measuring

Landscapes

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

Abstract

PURPOSE:To make it unnecessary to compensate for the loss in fiber by using a device that detects the pattern of speckles produced in accordance with the state of surface of a diaphragm. CONSTITUTION:When the pressure in a vessel 1 varies with the natural vibration of a diaphragm 2 given beforehand to itself by means of an exciting coil 3, the vibration of the diaphragm varies. In correspondence to the variation of this diaphragm 2, the light introduced by the light fiber 14 on the side of light projection develops a pattern of speckles on the vibration surface of the diaphragm 2 due to interference. This speckle pattern is detected as light signal and at the same time becomes feedback signal that is introduced into an exciting coil. Because the intrinsic signal is controlled by this feedback signal, the output characteristics can have linearity and stability.
JP6672181A 1981-04-30 1981-04-30 Self exciting type pressure-frequency converter Pending JPS57182139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6672181A JPS57182139A (en) 1981-04-30 1981-04-30 Self exciting type pressure-frequency converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6672181A JPS57182139A (en) 1981-04-30 1981-04-30 Self exciting type pressure-frequency converter

Publications (1)

Publication Number Publication Date
JPS57182139A true JPS57182139A (en) 1982-11-09

Family

ID=13324042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6672181A Pending JPS57182139A (en) 1981-04-30 1981-04-30 Self exciting type pressure-frequency converter

Country Status (1)

Country Link
JP (1) JPS57182139A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539875B2 (en) * 1973-12-12 1978-04-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539875B2 (en) * 1973-12-12 1978-04-08

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