JPS6439535A - Pressure detector - Google Patents

Pressure detector

Info

Publication number
JPS6439535A
JPS6439535A JP19595787A JP19595787A JPS6439535A JP S6439535 A JPS6439535 A JP S6439535A JP 19595787 A JP19595787 A JP 19595787A JP 19595787 A JP19595787 A JP 19595787A JP S6439535 A JPS6439535 A JP S6439535A
Authority
JP
Japan
Prior art keywords
coil
ferrite core
diaphragm
pressure
winding coil
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
JP19595787A
Other languages
Japanese (ja)
Inventor
Mitsusachi Kiuchi
Shoichi Matsui
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP19595787A priority Critical patent/JPS6439535A/en
Publication of JPS6439535A publication Critical patent/JPS6439535A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To increase variation in the inductance of a winding coil due to the displacement of a ferrite core and to enable high-accuracy pressure detection even when pressure is small by installing the ferrite core in the center of the cylinder of the winding coil. CONSTITUTION:A diaphragm 2 is fitted in a case 1 so that it can be displaced upward and downward, and a diaphragm plate 3 to which the ferrite core 4 is fitted is provided on the diaphragm 2 coaxially. Further, the winding coil 5 is fixed in the case 1, a coil spring 6 is provided so as to obtain linear displacement with pressure applied to the diaphragm 2, and the inductance variation of the winding coil 5 is detected. Then, the spring 6, coil 5, and ferrite core 4 are arranged coaxially and the ferrite core 4 moves inside the coil 5 and is arranged so that the end surface of the ferrite core 4 is close to the end surface of the coil 5 when the pressure applied to the diaphragm 2 is zero, so the inductance variation of the coil 5 due to the displacement of the ferrite core 4 is increased effectively when the pressure is low.
JP19595787A 1987-08-05 1987-08-05 Pressure detector Pending JPS6439535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19595787A JPS6439535A (en) 1987-08-05 1987-08-05 Pressure detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19595787A JPS6439535A (en) 1987-08-05 1987-08-05 Pressure detector

Publications (1)

Publication Number Publication Date
JPS6439535A true JPS6439535A (en) 1989-02-09

Family

ID=16349790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19595787A Pending JPS6439535A (en) 1987-08-05 1987-08-05 Pressure detector

Country Status (1)

Country Link
JP (1) JPS6439535A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011033421A (en) * 2009-07-31 2011-02-17 Hitachi Appliances Inc Pressure sensor of pump device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172011A (en) * 1986-01-22 1986-08-02 Hitachi Ltd Displacement detector
JPS6296834A (en) * 1986-01-27 1987-05-06 Hitachi Ltd Pressure detector
JPS6296836A (en) * 1986-01-27 1987-05-06 Hitachi Ltd Pressure detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172011A (en) * 1986-01-22 1986-08-02 Hitachi Ltd Displacement detector
JPS6296834A (en) * 1986-01-27 1987-05-06 Hitachi Ltd Pressure detector
JPS6296836A (en) * 1986-01-27 1987-05-06 Hitachi Ltd Pressure detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011033421A (en) * 2009-07-31 2011-02-17 Hitachi Appliances Inc Pressure sensor of pump device

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