JPS6439535A - Pressure detector - Google Patents
Pressure detectorInfo
- 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
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.
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)
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)
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 |
-
1987
- 1987-08-05 JP JP19595787A patent/JPS6439535A/en active Pending
Patent Citations (3)
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)
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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