JPS646763A - Rotational speed detector - Google Patents
Rotational speed detectorInfo
- Publication number
- JPS646763A JPS646763A JP16070487A JP16070487A JPS646763A JP S646763 A JPS646763 A JP S646763A JP 16070487 A JP16070487 A JP 16070487A JP 16070487 A JP16070487 A JP 16070487A JP S646763 A JPS646763 A JP S646763A
- Authority
- JP
- Japan
- Prior art keywords
- protruding
- magnetic flux
- pole
- members
- magnetic
- 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.)
- Granted
Links
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
PURPOSE:To obtain a highly sensitive detector, by providing magnetic field generating members, wherein a pair of magnetic poles face two desired members of a plurality of rotational speed detecting members, which are provided in rotary members, through specified gaps, and providing magnetism sensors in a magnetic circuits, which are formed with the magnetic field generating members. CONSTITUTION:When a recess part between protruding pieces 11 and recess part between protruding piece 12 face protruding parts 23 and 24, magnetic flux flows from the surface of the N pole of the protruding part 23 as shown by arrows 51a and 51b. The most part of the magnetic flux penetrates through a magnetism sensor 30 as shown by the arrow 51a and enters into the surface of the S pole of the protruding part 24. Therefore, a voltage is applied in the direction so as to offset the increasing magnetic flux by the magnetim sensor 30. The voltage is outputted. Meanwhile, when the protruding pieces 11 and 12 face the protruding parts 23 and 24, the magnetic flux flows from the surface of the N pole of the protruding part 23 as shown by the arrows 51a and 51b. The most part of the magnetic flux passes through the inside of the protruding pieces 11 and 12 as shown by the arrow 51b and enters into the surface of the S pole of the protruding part 24. Therefore, the most part of the magnetic flux does not passes through the magnetism sensor 30. Therefore, the magnetism sensor outputs a negative voltage, which is reverse to the above described voltage. The rotational speed of a rotary member 16 can be accurately detected based on the interval between pulses.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62160704A JPH0820457B2 (en) | 1987-06-26 | 1987-06-26 | Rotation speed detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62160704A JPH0820457B2 (en) | 1987-06-26 | 1987-06-26 | Rotation speed detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS646763A true JPS646763A (en) | 1989-01-11 |
JPH0820457B2 JPH0820457B2 (en) | 1996-03-04 |
Family
ID=15720664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62160704A Expired - Fee Related JPH0820457B2 (en) | 1987-06-26 | 1987-06-26 | Rotation speed detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0820457B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0348717U (en) * | 1989-09-21 | 1991-05-10 | ||
JP2006220506A (en) * | 2005-02-09 | 2006-08-24 | Denso Corp | Device for detecting angle of rotation |
WO2014054507A1 (en) * | 2012-10-01 | 2014-04-10 | 日立オートモティブシステムズ株式会社 | Rotation angle measurement device and rotation machine employing same |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5842916A (en) * | 1981-09-08 | 1983-03-12 | Fuji Heavy Ind Ltd | Crank angle detecting mechanism |
-
1987
- 1987-06-26 JP JP62160704A patent/JPH0820457B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5842916A (en) * | 1981-09-08 | 1983-03-12 | Fuji Heavy Ind Ltd | Crank angle detecting mechanism |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0348717U (en) * | 1989-09-21 | 1991-05-10 | ||
JP2006220506A (en) * | 2005-02-09 | 2006-08-24 | Denso Corp | Device for detecting angle of rotation |
WO2014054507A1 (en) * | 2012-10-01 | 2014-04-10 | 日立オートモティブシステムズ株式会社 | Rotation angle measurement device and rotation machine employing same |
JP5936701B2 (en) * | 2012-10-01 | 2016-06-22 | 日立オートモティブシステムズ株式会社 | Rotation angle measuring device and rotating machine using the same |
Also Published As
Publication number | Publication date |
---|---|
JPH0820457B2 (en) | 1996-03-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
LAPS | Cancellation because of no payment of annual fees |