JPS5616875A - Rotation frequency detecting unit - Google Patents
Rotation frequency detecting unitInfo
- Publication number
- JPS5616875A JPS5616875A JP9259379A JP9259379A JPS5616875A JP S5616875 A JPS5616875 A JP S5616875A JP 9259379 A JP9259379 A JP 9259379A JP 9259379 A JP9259379 A JP 9259379A JP S5616875 A JPS5616875 A JP S5616875A
- Authority
- JP
- Japan
- Prior art keywords
- pickups
- rotations
- teeth
- rotation shaft
- rotation
- 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
Landscapes
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
Abstract
PURPOSE: To make it possible to obtain a high-precision output signal proportional to the number of rotations even in the range of a small number of rotations, by fitting plural electromagnetic pickups while shifting the phase for the pitch of teeth of the gear for rotation frequency detection.
CONSTITUTION: For example, three electromagnetic pickups 2 are provided near teeth of gear 1 fitted to the rotation shaft. These pickups 2 are fitted with the phase shifted for the pitch of teeth by Ψ and 2Ψ. Outputs of respective pickups 2 become differentiation signals through a waveform shaping equipment and a differentiating equipment and are led to an adder and are added. As a result, since the pulse signal for every one rotation of the rotation shaft can be increased three times, the number of rotations can be detected accurately even in the range of a low speed of the rotation shaft.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9259379A JPS5616875A (en) | 1979-07-23 | 1979-07-23 | Rotation frequency detecting unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9259379A JPS5616875A (en) | 1979-07-23 | 1979-07-23 | Rotation frequency detecting unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5616875A true JPS5616875A (en) | 1981-02-18 |
Family
ID=14058737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9259379A Pending JPS5616875A (en) | 1979-07-23 | 1979-07-23 | Rotation frequency detecting unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5616875A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5967458A (en) * | 1982-10-12 | 1984-04-17 | Mitsubishi Electric Corp | Digital speed detection system |
JPS59172948A (en) * | 1983-03-22 | 1984-09-29 | Shibaura Eng Works Co Ltd | Composite brushless servo motor |
JPS63148828U (en) * | 1987-03-20 | 1988-09-30 | ||
US8359986B2 (en) | 2007-01-30 | 2013-01-29 | Fujitsu Limited | Apparatus, method and program for protecting accommodated item such as cartridge |
-
1979
- 1979-07-23 JP JP9259379A patent/JPS5616875A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5967458A (en) * | 1982-10-12 | 1984-04-17 | Mitsubishi Electric Corp | Digital speed detection system |
JPH0565827B2 (en) * | 1982-10-12 | 1993-09-20 | Mitsubishi Electric Corp | |
JPS59172948A (en) * | 1983-03-22 | 1984-09-29 | Shibaura Eng Works Co Ltd | Composite brushless servo motor |
JPS63148828U (en) * | 1987-03-20 | 1988-09-30 | ||
US8359986B2 (en) | 2007-01-30 | 2013-01-29 | Fujitsu Limited | Apparatus, method and program for protecting accommodated item such as cartridge |
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