JPS56141562A - Detection for uneven rotation of rotatable body - Google Patents
Detection for uneven rotation of rotatable bodyInfo
- Publication number
- JPS56141562A JPS56141562A JP4413580A JP4413580A JPS56141562A JP S56141562 A JPS56141562 A JP S56141562A JP 4413580 A JP4413580 A JP 4413580A JP 4413580 A JP4413580 A JP 4413580A JP S56141562 A JPS56141562 A JP S56141562A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- rotatable body
- uneven rotation
- photodetector
- light
- 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
- 238000001514 detection method Methods 0.000 title 1
- 230000003287 optical effect Effects 0.000 abstract 4
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
Abstract
PURPOSE:To detect uneven rotation highly accurately by reflecting the light entering a plane mirror fitted to the rotating shaft of a rotatable body in the direction assuming a small angle to the incident light thence fetching the signal for time change of the quantity of light through a transmission type optical wedge. CONSTITUTION:The laser beam 2 emitted from a laser light source 1 enters a plane mirror 4 fitted to the end face of the rotating shaft 55 of a rotatable body 5. When the rotatable body 5 rotates, the reflected beam 2' draws the circle 66 of a radius (l).theta according to the angle theta of deviation from an optical axis 22, and the distance (l) from the plane mirror 4 up to a cylindrical lens 6, and this is converted to a line 9 of light making reciprocative linear motion on a photodetector 8 by the lens 6. An optical wedge 10 is disposed just before the photodetector 8, and the output signal of the photodetector 8 is the signal corresponding to the density gradation of the optical wedge 10. If this signal is fetched out by providing a logarithmic conversion amplifier, the signal of the case when there is uneven rotation is the one produced with distortions in the triangular waveform. With such constitution, the uneven rotation is detected extremely highly and accurately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4413580A JPS56141562A (en) | 1980-04-04 | 1980-04-04 | Detection for uneven rotation of rotatable body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4413580A JPS56141562A (en) | 1980-04-04 | 1980-04-04 | Detection for uneven rotation of rotatable body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56141562A true JPS56141562A (en) | 1981-11-05 |
Family
ID=12683176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4413580A Pending JPS56141562A (en) | 1980-04-04 | 1980-04-04 | Detection for uneven rotation of rotatable body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56141562A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS595961A (en) * | 1982-07-02 | 1984-01-12 | Copal Erekutora:Kk | Apparatus and method for measuring speed variation of rotor |
| KR100829158B1 (en) | 2006-10-02 | 2008-05-14 | 이제선 | sensing system for object |
-
1980
- 1980-04-04 JP JP4413580A patent/JPS56141562A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS595961A (en) * | 1982-07-02 | 1984-01-12 | Copal Erekutora:Kk | Apparatus and method for measuring speed variation of rotor |
| KR100829158B1 (en) | 2006-10-02 | 2008-05-14 | 이제선 | sensing system for object |
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