JPS57211505A - Position detector - Google Patents
Position detectorInfo
- Publication number
- JPS57211505A JPS57211505A JP9664981A JP9664981A JPS57211505A JP S57211505 A JPS57211505 A JP S57211505A JP 9664981 A JP9664981 A JP 9664981A JP 9664981 A JP9664981 A JP 9664981A JP S57211505 A JPS57211505 A JP S57211505A
- Authority
- JP
- Japan
- Prior art keywords
- fixed
- movable member
- lamps
- photosensors
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
PURPOSE:To detect the position of the origin with ease and high sensitivity by a constitution wherein a pair of lamps and photosensors arranged oppositely on optical axes are provided at a fixed or movable member and an index for intercepting a light is provided between the lamps and photosensors. CONSTITUTION:A pair of lamps 13 and 14 are fixed to a fixed member 11 at an interval in the direction (shown by an arrow) of the movement of a movable member 12, while a pair of photosensors 15 and 16 are fixed oppositely on optical axes respectively. A scale 17 is fixed at a right angle to optical paths. On the othr hand, an index 18 is fixed to the movable member 12, and when the movable member 12 is moved to and positioned at the position of the origin, the lights of the lamps 13 and 14 pass through light-transmitting windows 19 and 20 and reach the photosensors 15 and 16. The light-transmitting windows 19 and 20 are formed in such a manner that they are deviated somewhat outward from the optical axes, and when the movable member 12 is moved upward, an incident light in the photosensor 15 is intercepted and an output of the sensor 15 decreases. When the member 12 is moved downward, the output of the photosensor 16 decreases. Accordingly, the position of the origin is detected with ease and high sensitivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9664981A JPS57211505A (en) | 1981-06-24 | 1981-06-24 | Position detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9664981A JPS57211505A (en) | 1981-06-24 | 1981-06-24 | Position detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57211505A true JPS57211505A (en) | 1982-12-25 |
Family
ID=14170669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9664981A Pending JPS57211505A (en) | 1981-06-24 | 1981-06-24 | Position detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57211505A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4612871A (en) * | 1985-01-02 | 1986-09-23 | Tachikawa Spring Co., Ltd. | Device for visually setting the spring force of a seat suspension for a vehicle |
| CN105698333A (en) * | 2014-11-24 | 2016-06-22 | 夏普株式会社 | Infrared radiation source position sensing device, fan blade control device, and temperature adjusting device |
-
1981
- 1981-06-24 JP JP9664981A patent/JPS57211505A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4612871A (en) * | 1985-01-02 | 1986-09-23 | Tachikawa Spring Co., Ltd. | Device for visually setting the spring force of a seat suspension for a vehicle |
| CN105698333A (en) * | 2014-11-24 | 2016-06-22 | 夏普株式会社 | Infrared radiation source position sensing device, fan blade control device, and temperature adjusting device |
| CN105698333B (en) * | 2014-11-24 | 2019-12-17 | 夏普株式会社 | position sensing device of infrared source, control device of fan blade and temperature adjusting equipment |
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