JPS5565112A - Position detector - Google Patents
Position detectorInfo
- Publication number
- JPS5565112A JPS5565112A JP13925078A JP13925078A JPS5565112A JP S5565112 A JPS5565112 A JP S5565112A JP 13925078 A JP13925078 A JP 13925078A JP 13925078 A JP13925078 A JP 13925078A JP S5565112 A JPS5565112 A JP S5565112A
- Authority
- JP
- Japan
- Prior art keywords
- detectors
- pulse
- duty
- phase difference
- photo
- 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
- Optical Transform (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
PURPOSE: To enable the detection not subjected to temperature and voltage variation, by shifting the first and second index group for detected member and obtaining the pulse output of duty 1/2 so that the phase difference between the output signals of first and second detectors can be avoided to be 2nπ.
CONSTITUTION: The detected plate 5 fixed on the base has the index groups 7 and 8 consisting of a number of slits 6 up and down in the state that they are shifted each other. The light emitting element 9 and the photo detectors 10 and 11 as the first and second detectors are located up and down opposingly in front and at the back of the slit 6 group of the indices 7, 8 and fixed to the mobile body. The photo detectors 10, 11 consist of the photo transistors (PT) 10a and 11a and have the same characteristics and the common emitter is taken. Accompanied with the shift of mobile body, sinusoidal waves having the phase difference not being 2nπ (n= 0, ±1, ±2...) are outputted with the position shift of the index groups 7, 8 from PT10a, 11a, and the outputs are compared at the differential amplifier 14 to obtain the pulse outout of duty 1/2 and the position detection pulse is obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13925078A JPS5565112A (en) | 1978-11-10 | 1978-11-10 | Position detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13925078A JPS5565112A (en) | 1978-11-10 | 1978-11-10 | Position detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5565112A true JPS5565112A (en) | 1980-05-16 |
Family
ID=15240933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13925078A Pending JPS5565112A (en) | 1978-11-10 | 1978-11-10 | Position detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5565112A (en) |
-
1978
- 1978-11-10 JP JP13925078A patent/JPS5565112A/en active Pending
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