JPS5565108A - Position detector - Google Patents

Position detector

Info

Publication number
JPS5565108A
JPS5565108A JP13924978A JP13924978A JPS5565108A JP S5565108 A JPS5565108 A JP S5565108A JP 13924978 A JP13924978 A JP 13924978A JP 13924978 A JP13924978 A JP 13924978A JP S5565108 A JPS5565108 A JP S5565108A
Authority
JP
Japan
Prior art keywords
photo
shift
detector
duty
slit
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
Application number
JP13924978A
Other languages
Japanese (ja)
Inventor
Takemi Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP13924978A priority Critical patent/JPS5565108A/en
Publication of JPS5565108A publication Critical patent/JPS5565108A/en
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE: To ensure the detection not subjected to temperature and voltage variation, by obtaining the pulse output in duty 1/2, through the first and second detector so that the phase difference between the output signals cannot be 2nπ to the index of detected member.
CONSTITUTION: The slit 6 is regularly formed on the detected plate 5 fixed on the base stand and the light emitting elements 7, 8 and photo detectors 9, 10 are provided in shifted their positions by clipping the slits 6, to constitute the first and second detectors with the elemetns 7, 8, 9, 10. The photo transistors 9a and 10a at the photo detection section have the same characteristics and, via the identical resistors 11, 12, the emitter is grounded respectively, and sinusoidal wave signal is outputted with the shift of mobile body, but alignment is made with the second detector by its position shift so that the phase difference can be caused not at 2nπ (where; n=0, ±1, ±2...). The both signals are inputted to the differential amplifier 13 for comparison to obtain the pulse in duty 1/2 resulting in obtaining the shift detection signal for the slit 6.
COPYRIGHT: (C)1980,JPO&Japio
JP13924978A 1978-11-10 1978-11-10 Position detector Pending JPS5565108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13924978A JPS5565108A (en) 1978-11-10 1978-11-10 Position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13924978A JPS5565108A (en) 1978-11-10 1978-11-10 Position detector

Publications (1)

Publication Number Publication Date
JPS5565108A true JPS5565108A (en) 1980-05-16

Family

ID=15240911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13924978A Pending JPS5565108A (en) 1978-11-10 1978-11-10 Position detector

Country Status (1)

Country Link
JP (1) JPS5565108A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124872A (en) * 1982-12-31 1984-07-19 Fujitsu Ltd Wire dot printer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124872A (en) * 1982-12-31 1984-07-19 Fujitsu Ltd Wire dot printer
JPH0424235B2 (en) * 1982-12-31 1992-04-24 Fujitsu Ltd

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