JPS57136179A - Photoelectric switch - Google Patents

Photoelectric switch

Info

Publication number
JPS57136179A
JPS57136179A JP56021892A JP2189281A JPS57136179A JP S57136179 A JPS57136179 A JP S57136179A JP 56021892 A JP56021892 A JP 56021892A JP 2189281 A JP2189281 A JP 2189281A JP S57136179 A JPS57136179 A JP S57136179A
Authority
JP
Japan
Prior art keywords
output
noise
circuit
pulse
projecting pulse
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.)
Granted
Application number
JP56021892A
Other languages
Japanese (ja)
Other versions
JPS627733B2 (en
Inventor
Toshibumi Fukuyama
Norio Onchi
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP56021892A priority Critical patent/JPS57136179A/en
Publication of JPS57136179A publication Critical patent/JPS57136179A/en
Publication of JPS627733B2 publication Critical patent/JPS627733B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Electronic Switches (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

PURPOSE:To prevent the occurrence of malfunction due to a mutual interference even if a large number of photoelectric switches are placed in parallel, by a method wherein noise is prevented from exercising the influence by detecting the presence of the noise during a period right before a projecting pulse is generated and by delaying the generation of the projecting pulse. CONSTITUTION:If a photo noise component is produced at a collecting signal i, an output k is produced from an AD circuit 33. The output k is inputted to an OR circuit 42, and thereby an extra pulse other than a Q-output of an FF12 is added to an output l of a circuit 42. As a result, an FF13 is caused to trigger excessively, whereby an output f of an AND gate 32 is immediately brought to LOW, and simultaneously, a timing of a projecting pulse e from an AND circuit 31 delays. Or, if a noise enters right before the projecting pulse e is going to be generated, the projecting pulse e is transmitted in delay by a time for which a photo noise will be lost. This prevents the occurrence of malfunction such as operations to process light, entering from other adjoining photo source switch, as a regular reflection light although the projecting pulse e is transmitted as it is, there is no an object to be detected, and there is also no reflection light.
JP56021892A 1981-02-17 1981-02-17 Photoelectric switch Granted JPS57136179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56021892A JPS57136179A (en) 1981-02-17 1981-02-17 Photoelectric switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56021892A JPS57136179A (en) 1981-02-17 1981-02-17 Photoelectric switch

Publications (2)

Publication Number Publication Date
JPS57136179A true JPS57136179A (en) 1982-08-23
JPS627733B2 JPS627733B2 (en) 1987-02-19

Family

ID=12067752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56021892A Granted JPS57136179A (en) 1981-02-17 1981-02-17 Photoelectric switch

Country Status (1)

Country Link
JP (1) JPS57136179A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6175280A (en) * 1984-09-20 1986-04-17 Koito Ind Co Ltd Photoelectric type object detector
JPS61137420A (en) * 1984-12-07 1986-06-25 Takenaka Denshi Kogyo Kk Method for discriminating signal in photoelectric switch
JPS61170083U (en) * 1985-04-11 1986-10-22
JPS6243187A (en) * 1985-08-20 1987-02-25 Sharp Corp Optical modulation-form detector
JPH027592U (en) * 1988-06-30 1990-01-18
JPH0415083U (en) * 1990-05-22 1992-02-06
JPH06169248A (en) * 1992-11-30 1994-06-14 Sunx Ltd Photoelectric switch
US6858832B2 (en) 2001-10-29 2005-02-22 Sunx Limited Photoelectric sensor having time changing means

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6590553B2 (en) 2015-06-29 2019-10-16 アズビル株式会社 Photoelectric sensor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6175280A (en) * 1984-09-20 1986-04-17 Koito Ind Co Ltd Photoelectric type object detector
JPS61137420A (en) * 1984-12-07 1986-06-25 Takenaka Denshi Kogyo Kk Method for discriminating signal in photoelectric switch
JPH0351332B2 (en) * 1984-12-07 1991-08-06 Takenaka Electronic Ind
JPS61170083U (en) * 1985-04-11 1986-10-22
JPS6243187A (en) * 1985-08-20 1987-02-25 Sharp Corp Optical modulation-form detector
JPH047958B2 (en) * 1985-08-20 1992-02-13 Sharp Kk
JPH027592U (en) * 1988-06-30 1990-01-18
JPH0415083U (en) * 1990-05-22 1992-02-06
JPH06169248A (en) * 1992-11-30 1994-06-14 Sunx Ltd Photoelectric switch
US6858832B2 (en) 2001-10-29 2005-02-22 Sunx Limited Photoelectric sensor having time changing means

Also Published As

Publication number Publication date
JPS627733B2 (en) 1987-02-19

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