JPS564003A - System for detecting edge of moving body - Google Patents

System for detecting edge of moving body

Info

Publication number
JPS564003A
JPS564003A JP7866379A JP7866379A JPS564003A JP S564003 A JPS564003 A JP S564003A JP 7866379 A JP7866379 A JP 7866379A JP 7866379 A JP7866379 A JP 7866379A JP S564003 A JPS564003 A JP S564003A
Authority
JP
Japan
Prior art keywords
signal
time series
photoelectric
rising
moving average
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
JP7866379A
Other languages
Japanese (ja)
Other versions
JPS6226402B2 (en
Inventor
Noriyoshi Hashimoto
Akitsugu Yamada
Mitsuzumi Osumi
Hiroyuki Asanuma
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.)
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
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 Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP7866379A priority Critical patent/JPS564003A/en
Publication of JPS564003A publication Critical patent/JPS564003A/en
Publication of JPS6226402B2 publication Critical patent/JPS6226402B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE: To remove occurrence of any erroneous operation and detect edges with high accuracy by detecting the rising or falling point of a differential signal between the time series signal of a photoelectric output and its moving average signal.
CONSTITUTION: Photoelectric elements of an array 4 provided with a plurality of photoelectric elements arranged in a line are respectively subjected to sampling scanning, and the time series signals of the photoelectric outputs from the photoelectric elements respectively by means of a sampling and holding circuit 8, an amplifier 9 and an A/D converter 10. The moving average signal of the time series signal of a predetermined average number is obtained by resistors 11 and 12, an addition circuit 13, and a dividing circuit 14. The differential signal between the time series signal and the moving average signal is sought by subtraction circuits 15 and 16. The rising or falling time point of this differential signal is detected and the position of the edge is detected by the rising or falling time point.
COPYRIGHT: (C)1981,JPO&Japio
JP7866379A 1979-06-23 1979-06-23 System for detecting edge of moving body Granted JPS564003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7866379A JPS564003A (en) 1979-06-23 1979-06-23 System for detecting edge of moving body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7866379A JPS564003A (en) 1979-06-23 1979-06-23 System for detecting edge of moving body

Publications (2)

Publication Number Publication Date
JPS564003A true JPS564003A (en) 1981-01-16
JPS6226402B2 JPS6226402B2 (en) 1987-06-09

Family

ID=13668093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7866379A Granted JPS564003A (en) 1979-06-23 1979-06-23 System for detecting edge of moving body

Country Status (1)

Country Link
JP (1) JPS564003A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61134610A (en) * 1984-12-04 1986-06-21 ケーニツヒ・ウント・バウエル・アクチエンゲゼルシヤフト Measuring head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61134610A (en) * 1984-12-04 1986-06-21 ケーニツヒ・ウント・バウエル・アクチエンゲゼルシヤフト Measuring head

Also Published As

Publication number Publication date
JPS6226402B2 (en) 1987-06-09

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