JPS57125304A - Device for checking surface of cylindrical body - Google Patents

Device for checking surface of cylindrical body

Info

Publication number
JPS57125304A
JPS57125304A JP963781A JP963781A JPS57125304A JP S57125304 A JPS57125304 A JP S57125304A JP 963781 A JP963781 A JP 963781A JP 963781 A JP963781 A JP 963781A JP S57125304 A JPS57125304 A JP S57125304A
Authority
JP
Japan
Prior art keywords
circuit
inputted
minimum value
signals
parts
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
JP963781A
Other languages
Japanese (ja)
Other versions
JPS6355656B2 (en
Inventor
Michiaki Miyagawa
Yutaka Yunoki
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji Electric Manufacturing Co 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 Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP963781A priority Critical patent/JPS57125304A/en
Publication of JPS57125304A publication Critical patent/JPS57125304A/en
Publication of JPS6355656B2 publication Critical patent/JPS6355656B2/ja
Granted legal-status Critical Current

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
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
    • G01B11/303—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces using photoelectric detection means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE:To implement the high speed checking processing by comparing the minimum value of the interval between the pulses of a binary coded signal of a sensor output based on the reflected light from the surface to be checked with a specified threshold value. CONSTITUTION:The reflected light from the rotating surface to be checked having seamed parts is detected by a fiber sensor 601. The output thereof is guided to polarity discriminating circuits 606-608 through BPFs 603-605 having different cut off frequencies, and only one polarity is extracted. The signals are compared with a specified DC level in comparators 609-611, coded to the binary signals, and inputted to preprocessing circuits 612-614. Parts of the signals are directly inputted to a pulse interval measuring circuit 616, the other parts are inputted to the circuit 616 through an OR circuit 615, and the pulse interval is obtained. The signal from the circuit 616 is inputted to a minimum value detecting circuit 617, and the minimum value of the pulse interval is compared with the threshold value in a judging circuit 618. If the signal is small, it is determined that the product is defective. Thus the high speed checking process can be implemented by the inexpensive means.
JP963781A 1981-01-27 1981-01-27 Device for checking surface of cylindrical body Granted JPS57125304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP963781A JPS57125304A (en) 1981-01-27 1981-01-27 Device for checking surface of cylindrical body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP963781A JPS57125304A (en) 1981-01-27 1981-01-27 Device for checking surface of cylindrical body

Publications (2)

Publication Number Publication Date
JPS57125304A true JPS57125304A (en) 1982-08-04
JPS6355656B2 JPS6355656B2 (en) 1988-11-04

Family

ID=11725738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP963781A Granted JPS57125304A (en) 1981-01-27 1981-01-27 Device for checking surface of cylindrical body

Country Status (1)

Country Link
JP (1) JPS57125304A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172006A (en) * 1985-01-25 1986-08-02 Nippon Steel Corp Welded step meter of pipe seam part

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5554341A (en) * 1978-10-02 1980-04-21 Eastman Kodak Co Composition and photograph factor containg it

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5554341A (en) * 1978-10-02 1980-04-21 Eastman Kodak Co Composition and photograph factor containg it

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172006A (en) * 1985-01-25 1986-08-02 Nippon Steel Corp Welded step meter of pipe seam part
JPH0372926B2 (en) * 1985-01-25 1991-11-20 Nippon Steel Corp

Also Published As

Publication number Publication date
JPS6355656B2 (en) 1988-11-04

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