JPS56141504A - Automatic detection for cut position mark of natural material such as timber - Google Patents

Automatic detection for cut position mark of natural material such as timber

Info

Publication number
JPS56141504A
JPS56141504A JP4420780A JP4420780A JPS56141504A JP S56141504 A JPS56141504 A JP S56141504A JP 4420780 A JP4420780 A JP 4420780A JP 4420780 A JP4420780 A JP 4420780A JP S56141504 A JPS56141504 A JP S56141504A
Authority
JP
Japan
Prior art keywords
mark
timber
natural material
same
automatic detection
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
JP4420780A
Other languages
Japanese (ja)
Inventor
Takashi Yamanashi
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.)
MATSUNAGA IRON WORKS
MATSUNAGA TEKKOSHO KK
Original Assignee
MATSUNAGA IRON WORKS
MATSUNAGA TEKKOSHO 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 MATSUNAGA IRON WORKS, MATSUNAGA TEKKOSHO KK filed Critical MATSUNAGA IRON WORKS
Priority to JP4420780A priority Critical patent/JPS56141504A/en
Publication of JPS56141504A publication Critical patent/JPS56141504A/en
Pending 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
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/028—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring lateral position of a boundary of the object

Abstract

PURPOSE:To surely detect a mark which is not affected by the hue and tone of a natural material such as timber by coating said mark on the surface of said natural material, detecting the reflection of the projected light from the mark and two points near the same with three optical sensors and comparing the same. CONSTITUTION:A mark 2 is coated on a natural material 1 such as timber by a timber ink. When te timber 1 is moved in an arrow direction by a conveyor, the mark 2 is irradiated by a light source 3, and the reflected rays from the point on the mark and the two points near the same and outside the mark are imaged via a lens 5 on three photodetectors 6a, 6o, 6b of a photodetecting part 4. The outputs thereof are inputted to differential amplifiers P, Q via amplifiers A, O, B. The outputs (p), (q) corresponding to the differences in reflection between the point on the mark and the other two points are compared with set values in comparators P', Q', and the passage of the mark line 2 is detected by the output (x) thereof via an AND circuit X. Thereby, the mark 2 is surely detected.
JP4420780A 1980-04-04 1980-04-04 Automatic detection for cut position mark of natural material such as timber Pending JPS56141504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4420780A JPS56141504A (en) 1980-04-04 1980-04-04 Automatic detection for cut position mark of natural material such as timber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4420780A JPS56141504A (en) 1980-04-04 1980-04-04 Automatic detection for cut position mark of natural material such as timber

Publications (1)

Publication Number Publication Date
JPS56141504A true JPS56141504A (en) 1981-11-05

Family

ID=12685105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4420780A Pending JPS56141504A (en) 1980-04-04 1980-04-04 Automatic detection for cut position mark of natural material such as timber

Country Status (1)

Country Link
JP (1) JPS56141504A (en)

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