JPS57165741A - Fracture detector - Google Patents

Fracture detector

Info

Publication number
JPS57165741A
JPS57165741A JP5060981A JP5060981A JPS57165741A JP S57165741 A JPS57165741 A JP S57165741A JP 5060981 A JP5060981 A JP 5060981A JP 5060981 A JP5060981 A JP 5060981A JP S57165741 A JPS57165741 A JP S57165741A
Authority
JP
Japan
Prior art keywords
velocity
signal
fracture
detector
detected
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
JP5060981A
Other languages
Japanese (ja)
Inventor
Hidetaka Katsumura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5060981A priority Critical patent/JPS57165741A/en
Publication of JPS57165741A publication Critical patent/JPS57165741A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N19/00—Investigating materials by mechanical methods
    • G01N19/08—Detecting presence of flaws or irregularities

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To unnecessitate any special measures for installation, maintenance, inspection and the like, by making a detector judge the fracture of a substance to be machined from the state of a change in velocity of a velocity controlling motor. CONSTITUTION:When fracture is generated in a substance to be machined, a load torque of a motor 1M increases and a velocity falls. This fluctuation of velocity is detected by a velocity detector 1TG, and a detection signal e1 is differentiated and given, as a signal e11, to a NOT circuit 7 and thereby it is made to be a signal e12. Meanwhile, a load torque of a motor 2M decreases and avelocity rises. this fluctuation of velocity is detected by a velocity detector 2TG and a detection signal e2 is differentiated to be a signal e21. The signals e12 and e21 each are given to an AND circuit 8, and an output e'A is given to FF10 only when an output ex of a NOR circuit 9 in the absence of fracture detection signals eB, eC...-eN is ''1'', and thus an output eA of FF10 is obtained. By this signal eA, the generation of the fracture is detected.
JP5060981A 1981-04-06 1981-04-06 Fracture detector Pending JPS57165741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5060981A JPS57165741A (en) 1981-04-06 1981-04-06 Fracture detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5060981A JPS57165741A (en) 1981-04-06 1981-04-06 Fracture detector

Publications (1)

Publication Number Publication Date
JPS57165741A true JPS57165741A (en) 1982-10-12

Family

ID=12863704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5060981A Pending JPS57165741A (en) 1981-04-06 1981-04-06 Fracture detector

Country Status (1)

Country Link
JP (1) JPS57165741A (en)

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