JPS56117146A - Measuring apparatus of internal friction - Google Patents

Measuring apparatus of internal friction

Info

Publication number
JPS56117146A
JPS56117146A JP2062080A JP2062080A JPS56117146A JP S56117146 A JPS56117146 A JP S56117146A JP 2062080 A JP2062080 A JP 2062080A JP 2062080 A JP2062080 A JP 2062080A JP S56117146 A JPS56117146 A JP S56117146A
Authority
JP
Japan
Prior art keywords
sample
output
chopper
frequency
loop
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
JP2062080A
Other languages
Japanese (ja)
Inventor
Ryozo Kato
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.)
SHINKU RIKO KK
Original Assignee
SHINKU RIKO 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 SHINKU RIKO KK filed Critical SHINKU RIKO KK
Priority to JP2062080A priority Critical patent/JPS56117146A/en
Publication of JPS56117146A publication Critical patent/JPS56117146A/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
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces

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)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

PURPOSE:To prevent the parasitic oscillation of sample, by inputting the output of circuit detecting the displacement of the sample to the chopper and driving said chopper by the output of phase-locked-loop responding to a narrow range of frequency. CONSTITUTION:The sample 2 hung down from the base board 1 by the hanging wire 3, is oscillated by the oscillator 4 and its displacement is detected by the pickup 5. Further, its output is inputted to the displacement detecting circuit 6 and is supplied to the chopper 8 through the amplitude detecting circuit 7 and the variation of energy in accordance with the internal friction of the sample is obtained from the out going line 12. Moreover, the chopper 8 is driven by the output of the phase-locked-loop 13 to operate the oscillator 4 through the output circuit 9. Accordingly, the parasitic oscillation of the sample 2 is prevented and also, the frequency of oscillation is easily varied because said loop 13 responds only to a narrow range of the frequency.
JP2062080A 1980-02-21 1980-02-21 Measuring apparatus of internal friction Pending JPS56117146A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2062080A JPS56117146A (en) 1980-02-21 1980-02-21 Measuring apparatus of internal friction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2062080A JPS56117146A (en) 1980-02-21 1980-02-21 Measuring apparatus of internal friction

Publications (1)

Publication Number Publication Date
JPS56117146A true JPS56117146A (en) 1981-09-14

Family

ID=12032282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2062080A Pending JPS56117146A (en) 1980-02-21 1980-02-21 Measuring apparatus of internal friction

Country Status (1)

Country Link
JP (1) JPS56117146A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54123992A (en) * 1978-02-24 1979-09-26 Du Pont Method and device for measuring coefficient of loss of material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54123992A (en) * 1978-02-24 1979-09-26 Du Pont Method and device for measuring coefficient of loss of material

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