FR2363095A1 - Aircraft structure fatigue states monitoring network - uses array of strain gauges connected to on=line data processor - Google Patents

Aircraft structure fatigue states monitoring network - uses array of strain gauges connected to on=line data processor

Info

Publication number
FR2363095A1
FR2363095A1 FR7625602A FR7625602A FR2363095A1 FR 2363095 A1 FR2363095 A1 FR 2363095A1 FR 7625602 A FR7625602 A FR 7625602A FR 7625602 A FR7625602 A FR 7625602A FR 2363095 A1 FR2363095 A1 FR 2363095A1
Authority
FR
France
Prior art keywords
strain gauges
array
data processor
line data
monitoring network
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
FR7625602A
Other languages
French (fr)
Other versions
FR2363095B1 (en
Inventor
Pierre Pinot
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.)
Societe de Fabrication dInstruments de Mesure SFIM SA
Original Assignee
Societe de Fabrication dInstruments de Mesure SFIM SA
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 Societe de Fabrication dInstruments de Mesure SFIM SA filed Critical Societe de Fabrication dInstruments de Mesure SFIM SA
Priority to FR7625602A priority Critical patent/FR2363095A1/en
Priority to DE19772737747 priority patent/DE2737747A1/en
Publication of FR2363095A1 publication Critical patent/FR2363095A1/en
Application granted granted Critical
Publication of FR2363095B1 publication Critical patent/FR2363095B1/fr
Granted 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)
  • Traffic Control Systems (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

A network is used for monitoring the fatigue state of certain aircraft structural components using an array of strain gauges attached to those components and providing signals through a multiplier to an online digital processor presented. An array (20) of strain gauges (10a, 10b...) is attached to the relevant components of the aircraft frame. It feeds signals to individual amplifiers (30) and to a multiplexer (40) serviced by a digital processor via a suitable analogue to digital converter (50). The processor consists of a synchronizing unit (80) and a number of linked storage units (90, 100, 110) which detect the number of times any individual strain gauge signal crosses a threshold region without immediate recovery according to a given algorithm. The thresholds themselves are specified via a special input unit (120).
FR7625602A 1976-08-24 1976-08-24 Aircraft structure fatigue states monitoring network - uses array of strain gauges connected to on=line data processor Granted FR2363095A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7625602A FR2363095A1 (en) 1976-08-24 1976-08-24 Aircraft structure fatigue states monitoring network - uses array of strain gauges connected to on=line data processor
DE19772737747 DE2737747A1 (en) 1976-08-24 1977-08-22 MEASURING METHOD AND DEVICE FOR THE ELEMENTATION CONDITION OF A PART

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7625602A FR2363095A1 (en) 1976-08-24 1976-08-24 Aircraft structure fatigue states monitoring network - uses array of strain gauges connected to on=line data processor

Publications (2)

Publication Number Publication Date
FR2363095A1 true FR2363095A1 (en) 1978-03-24
FR2363095B1 FR2363095B1 (en) 1979-01-12

Family

ID=9177106

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7625602A Granted FR2363095A1 (en) 1976-08-24 1976-08-24 Aircraft structure fatigue states monitoring network - uses array of strain gauges connected to on=line data processor

Country Status (2)

Country Link
DE (1) DE2737747A1 (en)
FR (1) FR2363095A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3421965A4 (en) * 2016-02-23 2019-10-02 Shimadzu Corporation Synchronization circuit for material tester and material tester

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3048964A1 (en) * 1980-12-24 1982-07-08 Mannesmann AG, 4000 Düsseldorf METHOD AND DEVICE FOR DETERMINING THE LOAD OF A LIFTER
DE3314181A1 (en) * 1983-04-19 1984-10-25 Kraftwerk Union AG, 4330 Mülheim METHOD FOR MONITORING THE FATIGUE OF COMPONENTS, e.g. IN NUCLEAR POWER PLANTS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3421965A4 (en) * 2016-02-23 2019-10-02 Shimadzu Corporation Synchronization circuit for material tester and material tester
US10866174B2 (en) 2016-02-23 2020-12-15 Shimadzu Corporation Synchronization circuit for material tester and material tester

Also Published As

Publication number Publication date
FR2363095B1 (en) 1979-01-12
DE2737747A1 (en) 1978-03-30

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Legal Events

Date Code Title Description
ST Notification of lapse