GB1224348A - Arrangement for reproducing prescribed loadings, particularly in the case of testing machines or testing apparatus - Google Patents

Arrangement for reproducing prescribed loadings, particularly in the case of testing machines or testing apparatus

Info

Publication number
GB1224348A
GB1224348A GB3553668A GB3553668A GB1224348A GB 1224348 A GB1224348 A GB 1224348A GB 3553668 A GB3553668 A GB 3553668A GB 3553668 A GB3553668 A GB 3553668A GB 1224348 A GB1224348 A GB 1224348A
Authority
GB
United Kingdom
Prior art keywords
load
amplifier
output
fed
input
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.)
Expired
Application number
GB3553668A
Inventor
Heinz Kreitskorte
Hans Dieter Weber
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.)
Carl Schenck AG
Original Assignee
Carl Schenck Maschinenfabrik GmbH
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 Carl Schenck Maschinenfabrik GmbH filed Critical Carl Schenck Maschinenfabrik GmbH
Priority to GB3553668A priority Critical patent/GB1224348A/en
Publication of GB1224348A publication Critical patent/GB1224348A/en
Expired 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
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/12—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using record carriers
    • G05B19/14—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using record carriers using punched cards or tapes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

1,224,348. Programmed control of testing. CARL SCHENCK MASCHINENFABRIK G.m.b.H. July 25, 1968, No.35536/68. Heading G3N. An arrangement for testing a specimen in accordance with a predetermined test programme comprises a loading device, a load measuring transducer and a means for adjusting the loading device in dependence on a comparison between an actual load value derived from the transducer and a desired value derived from a programme circuit receiving predetermined test instructions comprising an ultimate desired load and the rate of change of load to achieve that load. As shown a test member 1 is clamped between a plunger 6 of a cylinder 5 and a holder 2 incorporating a load detector 3 connected to amplifiers 8, 25. The output of amplifier 8; which is proportional to the force applied to the member, is fed to an input of a differential amplifier 10 the other input of which is fed with a compensated desired value on a line 20. The output of the differential amplifier controls a servovalve 7 controlling the flow to the cylinder 5. A punched tape, containing digital values, representative of desired peak values of force and the rate at which this force is attained, is read by a scanning device 12 and the desired peak value fed to a potentiometer 14 the output of which is applied to an input of a differential amplifier 16 where it is compared with the actual value of the load from the amplifier 25 or, by operation of a switch 22, with the compensated input to the differential amplifier 10. The output potential of amplifier 16 is fed to a Schmitt trigger 17 the output from which is fed through a potentiometer 18 to an integrating device 19 providing the compensated desired value. The time constant of the integration of the compensated desired value is controlled by an adjusting device 29, responsive to data read from the tape, and sets the potentiometer 18, of the integrator 19, or the Schmitt trigger 17. It is stated that the switch 22 can be connected to the output of amplifier 8; amplifier 25 being no longer needed. In an alternative embodiment, Fig.2 (not shown) facilities are provided for a sinusiodal loading pattern the frequency and peak values of which are maintained constant for a specified number of load alternations.
GB3553668A 1968-07-25 1968-07-25 Arrangement for reproducing prescribed loadings, particularly in the case of testing machines or testing apparatus Expired GB1224348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3553668A GB1224348A (en) 1968-07-25 1968-07-25 Arrangement for reproducing prescribed loadings, particularly in the case of testing machines or testing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3553668A GB1224348A (en) 1968-07-25 1968-07-25 Arrangement for reproducing prescribed loadings, particularly in the case of testing machines or testing apparatus

Publications (1)

Publication Number Publication Date
GB1224348A true GB1224348A (en) 1971-03-10

Family

ID=10378832

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3553668A Expired GB1224348A (en) 1968-07-25 1968-07-25 Arrangement for reproducing prescribed loadings, particularly in the case of testing machines or testing apparatus

Country Status (1)

Country Link
GB (1) GB1224348A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2249084A1 (en) * 2002-05-14 2006-03-16 General Electric Company Methods and apparatus for determining resilience of spring washers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2249084A1 (en) * 2002-05-14 2006-03-16 General Electric Company Methods and apparatus for determining resilience of spring washers

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