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 apparatusInfo
- 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
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.
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)
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 |
-
1968
- 1968-07-25 GB GB3553668A patent/GB1224348A/en not_active Expired
Cited By (1)
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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