Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1989-10-06
1990-10-16
Raevis, Robert
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
G01L 124
Patent
active
049626698
ABSTRACT:
A method for measuring deformations of test samples in testing machines is carried out in a device including a light source, a detector, and signal processing circuitry. The deformations are sensed in that a light beam (2) from the light source (1) is reflected by at least one mirror (6, 6', 6a, 6b, 11a, 11b) arranged at an appropriate location, for example, directly on the test sample (4) so that test sample movements are imparted directly or indirectly to the reflecting mirror or mirrors, whereby the reflected light beam impinges upon a position detector (7) and the position of the impingement or rather its movement is determined and evaluated in an electronic evaluating circuit (8). This movement is a direct measure of the deformation. The device includes components for carrying out these method steps, whereby it is possible to measure static and/or dynamic deformations caused by tensile and compressive forces, as well as deformations resulting from twisting torques and bending moments. Furthermore, it is possible to simultaneously measure several different deformation types.
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Journal of Scientific Instruments (Journal of Physics E) 1969 Series 2, vol. 2; pp. 375-377, Article Entitled: "The Application of a Light-Sensitive Potentiometer in the Measurement of the Mechanical Properties of Single Fibers".
Gernhart Peter
Hintz Gerhart
Keller Guenter
Treusch Werner
Zoeller Karl
Carl Schenck AG
Fasse W. G.
Kane, Jr. D. H.
Raevis Robert
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