publication . Patent . 1990

Vorrichtung zur beruehrungslosen Erfassung eines Rissstarts bei einer Bruchmechanikprobe

Winkler, S.;
Open Access German
  • Published: 01 Jan 1990
  • Country: Germany
Abstract
A device for the contactless detection of initial crack formation (5) in a rupture mechanics sample (2) has a measuring device in which the sample (2) can be subjected to a load test by a loading element and a sensor (6, 10, 12) arranged at a predefined distance from the sample (2); the sensor can be connected to an analysis circuit (19). The sensor (6, 10, 12) comprises at least one capacitive sensor plate (7, 7') connected to an impedance converter (12) located in the direct vicinity of the sensor plate (7, 7'). One capacitive sensor plate (7) is connected to the complementary sensor plate (7') or tied to ground via a drainage resistor (10). The electric field...
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