Vorrichtung zum Bestimmen von Zug- und Druckspannungen im Inneren eines Materials oder Werkstuecks in Messebenen, die sich in verschiedenen Tiefenlagen befinden

The invention relates to a device for determining tensile and compressive stresses in the interior of materials or workpieces by means of sensors (6), e.g. strain gauges, which are arranged in a measuring device (1) to measure linear changes in shape, whereby a) several measuring devices (1) are provided in a measuring plane (7), b) each measuring device (1) consists of several sensors (6) which are provided on one side (outside) with measuring probes (2) for coupling to the material (3) and at its other end (internal) to a pressure device (4a, 4b, 4c).