A SENSOR FOR EMBEDDING IN A CAST MATERIAL WHICH TRANSFERS A PRESSURE IN THE CAST MATERIAL TO AN ELECTRICAL SIGNAL AND A METHOD TO MEASURE PRESSURE IN A CAST MATERIAL

摘要

A sensor for embedding in a cast material which transfers a pressure in the cast material to an electrical signal comprising a volumetric body (2, 3; 9, 10; 17, 18), and a pressure sensitive electrical conductor (4, 6; 11; 19) which changes resistance as a function of pressure. The volumetric body (2, 3; 9, 10; 17, 18) is constructed in such a way that a hydrostatic pressure acting on the volumetric body is transferred to an approximately hydrostatic pressure acting on the pressure sensitive electrical conductor. The invention furthermore relates to a method of determining eigenstresses from a measured pressure using the sensor.