Strain measuring device e.g. for mountains, has ultrasonic sensors provided in boreholes and measurement of ultrasonic parameters does not directly take place in mountains but in borehole probes which record strain

摘要

The device has ultrasonic sensors provided in boreholes (1). The measurement of the ultrasonic parameters does not directly take place in the mountains, but in borehole probes which record the strain. A non-converging medium (4) is contained in the probe. A strain is increased with height and takes place via continuous cross-sectional change in strain direction.