Apparatus and device for determining the piston stroke in hydraulic cylinders, with the aid of ultrasound

摘要

The invention describes a measurement device using the ultrasound pulse propagation time (delay time) method, in each case one sound transducer being mounted on the piston base and on the cylinder base within a hydraulic cylinder. The sound transducer function can be operated in an alternating manner. The transmitted energy is passed into the hydraulic system, via the bases, integrated transformers [sic].