Patent ID: 6815945
Filing Date: 2004-11-09
Classification: E21B,G01V

Abstract:
A measuring device for detecting a body moving relative to a tubular container, the measuring device comprising:a plurality of magnetic units associated with the container and/or the body, the magnetic units each being configurable for use as either a magnetic field-generating unit or a magnetic field-measuring unit; one or more magnetic units being configured as magnetic field generating units generating a magnetic flux and one or more magnetic units being configured as magnetic field-measuring units measuring the magnetic flux; at least one evaluating device connected with the magnetic field-measuring units for receiving measurement signals of the magnetic field-measuring units; and the magnetic field-measuring units having a maximum magnetic flux essentially perpendicular to the direction of the relative motion of the body and container and the magnetic field-measuring units in at least one plane of arrangement being arranged perpendicular to the relative direction of motion.