Abstract: The application provides a catheter positioning device for a catheter with a detection electrode. The device includes three pairs of excitation electrodes. The excitation electrode pairs are respectively lie on an X-axis, a Y-axis, and a Z-axis of a coordinate system. The device also includes a signal generator for providing excitation signals to the respective pairs of excitation electrodes. The device further includes a computing processing unit for measuring differential voltage indicative of impedance between the detection electrode and a first pair of excitation electrodes for determining an X coordinate of a position of the catheter, for measuring differential voltage indicative of impedance between the detection electrode and a second pair of excitation electrodes for determining a Y coordinate of the position, and for measuring differential voltage indicative of impedance between the detection electrode and a third pair of excitation electrodes for determining a Z coordinate of the position.

Abstract: Antiglare system for a crash helmet with an outer and an inner helmet shell that has an eyeport that can be closed by a visor and that can be partially covered by a sunshade, wherein the sunshade has at least one first antiglare module and covers the eyeport in a upper region such a way that the sunshade is located above a horizontal line of sight and outside of a vertical field of vision when the wearer's head is in a relaxed, fairly upright position, and wherein the sunshade extends into the vertical field of vision when the helmet wearer's head is tilted forward.