Medical parameter e.g. heart frequency, measuring device for sportsman, has inductor that is placed in sports shoe or around metatarsal in shoe, where parameter is derived from strength of low frequency changes of impedance of inductor

摘要

The device has an inductor (L1) that is placed in a sports shoe or around a metatarsal in the shoe. A complex impedance of the inductor or a transmission parameter of the inductor representing the impedance is measured by an impedance measuring switch with measuring frequency. Low frequency changes of the complex impedance are determined by an evaluation unit (IC2). A medical parameter e.g. heart frequency, is derived from a temporal flow or strength of the changes. The inductor is provided as a transmission antenna that transmits a pulse signal to an external display unit.