A sensor structure includes a housing arranged to be attached to a body； a thermoelectric generator element in the housing and configured to convert temperature gradient into electric energy； a heat collecting surface coupled to the housing on a side arranged to face a skin when the body is coupled to a user of the sensor structure； a heat conduction channel coupled between the heat collecting surface and the thermoelectric generator element, wherein a cross-sectional area of the heat conduction channel is smaller than the heat collecting surface； and a heat sink coupled to the housing on a side arranged to face away from the skin when the body is coupled to the user.
