Abstract: A perspiration mapping patch according to the present disclosure is attached to skin of a user to absorb sweat, and includes: a sweat absorbing layer in which a plurality of opening units is arranged: a first support layer which is stacked on a first surface of the sweat absorbing layer and includes an opening opened to correspond to each of the plurality of opening units: and a second support layer stacked on a second surface facing an opposite side of the first surface of the sweat absorbing layer.

Abstract: Disclosed is an electronic skin sensor patch which is attached to a skin of a user and measures a bio signal, the electronic skin sensor patch including: a patch body including a frame which is formed with an opening and is made of a mechanical metamaterial; a sensing unit disposed on a first region of the patch body; a sensor system unit disposed on a second region of the patch body and configured to maintain a nonadherent state with the skin; and a wiring disposed along the frame of the patch body and configured to connect the sensing unit and the sensor system unit.

Abstract: A wearable device according to the present disclosure includes: a communication portion; a body fluid sensor configured to measure conductivity in body fluid; and a controller configured to control the communication portion to transmit conductivity data to an external device in response to the frequency of rapid change in the conductivity.