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PVDF sensor for heartbeat and respiration detection. (a) Schematic representation of the adhesion of the PVDF sensor and control sensor patch on the chest wall of a human body. Comparison of the electrical signals obtained from the control sensor, and the proposed PVDF sensor: (b) raw electrical signals, (c) filtered signals for heartbeat detection, and (d) filtered signals for respiration detection. Reprinted with permission from [107] © 2013 Elsevier.
