IoT Based Heart Activity Monitoring Using Inductive Sensors

Figure 1. Smart clothing for Electrocardiography ECG [23].

Figure 2. GreenCardioIoT system [14].

Figure 3. Experimental model block scheme: (a) Flowchart of the embedded software of inductive data acquisition and data transfer (b).

Figure 4. The electric field intensity of the sensor electrodes, simulated with Beladraw 1.0 software for an interdigital capacitance without water probe [24] (a) The electric field intensity of the sensor electrodes, simulated with Beladraw 1.0 software for an interdigital capacitance with water probe [24] (b).

Figure 5. Inductive proximity sensor: Simulated model. CH_0-activated (a) Inductive proximity sensor: simulated model, CH_1-activated (b).

Figure 6. Experimental model using an ADAS1000 demo-board.

Figure 7. Sequence of three seconds from an acquisition with sensor pressed. The periodicity of signal is visible. (a) Sequence of three seconds from acquisition with sensor not pressed. The periodicity of signal is difficult to be detected (b).

Figure 8. Acquisition with normal breath in the first part, and without breath in the second part of the signal.

Figure 9. Representation of the delay between the input signal (with blue) and the filtered signal (with red) (a) Representation of the overlap of the input signal and the filtered signal (the delay was eliminated) (b).

Figure 10. Representation of the difference signal (which mainly contains the periodic heart signal).