Conductive-thread sensor nodes woven into the fabric detect the skin's electrical/mechanical pulse and relay it along the textile's own conductive mesh, the same principle used in e-textile ECG shirts:
pulse(t) = sin(2π·(bpm/60)·t)^18 // sharp cardiac-like pulse shape
alert = 1 if bpm > 100·sensitivity_inv or bpm < 50
signal reaches node at distance d after t_d = d / v_prop
- Heart rate — beats per minute driving the pulse generator at the chest node.
- Sensor sensitivity — how easily a node's threshold trips into an "alert" glow; lower values make the fabric more conservative.
- Signal propagation — the speed at which each pulse ripples outward through the conductive thread mesh to reach every node.
- Activity presets — snap to a resting, exercise or stress heart-rate profile.
Real biosensor fabrics like this are used in wearable ECG shirts and athletic garments that stream heart-rate and strain data continuously without a rigid chest strap.