Signal Pipeline

From ward bed to nurse station in 5 seconds

Sample Rate200 Hz
Channels4
ADC12-bit
Latency<50 ms
SNR58.6 dB
TX Interval5 s
ProtocolBLE 5.0
Range27 m
ACQUIRE4 ch · 200 Hz

Slides onto the forehead. No adhesive, no gel, no wires. Elastic silicone maintains consistent sensor contact.

AMPLIFY58.6 dB SNR

Four sensors sample simultaneously — pulse at 200 Hz, temperature at 1 Hz, acoustics at 16 kHz.

PROCESS<50 ms latency

On-board signal fusion rejects motion artifacts and weights channels by SNR. Under 50ms latency.

TRANSMITBLE 5.0 · 5 s

Composite vital signs transmit every 5 seconds via BLE 5.0 to bedside dashboard, nurse station, and EHR.

4-stage on-device processing · end-to-end <50 ms

Continuous Monitoring

17,280 data points per day. Not 3.

Continuous surveillance replaces intermittent sampling. Deterioration detected in seconds, not hours.

Pulse Waveform

Temperature

35.0°C

Heart Rate Trend

Respiratory Rate

Specifications

Technical Specifications

Sensors

PVDF piezoelectricTE LDT1-028K ×2, bilateral
TemperatureTI TMP117, ±0.15°C
AccelerometerST LIS3DH, tri-axis
MicrophoneTDK ICS-43434, 65 dBA SNR

Performance

Pulse sampling rate200 Hz
Temperature sampling1 Hz
Acoustic sampling16 kHz
Processing latency<50ms
Data points per 24hrs17,280
Battery life18–24 hours
Charge time~90 min

Design

Weight<45g
PCB2-layer flex, 185mm × 35mm
HousingMedical-grade silicone
SoCNordic nRF52840

Connectivity

BLE5.0
Range27m (22dB margin at 5m)

Cost

Prototype (5 units)$46/unit
1K volume$19/unit
10K volume$13/unit

License

HardwareCERN OHL v2

Validation

Computational Validation

Monte Carlo simulation (n=10,000) projects ±2.0 bpm heart rate accuracy and ±0.15°C temperature accuracy at 95th percentile. Circuit simulation confirms 58.6 dB end-to-end SNR.

Clinical validation with hospitalized patients planned as next development phase.