From optical PPG heart-rate/SpO2 and BIA bio-impedance to 6/9-axis motion sensing — a complete sensor-to-algorithm platform on ultra-low-power BLE5.0. A reference design for smart rings, bands and clinical-grade patches.
Continuous, contactless, medical-direction physiological data is moving from consumer electronics into health management, elder care and workplace wellness.
Heart rate, SpO2, blood-pressure trend and HRV tracked long-term, with anomaly alerts.
Sleep staging, respiratory rate, heart-rate variability and a sleep-quality score.
Step count, calories, training load and fatigue grading.
Fall detection (IMU), bed-exit / prolonged-rest anomalies, remote health warning.
Stress / fatigue assessment with reminders and intervention suggestions.
Wearable continuous data supplements out-of-hospital monitoring for remote follow-up.
Metrics derived by fusing optical, impedance and motion sensing on this platform, split into local output and cloud deep-analysis.
| Category | Metric | Typical range / grade | Local | Cloud |
|---|---|---|---|---|
| Cardiovascular | Heart rate (PPG) | Resting 60–100 bpm | Yes | Yes |
| SpO2 | SpO₂ saturation | 95–99% normal | Yes | Yes |
| Blood pressure | Systolic / Diastolic | 90–140 / 60–90 mmHg | Yes | Yes |
| Vascular | Microcirculation / vascular elasticity | >79 normal | Yes | Yes |
| Autonomic | HRV (heart-rate variability) | 22–120 ms | Yes | Yes |
| Cardiac rhythm | Arrhythmia | Yes / No | No | Yes |
| Respiration | Respiratory rate | 12–20 /min | No | Yes |
| Body temp | Skin temperature (optional) | Precision temp sensor | Yes | Yes |
| Status | Fatigue grade | 1 normal / 2 mild / 3 excessive | Yes | Yes |
| Activity | Step count / calories / fall | IMU fusion | Yes | Yes |
| Analytics | Heart-rate scatter plot | Long-term HR visualization | No | Yes |
Sensing and interconnect composition of a typical wearable host (e.g. a ring form factor).
| Subsystem | Key components / tech | Role |
|---|---|---|
| Optical HR/SpO2 | Self-developed PPG sensor (ZSPD40xx series) | Green/red dual-wavelength photoelectric acquisition, HR & SpO₂ |
| BIA | BIA sensor (ZSBM100X) | Body composition / human-contact detection / vitals aid |
| Motion sensing | 6-axis / 9-axis IMU (gyro + accelerometer) | Step count, posture, fall, gesture |
| Environment | Dual full-range absolute barometer (1260 / 4060 hPa) | Altitude / waterproof-depth aid |
| Body temp (optional) | Precision temp sensor | Skin-temperature trend |
| Capacitive sense | Qvar capacitive sensing | Near-field gesture / wear detection |
| Near field | NFC (optional) | Access / transit / payment |
| MCU / Wireless | Ultra-low-power BLE5.0 + embedded flash | Acquisition, pre-processing, OTA, mobile interconnect |
| Seen form factor | |
|---|---|
| Size | ≈ 8.5 × 2.8 mm (module cross-section) |
| Weight | ≈ 8 g |
| Housing | Titanium / stainless-steel plating / ceramic |
| Process | Full flexible FPC, PCBA width < 6.5 mm |
| Waterproof | 5ATM (≈ 50 m underwater) |
| Battery | 16–21 mAh Li-Po, wireless charge |
| Endurance | Standby ≈ 4 days, use 2–3 days |
| Charging | ≤ 1 h (wireless) |
| Operating temp | −20 ~ +50 ℃ |
| Size coverage | Multiple inner-diameter sizes optional |
Motion-artifact suppression, multi-wavelength fusion, adaptive gain — stable HR/SpO2 under motion.
Blood-pressure trend, HRV and microcirculation / vascular elasticity from PPG morphology & pulse-wave transit.
IMU + PPG fusion for sleep staging, step count, calories & fall detection.
Arrhythmia flagging, respiratory too-fast/too-slow, fatigue grade — local trigger + cloud review.
Real-time metrics local; long-term analytics (HR scatter plot etc.) to cloud — balancing power & depth.
BLE to mobile app; OTA, history, message/call alerts & multi-language.
The hard part of wearable vitals is not "can it measure" but "measures stably, low power, mass-producible and certifiable" — exactly BesTom's IDH strength.
In-house PPG (ZSPD40xx) & BIA (ZSBM100X) sensors with matching application design guides — closed loop from component to algorithm.
BLE5.0 MCU + embedded flash; mature acquisition—pre-processing—OTA chain; controllable battery life & size.
Full flexible FPC, <6.5 mm PCBA, multi-size housing experience — directly transferable to ring/band/patch.
PPG denoising, HRV, blood-pressure trend, sleep staging & anomaly-detection engineering.
Access to CE / FCC / RoHS and medical-related registration guidance, shortening time to market.
Shenzhen/Dongguan lines support pilot run to mass-production ramp; DFM, thermal simulation & EMC remediation integrated.
For stronger on-device vitals AI, pair with RK3568 / RK3576 / RV1126B.
On-device AI and sensor mass-production cases already landed.
Eval board, NRE, pilot run and certificationcadence — bring your form factor & metric targets.