Smart Police Wearable: Real-Time Officer Health Monitoring & SOS Alert System
Development of a rugged smart watch for police officers featuring SpO2, heart rate, body temperature, environmental sensors (temperature, humidity, air quality), GPS tracking, and SOS alert system. Deployed to 15,000+ officers for real-time health monitoring and emergency response.
The Challenge
A state police department needed a comprehensive wearable solution to monitor officer health during duty, especially in extreme conditions, and provide instant emergency alerts when officers face life-threatening situations.
Officer Health Risks
Police officers face heat stroke, exhaustion, and cardiac events during demanding duties. No system existed to monitor their health in real-time.
Impact: 200+ heat-related incidents/yearHazardous Environments
Officers often work in environments with poor air quality, extreme temperatures, or chemical hazards without awareness of the risks.
Impact: Long-term health effectsEmergency Response Delays
When officers face danger, calling for backup takes precious seconds. An automatic, instant SOS system was needed.
Impact: Critical response time gapRugged Requirements
The device needed to survive impacts, water, dust, and continuous 12+ hour shifts in challenging Indian climatic conditions.
Impact: IP68 + MIL-STD durabilityOur Solution
We developed a military-grade smart watch with comprehensive health monitoring, environmental sensing, GPS tracking, and a one-touch SOS system that instantly alerts command centers and nearby officers.
System Architecture
End-to-end officer safety platform with wearable device, mobile app, and command center dashboard.
Smart Watch Device
- PPG sensor for SpO2 and heart rate
- Infrared body temperature sensor
- Environmental temp & humidity sensor
- Air quality sensor (PM2.5, VOC, CO)
- GPS + GLONASS positioning
- SOS button with haptic feedback
- BLE 5.0 + 4G LTE connectivity
Officer Mobile App
- Real-time health dashboard
- Environmental hazard alerts
- Team member locations
- Voice communication
- Incident reporting
Command Center
- Real-time officer tracking map
- Health anomaly alerts
- SOS incident management
- Resource dispatch system
- Historical analytics & reporting
Custom Hardware Design
| MCU | nRF9160 (LTE-M + GPS) |
| SpO2/HR Sensor | MAX30102 PPG |
| Body Temp | MLX90614 IR sensor |
| Env Temp/Humidity | SHT40 (±0.2°C accuracy) |
| Air Quality | BME680 + PMS5003 PM sensor |
| Battery | 450mAh Li-Poly |
| Display | 1.4" AMOLED always-on |
| Protection | IP68 + MIL-STD-810H |
Real-Time Monitoring Firmware
- Continuous SpO2 monitoring with 94-100% accuracy
- Heart rate tracking with arrhythmia detection
- Body temperature monitoring every 30 seconds
- Environmental hazard detection and alerts
- Air quality index calculation (AQI)
- GPS tracking with configurable intervals
- One-touch SOS with fall detection
- Encrypted communication (AES-256)
- 72-hour battery optimization algorithms
Implementation Timeline
Phase 1: Requirements & Design
6 weeks- Field study with officers across units
- Use case analysis for different duty types
- Security and encryption requirements
- System architecture design
Phase 2: Hardware Development
14 weeks- Multi-sensor PCB design (8-layer)
- Ruggedized enclosure design
- Antenna optimization (LTE + GPS)
- MIL-STD-810H testing
- 4 prototype iterations
Phase 3: Firmware Development
12 weeks- Real-time sensor fusion algorithms
- Power optimization for 72hr battery
- SOS system with redundancy
- Secure boot and encrypted OTA
Phase 4: Platform Development
10 weeks- Command center dashboard
- Mobile app for officers
- Backend infrastructure (AWS GovCloud)
- CAD system integration
Phase 5: Pilot & Deployment
8 weeks- 500-officer pilot program
- Field testing in multiple conditions
- Training program development
- Phased rollout to 15,000 officers
Results & Impact
The Smart Police Wearable has been deployed to 15,000+ officers, enabling real-time health monitoring and significantly improving emergency response times. The system has directly contributed to saving officer lives.
Officers Protected
State-wide deployment
SOS Response Time
Alert to command center
Battery Life
6 duty shifts per charge
Heat Incidents Prevented
Early warning alerts
Lives Saved
Direct SOS interventions
Avg Backup Arrival
Faster response time
“This wearable has revolutionized how we protect our officers. The early heat stress warnings alone have prevented hundreds of incidents. When an officer triggers SOS, we know their exact location and health status instantly - that's saved lives.”
Director General of Police
State Police Department
Technologies Used
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