AI Crowd Density Monitoring & Stampede Early-Warning System

Overview

The REDCOAST.LTD RC-CDM-700 is a grid-powered, permanently installed crowd density monitoring and stampede early-warning system for high-occupancy public spaces. It continuously measures how many people occupy each defined zone, converts that into density (people per square metre) and a Fruin-style crowd Level of Service (LOS A–F), and raises tiered alerts the moment a zone trends toward dangerous compression — typically minutes before a crush or stampede can develop. By fusing panoramic AI cameras, thermal imaging and mmWave radar on a self-developed edge platform, it stays accurate in darkness, glare, dust and dense packing where a single camera would fail. It is built for stadium concourses, transport interchanges, religious and pilgrimage sites, festivals, exhibition halls, stampede-prone corridors and stairways, giving safety operators the objective, real-time picture they need to slow inflow, open reserve routes and prevent tragedy rather than react to it.

Key Features

• Real-time density measurement in people/m² per zone, with configurable warning and critical thresholds independently set for entrances, corridors, stairs, platforms and open areas.
• Fruin Level of Service (LOS A–F) grading and directional flow-rate estimation (persons/metre/minute), the internationally recognised language of crowd safety planning.
• Triple-sensor fusion — panoramic/PTZ AI cameras + thermal imager + 77 GHz mmWave radar — for reliable counting in low light, backlight, haze, smoke and extreme packing where optical-only systems saturate.
• Multi-camera spatial fusion via homography projection onto a site plan, so overlapping fields of view are de-duplicated into one continuous density heat-map across large venues.
• Congestion forecasting: short-horizon trend prediction (build-up rate, time-to-threshold) that warns operators before a zone reaches critical, not after.
• Automated tiered response: dry-contact and IP interlocks drive public-address voice messages, variable message / guidance signs, gate and turnstile hold signals and control-room alarms without manual intervention.
• Edge-first architecture with on-device inference, so alerting continues even if the network or cloud link drops; privacy-preserving anonymous counting (no facial identity required).
• Self-developed hardware — multi-channel PoE++ camera interface board, edge AI inference board, thermal/IR sensor interface, I/O relay/interlock board and UPS power-management PCB — designed and manufactured in-house for full customisation.
• Open integration with existing VMS/CCTV, SCADA, BMS, ticketing and command-and-control platforms via ONVIF, RTSP, Modbus TCP, MQTT and REST APIs.

Technical Architecture

Each RC-CDM-700 sensing node combines up to four high-resolution AI cameras (fixed panoramic and/or PTZ), an optional long-wave thermal imager and a 77 GHz mmWave radar, all cabled back to a pole- or wall-mounted edge enclosure. Inside, REDCOAST.LTD's self-developed multi-channel PoE++ interface board powers and aggregates the cameras, while the edge AI inference board runs person-detection and density-estimation models (YOLO-family detectors plus crowd-density regression for saturated scenes) on a GPU/NPU compute module delivering up to 100+ TOPS. The thermal/IR interface board conditions the thermal stream for count validation in darkness and glare; the radar signal-conditioning path supplies motion, direction and count cross-checks when optical scenes are obscured.

Detections from every sensor are projected through calibrated homography onto a shared 2D site model, so counts are spatially correct and de-duplicated across overlapping views. The edge controller computes per-zone occupancy, density (people/m²), LOS grade, directional flow and build-up rate, evaluates them against per-zone rulebooks, and — through the self-developed I/O relay/interlock board — drives local PA, guidance signage and gate-hold outputs. Aggregated, anonymised metrics (never raw identities) stream over MQTT/REST to the REDCOAST.LTD crowd-management platform and mobile app, providing live heat-maps, zone dashboards, historical analytics, evidential event clips and cross-site command views. A UPS power-management PCB with LiFePO4 backup keeps each node and its cameras alive through mains dips and outages.

Connectivity & Power

The RC-CDM-700 is a grid-powered product intended for venues and urban infrastructure with mains electricity — stadiums, stations, malls, plazas, mosques and exhibition centres — so it is not fitted with solar panels. Each node accepts AC 100–240 V and is protected by an integrated UPS with LiFePO4 backup for 2–4 hours of continued operation and graceful shutdown during outages. Cameras and edge equipment are powered locally over PoE++ (IEEE 802.3bt). Backhaul is flexible: fibre or Gigabit Ethernet for fixed venues, with 4G/5G and Wi-Fi as alternatives or redundancy; NB-IoT/LoRa are available for low-bandwidth status telemetry from outlying nodes. Time synchronisation via NTP/PTP keeps multi-node events correlated across a large site.

Protection & Reliability

Outdoor sensing heads and enclosures are rated IP66 with an IK08+ vandal-resistant housing option for public areas; indoor concourse variants are available. The system operates from −30 °C to +60 °C, tolerates 0–95 % RH, and is specified for salt-fog, dust and high-wind exposure so it suits coastal, desert and tropical deployments alike. Metalwork uses hot-dip-galvanised corrosion protection finished with smooth powder-coat or fluorocarbon topcoat. Redundant power, watchdog-supervised edge compute, local rule execution and store-and-forward buffering ensure alerting survives network loss. Design service life is 8–10 years for electronics with a standard warranty and extended options.

Application Scenarios

• Stadiums & arenas: monitor concourses, vomitories, stairwells and exit routes during ingress/egress; hold gates and reroute spectators before pinch points reach critical density.
• Transport interchanges: platforms, ticket halls and interchange corridors in metro, rail and bus terminals; slow inflow with automated PA and signage when platforms approach LOS E/F.
• Religious & pilgrimage sites: manage the extreme, rhythmic crowd surges of mass gatherings and processions, with density heat-maps guiding stewards and reserve-route activation.
• Festivals, parades & public squares: temporary or permanent coverage of dense open areas, stages and bottlenecks where compression builds quickly.
• Exhibition & convention centres: track hall occupancy against fire-code limits and steer visitor flow between entrances and popular stands.
• Places of worship, markets & tourist attractions: continuous occupancy assurance and early warning for narrow lanes, gates and viewing points.

Case-style Examples

Stadium concourse retrofit. A multi-tier arena needed objective ingress control after near-miss crushes at its main gates. Panoramic AI cameras and thermal imagers were mounted over four concourse throats, calibrated to a site plan, with warning thresholds at 3 persons/m² and critical at 4. During egress the system now automatically triggers hold messages on PA and gate indicators when build-up rate signals a zone will hit critical within 90 seconds, smoothing outflow and eliminating dangerous back-pressure.

Transport hub platform safety. A busy interchange fitted RC-CDM-700 nodes over island platforms and the stair landings feeding them. When density on a landing climbs toward LOS E, the system dims platform inflow via concourse guidance signs and voice announcements, and flags the control room with a live heat-map — letting operators dispatch extra services and marshal staff before the platform saturates.

Mass-gathering pilgrimage route. For a seasonal high-density procession corridor, a chain of pole-mounted nodes with radar-assisted counting delivered continuous density mapping across a kilometre of route in bright glare and dust. Reserve-lane opening and one-way flow enforcement were triggered from objective LOS data rather than steward guesswork, giving the command centre minutes of lead time on emerging bottlenecks.

Customization & Selection Guide

• Sensor mix: camera-only for well-lit indoor concourses (lowest cost); add thermal for night/glare-critical outdoor areas; add mmWave radar for smoke/dust/extreme-packing corridors and redundancy. REDCOAST.LTD tunes the mix per zone.
• Coverage & node count: sized from ceiling/mounting height, area geometry and required density resolution — a single node covers up to ~1,500–2,500 m² of open area depending on optics; corridors and stairs use dedicated tight-angle nodes.
• Compute tier: choose 40 / 100 / 275 TOPS edge modules by camera count and model complexity; central server aggregation for very large multi-site estates.
• Interlocks: specify how many PA zones, signage groups and gate/turnstile outputs each node must drive; add SCADA/BMS integration as needed.
• Housing: standard outdoor IP66, vandal-resistant IK10, or discreet indoor architectural finishes.
• Software: on-prem, private-cloud or REDCOAST.LTD-hosted platform, with role-based dashboards, mobile app and reporting.

Deployment & After-sales

Deployment covers site survey and crowd-risk zoning, mounting design (poles, brackets, ceiling mounts), camera/radar calibration and homography mapping, threshold configuration to venue operating procedures, and integration testing with existing PA/CCTV/command systems. Nodes are pre-configured and factory-tested to shorten on-site commissioning. REDCOAST.LTD provides operator training, remote diagnostics, firmware/model updates, spare-parts support and SLA-based maintenance. Because the hardware is developed in-house, boards, interfaces and firmware can be adapted to project-specific sensors, protocols and control logic.

Standards & Compliance

Engineered toward CE, RoHS and REACH; enclosures to IEC 60529 IP66 and IEC 62262 IK impact ratings; EMC to EN/IEC 61000 and radar emissions to ETSI EN 302 264 (77 GHz). Video interoperability via ONVIF Profile S/T. Crowd-safety methodology aligns with Fruin Level of Service and recognised crowd-management guidance (e.g. the UK Green Guide / Purple Guide principles and ISO 22341 security-by-design). Data handling supports privacy-by-design and GDPR-style anonymised counting. Final certification scope is confirmed per project and destination market.

Why REDCOAST.LTD

REDCOAST.LTD delivers the complete solution — sensing hardware, edge AI, management platform and mobile app — integrated and supported by one team. Our differentiator is genuine in-house hardware development: we design and fabricate the PoE++ camera interface, edge AI inference, thermal/IR interface, I/O interlock and UPS power-management PCBs ourselves, so the system can be tailored to your venue's sensors, protocols, interlocks and control-room stack rather than forced onto off-the-shelf boxes. That control means better fusion accuracy, cleaner integration and a system that evolves with your operation.

Talk to REDCOAST.LTD about a crowd-safety assessment and a custom RC-CDM-700 configuration for your venue.