In-tunnel Bluetooth beacon positioning + WiFi data transmission, out-of-tunnel GPS + 4G automatic relay—one tunnel, two networks, seamless in/out switching, personnel and vehicles always on the map.
Satellite signals are blocked by the mountain, public network signals can’t get in, the tunnel becomes a regulatory “black hole”
Thick mountain cover means satellite signals cannot penetrate at all; traditional GPS trackers go “blind” upon entering the tunnel.
Deep in the tunnel there is no public network coverage; 4G positioning devices cannot send data out, breaking the position information chain.
Muck cars, muck-removal vehicles and personnel work crossing in narrow spaces; unclear positions easily cause collisions.
When emergencies like collapses and water inrushes occur, the number, positions and distribution of people in the tunnel cannot be quickly grasped.
Same positioning device, two working modes, fully automatic in/out of tunnel, zero operation for personnel
After entering the tunnel GPS disappears, the device automatically switches toBluetooth beacon positioning: scans the Bluetooth beacons deployed along the tunnel to resolve position, data via the in-tunnelWiFi networkbackhauled level by level.
Driving/walking out of the tunnel, satellite signal recovers, the deviceautomatically switches back to GPS/BeiDou positioning, data via4G public networkdirectly to cloud platform, seamless track continuity.
In-tunnel network and out-of-tunnel public network converge on the platform side, personnel and vehicles always on the map
Deployed extending with tunnel excavation, simple construction, not dependent on public network
Bluetooth beacon wall-mounted/attached to tunnel side wall or arch, moves forward synchronously with the excavation face, position is the number
WiFi AP wall-deployed, chained coverage of the whole tunnel, extending with progress
AP aggregated via fiber (or using temporary construction communication cable) to tunnel-port room, stable and anti-interference
Tunnel port is the natural boundary between GPS/4G and beacon/WiFi, device auto-switches in/out of tunnel
Personnel wear hat cards, construction small flat cars magnetically fix the positioning device, network on power-on
On tunnel entry auto-switches to Bluetooth beacon positioning, resolves the section by beacon number
Position data transmitted via tunnel WiFi AP and fiber ring network to tunnel-port room
Auto restore GPS/BeiDou + 4G on exiting, seamless track continuation
In-tunnel section + out-of-tunnel precise position unified into one map, real-time count of people and vehicles
Two positioning devices on same platform, same account system, personnel and vehicles managed on one map
In-tunnel section positions and out-of-tunnel precise positions presented uniformly, personnel and vehicles marked in colors
Real-time count of current in-tunnel personnel and vehicle numbers and distribution sections, emergency baseline checkable anytime
Hazard sections (blasting zone, water inrush section, muck car work zone) delineated, intrusion immediate alarm
Hat card one-touch SOS reports position, emergencies guide evacuation and roll call by section
In/out tunnel moments automatically recorded, in-tunnel duration automatically counted, attendance evidence-based
Personnel and vehicle history track replay, accident analysis and accountability traceable
| Alarm Type | Trigger Condition | Level | Disposition Action |
|---|---|---|---|
| SOS Help | Hat card SOS button triggered | Emergency | Platform popup + SMS/phone push to management end, with position section |
| Hazard Zone Intrusion | Entering blasting zone/water inrush section fence | Emergency | Immediate alarm and linkage with on-site broadcast/attendant intervention |
| In-Tunnel Overcrowding | Number of people in a section exceeds the limit | Important | Prompt diversion, prevent muck car/cross-operation crowding risk |
| Timeout Not Out of Tunnel | Entered tunnel but not out past timeout (configurable by shift) | Important | Verify whether lingering, start check on abnormality |
| Vehicle Over-speed | In-tunnel over-speed threshold triggered | Important | Alarm push to fleet management, violation records archived |
| Abnormal Stillness | Personnel position unchanged for a long time | Important | Attendant verifies by phone, on-site check if necessary |
| Device Offline | Positioning device no data past timeout | Notice | Troubleshoot device fault or network loss, prevent “false online” |
| Low Battery | Battery level below threshold | Notice | Remind to charge/replace, ensure full-shift online |
GPS/4G and beacon/WiFi dual-mode automatic relay, track continuous throughout with no breakpoints
Not dependent on public network and satellite, positions and transmits even with thickest mountain
Hat card + magnetic vehicle positioning device on same platform, mixed personnel/vehicle risk visible and controllable
Hat card directly fixed on hard hat, vehicle strong magnet sticks and goes, flexibly migrates with excavation face
In-tunnel personnel count and section distribution fully visible on one screen, winning golden time for emergency decisions
Beacons and APs move forward synchronously with tunnel excavation, one-time planning, continuous coverage
Full-process positioning of in/out personnel and vehicles, overcrowding and timeout control
Underground personnel and vehicle positioning, emergency evacuation roll call
O&M inspection personnel position and area control
Work vehicles and personnel underground space position management
Manager Zhang: +86 13905140243
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Support: support@ruichuangte.com
