No Satellite Signal
GNSS is unavailable inside tunnels, culverts, boilers and mines, requiring continuous reliable position and attitude estimates.
INDOOR · GPS-DENIED AUTONOMOUS INSPECTION
Confined-space Drone Inspection Solution
Autonomous Positioning, Planning and Inspection without Satellite Signals
For metro tunnels, river culverts, industrial boilers, mines and enclosed warehouses with no GNSS, low light or constrained space, M3 / M4 drones equipped with INES and purpose-built I5 / I7 indoor drones work with mission software to connect mapping, planning, flight, capture, analysis and delivery.
LASER SLAMMISSION PLANNINGAUTONOMOUS FLIGHTAI INSPECTION
Turn Hard-to-access Spaces into Plannable Inspection Sites
The challenge is not merely flight, but maintaining positioning without GNSS, capturing consistently along planned routes and turning field data into reviewable results.
Complete DeliveryM3 / M4 drones with INES onboard navigation, or purpose-built I5 / I7 indoor drones, plus AGS ground station and ARP route planning; AI analytics and result platform configured by project
Four Key Constraints in Confined-space Operations
Long, Narrow and Complex Structures
Pipes, brackets, bends and narrow passages coexist, leaving little flight space and making route and safety-boundary control harder.
Low Light & Environmental Interference
Darkness, dust, reflections and repetitive textures hinder human observation and make stable capture and recognition more difficult.
Personnel-entry Risk
Elevated, waterside, hazardous-gas or unknown spaces are unsuitable for prolonged personnel entry and require lengthy preparation for traditional work.
One Autonomous Capability Set for Multiple Complex Spaces
Configure the flight platform, sensing payload and software workflow around the space, environment and mission instead of applying one fixed setup everywhere.
Metro & Railway Tunnels
Perform corridor patrol, equipment-state capture, point-of-interest photography and emergency investigation along preset routes.
Personnel intrusion / Forgotten tools / Water leakage / SpallingCulverts & Underground Utility Tunnels
Capture imagery deep within narrow corridors to inspect standing water, blockages and visible structural anomalies.
Standing water / Blockage / Spalling / Exposed reinforcementBoilers & Industrial Plants
Use protective structures, supplemental lighting and close-range flight to reduce scaffolding and high-risk personnel entry.
Coking / Deposits / Corrosion / Refractory lossMines & Unknown Spaces
Autonomously explore branching spaces with limited communications, retrace the route and optionally collect environmental data.
Spatial exploration / Collapse investigation / Personnel searchEnclosed Warehouses
Plan routes between racks from a prebuilt map, with optional vision, QR-code or RFID mission payloads.
Location capture / Inventory / Anomaly review
GPS-DENIED FLIGHT
Maintain Position and Attitude Deep inside Tunnels
LiDAR scans the environment into a point cloud. Onboard computing fuses inertial and environmental data for positioning and controls flight from the map, mission route and safety constraints.
- Positioning and mapping without satellite signals
- Corridor cruise and point-of-interest capture
- Automatic return after mission completion or trigger conditions
- Manual monitoring and safety takeover when needed
Complete Chain from Onboard Perception to Result Platform
M3 and M4 can carry the INES onboard navigation module for confined-space inspection, while the purpose-built I5 and I7 indoor drones address tight spaces and long-endurance, large-space missions respectively. The platform is selected for the site boundary and connected with planning, monitoring, capture and result management.
M3 / M4 + INES and I5 / I7 Indoor Drones
Select the aircraft by spatial scale and mission requirements: M3 / M4 carry INES for positioning, navigation and mission execution, while I5 / I7 address confined spaces of different scales.
Positioning, Perception & Onboard Computing
Fuse LiDAR, IMU and environmental data for real-time position and attitude estimation and autonomous control.
Drone Ground Station
Handles device connection, map creation, mission management, flight monitoring, video viewing and safety takeover.
Route Planning Software
Design routes, points of interest, speed and capture actions on a 3D point-cloud map to create reusable missions.
Analytics & Result Platform
Connect images, trajectories and AI results by project, supporting anomaly review, result retention and reporting.
05 · AGS GROUND STATION
Bring Missions, Status and Live Views into One Workspace
Confined-space AGS supports field execution by receiving planned missions and presenting aircraft position, attitude, device status and live video in one view, helping operators track progress while retaining essential manual intervention.
- Mission Import and Project Management
- Position, Attitude and Device-status Monitoring
- Live Video and Capture-process Viewing
- Manual Takeover and Safety Intervention
06 · ARP ROUTE PLANNING
Plan Reviewable, Reusable Inspection Missions in 3D Point Clouds
Confined-space ARP uses the site point cloud as the mission workspace to review spatial relationships before flight, organize waypoints, viewpoints and capture actions, and check routes against the environment to produce adjustable, reviewable mission files.
- Point-cloud Viewing and Local Sectioning
- Waypoint, Viewpoint and Capture-action Configuration
- Preflight Route and Spatial Review
- Mission-file Output for Field Execution
Positioning, Planning, Control and Recognition Form a Closed Loop
LiDAR SLAM Positioning
Scan confined spaces in real time and match the map to continuously estimate drone position and attitude without satellite signals.
Autonomous Navigation & Route Control
Turn maps, routes, points of interest and safety constraints into executable flight missions with waypoint hover and automatic return.
Layered Safety Protection
Reduce flight risk through environmental perception, obstacle-avoidance strategies, low-battery or mission-threshold return and physical protection.
Multimodal Inspection Capture
Configure high-resolution visible-light cameras, supplemental lighting, thermal imaging or other payloads for video, photo and environmental data.
AI-assisted Anomaly Detection
Configure project-specific models for cracks, water leakage, spalling, corrosion and other targets, outputting suspected anomalies for manual review.
Turn One Field Flight into a Reusable Mission
From initial mapping to routine reflights, mission maps, routes, points of interest and capture actions can be reused, reducing replanning cost.
Site Survey & Mapping
Confirm corridor structure, takeoff/landing points, lighting, communications and safety boundaries, then build a 3D map.
Plan the Inspection Mission
Configure routes, points of interest, flight parameters and capture actions in ARP to create a standardized mission template.
Autonomous Flight & Capture
The drone executes the mission while AGS displays position, status and live views for corridor or waypoint capture.
Anomaly Detection & Review
Associate images and video with position, detect suspected anomalies and have domain personnel review them.
Result Retention & Reuse
Save missions, trajectories and results for future reflights, historical comparison and reporting.
09 · DIGITAL DELIVERY
Connect Flight, Recognition and Reporting
The ground station and result platform connect mission status, live video, anomaly detection and archiving into one inspection view for field teams and management.
Visible Flight Process
View routes, position, device status and live video together.
Anomaly-location Association
Relate suspected anomalies to mission time, trajectory position and field imagery.
Inspection-result Retention
Archive images, video, anomaly records and review status by mission.
Standard Report Output
Organize inspection scope, findings and image evidence using project templates.
Autonomous Flight Practice in Metro Tunnels
Field material shows drone cruise, altitude holding and close-range capture in curved tunnels with complex pipelines and overhead-contact equipment.
Page parameters and configurations describe capabilities. Actual range, endurance, payload, communications and recognition depend on platform, environment and acceptance conditions.
CONFIGURE FOR YOUR SPACE
Contact a Solution Specialist ↗Configure Operations from Spatial Structure and Inspection Objectives
Provide site survey, equipment selection, map and route preparation, system integration, mission validation and personnel training.