Quality Laser Inertial Navigation System & Fiber Optic Inertial Navigation System Factory

When land platforms operate in complex terrain, urban canyons, or GNSS-challenged environments, navigation accuracy is critical. The Dubhe-L1 Land INS / IMU is engineered to provide reliable, high-precision positioning, attitude, and heading information—anytime, anywhere. Powered by advanced Ring Laser Gyroscope (RLG) and Fiber Optic Gyroscope (FOG) technology, paired with precision quartz accelerometers, the Dubhe-L1 combines: Fast adaptive alignment for rapid mission readiness Intelligent sensor fusion for stable, continuous navigation Zero-velocity updates to reduce drift during long missions or GNSS interruptions Its rugged, compact design delivers consistent performance under extreme temperatures, shock, and vibration, making it ideal for: Armored vehicles and military ground platforms Autonomous land vehicles (UGV/AGV) High-speed rail and logistics vehicles Precision agriculture and industrial vehicles Key Advantages: Accurate and stable navigation in GNSS-denied environments Seamless integration with GNSS, odometer, and auxiliary sensors Low power consumption with long-term reliability Designed for harsh terrain and continuous operation The Dubhe-L1 Land INS delivers high-performance inertial navigation, giving operators confidence to move, navigate, and make mission-critical decisions without compromise.

The Maritime FOG INS is a rugged, strapdown inertial navigation system (INS) designed for the most demanding maritime and naval environments. Utilizing fiber-optic gyroscopes (FOG) or ring laser gyroscopes (RLG) combined with high-precision quartz accelerometers, the system provides continuous, real-time navigation gyro outputs with unmatched accuracy in heading, roll, pitch, speed, and position—even in GNSS-denied or GPS-compromised scenarios. Operational Modes & Features Autonomous inertial navigation for GPS-denied missions INS/GNSS integrated navigation using advanced Kalman filter algorithms Velocity-augmented navigation for dynamic marine maneuvers Attitude Heading Reference System (AHRS) capabilities High-speed real-time navigation processing for shipboard, USV, AUV, and offshore platforms Key Advantages Reliable maritime INS performance under harsh conditions (shock, vibration, temperature extremes) High-precision fiber gyroscope and laser inertial navigation system accuracy Quick alignment and startup for mission-critical operations Flexible integration into existing inertial measurement systems and inertial navigation units Supports both commercial maritime and defense naval applications Applications Shipboard navigation & gyrocompass replacement Tactical maritime guidance and platform stabilization Autonomous marine vehicles (USVs, AUVs) Offshore and research vessels Defense and naval operations requiring high-accuracy inertial guidance systems

Modern UAVs, drones, and aircraft demand reliable navigation, even in GPS-denied or challenging environments. Our RS422 FOG INS Small delivers continuous, high-accuracy position, velocity, and attitude data, making it ideal for mission-critical airborne platforms. Key Features & Advantages High-precision Fiber Optic Gyroscopes (FOG/RLG) and quartz accelerometers for accurate inertial navigation Advanced sensor fusion algorithms for stable and reliable navigation in dynamic conditions Mission-adaptive alignment methods and multi-source navigation enhancement Reliable alignment in complex operational environments Compact design optimized for SWaP (Size, Weight, and Power) requirements RS422 interface for seamless integration with existing avionics and flight control systems Applications UAV and drone navigation in GPS-degraded or denied areas Autonomous airborne platforms requiring precise inertial positioning Aircraft guidance and control systems Integration with flight control and avionics systems Our commercial RS422 FOG INS Small provides high-accuracy inertial navigation, ensuring your UAV, drone, or aircraft maintains reliable position, velocity, and attitude data, even without GPS.

Accurate and stable heading information is the foundation for safe navigation and effective mission execution in modern offshore patrol operations. The Marine Gyrocompass provides reliable true heading data, delivering safe and efficient navigation support for Offshore Patrol Vessels (OPVs), law enforcement ships, and maritime service fleets. 1. Application Background Coastal patrol vessels and offshore enforcement ships often operate in complex maritime environments, performing tasks such as patrolling, law enforcement, search and rescue (SAR), and maritime monitoring. Traditional magnetic compasses can be affected by magnetic deviation, electromagnetic interference, or high-latitude magnetic anomalies, leading to navigation errors and operational risks. By using a Marine Gyrocompass, vessels gain: Precise heading reference Route navigation and autopilot support Seamless integration with radar and communication systems Stable operation under all weather and sea conditions This ensures safer, more efficient operations for civil maritime tasks. 2. Typical Applications a. Navigation and Autopilot The Gyrocompass provides true heading data that can be directly connected to the vessel’s autopilot and electronic chart display and information system (ECDIS), enabling: Stable course tracking Automated turning and cruise control Long-distance route maintenance Even in rough seas or complex coastal waters, this reduces crew workload and improves navigation safety. b. Radar and Communication Integration Heading data supports vessel systems such as: Radar target positioning and tracking Optical/infrared (EO/IR) sensor pointing Antenna and satellite communication alignment This ensures efficient coordination for patrol, surveillance, and search & rescue operations. c. Patrol and Search & Rescue Operations In low-speed maneuvers or rough sea conditions, the Gyrocompass maintains heading stability, helping crew to: Maintain precise search patterns Improve target detection efficiency Ensure coordinated patrol routes and consistent track lines 3. System Advantages True North Heading — unaffected by magnetic deviation or onboard equipment interference High Sea Condition Adaptability — stable performance in rough seas Easy Integration — compatible with ECDIS, radar, AIS, autopilot, and satellite communication systems Fast Startup & Low Maintenance — operational in minutes, long-term reliable performance Compact Design — suitable for installation and retrofit on various vessel types 4. Industry Feedback Typical industry feedback shows that after adopting Marine Gyrocompass: Vessels maintain stable heading even at low speeds or in rough seas Radar and EO/IR targeting accuracy improves Patrol and SAR mission efficiency increases Crew workload is reduced 5. Typical Use Cases Coastal patrol and Exclusive Economic Zone (EEZ) monitoring Fisheries management and resource protection Anti-smuggling and maritime law enforcement Search & Rescue (SAR) operations Port and waterway security Offshore infrastructure inspection and protection Fleet coordination and management 6. Civil Maritime Value In civil maritime operations, Marine Gyrocompass provides: Safety and Reliability — stable heading baseline for navigation Ease of Operation — supports autopilot and navigation systems All-Weather Performance — reliable under various sea conditions Low Maintenance Costs — long-life design reduces operating expenses System Compatibility — seamless integration with new or existing vessel bridge systems This industry example demonstrates how the Marine Gyrocompass supports civil offshore patrol and enforcement vessels, improving navigation safety and operational efficiency.

In modern railway maintenance, precise track geometry inspection is essential for ensuring ride comfort, operational safety, and long-term track integrity. As railway inspection technology evolves towards digital and automated systems, Inertial Navigation Systems (INS) have become a vital component of many track inspection platforms. What Is an INS and How Does It Work in Railway Inspection? An Inertial Navigation System (INS) is designed to capture the motion and attitude of track inspection equipment during operation. It continuously measures parameters such as: Roll Pitch Heading These measurements are directly related to track curvature, superelevation, and transition geometry, providing essential data for geometric analysis. In simple terms, INS tells the system “what the equipment is doing and in which orientation”, helping inspectors understand track behavior in real time. Why Is INS Important for Railway Track Inspection? Railway lines often include challenging environments such as: Tunnels Urban corridors Multi-bridge sections In these areas, GNSS signals may be weak or unavailable. Unlike GNSS, INS does not rely on external signals and can continuously output attitude data, ensuring uninterrupted inspection even in signal-denied areas. Additionally, INS systems offer high sampling rates, making them suitable for fast-moving inspection vehicles, enabling precise tracking of track geometry at high speeds. Can INS Perform Track Inspection Independently? The short answer is no. While INS provides essential attitude and motion data, it cannot independently measure all railway geometric parameters such as: Track gauge Alignment Level and twist Absolute coordinates Modern railway track inspection systems rely on multi-sensor data fusion, combining: INS for attitude GNSS for position Laser and optical sensors for geometric measurements Wheel odometry or speed inputs This combination ensures accurate, reliable, and standards-compliant track geometry results. Where Is INS Used in Railway Inspection? INS modules are commonly integrated into: Track inspection vehicles Hand-pushed inspection platforms Portable inspection systems They provide critical functions such as: Curve and direction analysis Transition zone monitoring Vehicle attitude compensation Continuous data recording INS ensures that track inspections remain continuous and reliable, even in complex or signal-limited environments. Summary: INS in Railway Track Inspection In summary, INS plays a supporting but critical role in railway track inspection. It provides attitude data and ensures continuous measurement, working in conjunction with GNSS, laser, and optical systems. While not a standalone solution, INS is an essential part of modern railway track inspection technology, enabling safer, more accurate, and more efficient track monitoring.

In railway line surveying or vehicle-mounted LiDAR scanning projects, vehicles often travel at higher speeds through complex and changing environments: tunnels, elevated bridges, dense forests, or urban high-rises. These spots can easily weaken or completely block satellite signals (GNSS), causing standalone GNSS positioning to "jump" or drift. This leads to distorted 3D point clouds and inaccurate track parameters. That's where INS (Inertial Navigation System) and its core component IMU (Inertial Measurement Unit) step in as the key helper. Think of the IMU as the vehicle's built-in "gyroscope + accelerometer"—it measures acceleration and rotation hundreds of times per second (typically 200–1000 Hz). Even if GNSS signals drop out for seconds or longer, the IMU uses its "inertial memory" to keep estimating position and orientation. The Golden Combination: GNSS + IMU (Super Simple Version) GNSS: Like a "global GPS eye," it delivers centimeter-level absolute position—but it gets blocked easily. IMU: Like your inner ear's balance sense, it records every shake and turn at high frequency. When signals vanish, it "guesses" the next move based on physics. Fusion (usually via algorithms like Kalman filtering): GNSS regularly corrects the IMU's small accumulated errors, while the IMU fills in the blanks during signal blind spots. The result? GNSS handles long-term stability, IMU bridges short-term gaps—creating a continuous, reliable trajectory that pins LiDAR point clouds exactly where they belong, preventing blur or misalignment. Real-World Application Scenarios in Railway Surveying High-Speed / Conventional Rail Track Geometry and Deformation Monitoring Inspection vehicles run at 80–120 km/h along the tracks, with multi-line LiDAR scanning rails, catenary wires, etc. INS/IMU + GNSS outputs real-time position, velocity, and attitude (heading, pitch, roll) at over 200 Hz. LiDAR captures millions of points per second, projecting them accurately onto map coordinates using the precise trajectory. Even crossing several kilometers of tunnels, point clouds connect seamlessly in most cases. Industry typical performance: In longer tunnel sections, high-end systems control drift to sub-meter or better levels, enabling millimeter-grade analysis of track parameters (gauge, superelevation, defects). Metro / Tram Tunnel Full-Line Modeling Tunnels have zero GNSS signals; traditional methods rely on odometers or manual markers—low efficiency, big errors. Start with GNSS + IMU initialization in open sections for a high-accuracy starting point. Inside the tunnel, IMU takes over to maintain continuous trajectory. LiDAR scans tunnel walls, tracks, cables to build complete 3D models. Real results: Full-run point clouds often achieve overall accuracy better than 5–10 cm, with deformation monitoring reaching millimeter level—greatly shortening shutdown windows and cutting labor costs. Freight Rail Line Patrol and Intrusion Detection Remote lines with heavy vegetation often block GNSS under tree canopies. IMU delivers high-dynamic attitude, smoothing trajectories even during train sway. Fused trajectory removes LiDAR motion blur, making distant poles, slopes sharp and clear. Outcome: Reliable detection of intrusions, slope collapse risks, enabling proactive maintenance alerts. Why a Reliable INS Product Matters So Much Strong Bridging Capability: Handles extended GNSS outages stably (performance varies by IMU grade—fiber-optic or high-end MEMS excel in longer tunnels). High-Frequency Output: Matches LiDAR scanning perfectly for superior point cloud quality. Easy Integration: Standard interfaces (serial/Ethernet/time sync) fit mainstream LiDAR and survey vehicles. Rail-Grade Reliability: Vibration-resistant, temperature-stable for long-term field use. In short: In railway LiDAR mapping, unstable positioning = wasted data. A solid INS/IMU + GNSS setup turns your project from "barely usable" to "efficient, precise, and tunnel-proof." If you're working on high-speed rail track surveys, metro tunnel modeling, or line patrols, feel free to comment or reach out! Share your specifics (tunnel lengths, speed needs, budget), and we'll recommend the best-matching INS solution.

OverviewAn aging seabed cleaning vessel faced a completely failed navigation system, leaving its hydrographic computer, ship control system, and charting system unable to receive accurate positioning or heading data. This caused operational delays and increased safety risks. Customer Challenge Replace the vessel’s fully failed gyro navigation system Ensure seamless compatibility with existing hydrographic measurement and ship control systems Provide real-time, high-precision navigation and heading data Include installation, calibration, and on-site operator training Urgent delivery to minimize downtime Our SolutionWe deployed a high-precision fiber optic gyro (FOG) navigation system integrated with a GPS module. Key features included: Plug-and-play setup: Quick installation with automatic calibration for minimal downtime System compatibility: Fully compatible with existing control and hydrographic measurement equipment High precision and stability: Accurate heading and positioning, stable even at high speed and in harsh marine conditions On-site training: Hands-on training for operators on system usage, calibration, and basic maintenance Reliable logistics: Coordinated with the customer’s freight partner for safe and timely delivery of the system and spare parts Results Restored vessel capability: Stable and precise navigation enables efficient seabed cleaning operations Accurate real-time data: High-precision outputs to hydrographic and charting systems Reduced operational risk: Quick setup, automatic calibration, and training minimized downtime Technical Highlights Three-axis high-precision fiber optic gyro Integrated GPS for enhanced positioning accuracy Automatic calibration for plug-and-play installation Fully compatible with existing marine measurement and control systems Reliable performance in high-speed, high-shock, and harsh marine environments ConclusionThis project demonstrates our expertise in providing turnkey, high-precision navigation solutions for older marine vessels. By combining FOG technology with GPS, offering on-site training, and ensuring rapid deployment, we helped the customer quickly restore operational capability and achieve precise, efficient seabed cleaning operations.

In today's naval operations, precise and dependable navigation is essential for mission success, particularly for Offshore Patrol Vessels (OPVs). These vessels frequently undertake extended patrols, surveillance, and rapid response missions in challenging maritime environments. Our naval-grade fiber optic gyrocompass is specifically engineered to meet these demands, delivering stable heading references and attitude information using advanced fiber optic technology — ensuring outstanding performance under the most demanding conditions. Key Advantages Naval-Grade Ruggedness — Designed for harsh shipboard environments, it withstands vibration, shock, and onboard electromagnetic interference, providing consistent operation on combat-equipped vessels. Advanced Fiber Optic Technology — Leveraging precise optical principles, it delivers accurate heading data with minimal drift, enabling seamless integration with weapon systems for enhanced combat effectiveness. Independent Inertial Navigation — Maintains reliable positioning and attitude awareness even when external signals are unavailable or disrupted, supporting continued situational awareness. Flexible Integration — Modular design allows straightforward connection to existing navigation and combat management systems, suitable for a wide range of vessel types and sizes. Typical Applications Our fiber optic gyrocompass supports the core missions of offshore patrol vessels, including: Precise Vessel Navigation — Offers continuous, dependable heading references for safe maneuvering at high speeds and in rough seas. Weapon System Support — Serves as a stable reference for fire control and weapon platforms, ensuring accurate targeting despite vessel motion. Enhanced Situational Awareness in Complex Environments — Boosts autonomous navigation capabilities during electronic interference or dynamic sea conditions, improving mission safety and efficiency. Backed by proven expertise and extensive naval deployments, our fiber optic gyrocompass stands as a trusted solution in modern maritime navigation. If you are interested in our capabilities, please contact us for further details or to discuss technical requirements.

In the fields of modern ocean exploration, scientific research, and industrial underwater operations, precise attitude control and reliable navigation capabilities are key elements ensuring the success of Remotely Operated Vehicles (ROV). The Fiber Optic Gyroscope (FOG), with its outstanding high precision, low drift characteristics, and excellent environmental adaptability, provides robust inertial measurement support for ROVs and has become a core technology in underwater navigation systems. Core Advantages High Precision and Low Drift: Based on the Sagnac effect, FOG achieves extremely low bias instability, maintaining stable angular velocity measurements even during long-duration operations or in complex underwater environments—significantly outperforming traditional mechanical or MEMS sensors. Real-Time Attitude Monitoring: Provides accurate pitch, roll, and yaw angle data, enabling precise attitude adjustment and stable control of ROVs in dynamic currents. Compact and Durable Design: All-solid-state structure with no moving parts, resistant to vibration, shock, and pressure changes; long lifespan and low maintenance costs—perfectly suited for harsh deep-sea environments with high pressure and intense vibrations. Flexible Integration Capability: Easily integrates with ROV control systems, inertial navigation algorithms, depth sensors, Doppler Velocity Logs (DVL), and others to form high-performance Inertial Navigation Systems (INS), further enhancing overall positioning accuracy. Application Value Attitude Stability Control: Ensures stable ROV operation under complex currents or operational disturbances, preventing loss of control and enhancing operational safety. Inertial Navigation Support: Provides continuous position and orientation tracking in deep-water areas where GNSS signals are unavailable, suitable for long-duration exploration and pipeline inspections. Improved Task Efficiency and Safety: Significantly enhances the precision and reliability of marine scientific research, resource exploration, and subsea infrastructure maintenance, reducing risks and optimizing operation time. Current mainstream FOG systems support efficient static gyro compassing, achieving high-precision heading alignment. For heading requirements in high-speed motion or dynamic environments, advanced algorithm integration or fusion with auxiliary sensors can further meet the demands of complex ROV missions. The Fiber Optic Gyroscope (FOG) serves as a core technology for modern ROV attitude control and navigation. With its high precision, exceptional reliability, and seamless integration features, it significantly improves the stability and efficiency of underwater operations, providing strong technical assurance for marine scientific research, resource development, and industrial applications.

In complex electromagnetic environments, conventional GNSS-based navigation systems are increasingly vulnerable to signal degradation, intermittent loss, or complete denial. Intentional or unintentional interference, jamming, and multipath effects can severely impact positioning and attitude accuracy. To address these challenges, integrated anti-jamming GNSS/INS navigation systems have become a critical engineering solution, enabling continuous and reliable navigation and attitude outputs even under harsh interference conditions. 1. Application Background In high-interference operational scenarios, navigation systems are typically required to continuously provide: Position Velocity Attitude information (Roll, Pitch, Heading) These systems are often deployed on mobile platforms such as UAVs, autonomous vehicles, maritime platforms, and defense systems, where strict SWaP constraints (Size, Weight, and Power) apply. As a result, the navigation solution must not only be accurate, but also: Highly integrated Robust against interference Optimized for long-term reliability 2. Anti-Jamming as a System-Level Engineering Challenge From an engineering perspective, anti-jamming performance cannot be achieved by the RF front-end alone. While anti-jamming GNSS antennas play a vital role in spatial filtering and interference suppression, navigation continuity ultimately depends on system-level co-design, including: GNSS receiver architecture Inertial sensor performance Sensor fusion algorithms Coupling strategy between GNSS and INS A practical integrated anti-jamming navigation solution typically includes: Multi-channel anti-jamming GNSS receiver Anti-jamming antenna for front-end interference mitigation High-performance INS (gyroscopes and accelerometers) Tightly coupled or deeply coupled GNSS/INS architecture Only through coordinated system integration can stable navigation performance be maintained under severe interference. 3. Value of GNSS/INS Integration in Interference Environments When GNSS signals are degraded, blocked, or temporarily unavailable, the Inertial Navigation System (INS) provides short-term navigation continuity based on inertial measurements. Once GNSS signal quality recovers, GNSS observations are reintroduced into the navigation filter to correct inertial drift. Through multi-sensor fusion, an integrated GNSS/INS system can: Maintain continuity of the navigation solution Preserve stable and smooth attitude outputs Reduce the impact of GNSS outages and interference Significantly improve overall system robustness This complementary behavior makes GNSS/INS integration essential for high-reliability navigation applications. 4. Importance of Integrated System Design Modern navigation platforms face increasing pressure to balance performance with SWaP constraints. As a result, integrated anti-jamming navigation systems must achieve: High-level integration of antenna, GNSS receiver, and INS Optimized trade-offs between miniaturization, power consumption, and accuracy Coordinated optimization of anti-jamming capability and navigation performance Such systems are no longer simple assemblies of independent components. Instead, they represent application-driven, system-level engineering solutions designed to meet specific operational requirements. 5. Engineering Summary As operational electromagnetic environments continue to grow more complex, GNSS can no longer be treated as a standalone navigation source. Instead, it functions as one component within a deeply integrated GNSS/INS navigation architecture, where inertial sensing, anti-jamming techniques, and advanced sensor fusion algorithms work together. Integrated anti-jamming GNSS/INS navigation systems are emerging as a key technical approach for delivering reliable positioning, velocity, and attitude information in high-interference environments—supporting mission-critical applications across aerospace, defense, unmanned systems, and advanced industrial platforms.