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

Modern maritime operations demand high accuracy, reliability, and continuity—especially in rough seas, remote waters, and environments where GNSS signals may be limited, degraded, or unavailable. In such conditions, relying solely on GNSS is often insufficient. Signal blockage, multipath effects near coastlines and offshore structures, and occasional interference can all affect navigation performance. To ensure safe and stable vessel operation, an autonomous navigation reference is essential. A marine-grade Inertial Navigation System (INS) provides continuous navigation and attitude information without dependence on external signals. Even during GNSS degradation or outages, the INS maintains stable heading and motion outputs, supporting reliable navigation at sea. Our marine-grade strapdown INS is built with RLG/FOG optical gyroscopes and high-precision quartz accelerometers, delivering accurate real-time measurements of heading, roll, pitch, yaw, and vessel motion. Designed for harsh marine environments, the system supports long-term, continuous operation under vibration, temperature variation, and high humidity. The system supports pure inertial, GNSS-aided, and velocity-aided operation modes, allowing flexible integration with onboard sensors such as gyrocompasses, speed logs, and other marine navigation instruments. This multi-mode capability enhances navigation continuity and redundancy, particularly in coastal waters, narrow channels, and open-sea operations. Marine-grade INS technology is widely used across a range of maritime platforms, including dynamic positioning (DP) vessels, offshore platforms, survey ships, and unmanned surface vessels (USVs). In real-world applications, similar high-performance FOG and RLG-based INS systems have proven essential. For instance, in offshore DP operations, INS integrates with Doppler velocity logs to maintain precise station-keeping for supply vessels and drilling platforms, even in challenging North Sea conditions. On hydrographic survey ships, FOG INS combined with multibeam sonar ensures accurate seabed mapping during GNSS outages, as seen in deepwater surveys and remote oceanographic missions. Additionally, advanced INS enables autonomous navigation for USVs in pipeline inspections and port surveys, reducing personnel exposure while delivering continuous data in GNSS-denied areas like near offshore structures. By providing stable and reliable navigation and attitude data under all operating conditions, INS plays a key role in enabling safer, more efficient, and more dependable modern maritime operations.  

We are excited to announce that our Merak-M03, Merak-M05, and Merak-M1 maritime-grade inertial navigation systems (INS) have been successfully ordered and are now ready for shipment. Before delivery, our team conducted comprehensive pre-shipment inspections and photographed each unit to guarantee quality, traceability, and client confidence.

H1: Combining INS and LiDAR for High-Precision 3D Railway Mapping As railway networks move toward digital twin and intelligent maintenance systems, 3D track modeling is becoming the foundation for accurate structural analysis and predictive maintenance. The most reliable solution today integrates Inertial Navigation Systems (INS) with LiDAR. H2: The Role of INS and LiDAR in Railway Mapping H3: INS Provides High-Frequency Attitude Data INS outputs: roll pitch heading angular rate linear acceleration This prevents point cloud distortion caused by motion or vibration. H3: LiDAR Generates Dense 3D Point Cloud Data LiDAR captures: rail profile sleepers & fasteners ballast surfaces tunnels and platform geometry INS provides the “stability reference,” allowing the LiDAR point cloud to remain upright, aligned, and drift-free. H2: Why Fusion Is Necessary LiDAR alone cannot determine scanner orientation. Without INS: point clouds tilt curve sections distort stitching becomes inaccurate With INS fusion: consistent long-range scanning accurate curvature reconstruction stable mapping at high operational speeds fully usable, engineering-grade point clouds H2: Application Scenarios Railway inspection vehicles High-speed rail comprehensive inspection trains Track inspection robots Under-carriage scanning systems Digital twin modeling for metro & high-speed rail H2: Conclusion INS + LiDAR fusion has become the standard solution for precision 3D track reconstruction. By providing stable attitude references and dense point clouds, this combination supports intelligent maintenance and next-generation digital twin systems in the global railway industry.   Keywords: INS LiDAR fusion, 3D railway mapping, track reconstruction, LiDAR track inspection, inertial navigation LiDAR integration, railway digital twin

Modern railway maintenance is shifting toward lightweight, portable, and GNSS-independent inspection technologies. In environments such as tunnels, underground metro lines, or bridges, GNSS signals are unavailable—yet accurate structural health monitoring is still essential. This is where IMU/INS systems deliver exceptional value. How IMU/INS Detects Track Defects Without GNSS Even without external positioning data, an IMU can diagnose abnormalities in the track through motion dynamics, angular measurements, and temperature behavior. 1. Vibration Analysis (Acceleration Curves) Abnormal acceleration signatures allow detection of: Loose fasteners Ballast settlement Voids beneath concrete slabs Sleeper cracking or damage High-frequency vibration data is especially valuable for early-stage defect discovery, where visual inspection alone may fail. 2. Angular Rate Variations (Gyroscope Output) Gyroscope signals help identify structural or geometric issues, including: Gauge widening Rail wear Track misalignment or deformation Angular rate anomalies often appear before defects become visible, enabling predictive maintenance. 3. Temperature Drift as a Secondary Indicator Structural defects can alter stress distribution and heat conduction. This leads to small but measurable temperature drift in IMU sensors. Temperature data provides additional clues for: Slab voids Layer delamination Foundation instability Abnormal structural stress zones When combined with vibration and angular data, temperature behavior strengthens defect classification. Application Scenarios IMU/INS-based, GNSS-free monitoring is suitable for: Portable inspection trolleys Backpack-style or hand-pushed inspection tools Metro tunnel structural monitoring Autonomous rail inspection robots Soft-soil or weak foundation settlement detection These solutions enable low-cost, continuous, and intelligent monitoring even in challenging environments. Conclusion Even when used purely as an IMU, an INS provides a powerful dataset for diagnosing railway track defects. By combining vibration, angular rate, and temperature characteristics, IMU/INS-based systems deliver precise, GNSS-independent structural health monitoring. This makes them ideal for modern, digital, and intelligent railway maintenance and inspection systems.

Meta Description: Discover how IMU/INS technology enhances railway curve inspection by providing accurate roll, pitch, and heading data for high-speed rail safety and track geometry evaluation. Keywords: INS for railway, IMU track geometry, high-speed rail inspection, railway curve measurement, track attitude monitoring, inertial navigation system railway H1: Inertial Navigation in Railway Curve Inspection High-speed rail systems rely heavily on the geometric accuracy of track curves. As trains pass through curved sections at high speeds, even small deviations in track alignment can increase wheel–rail forces, reduce ride comfort, and compromise safety. Inertial Navigation Systems (INS) have become indispensable for evaluating these parameters with high precision. H2: Why INS Is Critical in Curve Geometry Analysis INS delivers continuous, high-frequency measurements of: Roll (left–right inclination, linked to superelevation) Pitch (vertical gradient and alignment changes) Heading (curve direction, radius, and transitions)   Angular rate & linear acceleration (curve entrance and exit dynamics) These parameters allow inspectors to verify whether a curve meets design specifications—including superelevation, transition length, and curvature consistency. Even in tunnels, viaducts, or dense urban areas where GNSS signals fail, INS continues providing reliable attitude data, ensuring uninterrupted measurement. H2: Application Scenarios H3: High-Speed Rail Track Geometry Inspection INS ensures precise curvature and super-elevation measurement under high vibration environments. H3: Turnout and Transition Section Monitoring Curve transition zones often accumulate stress; INS helps detect early geometric drift. H3: Portable Inspection Trolleys & Robots Compact INS modules enable lightweight, field-deployable inspection tools. H2: Conclusion INS serves as the “attitude reference” for all curve inspection platforms. With superior vibration resistance and GNSS-independent operation, INS ensures reliable, high-precision curve geometry evaluation for modern railway maintenance.  

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.

Applications of Inertial Navigation Systems (INS) in Oil & Gas Exploration Modern oil and gas extraction increasingly relies on precise positioning, accurate tool orientation, and continuous operational data—especially in deep underground or subsea environments where GPS signals cannot reach. Inertial Navigation Systems (INS) have become a core technology supporting advanced drilling, logging, and pipeline inspection. 1. What Is Inertial Navigation? An Inertial Navigation System (INS) uses gyroscopes and accelerometers to measure angular velocity and linear acceleration. By integrating these measurements, the system computes: Position Velocity Attitude (roll, pitch, yaw) Because it works without external signals, INS is ideal for harsh, enclosed, or GPS-denied environments such as downhole wells, deepwater drilling, and long-distance pipelines. 2. Key Applications in the Oil & Gas Industry  2.1 Directional Drilling & Trajectory Control INS provides continuous monitoring of the drilling tool’s orientation, including: Inclination Azimuth Toolface angle When integrated with Measurement While Drilling (MWD) systems, INS enables: Precise wellbore trajectory control Improved accuracy in horizontal, extended-reach, and multilateral wells Enhanced safety and reduced drilling errors 2.2 Logging & Formation Evaluation INS can be embedded in downhole logging tools to: Track tool movement and orientation during logging runs Correct measurement curves affected by tool motion Improve formation interpretation and geological modeling This leads to more reliable reservoir evaluation.  2.3 Deepwater Drilling & Subsea Operations In deepwater environments where GPS signals cannot penetrate: ROVs (Remotely Operated Vehicles) use INS for underwater navigation Drillships and subsea platforms depend on INS for position and attitude stabilization INS supports dynamic positioning and safe drilling operations INS provides continuous, stable, and accurate subsea navigation even under extreme challenges like currents, turbidity, and low visibility. ️ 2.4 Pipeline Inspection & Mapping Inside long oil and gas pipelines, inspection tools (PIGs) use INS to: Record the internal pipeline path Identify bends, curves, and deformation Locate corrosion, cracks, or welding defects Reconstruct 3D pipeline routes when GPS is unavailable When combined with odometers or magnetic markers, INS enables high-precision defect localization, crucial for pipeline integrity management. 3. Advantages of INS in Oil & Gas ✔️ No signal dependency — works in underground, underwater, and blocked environments ✔️ High dynamic performance — real-time attitude and motion output ✔️ Strong anti-interference capability — immune to electromagnetic and geological disturbances ✔️ Continuous data — provides complete motion and trajectory records These strengths make INS a key technology for modern intelligent drilling and digital oil & gas solutions. 4. Challenges & Future Development Despite its wide benefits, INS still faces: ⚠️ Error Accumulation Long-term integration causes drift; solutions include: Sensor fusion (INS + odometer + geomagnetic + pressure sensors) Advanced filtering algorithms ⚠️ High-Temperature & High-Pressure Conditions Downhole tools require INS components with: High thermal resistance High pressure tolerance Ruggedized packaging ⚠️ Cost Considerations High-precision INS systems are expensive and usually reserved for: Critical well sections Deepwater operations High-value drilling missions Conclusion Inertial Navigation Systems are transforming the oil & gas industry by enabling precise drilling control, accurate downhole measurements, reliable subsea navigation, and high-fidelity pipeline inspection. As sensor technologies continue to evolve, INS will play an even greater role in the automation, digitalization, and safety of modern energy exploration.  

Modern underground coal mining faces increasing demands for higher productivity, greater accuracy, and safer operations. Yet, real-world challenges remain significant: Directional deviation during long-distance cutting or advancing Frequent rail adjustments that slow down operations Poor visibility caused by dust, humidity, and water mist Difficulty identifying cutter head wear or damage in real time Heavy reliance on operator experience rather than data-driven control Limited automation under harsh underground conditions As mining moves toward digitalization and intelligent operations, the combination of Inertial Navigation Systems (INS), industrial cameras, and millimeter-wave radar offers a breakthrough solution—delivering accurate guidance, visual monitoring, and robust perception in the toughest underground environments. 01 Inertial Navigation: Keeping Every Advance Straight, Accurate, and Stable Because GNSS signals do not work underground, INS becomes the foundation for precise cutter direction control. Using gyroscopes, accelerometers, and sensor fusion algorithms, INS provides: ✔ Accurate straight-line guidance for any required advancing distance Regardless of whether the project requires tens, hundreds, or thousands of meters of straight-line advancing, INS maintains directional stability and consistency. ✔ Minimal deviation and reduced rework Real-time attitude monitoring allows early detection and correction of directional drift. ✔ Fewer rail adjustments With better directional accuracy, operators spend less time correcting rail alignment, improving overall efficiency. ✔ Reliable data foundation for automated advancing INS delivers the position and attitude data essential for future semi-automatic and fully automated loading or cutting systems. 02 Industrial Cameras: Real-Time Visibility of Cutter Head Health High dust concentration, low light, and high humidity make manual monitoring of the cutter head difficult and unsafe. High-protection industrial cameras (IP68/IP69K) solve this by providing: ✔ Real-time cutter wear and damage detection AI algorithms detect cracks, missing teeth, abnormal sparks, or deformation and trigger immediate alerts. ✔ Clear imaging in dusty, foggy, or wet environments Anti-fog heating, reinforced optical windows, and wide dynamic range imaging ensure visibility even under harsh conditions. ✔ Remote visual monitoring Operators can assess cutter conditions from the control room—safer and more efficient. ✔ Reduced equipment failures Early detection prevents serious failure modes such as cutter jamming or sudden blade breakage. 03 Millimeter-Wave Radar: Reliable Perception Beyond Dust and Water Mist Unlike cameras, millimeter-wave radar is highly resistant to dust, water vapor, and smoke—making it ideal for underground work. Radar enhances the system with: ✔ Stable distance and obstacle detection Even in near-zero visibility, radar provides accurate range measurements and obstacle identification. ✔ Detection of lateral deviation during advancing If the machine begins drifting off track, the radar identifies the shift early. ✔ Redundant sensing together with INS and cameras INS provides position and attitude Cameras monitor cutter condition Radar detects environmental obstacles and track deviationTogether, they form a robust, fail-safe sensing system. 04 Sensor Fusion: Driving the Next Era of Intelligent Mining INS, industrial cameras, and radar form a unified intelligent perception platform, enabling: 1) Fewer rail corrections More accurate guidance results in smoother advancing and less downtime. 2) Higher advancing efficiency Reduced rework, fewer interruptions, and early damage detection significantly improve productivity. 3) Lower equipment wear and maintenance cost Real-time visual and radar-based monitoring prevents unexpected cutter failures. 4) Full-process data recording and traceability Advancing trajectories, equipment status, and environmental data are automatically logged for analysis and optimization. 5) A solid foundation for semi-autonomous and fully autonomous mining Once perception and navigation are reliable, advanced automated control becomes achievable. 05 Ideal Application Scenarios This integrated system is especially well-suited for: Long-distance advancing and roadway development Tunnels or sections where rail deviation is frequent High-dust, high-humidity, or low-visibility environments Operations with high cutter wear or breakage risk Smart mine construction and intelligent equipment retrofits Across all these environments, the system improves safety, efficiency, and consistency—while greatly reducing manual burden. Conclusion: Intelligent Technologies Are Transforming Underground Mining By combining Inertial Navigation, industrial-grade imaging, and millimeter-wave radar, coal mines can move beyond the limitations of traditional manual advancing. These technologies enable: More precise operations Better equipment protection Higher efficiency Safer underground environments A gradual shift toward automated and unmanned mining This is not just an upgrade—it represents a major step toward the future of smart mining.  

Underwater inspection technologies are essential for offshore energy, marine engineering, and subsea communication infrastructure. From oil pipelines to fiber-optic cables, operators rely on compact, camera-equipped underwater vehicles to conduct visual inspections with high efficiency and accuracy. Because GNSS signals cannot penetrate water, these underwater platforms require a high-precision inertial navigation system (INS) to maintain stable heading and correct camera orientation throughout the mission. This article introduces a typical application scenario and explains how our Merak-M1 INS supports underwater inspection tasks. 1. Application Scenario: Compact Underwater Inspection Vehicle Modern inspection vehicles—typically small submarine-type platforms—are widely used for: Offshore and near-shore pipeline inspection Oil and gas subsea pipeline monitoring Underwater power and communication cable inspection General seabed visual surveys These units operate underwater for 1–2 hours, carrying onboard cameras and lighting systems to capture real-time video. Since the INS is installed inside the vehicle’s waterproof compartment or sealed electronics bay, it provides precise motion and orientation sensing during the entire mission. In many cases, the underwater unit collaborates with a surface support vessel. The vessel provides positioning data, while the onboard INS offers heading and attitude information crucial for maneuvering and image stabilization. 2. Technical Requirements for INS in Underwater Vehicles For underwater inspection equipment, the inertial navigation system must meet the following requirements: Environmental Integration Requirements Installed inside a sealed, customer-provided waterproof enclosure Compatible with marine-grade connectors and internal wiring harnesses Resistant to marine vibration and operational temperature conditions Performance Requirements Heading accuracy: 0.1°–0.2° Stable pitch and roll output for camera stabilization Reliable performance during low-speed movement, hovering, or drift Electrical & Interface Requirements Power supply options: 24 V DC or 115 V / 60 Hz Data output interfaces: NMEA-0183 RS485 Support for circular metal connectors and custom internal cabling These specifications ensure that the INS can function precisely once integrated into the vehicle’s protected compartment. 3. Recommended Solution: Merak-M1 Inertial Navigation System The Merak-M1 INS is well suited for compact underwater inspection platforms due to its accuracy, reliability, and versatile interface options. Key Advantages High-Precision Heading (0.1°–0.2°) Ensures accurate tracking along subsea pipelines and cables. Compact Size for Small Underwater Vehicles Easy to install inside sealed internal compartments. Multiple Interfaces for Marine Systems Supports NMEA-183, RS485, and other standard communication protocols. Works Seamlessly With Surface-Vessel Cooperative Navigation INS provides attitude and heading; the vessel supplies global position. The Merak-M1 maintains stable heading and attitude output even when the vehicle moves slowly or hovers, ensuring clear, steady video streams during inspection tasks. 4. Integration Options for Underwater Platforms To provide a complete inspection capability, the INS can be integrated with: HD / 4K underwater cameras LED lighting systems Tethered or fiber communication modules GNSS receivers on the surface vessel Custom waterproof wiring harnesses and sealed bays These combinations support a broad range of scientific, industrial, and offshore inspection missions. 5. Supporting Modern Underwater Robotics As maritime infrastructure expands, compact underwater inspection vehicles equipped with high-accuracy inertial navigation will continue to play key roles in: Pipeline maintenance Cable inspection and repair Marine engineering oversight Environmental monitoring Harbor, port, and hull inspection Our engineering team provides complete support for integration, including interface documentation, connector customization, and system configuration. If you are developing underwater inspection vehicles, ROVs, AUVs, or subsea monitoring platforms, we welcome you to contact us for tailored inertial navigation solutions optimized for marine environments.