GNSS Positioning & Navigation Systems, Mobile Mapping UAV LiDAR & Unmanned Surface Vehicles

Compact IMU-RTK GNSS Receiver & Camera Module for High-Accuracy 3D Modelling

The i89 tightly integrates cameras, GNSS and inertial measurement to provide high-accuracy surveying and 3D modelling capabilities By Mike Ball / 10 Oct 2023
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CHC Navigation (CHCNAV) has introduced the i89, a compact IMU-RTK GNSS receiver with visual surveying and 3D modeling capabilities. Powered by CHCNAV iStar 2.0 algorithms, the receiver incorporates advanced ionospheric modeling algorithms to achieve high-integrity RTK fix positioning, which is especially critical in regions of intense solar activity.

The integration of video photogrammetry into the CHCNAV i89 represents a significant leap forward in achieving comprehensive 3D mapping and surveying. This integration effectively bridges 3D GNSS IMU-RTK surveying and 3D LiDAR + RGB airborne surveying, combining complementary data sources for a more accurate visual representation.

The i89 features a 1408-channel full-GNSS module and integrated SoC. Its narrow-band multipath mitigation technology improves data quality by over 20%, ensuring accurate RTK measurements, and its hybrid GNSS engine provides excellent accuracy and reliability.

Equipped with CHC Navigation’s latest dynamic panoramic image capture mode, the i89 enables 3D modeling of buildings and facades, as well as the extraction of survey-grade 3D coordinates from real video, making it possible to accurately measure points where GNSS signals are obstructed, or access is difficult or unsafe. The i89 also allows drone data to be merged with GNSS RTK data for effective 3D modeling, overcoming the typical rendering distortions associated with drone-mounted cameras. The i89’s compatibility with industry-standard 3D modeling software ensures flexibility and convenience for users.

The i89’s built-in, interference-free 200 Hz Auto-IMU eliminates the need for manual initialization and provides reliable measurements. Automatic pole tilt compensation guarantees accuracy within 3 cm over a 60-degree tilt range. By tightly integrating vision and inertial measurement, the i89 supports Augmented Reality navigation and Virtual Pole Tip (VPT) stakeout, providing significant time savings for operators of all experience levels.

The i89 weighs just 750 grams and seamlessly integrates GNSS, IMU, and two cameras into a pocket-sized, IP68-rated receiver that can withstand a 2-meter drop from a survey pole. Its battery provides up to 16.5 hours of autonomy, and its intelligent 18W fast charge provides a full charge in just 3 hours, increasing operational efficiency and further extending battery life.

Rachel Wang, product manager at CHC Navigation, commented: “The i89 Visual GNSS Rover is an ideal solution for surveyors looking to perform high-precision 3D surveying and modeling tasks quickly, accurately, and cost-effectively. In the era of convergence towards 3D surveying, mapping, and engineering, the CHCNAV Visual GNSS RTK Series is proving to be the affordable ‘must have’ surveying system that enables field crews to perform a wide range of tasks from simple point measurement to complex volume calculation and joint 3D reality capture.”

To learn more, contact CHC Navigation: Visit Website Send Message View Supplier Profile
Posted by Mike Ball Mike Ball is our resident technical editor here at Unmanned Systems Technology. Combining his passion for teaching, advanced engineering and all things unmanned, Mike keeps a watchful eye over everything related to the unmanned technical sector. With over 10 years’ experience in the unmanned field and a degree in engineering, Mike’s been heading up our technical team here for the last 8 years. Connect & Contact