FUSE+ sensor fusion

What is sensor fusion and how does it help me?

A GNSS/INS system integrates a GNSS receiver with an inertial sensor, enhancing positioning reliability and availability while also delivering orientation data (heading, pitch, and roll) alongside high-precision positioning. In a sensor fusion setup, multiple sensors collaborate to achieve a level of performance and functionality that surpasses what a single sensor could offer. Besides the GNSS receiver, additional sensors can be integrated to further bolster positioning availability and reliability. As these sensors operate on diverse principles and utilize different inputs, it becomes feasible to compensate for each individual sensor's shortcomings, thereby strengthening the overall system's performance.

FUSE+ extended availability

When the sky is obstructed and GNSS receivers lose sight of satellites, their tracking capability is lost. However, by fusing a GNSS receiver with an IMU (Inertial Measurement Unit), which functions independently of external inputs, positioning availability can be significantly extended. In challenging environments with severe multipath issues that cannot be fully mitigated by APME+, FUSE+ offers enhanced positioning accuracy and availability.  

FUSE+ highest level of integrity

Septentrio's RAIM+ technology offers the system crucial insights into receiver accuracy by delivering honest uncertainty limits for positioning. FUSE+ elevates RAIM+'s capabilities even further by incorporating independent inputs that enable cross-verification of receiver calculations.

Are all sensor fusion systems created equal?  

The advantages of GNSS sensor fusion are evident, yet its full potential is realized through a profound understanding of GNSS technology, the most intricate component in this fusion ecosystem. With over two decades of experience in designing cutting-edge GNSS receivers, Septentrio has mastered the art of harnessing this technology, enabling us to develop FUSE+ and ensure optimal performance from each sensor in the system.

Which sensors are most often combined with GNSS, in an industrial environment?  

IMU is a commonly paired sensor with GNSS receivers, offering positioning capabilities without external input and immunity to environmental conditions. However, it is inherently vulnerable to shocks and vibrations.

Vehicle velocity is another valuable input, often readily accessible in control systems. This additional information enables the receiver to extend positioning availability in GNSS-denied areas and enhances integrity through an independent source. FUSE+ does not mandate the use of raw odometry data, instead offering users flexibility to obtain vehicle velocity through various sensors, such as LiDAR or cameras. The incorporation of vehicle velocity into FUSE+ is an optional feature.

Vehicle status

By employing multiple sensors, the detection of vehicle status becomes efficient without relying on external sensors. For instance, the IMU can effectively filter out GNSS positioning noise and accurately determine whether the vehicle has come to a complete stop.