Segway Navimow H500E - How the EFLS Works; EFLS Technology Overview; Satellite Signal Issues and Solutions

Multi-sensor data fusion improves the applicability of EFLS to complex environments, but serious satellite signal issues will still
greatly aect the normal operation of Navimow. Below are major cases of satellite signal issues:
Blocking
If there are any obstacles on or surrounding the antenna and/or the mower, the signal will be weakened or blocked.
Solution: DO NOT install the charging station and antenna under a roof, tree or anywhere that may block the signal. You can also
buy the antenna extension kit and install the antenna on the roof/wall.
Signal Interference
Signals from the satellite are transmitted to the antenna after being reflected by the wall, instead of directly from the sky. This
is called Multipath Eect.
Solution: install the antenna far from the house to get rid of the multipath eect. It is recommended not to use the mower in a
scenario with walls having long and flat surface nor the glass/metal walls. The long and flat surface/glass and metal surface will
interfere with the signal, hence the mower may bump into the walls. The map should not be built between two high walls,
because the walls will block the signal and the mower will not be able to work in this area.
EFLS （Exact Fusion Locating System) is Segway's unique high-precision fusion technology. Based on satellite positioning, EFLS
technology integrates various sensor data to improve positioning accuracy and fault tolerance through algorithm fusion.
The mower can locate itself through satellite signals, which can also be picked up by the antenna. By comparing the satellite
signals from the antenna and the mower, errors in the transmission of the signal (such as the oset of the satellite signal as it
travels through the ionosphere) can be minimized, improving satellite positioning accuracy to the centimeter level.
In addition, the data collected by the gyroscope, accelerometer, magnetic compass, and odometer sensors can also be integrated
into this system through Segway's data fusion algorithms, further improving the applicability of Navimow to various environments.
With EFLS technology, Navimow can draw a precise work area in complex outdoor environments without laying boundary wires,
and optimize the mowing path through algorithms in the work area to achieve planned mowing result and maximize mower's
work eciency.
communication
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lonosphere & troposphere lonosphere & troposphere
≥ 2m
communication
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1.6 How the EFLS Works
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