HFE International HFE INTERNATIONAL Click. Go. GenPod ®. www.hfeinternational.com (520)578-0818 CUAV Expo Americas 2023 | Report these corrections to the receiver to archive centimetre-level accuracy anywhere in the world.” In addition to providing centimetreaccurate positioning (within 0.03-0.06 m in real time, accounting for RMS errors), the PX-1 RTX provides heading data without influence from external magnetic fields. As a result, delivery UAVs do not need their own ground infrastructure for positioning accuracy, and their trajectory can be tightly constrained to avoid exceeding the boundaries of what are likely to be strictly defined flight corridors, especially in urban areas, where they might be authorised to fly. It also aids with safety and security to bystanders by providing centimetre accuracy for package or cargo drop-off. The GNSS-IMU board is included as part of a yearly subscription, and supports multiple frequency tracking of GPS, GLONASS, BeiDou and Galileo, as well as QZSS, SBAS and MSS L-band signals, delivering position, heading, pitch and roll at 100 Hz. It weighs 60 g, measures 67 x 60 x 15 mm, and consumes 3.5 W in normal operation over any connection from 9 to 30 V. Sixdof Space showed its solution for ultra-fast optical tracking, which was originally developed for tracking head movements in VR and AR applications, although as of the expo it has been re-engineered for precise, targeted landings with UAVs. “In a normal use case, our tech has infrared beacons placed on the landing spot, and our sensor is installed on a UAV,” said Mark Goldfarb. “The sensor sees only light – it’s not a camera – so instead of seeing the millions of pixels a camera sees, and needing to process all of that, it’s just a few thousand pixels. This is one of our tricks for reducing latency.” On top of that, the company has a patented optical technology that compresses this light information into a single row of data, which can then be used to guide the UAV down for landings precise enough to work on boats being rocked by high sea states, or trucks moving fast on poor roads. The technology provides readings in both altitude and orientation (hence the six degrees of freedom referenced in the company’s name), and the company has successfully tested the technology in both darkness and direct sunlight. “Our system works at 400 Hz, enough to compensate for very dynamic conditions including winds and gusts, and it reconnects quickly amid fast-moving obscurants to keep on working midlanding,” Goldfarb added. “The board weighs about 30 g, and the housing can be customised for end-users’ needs, or they can choose to integrate it into their own UAV’s hull.”
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