Unmanned Systems Technology 023 I Milrem Multiscope I Wireless charging I Logistics insight I InterGeo, CUAV London & USA show reports I VideoRay Defender I OS Engines GR400U-FI I Ultrabeam Hydrographic Ultra-2 I IMUs

54 by tablet, and places a spray can into the spray tool mechanism in the back of the UGV,” said Palle Flydtykjaer. “Or, if you have a layer of asphalt and you want to know the levelling is correct, you send the UGV to various points across the survey area and take height measurements using an integrated total- station sensor.” With a 4 kg lithium-ion battery, the TinySurveyor can operate for eight hours. For navigation data in multi-path heavy urban environments, a GNSS, an IMU and a gyroscope are integrated into the hub enclosure, and optical encoders for the total station are integrated into the two rear wheels. Abris Design Group exhibited a range of UAVs that have modular airframes to enable them to share similar parts across different models. The largest of Abris’ UAVs, the FLIRT (FLying Intelligent Robotic Tool) Surnia, has an MTOW of 11 kg and uses two forward-facing electric motors to achieve speeds of between 70 and 130 kph. “This design stemmed from our FLIRT Arrow, a hand- or catapult-launched survey and mapping UAV, which weighs 4.8 kg,” explained Vitalii Galetskyi. “It was then modified to create the HP Cetus, which evolved into the Surnia. “All three can use the same 1.1 m wing surfaces, tail sections, 1.8 kW motors, and propellers, but carry different cameras or payloads. They also use the same battery packs –10, 16, or 22 Ah 6C lithium-ion batteries.” The Arrow is designed to carry a Sony QX1 mirrorless camera with a 20 MP APS-C sensor and interchangeable lenses (or other cameras of similar specifications), while the HP Cetus uses a Sony Alpha 7R camera mounted on a gimbal, and the Surnia can use heavier sensors from Riegl or PhaseOne Industrial. All models can be fitted with universal wing extenders (0.25 m on each side) to enable them to fly longer distances. They increase the wingspan from 2.4 to 2.9 m for the Cetus and to 3.3 m for the Surnia. “These configurations, with their greater aspect ratio, are also useful for mapping missions up mountainsides, where greater lift is necessary,” Galetskyi added. SPH Engineering displayed its ground-penetrating radar (GPR) system for UAVs. While such systems are typically towed by ground vehicles, uneven, unreachable or unstable ground can make UAVs a more accurate, safer and cost-effective platform option for GPR missions such as geological surveys and locating objects under ice, as well as bathymetry. “Using a UAV also allows you to geo- tag all the measurements with GNSS coordinates more smoothly,” said Janis Kuze. “We conducted a test mission with Arctic Hot Point Solutions in Greenland to scan for lost WW2 planes under the ice, and found the efficiency of using UAVs to be magnitudes greater than using snowmobiles.” The GPR weighs 3.7 kg and is fastened under the UAV. It has its own battery to avoid the need for a power interface with the UAV. “Reducing the weight of the sensors was critical,” Kuze added. “Part of the solution meant removing the GPR’s onboard processor and rely instead on the UAV’s computer, which would record coordinates and timing anyway.” Drone Rescue Systems showcased three new UAV parachute systems, which December/January 2019 | Unmanned Systems Technology Abris Design Group’s FLIRT UAVs have modular airframes to allow sharing of parts The TinySurveyor from TinyMobileRobots in road line-printing action SPH Engineering’s ground-penetrating radar system