In this up to date article, we take a quick view at the top drones with obstacle detection and collision avoidance technology. Now the latest drones from DJI, Walkera, Yuneec and others have front, back, below and side obstacle avoidance sensors.Īt the time of writing there is only 2 drones, which has all 6 directions of obstacle detection. This obstacle detection and avoidance technology started with sensors detecting objects in front of the drone. This year, we have quite a few drones with collision avoidance technology. ![]() ![]() Drones with obstacle detection and collision avoidance sensors are becoming more prevalent in both the consumer and professional sectors.
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![]() ![]() Two-dimensional materials (2DMs) are considered as prime candidates for significantly extending the functionality of silicon chips, referred to as ‘CMOS + X’. The good agreement with the predictions of a theoretical analysis underlines the potential of this hybrid system for emerging electronic applications. The charge injection induces a band gap in the adsorbed graphene layer of about (73 ± 3) meV at the Dirac point. Weak hydrogen bonds formed between the hydroxylated sapphire surface and the π-electron system of SLG result in a clean interface. In contrast, adsorption of CVD SLG on the hydroxyl-terminated α-Al 2O 3 (0001) terraces results in a superstructure with a periodicity of (2.66 ± 0.03) nm. Regions near the sapphire step edges show tiny wrinkles with a height of about 0.2 nm, framed by delaminated graphene as identified by the typical Dirac cone of free graphene. ![]() ![]() By applying a comprehensive analysis approach, distinct interactions at the graphene-sapphire interface and local variations caused by the substrate topography are revealed. Metal-free chemical vapor deposition (CVD) of single-layer graphene (SLG) on c-plane sapphire has recently been demonstrated for wafer diameters of up to 300 mm, and the high quality of the SLG layers is generally characterized by integral methods. |