Design of a Device for Hands-Free Tree Climbing

The URI senior capstone design Team 17 was tasked by Dr. Bahram Nassersharif to design and build a tree climbing device. It was required that said tree climbing device be: easy to operate, safe for both the operator and the tree, have hands free climbing capabilities, climb branch free trees with varying diameters between 12 and 24 inches up to 20 feet in height, have a carrying capacity up to 350 pounds, and cost less than 500 dollars to build. Team 17 began the design process to meet these requirements by first undertaking background research into the current tree climbing devices on the market today, including patent searches and viewing found solutions from around the world. This allowed Team 17 to move forward and generate 120 design concepts, finding many potential solutions using varying power sources and mounting methodologies. From these potential solutions the team evaluated each design on the design parameters set forth. The chosen design was a human powered device with a pneumatic assistance system. This design was chosen for its ease of use, low cost to manufacture and maintain, and potential loading capabilities. With a design chosen the team moved forward designing and redesign the device to meet the design specifications. Through testing of the various iterations of the design, engineering analysis, knowledge learned through research, the final design was built, meeting the required design specifications. This build was capable of holding 350 pounds and ascend branch less trees with varying diameter trees from 12 to 43 inches up to 20 feet. The design consists of two frame assemblies, connected through the pneumatic assistance system. A final engineering analysis was completed on this design, yielding a factor of safety of 1.5. The build cost a total of 463.95 dollars. Additional considerations were made including manufacturability, ease of use, environmental impacts, safety, operating environments, and reasonable servicing schedules; since use in remote locations is to be expected. The design is for any individual intending to climb a tree; including but not limited to hunters, arborists, and photographers

A global horizon scan of the future impacts of robotics and autonomous systems on urban ecosystems

Technology is transforming societies worldwide. A significant innovation is the emergence of robotics and autonomous systems (RAS), which have the potential to revolutionise cities for both people and nature. Nonetheless, the opportunities and challenges associated with RAS for urban ecosystems have yet to be considered systematically. Here, we report the findings of an online horizon scan involving 170 expert participants from 35 countries. We conclude that RAS are likely to transform land-use, transport systems and human-nature interactions. The prioritised opportunities were primarily centred on the deployment of RAS for monitoring and management of biodiversity and ecosystems. Fewer challenges were prioritised.Those that were emphasised concerns surrounding waste from unrecovered RAS, and the quality and interpretation of RAS-collected data. Although the future impacts of RAS for urban ecosystems are hard to predict, examining potentially important developments early is essential if we are to avoid detrimental consequences, but fully realise the benefits

The Design, Manufacture, and Testing of a Novel Adhesion System for a Climbing Vehicle

We present the design and fabrication of a prototype wall-climbing vehicle employing a unique combined locomotion and adhesion system in which the adhesive vacuum is transmitted through moving, perforated treads. Implementing the adhesion/drive system involved a broad range of design challenges, including: developing reliable sealing of sliding and static interfaces, understanding the frictional interactions between the drive treads and various vehicle components and surfaces on which they ride, as well as designing for lightness, manufacturability, and adjustability. The clean sheet design presented in this thesis was taken from concept to functioning prototype in less than 6 months, requiring a considered mix of off-the-shelf components, custom fabrication, and outsourced production. Proof of concept testing is reviewed, including static pressure and force results as well as dynamic vertical surface maneuverability trials

A global horizon scan of the future impacts of robotics and autonomous systems on urban ecosystems

Technology is transforming societies worldwide. A major innovation is the emergence of robotics and autonomous systems (RAS), which have the potential to revolutionize cities for both people and nature. Nonetheless, the opportunities and challenges associated with RAS for urban ecosystems have yet to be considered systematically. Here, we report the findings of an online horizon scan involving 170 expert participants from 35 countries. We conclude that RAS are likely to transform land use, transport systems and human–nature interactions. The prioritized opportunities were primarily centred on the deployment of RAS for the monitoring and management of biodiversity and ecosystems. Fewer challenges were prioritized. Those that were emphasized concerns surrounding waste from unrecovered RAS, and the quality and interpretation of RAS-collected data. Although the future impacts of RAS for urban ecosystems are difficult to predict, examining potentially important developments early is essential if we are to avoid detrimental consequences but fully realize the benefits

The Dawning of the Ethics of Environmental Robots

Environmental scientists and engineers have been exploring research and monitoring applications of robotics, as well as exploring ways of integrating robotics into ecosystems to aid in responses to accelerating environmental, climatic,and biodiversity changes. These emerging applications of robots and other autonomous technologies present novel ethical and practical challenges. Yet, the critical applications of robots for environmental research, engineering, protection and remediation have received next to no attention in the ethics of robotics literature to date. This paper seeks to fill that void, and promote the study of environmental robotics. It provides key resources for further critical examination of the issues environmental robots present by explaining and differentiating the sorts of environmental robotics that exist to date and identifying unique conceptual, ethical, and practical issues they present

Design of a 2 DOFs Mini Hollow Joint Actuated with SMA Wires

Shape memory alloys (SMAs) are smart materials used in robotics because of its light weight and high force-to-weight ratio. The low energy efficiency, up to 5%, has limited their use for large actuators. However, they have shown advantages in the design of mini-robots because of the limited volume required for the actuation system. The present study reports the design and construction of a mini compliant joint (MCJ) with a 2 degrees of freedom (DOFs) intersecting axis. The MCJ prototype has a 20 mm external diameter surrounding a cavity of 8 mm, weighs 2 g, is 20 mm high and can perform an angle rotation of 30 ∘ in less than 260 ms. It uses SMA NiTi wires in antagonistic configuration and springs to reduce the energy consumption and minimise heat production. The design methods and experimental results of the manufactured prototype are reported and discussed

Extending Our Scientific Reach in Arboreal Ecosystems for Research and Management

The arboreal ecosystem is vitally important to global and local biogeochemical processes, the maintenance of biodiversity in natural systems, and human health in urban environments. The ability to collect samples, observations, and data to conduct meaningful scientific research is similarly vital. The primary methods and modes of access remain limited and difficult. In an online survey, canopy researchers (n = 219) reported a range of challenges in obtaining adequate samples, including ~10% who found it impossible to procure what they needed. Currently, these samples are collected using a combination of four primary methods: (1) sampling from the ground; (2) tree climbing; (3) constructing fixed infrastructure; and (4) using mobile aerial platforms, primarily rotorcraft drones. An important distinction between instantaneous and continuous sampling was identified, allowing more targeted engineering and development strategies. The combination of methods for sampling the arboreal ecosystem provides a range of possibilities and opportunities, particularly in the context of the rapid development of robotics and other engineering advances. In this study, we aim to identify the strategies that would provide the benefits to a broad range of scientists, arborists, and professional climbers and facilitate basic discovery and applied management. Priorities for advancing these efforts are (1) to expand participation, both geographically and professionally; (2) to define 2–3 common needs across the community; (3) to form and motivate focal teams of biologists, tree professionals, and engineers in the development of solutions to these needs; and (4) to establish multidisciplinary communication platforms to share information about innovations and opportunities for studying arboreal ecosystems