A disappearing Economist paysite article on artificial seal whiskers and submarine movement detection prompted Pete to find similar information on a free site.
SEE WHOLE 3DPRINT.COM ARTICLEWHICH HAS DIAGRAMS
So I located a 3DPRINT.COM articleof January 17, 2018. The following is an abridged version which begins:
“3D Printed Sensor Mimics Seal Whiskers to Detect Underwater Vortices
by Clare Scott | Jan 17, 2018 | 3D Printing, Science & Technology |
The word pinniped refers to semi-aquatic fin- or flipper-footed mammals, including to seals, sea lions and walruses. These creatures also have whiskers, which...serve an important purpose – they help the pinnipeds track their prey underwater by sensing the vortices left behind by the movement of said prey. A group of researchers in the Department of Mechatronics Engineering at Jeju National University in South Korea believe that a sensor based on the pinnipeds’ method of hunting could be valuable for soft robotics and underwater exploration, [Pete Comment: And to detect submarine and AUV water movement] they set out to create one using 3D printing.
The research was described in a paper entitled “Fully 3D Printed Multi-Material Soft Bio-Inspired Whisker Sensor for Underwater-Induced Vortex Detection,” which you can read here...”
“.. The dual-extruder 3D printer was used to print the sensor itself, using the first head, out of polyurethane purchased from Fotopolymer, while the second head printed the graphene patterns from filament bought from Black Magic 3D. After printing was complete, the base and the patterns were connected using copper tape. Copper tape was also used to solder signal wires, and a final 1mm water protection polyurethane layer was dip coated and cured with UV light.
The researchers then tested the sensors, using them to detect the vortices by digitizing the analog signals that indicate resistance changes and sending them to a microcontroller. They concluded that the design and fabrication of the whisker sensor is simple, quick, low cost, and easily deployable in commercial applications, as well as delivering good sensitivity and mechanical reliability. Some further development is needed; however, the study was overall a successful one...
Authors of the paper include Jahan Zeb Gul, Kim Young Su, and Kyung Hyun Choi.”
SEE WHOLE 3DPRINT.COM ARTICLEWHICH HAS DIAGRAMS