Robot Fish Makes Splash with Motion Breakthrough 
US Source: techbriefs 5/31/2023
Robot Fish Makes Splash with Motion Breakthrough
Credit: Tsam Lung You
A robot fish fitted with a twisted and coiled polymer (TCP) to drive it forward, a lightweight low-cost device that relies on temperature change to generate movement, could make underwater exploration more accessible.
 

TCP works by contracting like a muscle when heated, converting the energy into mechanical motion. The TCP used in this work is warmed by Joule heating — the passing of current through an electrical conductor, which produces thermal energy and heats up the conductor. Minimizing the distance between the TCP on one side of the robot fish and the spring on the other, activates the fin at the rear, enabling the robot fish to reach new speeds. The undulating flapping of its rear fin was measured at a frequency of 2Hz, two waves per second. The frequency of the electric current is the same as the frequency of tail flap.

 
Continue...

News Id SourceStampcountry
676Parks Canada announces watercraft and angling restrictions for Watertonlethbridgenewsnow2024-03-19CA
677Salmon farms are increasingly being hit by mass die-offsnewscientist2024-03-07NO
678Minnesota lake ice-out starts month earlyechopress2024-03-16US
679Scheme launched to tackle invasive carp populationsthefishsite2024-03-11US
680Future of Maines lucrative baby eel industry to be decided by regulatory boardfoxnews2024-03-14US
681The history of the red tilapiafarmersweekly2014-04-02ZA
682Secrets of the deep – how fish scales could confound counterfeitersnewatlas2024-02-26SG
683One of the worlds smallest transparent fish roars as loud as a gunshotinterestingengineering2024-02-27DE
684Men caught illegally snatching prehistoric creatures from Oregon baythenewstribune2024-02-27US
685Watch fish species chase lasers just like cats1news2024-03-14NZ
686Marine expert defends use of cameras on commercial fishing vessels1news2024-02-28NZ
687Annual Fish Health Report details causes of salmon mortalitythefishsite2024-03-13NO
688Ловля камбалы в Сочиohotniki2024-03-09RU
689Scientists continue to search for what's poisoning Lower Keys fishwlrn2024-03-01US
690Scientists discover new species of fish off Baja California coastFOX 5/KUSI2024-02-28MX
691Should all marine reserves ban fishing? Not necessarily, new study showsmongabay2024-02-29US
692This species occurs only here Snorkeling scientists count endangered fishreviewjournal2024-02-29ES
693Rare black paddlefish caught in Tulsa CountyFOX 13 News2023-05-26US
694Utrechts fish doorbell is back for another seasonBBC News2024-03-02DK
695Fishbowl shares joy of Ontario sports fishingcambridgetoday2024-03-13CA
696Fishers fined $29K banned from B.C. fishing lodge for illegal catchesctvnews2024-03-13CA
697Canadian fishing lodges see optimistic trends as U.S. tourists return post-pandemicechopress2024-03-08CA
698Open-water fishing ideasechopress2024-03-08US
699Maryland Catfish Tournaments Offer Invasive Species Anglingeinnews2024-03-11US
700Fogo Island: Bringing new life to a remote Canadian fishing communitycbsnews2024-03-10CA

214 215 216 27 of [217 - pages.]