Electric unicycle

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An electric unicycle (‘EUC,’ sometimes pronounced 'yuke') is a self-balancing personal transporter with a single wheel. The rider controls speed by leaning forwards or backwards, and steers by leaning and twisting the unit side to side with their feet. The self-balancing mechanism uses gyroscopes and accelerometers.

Operation[edit]

Most commercial units are self-balancing in the direction of travel only (single axis) with lateral stability being provided by the rider; more complex fully self-balancing dual-axis devices also need to self-balance from side to side. The control mechanisms of both use control moment gyroscopes, reaction wheels and/or auxiliary pendulums and can be considered to be inverted pendulum.[citation needed]

History[edit]

Trevor Blackwell demonstrates his prototype

Early experimentation[edit]

See also Monowheel

A hand-power monowheel was patented in 1869 by Richard C. Hemming[1] with a pedal-power unit patented in 1885.[2] Various motorized monowheels were developed and demonstrated during the 1930s without commercial success[3] and Charles F Taylor was granted a patent for a "vehicle having a single supporting and driving wheel" in 1964 after some 25 years of experimentation.[4]

Commercialisation[edit]

In 2003, Bombardier announced a conceptual design for such a device used as a sport vehicle, the Embrio.[5] In September 2004 Trevor Blackwell demonstrated a functional self-balancing unicycle, using the control-mechanism similar to that used by the Segway PT and published the designs as the Eunicycle.[citation needed] In 2008 RYNO Motors demonstrated their prototype unit.[6] In January 2009 Focus Designs demonstrates electric unicycle to Segway inventor.[7] In March 2010 Shane Chen of Inventist filed a patent application for a seatless electric unicycle (associated with the "Solowheel" product launched in February 2011).[8] In Oct 2010 Focus Designs published a video of an electric unicycle with hub motor and a seat.[9] Late in 2015, the Ford Motor Company patented a "self-propelled unicycle engagable with vehicle", intended for last-mile commuters.[10]

EUC riders participating in a group ride in San Francisco. Additional protective gear is worn due to higher top speed with newer EUC models.

By the turn of the decade, several Chinese manufacturers dominate the market and continue to release EUC models with higher top speeds (above 65 km/h or 40 mph),[11] longer range batteries, and new features like suspension.[12]

Popular culture[edit]

Gallery[edit]

Companies[edit]

See also[edit]

References[edit]

  1. ^ Improvement in velocipede, 1869
  2. ^ US Patent 325,548
  3. ^ "One-wheeled motorcycles: As cool as they are wildly dangerous". Wired. 24 March 2014.
  4. ^ US Patent 3,145,797
  5. ^ "Hot Wheel". Forbes.
  6. ^ "A brief history of the RYNO". RYNO.
  7. ^ "SBU meet the Segway | Self-Balancing Unicycle | Focus Designs, Inc". focusdesigns.com. Retrieved 2018-10-07.
  8. ^ "Solowheel self-balancing unicycle is as easy to ride as it is to afford". Wngadget. 2011-02-11.
  9. ^ focusdesigns (2010-10-11), Self Balancing Unicycle (SBU) V2.0, retrieved 2018-10-07
  10. ^ Read, Richard (December 29, 2015). "Ford Patent Could Transform Your Car Into A Unicycle". The Car Connection. Internet Brns Automotive Group. Retrieved 10 September 2016.
  11. ^ "Know this before buying a Veteran Sherman Electric Unicycle". oneradwheel.com. Retrieved 2020-11-15.
  12. ^ "New 31 mph and 3,000W electric unicycle announced with true suspension". electrek.co. Retrieved 2020-11-15.
  13. ^ ANALOG — Science Fiction/Science Fact, Vol. LXXXIII, No. 5, July 1969, pp. 120-151. Illustrations by Peter Skirka.
  14. ^ Solowheel
  15. ^ http://no-en.segway.com/about-us-(1)
  16. ^ https://www.ninebot.cn/
  17. ^ https://www.inmotionworld.com/company/who-we-are
  18. ^ https://www.kebye.com/
  19. ^ https://ecodrift.by/2020/03/12/about-king-song/
  20. ^ https://medium.com/@shanewhilde/what-we-know-about-the-veteran-sherman-electric-unicycle-591db2d4a70a
  21. ^ http://www.leaperkim.com/

Further reading[edit]

Research papers (in reverse date order)
Other