Segway PT

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Segway PT
Black x2 and white i2.jpg
Segway x2 and i2
Type Personal transporter
Inventor Dean Kamen
Inception 2001 (2001)
Manufacturer Segway Inc.
Models made i2 SE, x SE, miniPro, robot
Website http://www.segway.com/ Edit this on Wikidata

The Segway PT (originally Segway HT) is a two-wheeled, self-balancing scooter by Segway Inc. Invented by Dean Kamen and launched in 2001, PT is an abbreviation for personal transporter, a term now used for generally for small electric portable transport devices. HT is an initialism for 'human transporter'.

History[edit]

Independent company[edit]

The Segway PT (referred to at the time as the Segway HT) was developed from the self-balancing iBOT wheelchair which was initially developed at University of Plymouth, in conjunction with BAE Systems and Sumitomo Precision Products.[1] Segway's first patent was filed in 1994 and granted in 1997[2] followed by others[3] including one submitted in June 1999 and granted in October 2001.[4]

The invention, development, and financing of the Segway was the subject of a book[5] and a leak of information prior to publication of the book and the launch of the product led to and excited speculation about the device and its importance. John Doerr speculated that it would be more important than the Internet.[6] South Park devoted an episode to making fun of the hype before the product was released. Steve Jobs was quoted as saying that it was "as big a deal as the PC",[6] (but later retracted that saying that the design "sucked").[7] The device was unveiled 3 December 2001, following months of public speculation,[8] in Bryant Park, New York City, on the ABC News morning program Good Morning America[9][10] with the first units delivered to customers in early 2002.[11]

The original Segway models were activated for three different speed settings: 6 miles per hour (9.7 km/h), 8 mph (13 km/h) with faster turning and 10 mph (16 km/h).[12] Steering of early versions was controlled using a twist grip that varied the speeds of the two motors, the range of the p-Series was 6–10 mi (9.7–16.1 km) on a fully charged nickel metal hydride (NiMH) battery with a recharge time of 4–6 hours. In September 2003, the Segway PT was recalled, because if users ignored repeated low battery warnings on the PTs, it could ultimately lead them to fall,[13] with a software patch to version 12.0, the PT would automatically slow down and stop in response to detecting low battery power.

In August 2006 Segway discontinued all previous models and introduced the i2 and x2 products which were steered by leaning the handlebars to the right or left,[14] had a maximum speed of 12.5 mph (20.1 km/h) from a pair of 2 horsepower (1.5 kW) Brushless DC electric motor with regenerative braking and a range of up to 15–25 mi (24–40 km), depending on terrain, riding style and state of the batteries.[15] Recharging took 8–10 hours. The i2 and x2 also introduced the wireless InfoKey which could show mileage and a trip odometer, as well as put the Segway into Security mode, which locked the wheels and set off an alarm if it was moved, and could also be used to turn on the PT from up to 15 feet (4.6 m) away.[12]

Versions of the product prior to 2011 included (in order of release):[16]

  • Segway i167.
  • Segway e167: As i167, with addition of electric kickstand.
  • Segway p133: Smaller platform and wheels and less powerful motors than the i and e Series with top speed was 10 miles per hour (16 km/h) in the p-Series.
  • Segway i180: With lithium-ion batteries.[17]
  • Segway XT: The first Segway HT designed specifically for recreation.
  • Segway i2 (2006): The first on-road Segway PT with LeanSteer.
  • Segway x2 (2006): The first off-road Segway PT with LeanSteer.

In March 2014, Segway announced third generation designs, including the i2 SE and x2 SE sport, new LeanSteer frame and powerbase designs, with integrated lighting.[18]

Subsidiary of Ninebot[edit]

Ninebot Inc., a Beijing-based transportation robotics startup acquired Segway in April 2015 having raised $80M From Xiaomi And Sequoia Capital.[19]

In June 2016 the company launched the Segway miniPRO, a smaller self-balancing scooter.[20]

Products[edit]

As of July 2017 the following self-balancing scooters are available from Segway (For other Segway products see Segway Inc.):

Professional
  • Segway i2 SE (professional self-balancing scooter for use in warehouses and other locations)[21]
  • Segway x2 SE (ruggedised self-balancing scooter for use on most challenging terrain)[22]
  • Segway Robot (autonomous robot based on the Segway miniPro)[23]
Consumer
  • Ninebot by Segway E+ (self-balancing scooter for general use)[24]
  • Ninebot by Segway miniPro (smaller self-balancing scooter for general use, controlled by a 'knee control bar')[25]

Technology[edit]

The dynamics of the Segway PT are similar to a classic control problem, the inverted pendulum, it uses brushless DC electric motors in each wheel powered by lithium-ion batteries with balance achieved using tilt sensors, and gyroscopic sensors developed by BAE Systems' Advanced Technology Centre.[26] The wheels are driven forward or backward as needed to return its pitch to upright.

Usage[edit]

See also: Personal transporter#International regulation
Two tourists on a Segway tour in Florence, Italy

In 2011 the Segway i2 was being marketed to the emergency medical services community,[27] the special police forces trained to protect the public during the 2008 Summer Olympics used the Segway for mobility.[28]

The Segway miniPro is also available to be used as the mobility section of a robot.[29]

Disability Rights Advocates for Technology[30] promoted the use of the Segway PT on sidewalks as an Americans with Disabilities Act of 1990 (ADA) issue. Segway Inc. cannot however market these devices in the US as medical devices (as per agreement with Johnson & Johnson with regard to the iBOT, a self-balancing wheelchair)[31] and they have not been approved by the Food and Drug Administration as a medical device.[citation needed]

The maximum speed of the Segway PT is 12.5 miles per hour (20.1 km/h). The product is capable of covering 24 mi (39 km) on a fully charged lithium-ion battery, depending on terrain, riding style, and the condition of the batteries.[32] The Bicycle Helmet Safety Institute recommends that all riders wear helmets when using Segways,[33] the U.S. Consumer Product Safety Commission does not have Segway-specific recommendations but does say that bicycle helmets are adequate for "low-speed, motor-assisted" scooters.[34]

See also[edit]

References[edit]

  1. ^ Kemper, Steve (2003). Code name Ginger : the story behind segway and Dean Kamen's quest to invent a new world. Boston, Mass.: Harvard Business School Press. p. 27. ISBN 9781578516735. Retrieved 23 June 2016. 
  2. ^ US patent 5,701,965 Human transporter
  3. ^ "Segway Patent Information" (PDF). Segway Inc. 
  4. ^ US Patent 6,302,230 Personal mobility vehicles and methods
  5. ^ Kemper, Steve (2003). Reinventing the Wheel: A Story of Genius, Innovation, and Grand Ambition. ISBN 1578516730. 
  6. ^ a b "Reinventing the Wheel". TIME. 2 December 2001. Retrieved 11 March 2009. 
  7. ^ Kemper, Steve (16 June 2003). "Steve Jobs and Jeff Bezos meet "Ginger"". Harvard Business School Working Knowledge. 
  8. ^ "January 26, 2000". The Daily Show. 26 July 2000. Archived from the original on 2 July 2015. 
  9. ^ Machrone, Bill (3 December 2001). "Ginger Unveiled-It's a Scooter!". Extremetech.com. Retrieved 11 March 2009. 
  10. ^ Tweney, Dylan. "Wired.com retrospective". Retrieved 2009-04-12. 
  11. ^ "About Segway - Who We Are - Segway Milestones". Segway. Archived from the original on 18 March 2009. Retrieved 11 March 2009. 
  12. ^ a b "Segway, Official Site". Segway.com. 28 April 2011. Archived from the original on 27 October 2011. Retrieved 6 November 2011. 
  13. ^ "Segway LLC Recall to Upgrade Software on Segway Human Transporters". Cpsc.gov. 26 September 2003. Archived from the original on 22 September 2008. Retrieved 11 March 2009. 
  14. ^ "Segway i2". Segway.com. Archived from the original on 7 January 2009. Retrieved 11 March 2009. 
  15. ^ "Enhanced range, courtesy of lithium-ion". Archived from the original on 17 October 2006. Retrieved 29 November 2010. 
  16. ^ "Segway PT Previous Model". Segway Inc. Archived from the original on 9 July 2011. Retrieved 23 July 2011. 
  17. ^ The versatile Segway PT i180 Archived 12 August 2007 at the Wayback Machine.
  18. ^ "Segway Launches New SE Personal Transporters (PTs) And SegSolution Accessory Packages". reuters.com. Retrieved 2014-03-22. [dead link]
  19. ^ Catherine Shu (15 April 2015). "Beijing-based Ninebot Acquires Segway, Raises $80M From Xiaomi And Sequoia". TechCrunch. 
  20. ^ "Segway launches $1,000 self-balancing scooter you can control like a drone from your phone". Venture Beat. 1 June 2016. 
  21. ^ "Segway I2 SE". Segway Inc. Retrieved 13 July 2017. 
  22. ^ "Segway x2 SE". Segway Inc. Retrieved 13 July 2017. 
  23. ^ "Meet Loomo". Segway Robotics. Retrieved 13 July 2017. 
  24. ^ "Ninebot by Segway E+". Segway Inc. Retrieved 13 July 2017. 
  25. ^ "Segway miniPro". Segway Inc. Retrieved 13 July 2017. 
  26. ^ "Segway - About Us - Press Releases - BAE SYSTEMS and Segway LLC Announce Partnership to Market Segway Human Transporter in the UK - 22 Jul 2002". segway-madrid.com. 
  27. ^ "EMS LifeLine". StreetSmart Segway. Archived from the original on 14 November 2011. Retrieved 6 November 2011. 
  28. ^ "Wheel scary: Chinese anti-terror police practise killing drills on scooters | Mail Online". Mailonsunday.co.uk. 2 July 2008. Retrieved 11 March 2009. 
  29. ^ "Robot Segway Rovers Train Special Forces For Urban Warfare". Inventorspot.com. 12 April 2010. Retrieved 2010-04-18. 
  30. ^ "Disability Rights Advocates for Technology". Archived from the original on 27 August 2008. Retrieved 6 August 2008. 
  31. ^ Higginbotham, Adam (27 October 2008). "Dean Kamen: part man, part machine". The Daily Telegraph. London. Archived from the original on 14 August 2009. Retrieved 26 September 2009. 
  32. ^ "i2 SE Personal Transporter". Archived from the original on 27 May 2016. Retrieved 24 May 2016. 
  33. ^ "Bicycle Helmet Safety Institute". Retrieved 2008-08-05. 
  34. ^ "CPSC Guide:Which Helmet for Which Activity" (PDF). Archived from the original (PDF) on 20 September 2008. Retrieved 5 August 2008. 

External links[edit]