We help you watch your steps: Unobtrusive alertness system for pedestrian mobile phone users

Jiaqi Wen, Jiannong Cao, Xuefeng Liu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

15 Citations (Scopus)

Abstract

It is well recognized that walking while using mobile phones will make people more susceptible at various risks. Existing studies to improve smartphone users' safety are mainly limited to detecting incoming vehicles. They are not able to address some more common and equally dangerous accidents such as trips, falling from stairs, platforms or falling into an open manhole. These hazards are generally caused by sudden change of ground. In this paper, we propose UltraSee, the first system that is able to detect sudden change of ground for pedestrian mobile phone users. UltraSee augments smartphones with a small ultrasonic sensor which can detect the abrupt change of distance ahead. UltraSee also leverages the context information of smartphone usage such as screen status and holding orientation to improve detection accuracy and reduce energy consumption as well as unnecessary alarms. We have carried out extensive experiments in different scenarios and by different users. The results show that UltraSee can achieve accident detection rate of 94% with false positive rate of 4.4% and reduce unnecessary alarms by 90%. In terms of energy consumption, UltraSee costs only about 20% energy compared to the existing works that only rely on smartphone cameras.
Original languageEnglish
Title of host publication2015 IEEE International Conference on Pervasive Computing and Communications, PerCom 2015
PublisherIEEE
Pages105-113
Number of pages9
ISBN (Electronic)9781479980338
DOIs
Publication statusPublished - 1 Jan 2015
Event13th IEEE International Conference on Pervasive Computing and Communications, PerCom 2015 - St. Louis, United States
Duration: 23 Mar 201527 Mar 2015

Conference

Conference13th IEEE International Conference on Pervasive Computing and Communications, PerCom 2015
Country/TerritoryUnited States
CitySt. Louis
Period23/03/1527/03/15

ASJC Scopus subject areas

  • Computer Science Applications
  • Computer Networks and Communications
  • Software

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