Shih-Chung Kang,Pei-Chun Lin,Yung-Shun Su,Ci-Jyun Liang,Pei-Yi Lee,Yao-Yu Yang,Kevin Lin,Chuan-En Lee
申请号：
US14015584
公开号：
US09549861B2
申请日:
2013.08.30
申请国别(地区):
US
年份:
2017
代理人:
摘要：
An early warning method and a device for preventing a wheelchair from tipping over are described. The early warning method includes projecting a laser light pattern, scanning the laser light pattern, making a comparison to determine whether the ground is a barrier terrain, and issuing an early warning to the user in situations of risk. The laser light pattern is projected onto the ground and compared with a standard pattern. The early warning is generated and is one selected from a group consisting of a beep, a warning message and a vibration to alert the wheelchair user to the danger of the barrier terrain.
