公开(公告)号：US10171638B2

公开(公告)日：2019-01-01

申请号：US15414683

申请日：2017-01-25

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Kang G. Shin ,  Yu-Chih Tung

IPC: H04M1/02 ,  G06F3/16 ,  G06F1/16 ,  G06F3/041

Abstract: ForcePhone is a novel system for enabling phones to recognize the force applied to their touchscreen and/or body. ForcePhone uses built-in sensors to measure the applied force via a physical property called structure-borne sound propagation. The phone plays an inaudible sound through the phone's speaker. When the phone is free to vibrate, the sound from the speaker easily travels through its body to the phone's microphone. When a force is applied to the phone, vibration is restricted and the sound traveling through the pathway is degraded. ForcePhone estimate the amount of applied force by monitoring the change in sound degradation.

公开(公告)号：US09829577B2

公开(公告)日：2017-11-28

申请号：US14816153

申请日：2015-08-03

Applicant: The Regents of The University of Michigan

Inventor： Kang G. Shin ,  Yu-Chih Tung

IPC: G01S15/00 ,  G01S15/42 ,  G01S15/46 ,  H04W4/02

CPC classification number: G01S15/42 ,  G01S15/46 ,  H04W4/02

Abstract: An active indoor location sensing technique is presented for smartphones and other types of mobile devices without requiring any additional sensors or pre-installed infrastructure. The main idea is to actively generate acoustic signatures by transmitting a sound signal with a phone's speakers and sensing its reflections with the phone's microphones. This active sensing achieves finer-grained control of the collected signatures than the widely-used passive sensing.

公开(公告)号：US10036809B2

公开(公告)日：2018-07-31

申请号：US14865262

申请日：2015-09-25

Applicant: The Regents of The University of Michigan

Inventor： Kang G. Shin ,  Yu-Chih Tung

IPC: G01S15/93 ,  G01S15/02 ,  G01S15/08 ,  G01S15/52

CPC classification number: G01S15/93 ,  G01S15/025 ,  G01S15/08 ,  G01S15/526

Abstract: Studies have shown that using smartphones while walking increases the probability of pedestrians colliding with obstacles. Techniques are presented for providing real-time warnings to distracted users of smartphones. The techniques are implemented by an application which makes use of sensors commonly found in most smartphone. By estimating distances to nearby objects using acoustic signals, a generalized solution is achieved without requiring any prior knowledge of the user's environment. The process can be enhanced by using images acquired from the phone's rear camera.