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    Force sensing based on structure-borne sound propagation
    21.
    发明授权
    Force sensing based on structure-borne sound propagation 有权

    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.

    Coordination amongst heterogeneous wireless devices
    22.
    发明授权
    Coordination amongst heterogeneous wireless devices 有权
    异构无线设备之间的协调

    公开(公告)号：US09197981B2

    公开(公告)日：2015-11-24

    申请号：US13770601

    申请日：2013-02-19

    Applicant: The Regents of The University of Michigan

    Inventor： Kang G. Shin ,  Xinyu Zhang

    IPC: H04W4/00 ,  H04W56/00 ,  H04W76/02 ,  H04W88/02 ,  H04W52/02

    CPC classification number: H04W4/00 ,  H04W52/0245 ,  H04W56/001 ,  H04W76/11 ,  H04W88/028 ,  Y02D70/122 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162

    Abstract: A computer-implemented method is proposed for coordinating communication amongst wireless communication devices in a wireless network. The coordination scheme creates a side channel between heterogeneous wireless devices to enhance their cooperation. At the transmitter, the coordination scheme appends a customized preamble to a data payload, where the preamble is comprised of a sequence of energy pulses separated by a gap and the duration of the gap encodes coordination data for the receive device. At the receiver, the coordination scheme detects the preamble of the data packet; extracts the coordination data from the preamble of the data packet; and coordinates communication between the transmit device and the receive device using the coordination data.

    Abstract translation: 提出了一种用于协调无线网络中的无线通信设备之间的通信的计算机实现的方法。 协调方案在异构无线设备之间创建一个侧面通道，以增强他们的合作。 在发射机处，协调方案将定制的前导码附加到数据有效载荷，其中前导码包括由间隔分隔的能量脉冲序列，间隙的持续时间编码用于接收设备的协调数据。 在接收机处，协调方案检测数据包的前导码; 从数据包的前导码中提取协调数据; 并使用协调数据协调发送设备与接收设备之间的通信。

    User aware charging algorithm that reduces battery fading
    23.
    发明授权
    User aware charging algorithm that reduces battery fading 有权

    公开(公告)号：US11258285B2

    公开(公告)日：2022-02-22

    申请号：US15984843

    申请日：2018-05-21

    Applicant: The Regents of The University of Michigan

    Inventor： Kang G. Shin ,  Liang He

    IPC: H02J7/00

    Abstract: An user-interactive charging paradigm is presented that tailors the device charging to the user's real-time needs. The core of approach is a relaxation-aware charging algorithm that maximizes the charged capacity within the user's available time and slows down the battery's capacity fading. The approach also integrates relaxation-aware charging algorithm existing fast charging algorithms via a user-interactive interface, allowing users to choose a charging method based on their real-time needs. The relaxation-aware charging algorithm is shown to slow down the battery fading by over 36% on average, and up to 60% in extreme cases, when compared with existing fast charging solutions. Such fading slowdown translates to, for instance, an up to 2-hour extension of the LTE time for a Nexus 5X phone after 2-year usage, revealed by a trace-driven analysis based on 976 charging cases collected from 7 users over 3 months.

    Method to estimate battery health for mobile devices based on relaxing voltages
    24.
    发明授权
    Method to estimate battery health for mobile devices based on relaxing voltages 有权

    公开(公告)号：US11215675B2

    公开(公告)日：2022-01-04

    申请号：US16605893

    申请日：2018-04-17

    Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

    Inventor： Kang G. Shin ,  Liang He

    IPC: G06F11/30 ,  G01R31/392 ,  G01R31/3835 ,  G01R31/36

    Abstract: Mobile devices are only as useful as their battery lasts. Unfortunately, the operation and life of a mobile device's battery degrade over time and usage. The state-of-health (SoH) of batteries quantifies their degradation, but mobile devices' support for its estimation is very poor due mainly to the limited hardware and dynamic usage patterns, causing various problems such as shutting off the devices unexpectedly. To remedy this lack of support, a low-cost user-level SoH estimation service is developed for mobile devices based only on their battery voltage, which is already available on all commodity mobile devices. The design of the estimation service is inspired by an empirical observation that the relaxing voltages of a device battery fingerprint its SoH, and is steered by extensive measurements with 13 batteries used for various devices, such as Nexus 6P, Nexus 5X, Xperia Z5, Galaxy S3, iPhone 6 Plus, etc.

    Detecting vehicle maneuvers with mobile phones
    25.
    发明授权
    Detecting vehicle maneuvers with mobile phones 有权

    公开(公告)号：US09834222B2

    公开(公告)日：2017-12-05

    申请号：US15135956

    申请日：2016-04-22

    Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

    Inventor： Kang G. Shin ,  Dongyao Chen

    IPC: B60W40/10 ,  B60W40/06 ,  B60W40/09 ,  H04W4/04

    CPC classification number: B60W40/10 ,  B60W40/06 ,  B60W40/09 ,  B60W2420/905 ,  H04W4/046

    Abstract: A vehicle maneuver detection application is proposed for driving assistant systems. The application can accurately and inexpensively detect and differentiate vehicle steering maneuvers by utilizing built-in sensors on smartphones or other portable computing device residing in a vehicle. By leveraging an effective bump detection algorithm and studying the nature of steering, the application is capable of differentiating various steering patterns, such as lane change, turn, and driving on curvy roads. Practicality of the application is demonstrates by two use cases: careless steering detection and fine-grained lane guidance. Thus, the application provides new functionalities without relying on cameras to provide a broader range of driving assistance.

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