公开(公告)号：US08645062B2

公开(公告)日：2014-02-04

申请号：US13745186

申请日：2013-01-18

Applicant: Texas Instruments Incorporated

Inventor： June Chul Roh ,  Deric Wayne Waters ,  Srinath Hosur ,  Goutam Dutta

IPC: G01C21/16

CPC classification number: G01S19/47 ,  G01C21/165 ,  G01C21/28 ,  G01C22/006 ,  G06F17/16

Abstract: Embodiments of the invention provide a step detection. An accelerometer measurement in the form of a multi-dimensional acceleration vector is obtained. The magnitude of the accelerometer measurement is filtered using a low pass filter. A threshold for a down-crossing is provided as is a threshold for an up-crossing. A step detection is triggered if the magnitude of the accelerometer measurement is greater than or equal to the threshold for an up-crossing.

Abstract translation: 本发明的实施例提供了步骤检测。 获得多维加速度矢量形式的加速度计测量。 使用低通滤波器对加速度计测量的幅度进行滤波。 提供了一个下划线的阈值，就像上一交叉口的阈值一样。 如果加速度计测量的幅度大于或等于上行阈值，则触发步进检测。

公开(公告)号：US11808605B2

公开(公告)日：2023-11-07

申请号：US17674993

申请日：2022-02-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jayawardan Janardhanan ,  Sandeep Rao ,  Goutam Dutta

IPC: G01C22/00 ,  G01C21/18 ,  G06F1/16 ,  G01C21/20 ,  G01P15/00 ,  G01C21/16 ,  G01F15/00

CPC classification number: G01C22/006 ,  G01C21/165 ,  G01C21/18 ,  G01C21/185 ,  G01C21/188 ,  G01C21/206 ,  G01P15/00 ,  G06F1/163 ,  G01C21/1654 ,  G01C21/1656 ,  G01F15/00

Abstract: A system (10) for pedestrian use includes an accelerometer (110) having multiple electronic sensors; an electronic circuit (100) operable to generate a signal stream representing magnitude of overall acceleration sensed by the accelerometer (110), and to electronically correlate a sliding window (520) of the signal stream with itself to produce peaks at least some of which represent walking steps, and further operable to electronically execute a periodicity check (540) to compare different step periods for similarity, and if sufficiently similar then to update (560) a portion of the circuit substantially representing a walking-step count; and an electronic display (190) responsive to the electronic circuit (100) to display information at least in part based on the step count. Other systems, electronic circuits and processes are disclosed.

公开(公告)号：US11255695B2

公开(公告)日：2022-02-22

申请号：US16451380

申请日：2019-06-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jayawardan Janardhanan ,  Sandeep Rao ,  Goutam Dutta

IPC: G01C22/00 ,  G01C21/20 ,  G01C21/16 ,  G01P15/00 ,  G01C21/18 ,  G06F1/16 ,  G01F15/00

Abstract: A system (10) for pedestrian use includes an accelerometer (110) having multiple electronic sensors; an electronic circuit (100) operable to generate a signal stream representing magnitude of overall acceleration sensed by the accelerometer (110), and to electronically correlate a sliding window (520) of the signal stream with itself to produce peaks at least some of which represent walking steps, and further operable to electronically execute a periodicity check (540) to compare different step periods for similarity, and if sufficiently similar then to update (560) a portion of the circuit substantially representing a walking-step count; and an electronic display (190) responsive to the electronic circuit (100) to display information at least in part based on the step count. Other systems, electronic circuits and processes are disclosed.

公开(公告)号：US09121714B2

公开(公告)日：2015-09-01

申请号：US14180488

申请日：2014-02-14

Applicant: Texas Instruments Incorporated

Inventor： Jayawardan Janardhanan ,  Goutam Dutta ,  Varun Tripuraneni

IPC: G01C21/16 ,  G01C21/20 ,  G01C22/00

CPC classification number: G01C21/16 ,  G01C21/165 ,  G01C21/20 ,  G01C22/006

Abstract: A user-heading determining system (10) for pedestrian use includes a multiple-axis accelerometer (110) having acceleration sensors; a device-heading sensor circuit (115) physically situated in a fixed relationship to the accelerometer (110); an electronic circuit (100) operable to generate signals representing components of acceleration sensed by the accelerometer (110) sensors, and to electronically process at least some part of the signals to produce an estimation of attitude of a user motion with respect to the accelerometer, and further to combine the attitude estimation (750, α) with a device heading estimation (770, ψ) responsive to the device-heading sensor circuit, to produce a user heading estimation (780); and an electronic display (190) responsive to the electronic circuit (100) to display information at least in part based on the user heading estimation. Other systems, circuits and processes are also disclosed.

Abstract translation: 用于行人使用的用户航向确定系统（10）包括具有加速度传感器的多轴加速度计（110） 物理地位于与所述加速度计（110）固定关系的设备航向传感器电路（115）; 电子电路（100），其可操作以产生表示由所述加速度计（110）传感器感测到的加速度的分量的信号，并且电子处理所述信号的至少一部分以产生相对于所述加速度计的用户运动姿态的估计， 并且进一步将所述姿态估计（750，α）与响应于所述设备航向传感器电路的设备航向估计（770，ψ）组​​合以产生用户航向估计（780）; 以及响应于所述电子电路（100）至少部分地基于所述用户标题估计来显示信息的电子显示器（190）。 还公开了其它系统，电路和过程。