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公开(公告)号：US10516402B2
公开(公告)日：2019-12-24
申请号：US16232893
申请日：2018-12-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric Paul Lindgren , Arvind Sridhar , Jayawardan Janardhanan
IPC: H03L7/085
Abstract: A selection circuit receives a plurality of reference clocks. The selection circuit is controlled by a control signal to output one of the plurality of reference clocks. A phase-locked loop couples to an output of the selection circuit and uses the selected reference clock for phase locking an output clock. A plurality of reference clock window detector circuits is included. Each reference clock window detector circuit receives a separate reference clock. Each reference clock window detector circuit asserts an error signal responsive to an early reference clock edge error in which the reference clock window detector circuit detects a reference clock edge before expiration of an early time window. Further, each reference clock window detector circuit asserts the error signal responsive to a late reference clock edge error in which the reference clock window detector circuit detects a reference clock edge after expiration of a late time window.
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22.发明申请ATTITUDE ESTIMATION FOR PEDESTRIAN NAVIGATION USING LOW COST MEMS ACCELEROMETER IN MOBILE APPLICATIONS, AND PROCESSING METHODS, APPARATUS AND SYSTEMS 审中-公开在移动应用中使用低成本MEMS加速度计的PEDESTRIAN导航的姿态估计和处理方法，装置和系统公开(公告)号：US20160290807A1
公开(公告)日：2016-10-06
申请号：US15151067
申请日：2016-05-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jayawardan Janardhanan , Goutam Dutta , Varun Tripuraneni
IPC: G01C21/16
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。
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23.发明授权Undocking and re-docking mobile device inertial measurement unit from vehicle 有权移动设备惯性测量单元从车辆拆卸和重新对接公开(公告)号：US09383209B2
公开(公告)日：2016-07-05
申请号：US14034486
申请日：2013-09-23
Applicant: Texas Instruments Incorporated
Inventor： Sachin Bhardwaj , Sriram Murali , Jaiganesh Balakrishnan , Jayawardan Janardhanan , Yogesh Shekar , Goutam Dutta
CPC classification number: G01C21/165 , G01C21/16 , G01C21/20
Abstract: According to an aspect of the present disclosure, the relative attitude between an inertial measurement unit (IMU), present on a mobile device, and the frame of reference of the vehicle carrying mobile device is estimated. The estimated relative attitude is used to translate the IMU measurement to the vehicle frame of reference to determine the velocity and position of the vehicle. As a result, the vehicle position and velocity are determined accurately in the event of undocking and re-docking of the mobile device from a docking system in the vehicle. The relative attitude is estimated in terms of pitch, roll, and yaw angles.
Abstract translation: 根据本公开的一个方面，估计出现在移动设备上的惯性测量单元（IMU）与携带移动设备的车辆的参考系之间的相对姿态。 估计的相对姿态用于将IMU测量值转换为车辆参考系，以确定车辆的速度和位置。 结果，在移动设备从车辆中的对接系统脱离和重新对接的情况下，准确地确定车辆位置和速度。 根据俯仰角，俯仰角和偏航角估计相对姿态。
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公开(公告)号：US20160054146A1
公开(公告)日：2016-02-25
申请号：US14830206
申请日：2015-08-19
Applicant: Texas Instruments Incorporated
Inventor： Deric Wayne Waters , Jayawardan Janardhanan , Saket Thukral
IPC: G01C23/00
CPC classification number: G01C23/00 , A61B5/0006 , A61B5/0022 , A61B5/0537 , A61B8/488 , A61B8/565 , G01C21/16 , G01D18/00 , G01S19/34 , G01S19/47 , G01S19/48 , G01S19/49 , G06F1/32 , G06F19/3418 , G06K9/62 , G08B21/0423 , G16H15/00 , G16H20/30 , G16H40/40 , H04N5/232 , H04N5/23241 , H04N7/18
Abstract: A system comprises a plurality of sensors, a sensor processor, and a sampling rate engine. The sensor processor is coupled to an output of each sensor of the plurality of sensors. The sensor processor estimates user dynamics in response to a first output signal of a first sensor of the plurality of sensors. The sampling rate engine is coupled to an output of the sensor processor./ The sampling rate engine determines a sampling rate value of a second sensor of the plurality of sensors in response to a user dynamics value from the sensor processor. The second sensor comprises a selectable sampling rate. The selectable sampling rate is configured in response to the sampling rate value determined by the sampling rate engine.
Abstract translation: 系统包括多个传感器，传感器处理器和采样率引擎。 传感器处理器耦合到多个传感器中的每个传感器的输出端。 传感器处理器响应于多个传感器中的第一传感器的第一输出信号来估计用户动态。 采样率引擎耦合到传感器处理器的输出端。采样率引擎响应于来自传感器处理器的用户动态值来确定多个传感器中的第二传感器的采样率值。 第二传感器包括可选择的采样率。 可选择的采样速率被配置为响应于由采样率引擎确定的采样率值。
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公开(公告)号：US20160041013A1
公开(公告)日：2016-02-11
申请号：US14830170
申请日：2015-08-19
Applicant: Texas Instruments Incorporated
Inventor： Deric Wayne Waters , Jayawardan Janardhanan , Saket Thukral
IPC: G01D18/00
CPC classification number: G01C23/00 , A61B5/0006 , A61B5/0022 , A61B5/0537 , A61B8/488 , A61B8/565 , G01C21/16 , G01D18/00 , G01S19/34 , G01S19/47 , G01S19/48 , G01S19/49 , G06F1/32 , G06F19/3418 , G06K9/62 , G08B21/0423 , G16H15/00 , G16H20/30 , G16H40/40 , H04N5/232 , H04N5/23241 , H04N7/18
Abstract: Method including detecting low user dynamics by a first MEMS sensor is provided. A first sensor determines sampling rate value corresponding to the low user dynamics. The first sensor sampling rate value is less than a second sensor sampling rate value corresponding to high user dynamics. A sampling rate of a second MEMS sensor is adjusted to the first sensor sampling rate value.
Abstract translation: 提供了包括通过第一MEMS传感器检测低用户动态的方法。 第一传感器确定对应于低用户动态的采样率值。 第一传感器采样率值小于对应于高用户动态的第二传感器采样率值。 将第二MEMS传感器的采样率调整到第一传感器采样率值。
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Patent Agency Ranking
26.发明申请ATTITUDE ESTIMATION FOR PEDESTRIAN NAVIGATION USING LOW COST MEMS ACCELEROMETER IN MOBILE APPLICATIONS, AND PROCESSING METHODS, APPARATUS AND SYSTEMS 审中-公开在移动应用中使用低成本MEMS加速度计的PEDESTRIAN导航的姿态估计和处理方法，装置和系统公开(公告)号：US20140236479A1
公开(公告)日：2014-08-21
申请号：US14180488
申请日：2014-02-14
Applicant: Texas Instruments Incorporated
Inventor： Jayawardan Janardhanan , Goutam Dutta , Varun Tripuraneni
IPC: G01C21/16
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。
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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
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.
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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
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.
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公开(公告)号：US10727846B2
公开(公告)日：2020-07-28
申请号：US16582341
申请日：2019-09-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jayawardan Janardhanan , Christopher Andrew Schell , Arvind Sridhar , Sinjeet Dhanvantray Parekh
Abstract: A phase-locked loop (PLL) including a multiplexer with multiple inputs, each input coupled to receive a different reference clock. A time-to-digital converter (TDC) generates a TDC output value based on a phase difference between a reference clock from the multiplexer and a feedback clock. An averager circuit coupled to an output of the TDC. An adder circuit is coupled to outputs of the TDC and the averager circuit. A loop filter is coupled to an output of the adder circuit.
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公开(公告)号：US10686456B2
公开(公告)日：2020-06-16
申请号：US16218970
申请日：2018-12-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: A digital phase-locked loop (DPLL) includes a voltage-controlled oscillator to generate an output clock, a filter coupled to the voltage-controlled oscillator, and a time-to-digital converter (TDC) that receives a reference clock and a feedback clock. The feedback clock is derived from the output clock. The TDC generates a digital output value. The DPLL also includes a cycle slip detector circuit coupled to the TDC. The cycle slip detector circuit detects a cycle slip based on the digital output value and adjusts the digital output value by a second digital value that corresponds to an integer multiple of a period of the reference clock.
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