公开(公告)号：US20180224656A1

公开(公告)日：2018-08-09

申请号：US15696752

申请日：2017-09-06

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： STEPHEN JOHN FEDIGAN ,  DAVID PATRICK MAGEE

IPC: G02B27/00 ,  H04N5/225

CPC classification number: G02B27/0006 ,  H04N5/2252

Abstract: An apparatus for mitigating contamination of an optical device comprises an open-topped, closed-sided, and closed -bottomed housing cup partially defining a protected volume to enclose the optical device. A housing cap encloses a top of the housing cup and partially defines the protected volume. The housing cap includes a top collar having an open central aperture. The top collar includes at least one drain channel extending longitudinally downward into a top collar top surface and extending across the top collar top surface laterally outward from the central aperture. A top cover laterally spans the central aperture of the top collar. An interface structure circumscribes the top cover to suspend the top cover downwardly into the housing cup from the top collar. The interface structure prevents direct contact between the top cover and the top collar.

公开(公告)号：US20170371154A1

公开(公告)日：2017-12-28

申请号：US15377492

申请日：2016-12-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： STEPHEN JOHN FEDIGAN ,  DAVID PATRICK MAGEE

IPC: G02B27/00 ,  G03B17/02

CPC classification number: G02B27/0006 ,  G03B17/02 ,  G03B17/08

Abstract: An apparatus for mitigating contamination of an optical device comprises an open-topped, closed-sided, and closed-bottomed housing cup partially defining a protected volume to enclose the optical device. A housing cap encloses a top of the housing cup and partially defines the protected volume. The housing cap includes a top collar having an open central aperture. A top cover laterally spans the central aperture of the top collar. An interface structure circumscribes the top cover to suspend the top cover downwardly into the housing cup from the top collar. The interface structure prevents direct contact between the top cover and the top collar.

公开(公告)号：US20160334250A1

公开(公告)日：2016-11-17

申请号：US14866779

申请日：2015-09-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： AMARDEEP SATHYANARAYANA ,  ANAND G. DABAK ,  DAVID PATRICK MAGEE

IPC: G01F1/66

Abstract: A method of calculating a time difference is disclosed. The method includes receiving a first signal, determining a first envelope of the first signal, and determining a first time the first envelope crosses a threshold. The method further includes receiving a second signal, determining a second envelope of the second signal, and determining a second time the second envelope crosses the threshold. The time difference is calculated between the first and second times.

Abstract translation: 公开了一种计算时差的方法。 该方法包括：接收第一信号，确定第一信号的第一包络，以及确定第一包络线跨越阈值的第一时间。 所述方法还包括接收第二信号，确定所述第二信号的第二包络，以及确定所述第二包络通过所述阈值的第二时间。 时间差在第一次和第二次之间计算。

公开(公告)号：US20160087568A1

公开(公告)日：2016-03-24

申请号：US14721786

申请日：2015-05-26

Applicant: Texas Instruments Incorporated

Inventor： ERIC JAMES THOMAS ,  DAVID PATRICK MAGEE

IPC: H02P21/14 ,  H02P21/00

CPC classification number: H02P21/18 ,  H02P21/24 ,  H02P25/03 ,  H02P27/08

Abstract: A method of determining angular position (A) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.

Abstract translation: 一种确定N相永磁电动机（PMM）的转子的角位置（A）的方法。 具有相关联的存储的角位置确定（APD）算法的处理器被编程为实现该算法以使相关联的电动机控制器执行包括一次强制一个向量的一个向量的电流或电压矢量的相位矢量集合到绕组的定子端子的步骤 N相是正和负幅度矢量，其中矢量幅度足够小以至不移动转子，并且强制电流或电压矢量的持续时间基本上是恒定的。 对于每个电流或电压矢量测量得到的定子电流或电压电平。 通过产生的定子电流电平或所得到的定子电压电平的叠加产生N维电流矢量或电压矢量。 使用N维电流矢量或电压矢量来确定角位置。