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    ULTRASONIC FLOW METER
    31.
    发明申请
    ULTRASONIC FLOW METER 审中-公开
    超声波流量计

    公开(公告)号：US20140305215A1

    公开(公告)日：2014-10-16

    申请号：US13860409

    申请日：2013-04-10

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Anand Dabak ,  Clive Bittlestone

    IPC: G01F1/66

    CPC classification number: G01F1/66 ,  G01F1/667 ,  G01F15/061 ,  H04Q9/00 ,  H04Q2209/60

    Abstract: A flow meter ultrasonically measures fluid velocity in a pipe and ultrasonically transmits fluid flow data along the pipe. An ultrasonic transducer used for fluid velocity measurement may optionally also be used for communication of flow data, and optionally, the ultrasonic frequency for fluid velocity measurement may be the same as the ultrasonic frequency for communication of flow data.

    Abstract translation: 流量计超声波地测量管道中的流体速度，并且沿着管道超声波地传输流体流动数据。 用于流体速度测量的超声换能器还可以用于流动数据的通信，并且可选地，用于流体速度测量的超声波频率可以与用于通信流量数据的超声波频率相同。

    BANDPASS ADC SAMPLING FOR FLUID VELOCITY DETERMINATION
    32.
    发明申请
    BANDPASS ADC SAMPLING FOR FLUID VELOCITY DETERMINATION 审中-公开
    用于流体速度确定的BANDPASS ADC采样

    公开(公告)号：US20140107950A1

    公开(公告)日：2014-04-17

    申请号：US14051623

    申请日：2013-10-11

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Anand Dabak ,  Venkata Ramanan

    IPC: G01F1/66

    CPC classification number: G01F1/66 ,  G01F1/667

    Abstract: A method of calculating a time difference is disclosed. The method includes receiving a first ultrasonic signal (r21) having a first frequency from a first transducer (UT2) at a first time and receiving a second ultrasonic signal (r12) having the first frequency from a second ultrasonic transducer (UT2) at a second time. The first ultrasonic signal and the second ultrasonic signal are sampled at a second frequency (302). The first sampled ultrasonic frequency is interpolated (306). The difference in travel time between the first and second ultrasonic signals is calculated in response to the interpolated first sampled ultrasonic signal and the sampled second ultrasonic signal (equation [43]).

    Abstract translation: 公开了一种计算时差的方法。 该方法包括在第一时间从第一换能器（UT2）接收具有第一频率的第一超声信号（r21），并在第二时间从第二超声换能器（UT2）接收具有第一频率的第二超声信号（r12） 时间。 以第二频率（302）对第一超声信号和第二超声信号进行采样。 第一采样超声波频率被内插（306）。 响应于内插的第一采样超声信号和采样的第二超声信号（等式[43]）计算第一和第二超声信号之间的行进时间差。

    TOUCH-SENSITIVE INTERFACE AND METHOD USING ORTHOGONAL SIGNALING
    33.
    发明申请
    TOUCH-SENSITIVE INTERFACE AND METHOD USING ORTHOGONAL SIGNALING 有权
    触觉敏感接口和使用正交信号的方法

    公开(公告)号：US20140055413A1

    公开(公告)日：2014-02-27

    申请号：US14072080

    申请日：2013-11-05

    Applicant: Texas Instruments Incorporated

    Inventor： William R. Krenik ,  Anand Dabak

    IPC: G06F3/044

    CPC classification number: G06F3/044 ,  G06F3/0418

    Abstract: A touch screen system includes a capacitive touch screen (1) including a plurality of row conductors (7-1, 2 . . . n) and a column conductor (5-1). A plurality of cotemporaneous orthogonal excitation signals (S1(t), S2 (t) . . . Sn(t)) are simultaneously driven onto the row conductors, respectively. The capacitively coupled signals on the column conductor may be influenced by a touch (10) on the capacitive touch screen. Receiver circuitry (50) includes a sense amplifier (21-1) coupled to generate an amplifier output signal (r1(t)) in response to signals capacitively coupled onto the column conductor. WHT-based circuitry (35) determines amounts of signal contribution capacitively coupled by each of the excitation signals, respectively, to the amplifier output signal.

    Abstract translation: 触摸屏系统包括电容式触摸屏（1），其包括多个行导体（7-1,2 .n）和列导体（5-1）。 多个同时正交激励信号（S1（t），S2（t）... Sn（t））分别同时被驱动到行导体上。 列导体上的电容耦合信号可能受到电容式触摸屏上的触摸（10）的影响。 接收器电路（50）包括响应于电容耦合到列导体上的信号而耦合以产生放大器输出信号（r1（t））的读出放大器（21-1）。 基于WHT的电路（35）确定分别通过每个激励信号电容耦合到放大器输出信号的信号贡献量。

    Frequency modulated continuous wave radar system with interference mitigation
    34.
    发明授权
    Frequency modulated continuous wave radar system with interference mitigation 有权

    公开(公告)号：US11994575B2

    公开(公告)日：2024-05-28

    申请号：US17478312

    申请日：2021-09-17

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Anand Dabak

    IPC: G01S13/34 ,  G01S7/02 ,  G01S7/35

    CPC classification number: G01S13/34 ,  G01S7/021

    Abstract: A method for dithering radar frames includes determining at least one of a chirp period Tc for radar chirps in a radar frame and a chirp slope S for radar chirps in the radar frame. In response to determining the chirp period Tc, a maximum chirp dither Δc(max) is determined, and for the radar frame N, a random chirp dither Δc(N) between negative Δc(max) and positive Δc(max) is determined. In response to determining the chirp slope S, a maximum slope dither Ψ(max) is determined, and for the radar frame N, a random slope dither Ψ(N) between negative Ψ(max) and positive Ψ(max) is determined. A radar sensor circuit generates radar chirps in the radar frame N based on the at least one of (1) the chirp period Tc and the random chirp dither Δc(N) and (2) the chirp slope S and the random slope dither Ψ(N).

    Ultrasonic echo processing in presence of Doppler shift
    37.
    发明授权
    Ultrasonic echo processing in presence of Doppler shift 有权

    公开(公告)号：US11378686B2

    公开(公告)日：2022-07-05

    申请号：US16232308

    申请日：2018-12-26

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Lei Ding ,  Srinath Mathur Ramaswamy ,  Anand Dabak

    IPC: G01S17/58 ,  G01S17/93 ,  G01S7/53 ,  G01S15/58 ,  G01S15/931

    Abstract: An ultrasound detect circuit includes a decimator that decimates a transmit signal to be transmitted through an ultrasonic transducer. The transmit signal is decimated to generate first and second template signals. The decimator uses a different decimation ratio to generate the first template signal than the second template signal. The circuit also includes a first correlator to correlate a signal derived from the ultrasonic transducer with the first template signal, aa second correlator to correlate the signal derived from the ultrasonic transducer with the second template signal, and a Doppler shift determination circuit to determine a Doppler frequency shift based on an output from the first correlator and an output from the second correlator.

    Ultrasonic flow meter and excitation method
    39.
    发明授权
    Ultrasonic flow meter and excitation method 有权

    公开(公告)号：US11353347B2

    公开(公告)日：2022-06-07

    申请号：US15708553

    申请日：2017-09-19

    Applicant: Texas Instruments Incorporated

    Inventor： Anand Dabak ,  Luis Reynoso Covarrubias ,  Srinath Ramaswamy ,  Srinivas Lingam

    IPC: G01F1/66 ,  G01F15/02 ,  H04B11/00 ,  G01F1/667

    Abstract: Disclosed examples include methods and systems to measure fluid flow, including a transmit circuit to provide a transducer transmit signal based on a transmit pulse signal, a receive circuit to receive a transducer receive signal, an ADC to sample a receive signal from the receive circuit and provide a sampled signal, and a processing circuit that computes a transit time based on the sampled signal, and provides the transmit pulse signal including a first portion with a frequency in a first frequency band, and a second portion with a second frequency outside the first frequency band to mitigate undesired transducer vibration, where the second frequency is outside a transducer frequency bandwidth of the transducer.

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