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公开(公告)号：US20220120886A1
公开(公告)日：2022-04-21
申请号：US17478312
申请日：2021-09-17
Applicant: Texas Instruments Incorporated
Inventor： Sandeep RAO , Anand DABAK
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).
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公开(公告)号：US20160054438A1
公开(公告)日：2016-02-25
申请号：US14833916
申请日：2015-08-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sujeet Milind PATOLE , Anand DABAK , Lei DING , Murtaza ALI
Abstract: A frequency modulated continuous wave (FMCW) radar system that includes a transceiver coupled to an analog to digital converter (ADC), and a digital signal processor (DSP) coupled to the ADC. The transceiver is configured to transmit a plurality of FMCW chirps, receive a plurality of reflected FMCW chirps, and mix the plurality of reflected FMCW chirps with at least one of the FMCW chirps to generate a plurality of beat signals. The reflected FMCW chirps are the FMCW chirps after being reflected off of a target object. The ADC is configured to convert the beat signals into a plurality of digital chirps. The DSP is configured to receive the digital chirps and quantify a plurality of vibration parameters for the target object based on a comparison of phase information in a frequency domain between one of the plurality of FMCW chirps and one of the plurality of digital chirps.
Abstract translation: 包括耦合到模数转换器（ADC）的收发器和耦合到ADC的数字信号处理器（DSP）的频率调制连续波（FMCW）雷达系统。 收发器被配置为发送多个FMCW啁啾声，接收多个反射的FMCW啁啾声，并且将多个反射的FMCW啁啾与至少一个FMCW啁啾声混合以产生多个拍子信号。 反射的FMCW啁啾是从目标对象反射后的FMCW啁啾声。 ADC被配置为将拍频信号转换成多个数字线性调频脉冲。 DSP被配置为基于多个FMCW啁啾中的一个与多个数字啁啾中的一个之间的频域中的相位信息的比较来接收数字啁啾并量化用于目标对象的多个振动参数。
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公开(公告)号：US20220091216A1
公开(公告)日：2022-03-24
申请号：US17537882
申请日：2021-11-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand DABAK , Marius MOE , Charles SESTOK
Abstract: Using a phase interferometry method which utilizes both amplitude and phase allows the determination and estimation of multipath signals. To determine the location of an object, a signal that contains sufficient information to allow determination of both amplitude and phase, like a packet that includes a sinewave portion, is provided from a master device. A slave device measures the phase and amplitude of the received packet and returns this information to the master device. The slave device returns a packet to the master that contains a similar sinewave portion to allow the master device to determine the phase and amplitude of the received signals. Based on the two sets of amplitude and phase of the RF signals, the master device utilizes a fast Fourier transform or techniques like multiple signal classification to determine the indicated distance for each path and thus more accurately determines a location of the slave device.
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公开(公告)号：US20200209337A1
公开(公告)日：2020-07-02
申请号：US16232783
申请日：2018-12-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand DABAK , Marius MOE , Charles SESTOK
Abstract: Using a phase interferometry method which utilizes both amplitude and phase allows the determination and estimation of multipath signals. To determine the location of an object, a signal that contains sufficient information to allow determination of both amplitude and phase, like a packet that includes a sinewave portion, is provided from a master device. A slave device measures the phase and amplitude of the received packet and returns this information to the master device. The slave device returns a packet to the master that contains a similar sinewave portion to allow the master device to determine the phase and amplitude of the received signals. Based on the two sets of amplitude and phase of the RF signals, the master device utilizes a fast Fourier transform or techniques like multiple signal classification to determine the indicated distance for each path and thus more accurately determines a location of the slave device.
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公开(公告)号：US20200209031A1
公开(公告)日：2020-07-02
申请号：US16232138
申请日：2018-12-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
IPC: G01F1/66
Abstract: A computer-readable storage device stores machine instructions which, when executed by one or more central processing unit (CPU) cores, causes the one or more CPU cores to use a first ultrasonic transducer and a second ultrasonic transducer to measure fluid flow using a current measurement frequency and to perform a temperature calibration process. The temperature calibration process includes the sequentially generation of a plurality of electrical signals for the first ultrasonic transducer, the generated electrical signals each having a different frequency. For each frequency, the temperature calibration process includes the measurement of an amplitude of a signal from the second ultrasonic transducer. Based on the measured amplitudes of the signals from the second ultrasonic transducer, the temperature calibration process includes the determination of a new measurement frequency. The first and second ultrasonic transducers are used to measure fluid flow using the new measurement frequency.
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Patent Agency Ranking
公开(公告)号：US20250109976A1
公开(公告)日：2025-04-03
申请号：US18980123
申请日：2024-12-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand DABAK , Srinivas LINGAM
IPC: G01F1/66 , G01F1/667 , G01F1/7082 , G01F1/712 , G01F1/74 , G01N29/02 , G01N29/024 , G01N29/36 , G01N29/44
Abstract: An integrated circuit includes one or more central processing unit (CPU) cores configured to cause a first ultrasonic transducer to generate ultrasonic signals into a fluid moving in a pipe and the first or a second ultrasonic transducer to receive the ultrasonic signals from the fluid. The CPU core(s) also compute a first value indicative of at least one of a standard deviation and a time correlation based on the received ultrasonic signals. The CPU core(s) further determine a second value indicative of a volume of gas bubbles in the fluid using the computed first value indicative of the at least one of the standard deviation and time correlation.
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公开(公告)号：US20230400336A1
公开(公告)日：2023-12-14
申请号：US18449463
申请日：2023-08-14
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand DABAK , Srinivas LINGAM
IPC: G01F1/66 , G01F1/667 , G01N29/36 , G01N29/02 , G01N29/024 , G01N29/44 , G01F1/7082
CPC classification number: G01F1/66 , G01F1/667 , G01F1/662 , G01N29/36 , G01N29/02 , G01N29/024 , G01N29/4454 , G01N29/44 , G01F1/7082 , G01F1/74
Abstract: An integrated circuit includes one or more central processing unit (CPU) cores configured to cause a first ultrasonic transducer to generate ultrasonic signals into a fluid moving in a pipe and the first or a second ultrasonic transducer to receive the ultrasonic signals from the fluid. The CPU core(s) also compute a first value indicative of at least one of a standard deviation and a time correlation based on the received ultrasonic signals. The CPU core(s) further determine a second value indicative of a volume of gas bubbles in the fluid using the computed first value indicative of the at least one of the standard deviation and time correlation.
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公开(公告)号：US20240295649A1
公开(公告)日：2024-09-05
申请号：US18640669
申请日：2024-04-19
Applicant: Texas Instruments Incorporated
Inventor： Sandeep RAO , Anand DABAK
Abstract: A non-transitory computer-readable storage device stores machine instructions. When executed by one or more processors, the machine instructions cause the one or more processors to determine a first inter-chirp time with respect to a first series of chirps; and determine a second inter-chirp time with respect to a second series of chirps, in which the second inter-chirp time is different than the first inter-chirp time and is based on the first inter-chirp time and a chirp dither value. In another implementation, an oscillator receives chirp configuration signals, which contain the inter-chirp times, and generate the first and second series of chirps with the first and second inter-chirp times, respectively. Transmitter circuitry, coupled to the oscillator, transmits each of the first and second series of chirps with the respective inter-chirp time.
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公开(公告)号：US20200378811A1
公开(公告)日：2020-12-03
申请号：US16883320
申请日：2020-05-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand DABAK , Srinivas LINGAM
IPC: G01F1/66
Abstract: An integrated circuit includes one or more central processing unit (CPU) cores configured to cause a first ultrasonic transducer to generate ultrasonic signals into a fluid moving in a pipe and the first or a second ultrasonic transducer to receive the ultrasonic signals from the fluid. The CPU core(s) also compute a first value indicative of at least one of a standard deviation and a time correlation based on the received ultrasonic signals. The CPU core(s) further determine a second value indicative of a volume of gas bubbles in the fluid using the computed first value indicative of the at least one of the standard deviation and time correlation.
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公开(公告)号：US20200209388A1
公开(公告)日：2020-07-02
申请号：US16232308
申请日：2018-12-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lei DING , Srinath Mathur RAMASWAMY , Anand DABAK
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.
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