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41.发明授权公开(公告)号：US11231493B2
公开(公告)日：2022-01-25
申请号：US16208306
申请日：2018-12-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Nirmal C. Warke , David P. Magee
IPC: G01S13/08 , G01S7/40 , G01S7/4865 , G01S7/4915 , G01S7/497 , G01S7/52 , G01S7/526 , G01S15/08 , G01S17/08 , G01S13/00
Abstract: An example apparatus includes a transducer to receive a reference signal and a reflected signal, the reflected signal being the reference signal after being reflected of a target; a filter to generate a band-pass reference signal and a band-pass reflected signal by filtering (A) reference signal samples associated with the reference signal and (B) reflected signal samples associated with the reflected signal; a correlator to generate a first correlation by correlating the reference signal samples with the reflected signal samples and a second correlation by correlating the band-pass reference signal with the band-pass reflected signal; and a delay estimator to determine a distance to the target based on the first correlation (coarse delay) and the second correlation (fine delay) and output a signal including the distance to the target.
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公开(公告)号：US20210325515A1
公开(公告)日：2021-10-21
申请号：US17349323
申请日：2021-06-16
Applicant: Texas Instruments Incorporated
Inventor： Nimal C. Warke , David P. Magee , Baher S. Haroun
IPC: G01S7/484 , G01S17/10 , G01S7/4865 , G01S17/36 , G01S17/42 , G01S7/4915
Abstract: An optical transmitting system for distance measuring includes a signal generator, a laser diode coupled to the signal generator, and an optics device. The signal generator is configured to generate a first plurality of electrical signals. The laser diode is configured to generate a first plurality of optical waveforms that correspond with the first plurality of electrical signals. The optics device is configured to receive the first plurality of optical waveforms and direct the first plurality of optical waveforms toward a first plurality of scan points that form a scan region within a field of view (FOV). A first signal type, a first signal duration, a first signal amplitude, or a first signal repetition frequency of the first plurality of optical waveforms is based on a first desired range of the first plurality of scan points.
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公开(公告)号：US11092674B2
公开(公告)日：2021-08-17
申请号：US15649413
申请日：2017-07-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Nirmal C. Warke , David P. Magee , Baher S. Haroun
IPC: G01S7/48 , G01S7/484 , G01S17/10 , G01S7/4865 , G01S17/36 , G01S17/42 , G01S7/4915
Abstract: An optical transmitting system for distance measuring includes a signal generator, a laser diode coupled to the signal generator, and an optics device. The signal generator is configured to generate a first plurality of electrical signals. The laser diode is configured to generate a first plurality of optical waveforms that correspond with the first plurality of electrical signals. The optics device is configured to receive the first plurality of optical waveforms and direct the first plurality of optical waveforms toward a first plurality of scan points that form a scan region within a field of view (FOV). A first signal type, a first signal duration, a first signal amplitude, or a first signal repetition frequency of the first plurality of optical waveforms is based on a first desired range of the first plurality of scan points.
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公开(公告)号：US10908287B2
公开(公告)日：2021-02-02
申请号：US15396457
申请日：2016-12-31
Applicant: Texas Instruments Incorporated
Inventor： Nirmal C. Warke , David P. Magee , Baher S. Haroun
Abstract: In described examples, an integrated circuit includes a modulator configured to modulate a driving signal for an optical transmitter with a narrow band modulation signal in which the driving signal with a fixed duration is transmitted to the optical transmitter periodically. The integrated circuit also includes a demodulator configured to receive a signal from an optical receiver that is configured to receive a reflection of light transmitted by the optical transmitter off an object, the demodulator configured to discriminate the narrow band modulation signal and estimate a distance of the object using the narrow band modulation signal.
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45.发明授权公开(公告)号：US10145948B2
公开(公告)日：2018-12-04
申请号：US15208948
申请日：2016-07-13
Applicant: Texas Instruments Incorporated
Inventor： Nirmal C. Warke , David P. Magee
Abstract: Methods and apparatus to determine a distance to a target using coarse and fine delay estimation based on a narrowband transmit signal are disclosed. An example apparatus includes a transducer to receive a reference signal and a reflected signal, the reflected signal being the reference signal after being reflected of a target; a filter to generate a band-pass reference signal and a band-pass reflected signal by filtering (A) reference signal samples associated with the reference signal and (B) reflected signal samples associated with the reflected signal; a correlator to generate a first correlation by correlating the reference signal samples with the reflected signal samples and a second correlation by correlating the band-pass reference signal with the band-pass reflected signal; and a delay estimator to determine a distance to the target based on the first correlation (coarse delay) and the second correlation (fine delay) and output a signal including the distance to the target.
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Patent Agency Ranking
公开(公告)号：US20180017678A1
公开(公告)日：2018-01-18
申请号：US15638255
申请日：2017-06-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Nirmal C. Warke , David P. Magee , Baher S. Haroun
CPC classification number: G01S17/102 , G01S7/484 , G01S7/4861 , G01S17/10 , G01S17/325 , G01S17/36 , H03F3/08
Abstract: Described examples include an integrated circuit having an analog-to-digital converter operable to receive an input signal derived from a light signal and convert the input signal to a digital received signal, the analog-to-digital converter operable to receive the input signal during at least one window. The integrated circuit further has a receiver operable to receive the digital received signal, the receiver operable to determine a distance estimate of an object from which the light signal is reflected based on the digital received signal. In an example, the window locations are chosen to correspond to the locations of maximum slope in the signal.
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公开(公告)号：US20170361360A1
公开(公告)日：2017-12-21
申请号：US15186944
申请日：2016-06-20
Applicant: Texas Instruments Incorporated
Inventor： Yunhong Li , David P. Magee , Stephen John Fedigan
CPC classification number: B08B7/028 , G02B27/0006
Abstract: Disclosed examples include ultrasonic lens cleaning systems and driver circuits to clean a lens using four or more transducer segments mechanically coupled to the lens, in which the driver circuit provides phase shifted oscillating signals to the transducer segments to generate a mechanical traveling wave rotating around the center axis of the lens to vibrate the lens for improved ultrasonic cleaning.
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公开(公告)号：US20170329010A1
公开(公告)日：2017-11-16
申请号：US15484975
申请日：2017-04-11
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Nirmal C. Warke , David P. Magee , Baher S. Haroun
IPC: G01S17/10
Abstract: Described examples include an integrated circuit that includes an encoder configured to modulate a driving signal for an optical transmitter with a plurality of encoded pulses corresponding to a code, in which the driving signal is transmitted to the optical transmitter periodically. The integrated circuit also includes a demodulator configured to receive a received signal from an optical receiver that is configured to receive a reflection of light transmitted by the optical transmitter off an object, the demodulator configured to discriminate the plurality of encoded pulses in the received signal and estimate a distance of the object.
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公开(公告)号：US20170328993A1
公开(公告)日：2017-11-16
申请号：US15485147
申请日：2017-04-11
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Nirmal C. Warke , David P. Magee , Baher S. Haroun
Abstract: Described example aspects include an integrated circuit includes a timing controller configured to select a selected time slot in a measurement period having a plurality of time slots and a transmit driver configured to provide a transmit signal in accordance with the selected time slot, in which the transmit signal is transmitted to an optical transmitter. The integrated circuit also includes a range estimator configured to receive a received signal after the selected time slot from an optical receiver that is configured to receive a reflection of light transmitted by the optical transmitter off an object, the range estimator configured to determine an estimated distance of the object based on the received signal.
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公开(公告)号：US20160134216A1
公开(公告)日：2016-05-12
申请号：US15000103
申请日：2016-01-19
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David P. Magee , Shih-Chin Yang
CPC classification number: H02P6/183 , H02P6/18 , H02P6/181 , H02P6/185 , H02P21/13 , H02P21/24 , H02P21/32
Abstract: A motor controller includes a square wave voltage generator and adding circuitry for adding the square wave voltage to a first drive voltage that is connectable to the stator windings of a motor. A current monitor for monitoring the input current to the motor as a result of the square wave voltage. A device for determining the position of the rotor based on the input current.
Abstract translation: 电动机控制器包括方波电压发生器和用于将方波电压加到可连接到电动机的定子绕组的第一驱动电压的附加电路。 电流监视器，用于监测由于方波电压而导致的电机输入电流。 一种用于基于输入电流确定转子的位置的装置。
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