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公开(公告)号：US10908414B2
公开(公告)日：2021-02-02
申请号：US15591311
申请日：2017-05-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: An apparatus includes a mass detection circuit coupled to a surface covered with a plurality of electrodes. The mass detection circuit is configured to detect a mass of a first droplet present on the surface. The apparatus further includes a transducer circuit coupled to a transducer, which is coupled to the surface and form a lens unit. The transducer circuit configured to excite a first vibration of the surface at a resonant frequency to form a high displacement region on the surface. The apparatus also includes a voltage excitation circuit coupled to the plurality of electrodes. In response to the detection of the mass of the first droplet, the voltage excitation circuit is configured to apply a sequence of differential voltages on one or more consecutive electrodes which moves the first droplet to the high displacement region.
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公开(公告)号：US10893815B2
公开(公告)日：2021-01-19
申请号：US16271246
申请日：2019-02-08
Applicant: Texas Instruments Incorporated
Inventor： Tarkesh Pande , David Patrick Magee
Abstract: A method for heart rate measurement in a photoplethysmograph (PPG) heart rate monitor device is provided that includes performing motion compensation on a PPG signal wherein a motion compensated PPG signal PPGaccX is generated with reference to an X-axis acceleration signal, a motion compensated PPG signal PPGaccY is generated with reference to a Y-axis acceleration signal, and a motion compensated PPG signal PPGaccZ is generated with reference to a Z-axis acceleration signal, combining PPGaccX, PPGaccY, and PPGaccZ to generate a final motion compensated PPG signal, wherein a first weight is applied PPGaccX, a second weight is applied to PPGaccY, and a third weight is applied to PPGaccZ, performing a single Fourier Transform (FT) on the final motion compensated PPG signal to generate a frequency domain PPG signal; and estimating a heart rate based on the frequency domain PPG signal.
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公开(公告)号：US20200324324A1
公开(公告)日：2020-10-15
申请号：US16915704
申请日：2020-06-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Stephen John Fedigan
IPC: B08B7/02 , G01N29/036 , H01L41/04 , G01N29/02 , B60S1/56 , G01K13/00 , G01N29/34 , G01R31/34 , H01L41/09
Abstract: In a method of expelling contaminants from a sensor, a change is measured in a resonant frequency of a sensor assembly to detect contaminants on a surface of the sensor assembly. A change is measured in a frequency response of the sensor assembly to determine a presence and an amount of the contaminants on the surface. A cleaning mode is determined based on an amount of the contaminants on the surface. A cleaning is determined phase based on the amount of the contaminants on the surface. A cleaning control signal is provided to an actuator of the sensor assembly to expel the contaminants from the surface.
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公开(公告)号：US10663418B2
公开(公告)日：2020-05-26
申请号：US15887923
申请日：2018-02-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Stephen John Fedigan
Abstract: In described examples, one or more devices include: apparatus including a lens element and a transducer to vibrate the lens element at an operating frequency when operating in an activated state; and controller circuitry. The controller circuitry is arranged to measure an impedance of the apparatus, to determine an estimated temperature of the apparatus in response to the measured impedance, to compare the estimated temperature against a temperature threshold for delineating an operating temperature range of the apparatus, and to toggle an activation state of the transducer in response to comparing the estimated temperature against the temperature threshold.
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公开(公告)号：US20200153374A1
公开(公告)日：2020-05-14
申请号：US16740517
申请日：2020-01-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (θ) 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.
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Patent Agency Ranking
公开(公告)号：US10591720B2
公开(公告)日：2020-03-17
申请号：US15377492
申请日：2016-12-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
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.
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公开(公告)号：US20180246323A1
公开(公告)日：2018-08-30
申请号：US15903569
申请日：2018-02-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
CPC classification number: G02B27/0006 , B08B7/02 , B60S1/56
Abstract: In described examples, a transducer vibrates a lens element at a first frequency and a different second frequency. Controller circuitry selects one of a cleaning mode and a heating mode in response to an estimated temperature of the lens element. The controller circuitry activates the transducer to vibrate the lens element at the first frequency in response to the controller circuitry selecting the cleaning mode. The controller circuitry activates the transducer to vibrate the lens element at the second frequency in response to the controller circuitry selecting the heating mode.
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公开(公告)号：US20180243804A1
公开(公告)日：2018-08-30
申请号：US15907125
申请日：2018-02-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Stephen John Fedigan
CPC classification number: B08B7/028 , B08B7/0064 , B08B7/04 , B60S1/56 , G02B27/0006
Abstract: In described examples, a transducer vibrates a lens element in a heating mode and a cleaning mode. Controller circuitry activates the transducer in the heating mode in response to an estimated temperature, and activates the transducer in the cleaning mode after the transducer is activated in the heating mode.
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公开(公告)号：US20180224385A1
公开(公告)日：2018-08-09
申请号：US15887923
申请日：2018-02-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Stephen John Fedigan
CPC classification number: G01N27/028 , B06B1/0292 , B06B1/0644 , G01K7/16 , G05B1/03 , G05D23/1917 , H03K7/08
Abstract: In described examples, one or more devices include: apparatus including a lens element and a transducer to vibrate the lens element at an operating frequency when operating in an activated state; and controller circuitry. The controller circuitry is arranged to measure an impedance of the apparatus, to determine an estimated temperature of the apparatus in response to the measured impedance, to compare the estimated temperature against a temperature threshold for delineating an operating temperature range of the apparatus, and to toggle an activation state of the transducer in response to comparing the estimated temperature against the temperature threshold.
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90.发明申请公开(公告)号：US20180117642A1
公开(公告)日：2018-05-03
申请号：US15497624
申请日：2017-04-26
Applicant: Texas Instruments Incorporated
Inventor： David Patrick Magee , Stephen John Fedigan
Abstract: Lens cleaning systems, drivers and methods to detect faults or degradation in a lens cleaning system, including a controller to control a lens transducer drive signal frequency to vibrate the lens in a frequency range of interest and measure frequency response values according to driver feedback signals, and to compare the measured frequency response values to baseline frequency response values for a healthy system, and to selectively determine the existence of a fault or degradation in the lens cleaning system according to dissimilarities between the measured frequency response values and the baseline frequency response values.
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