公开(公告)号：US20220057498A1

公开(公告)日：2022-02-24

申请号：US16999179

申请日：2020-08-21

Applicant: Chirp Microsystems, Inc.

Inventor： Agnes DUVAL ,  Joe YOUSSEF

IPC: G01S7/527 ,  G01S15/42 ,  G01S7/539

Abstract: A device comprises a processor coupled with an ultrasonic transducer which is configured to emit an ultrasonic pulse and receive corresponding returned signals associated with a distance range of interest in a field of view of the ultrasonic transducer. The processor is configured to: remove a low frequency component from the returned signals to achieve modified returned signals; calculate, from the modified returned signals, a variation in amplitude; determine a quantification of the variation in amplitude for a first subset of the modified returned signals associated with a first subrange of the distance range of interest; employ the quantification to correct for changes in the first subset to achieve first normalized sensor data for the first subrange, where the first normalized sensor data is sensitive to occurrence of change over time in the first subrange; and detect a moving object in the first subrange using the first normalized sensor data.

公开(公告)号：US20210156993A1

公开(公告)日：2021-05-27

申请号：US16836669

申请日：2020-03-31

Applicant: Chirp Microsystems, Inc.

Inventor： James Alexander GORDON ,  David HORSLEY ,  Sebastien RICCARDI

IPC: G01S15/50 ,  A47L11/30 ,  A47L11/40 ,  G01S7/52

Abstract: A robotic cleaning appliance includes a housing, surface treatment item, surface type detection sensor, and processor. The sensor emits sonic signals toward a surface being traversed and receives corresponding returned signals from the surface. The returned signals are used for surface type detection and include directly reflected primary returned signals and multi-path reflected secondary returned signals which return at a later time than the primary returned signals. The processor selects a window of time after transmission of a sonic signal such that the returned signals in the window comprise at least a portion of the secondary returned signals, wherein the window is related to round trip time-of-flight of the returned signals; processes the returned signals falling in the window to achieve a reflectivity metric; compares the reflectivity metric to a stored value; and based on the comparison, determines which surface type of a plurality of surface types has been detected.

公开(公告)号：US11016167B2

公开(公告)日：2021-05-25

申请号：US16463321

申请日：2017-11-20

Applicant: Chirp Microsystems, Inc.

Inventor： Richard J. Przybyla ,  Mitchell H. Kline ,  David A. Horsley

IPC: G01S5/26 ,  G01S5/02 ,  G01S5/00 ,  G01S5/30 ,  G01S5/18 ,  G01S11/16 ,  H04W56/00 ,  G06F3/00 ,  G06K9/00

Abstract: A tracking method includes displaying visual content on a screen of a head mounted display (HMD). One or more base stations may be stationary with respect to the screen while the visual content is being displayed. In contrast, one or more objects may move with respect to the screen while the visual content is being displayed. Time-difference-of-arrival (TDoA) and/or time-of-flight (ToF) may be measured for one or more ultrasonic pulses transmitted from the base station, one or more objects, or HMD. Position and orientation of the objects and HMD may be calculated based on the TDoA and ToF. Different frequencies of pulses may be used to locate the HMD and the objects. An electromagnetic synchronization signal from the HMD and/or base station may be used to measure TDoA. Position and orientation measurements may be fused with outputs from IMUS (inertial measurement units) to reduce jitter.

公开(公告)号：US20200266798A1

公开(公告)日：2020-08-20

申请号：US16794099

申请日：2020-02-18

Applicant: Chirp Microsystems, Inc.

Inventor： Stefon Shelton ,  Andre Guedes ,  Richard Przybyla ,  Meng-Hsiung Kiang ,  David Horsley

IPC: H03H9/17 ,  H01L41/187 ,  H04R17/00 ,  H01L41/09 ,  H03H9/02 ,  B06B1/06

Abstract: A transducer includes first and second piezoelectric layers made of corresponding different first and second piezoelectric materials and three or more electrodes, implemented in two or more conductive electrode layers. The first piezoelectric layer is sandwiched between a first pair of electrodes and the second piezoelectric layer is sandwiched between a second pair of electrodes. The first and second pairs of electrodes contain no more than one electrode that is common to both pairs.

公开(公告)号：US10700792B2

公开(公告)日：2020-06-30

申请号：US15920300

申请日：2018-03-13

Applicant: Chirp Microsystems, Inc.

Inventor： Richard Przybyla ,  Mitchell Kline ,  David Horsley

IPC: H04L29/00 ,  H04B11/00 ,  B06B1/02 ,  G01S7/523 ,  G06F8/65 ,  H04L9/08 ,  H04L9/30 ,  H04L29/08 ,  H04W12/02 ,  H04L27/34 ,  H04W88/02

Abstract: An ultrasonic transceiver system includes a transmitter block, a receiver block, a state machine, a computer unit. The transmitter block contains circuitry configured to drive an ultrasound transducer. The receiver block contains circuitry configured to receive signals from the ultrasound transducer and convert the signals into digital data. The state machine is coupled to the transmitter and receiver blocks and contains circuitry configured to act as a controller for those blocks. The computing unit is coupled to the transmitter block, the receiver block, and the state machine and is configured to drive the transmitter block and process data received from the receiver block by executing instructions of a program. The program memory is coupled to the computing unit and is configured to store the program. The computing unit is configured to be reprogrammed with one or more additional programs stored in the program memory.

公开(公告)号：US20170236506A1

公开(公告)日：2017-08-17

申请号：US15583861

申请日：2017-05-01

Applicant: Chirp Microsystems, Inc.

Inventor： Richard Przybyla ,  Andre Guedes ,  Stefon Shelton ,  Meng-Hsiung Kiang ,  David Horsley

IPC: G10K11/00 ,  G01S15/10 ,  G01S7/521 ,  G10K11/34

CPC classification number: G10K11/002 ,  G01S7/521 ,  G01S15/10 ,  G10K11/346 ,  H04R3/04 ,  H04R17/00 ,  H04R29/002 ,  H04R29/005 ,  H04R2201/003 ,  H04R2217/03

Abstract: A system and method use an array of ultrasonic transducers to emit and receive sound in a phased array fashion by using acoustic waveguides to achieve a desired acoustic radiation and reception pattern. A chip package attached to an acoustic transducer array includes acoustic waveguides coupled to acoustic ports. Each waveguide is coupled between a corresponding acoustic transducer and a corresponding acoustic port. A spacing of a pair of acoustic ports is different than a spacing of a corresponding pair of acoustic transducers.

公开(公告)号：US11209541B1

公开(公告)日：2021-12-28

申请号：US16999238

申请日：2020-08-21

Applicant: Chirp Microsystems, Inc.

Inventor： Florence Gris ,  Agnes Duval

IPC: G01S15/10

Abstract: A device comprises a processor coupled with an ultrasonic transducer coupled which is configured to emit an ultrasonic pulse and receive returned signals received after a ringdown period of the transducer and corresponding to the emitted ultrasonic pulse. The processor is configured to evaluate the returned signals to find a candidate echo, from an object located in a ringdown blind spot area, in a time window between one and two times the ringdown period; locate multiple echoes from the object of higher order than the candidate echo; validate the candidate echo as at least a secondary echo associated of the object; and determine, based on analysis of the returned signals, an estimated distance from the transducer to the object in the ringdown blind spot area, wherein the ringdown blind spot area is located between the transducer and a closest distance at which objects can be sensed by the transducer.

公开(公告)号：US20210215786A1

公开(公告)日：2021-07-15

申请号：US17216146

申请日：2021-03-29

Applicant: Chirp Microsystems, Inc.

Inventor： Richard J. Przybyla ,  Sebastien Riccardi ,  Benoît Lachal

IPC: G01S3/808 ,  G01S5/30 ,  G01S15/87

Abstract: A method, system and computer readable medium for Ultrasound contact tracing comprising receiving one or more advertise messages determining a base station from the one or more advertise messages wherein the base station generates a broadcast order from at least the one or more advertise messages. A broadcast order is determined and an ultrasound message is sent according to the broadcast order. A detection period for ultrasound messages is initiated according to the broadcast order and a user may be notified of a detected ultrasound message.

公开(公告)号：US10816639B2

公开(公告)日：2020-10-27

申请号：US16773691

申请日：2020-01-27

Applicant: Chirp Microsystems, Inc.

Inventor： Richard J. Przybyla ,  David A. Horsley ,  Mitchell H. Kline

IPC: G01S5/00 ,  G06F3/00 ,  G01S5/26 ,  H04W56/00 ,  G01S5/02 ,  G01S5/30 ,  G01S5/18 ,  G01S11/16

Abstract: A tracking method is disclosed. The method may include displaying visual content on a screen. A base station may be stationary with respect to the screen while the visual content is being displayed. In contrast, one or more objects may move with respect to the screen while the visual content is being displayed. The one or more objects may be tracked so that the movement thereof may be used to alter the visual content. Such tracking may involve the base station and the one or more objects sending and/or receiving one or more ultrasonic pulses. Time-difference-of-arrival and/or time-of-flight of the one or more ultrasonic pulses may then be used to estimate a relative location and/or a relative orientation of the one or more objects with respect to the base station in three dimensional space.

公开(公告)号：US20180248477A1

公开(公告)日：2018-08-30

申请号：US15958415

申请日：2018-04-20

Applicant: Chirp Microsystems, Inc.

Inventor： Mitchell Kline ,  Richard Przybyla ,  David Horsley

IPC: H02M3/07 ,  B06B1/02 ,  H02M7/483 ,  H02M1/36

CPC classification number: H02M3/07 ,  B06B1/0207 ,  H02M1/08 ,  H02M1/36 ,  H02M7/483 ,  H02M2001/0048 ,  H02M2001/007 ,  Y02B70/1491

Abstract: An ultrasound transducer may be driven by a driver circuit having one or more charge pumps and a multi-level inverter. The one or more charge pumps are configured to drive the ultrasound transducer only during output transitions of the inverter.