公开(公告)号：US12066344B2

公开(公告)日：2024-08-20

申请号：US17163180

申请日：2021-01-29

Applicant: Apple Inc.

Inventor： Lei Wang ,  William J. Bencze ,  Kumar Gaurav Chhokra ,  Fatemeh Ghafoori ,  Stephen P. Jackson ,  Cheng Jia ,  Yi-Wen Liao ,  Glenn D. Macgougan ,  Isaac T. Miller ,  Alexandru Popovici ,  Christina Selle ,  Aditya Narain Srivastava ,  Richard Warren ,  Michael P. Dal Santo ,  Pejman Lotfali Kazemi

IPC: G01L27/00 ,  H04W4/02 ,  H04W4/38 ,  H04W4/90

CPC classification number: G01L27/005 ,  H04W4/025 ,  H04W4/38 ,  H04W4/90

Abstract: Described herein are techniques to enable a mobile device to perform multi-source estimation of an altitude for a location. A baseline altitude may be determined at ground level for a location and used to calibrate a barometric pressure sensor on the mobile device. The calibrated barometric pressure sensor can then estimate changes in altitude relative to ground level based on detected pressure differentials, allowing a relative altitude to ground to be determined. Baseline calibration for the barometric sensor calibration can be performed to determine an ambient ground-level barometric pressure.

公开(公告)号：US20210396619A1

公开(公告)日：2021-12-23

申请号：US17163180

申请日：2021-01-29

Applicant: Apple Inc.

Inventor： Lei Wang ,  William J. Bencze ,  Kumar Gaurav Chhokra ,  Fatemeh Ghafoori ,  Stephen P. Jackson ,  Cheng Jia ,  Yi-Wen Liao ,  Glenn D. Macgougan ,  Isaac T. Miller ,  Alexandru Popovici ,  Christina Selle ,  Aditya Narain Srivastava ,  Richard Warren ,  Michael P. Dal Santo ,  Pejman Lotfali Kazemi

IPC: G01L27/00 ,  H04W4/02 ,  H04W4/38 ,  H04W4/90

Abstract: Described herein are techniques to enable a mobile device to perform multi-source estimation of an altitude for a location. A baseline altitude may be determined at ground level for a location and used to calibrate a barometric pressure sensor on the mobile device. The calibrated barometric pressure sensor can then estimate changes in altitude relative to ground level based on detected pressure differentials, allowing a relative altitude to ground to be determined. Baseline calibration for the barometric sensor calibration can be performed to determine an ambient ground-level barometric pressure.

公开(公告)号：US20240385066A1

公开(公告)日：2024-11-21

申请号：US18780272

申请日：2024-07-22

Applicant: Apple Inc.

Inventor： Lei Wang ,  William J. Bencze ,  Kumar Gaurav Chhokra ,  Fatemeh Ghafoori ,  Stephen P. Jackson ,  Cheng Jia ,  Yi-Wen Liao ,  Glenn D. Macgougan ,  Isaac T. Miller ,  Alexandru Popovici ,  Christina Selle ,  Aditya Narain Srivastava ,  Richard Warren ,  Michael P. Dal Santo ,  Pejman Lotfali Kazemi

IPC: G01L27/00 ,  H04W4/02 ,  H04W4/38 ,  H04W4/90

Abstract: Described herein are techniques to enable a mobile device to perform multi-source estimation of an altitude for a location. A baseline altitude may be determined at ground level for a location and used to calibrate a barometric pressure sensor on the mobile device. The calibrated barometric pressure sensor can then estimate changes in altitude relative to ground level based on detected pressure differentials, allowing a relative altitude to ground to be determined. Baseline calibration for the barometric sensor calibration can be performed to determine an ambient ground-level barometric pressure.