公开(公告)号：US20200322753A1

公开(公告)日：2020-10-08

申请号：US16910017

申请日：2020-06-23

Applicant: GOOGLE LLC

Inventor： Patrick Robertson ,  Brian Williams ,  Maria Jesus Garcia Puyol ,  Etienne Le Grand ,  Mohammed Khider ,  Luigi Bruno

IPC: H04W4/02 ,  H04B17/318 ,  G01C5/06 ,  G01C21/08 ,  G01C21/00 ,  G01S11/06 ,  G01S5/02 ,  G01S19/46 ,  H04B17/27 ,  G01S19/45

Abstract: To calibrate a device, a system receives an indication of current weather conditions at a geographic area, obtains, from a database, elevation data for the geographic area, and generating expected measurements of atmospheric pressure at the geographic area using the indication of weather conditions and the elevation data for the geographic area. The system then causes at least one mobile device located in the geographic area and equipped with a barometer to calibrate the barometer using the expected measurements of atmospheric pressure.

公开(公告)号：US10694325B2

公开(公告)日：2020-06-23

申请号：US15844384

申请日：2017-12-15

Applicant: GOOGLE LLC

Inventor： Patrick Robertson ,  Brian Williams ,  Maria Jesus Garcia Puyol ,  Etienne Le Grand ,  Mohammed Khider ,  Luigi Bruno

IPC: H04W4/02 ,  H04B17/318 ,  G01C5/06 ,  G01C21/08 ,  G01S11/06 ,  G01S5/02 ,  G01S19/46 ,  H04B17/27 ,  G01C21/00 ,  G01S19/45 ,  G01S19/48 ,  H04W84/12 ,  G01C21/20

Abstract: Positioning mobile devices in a three-dimensional space includes receiving multiple traces, each trace corresponding to a sequence of atmospheric pressure readings from a respective mobile device, receiving indications of signals received by the mobile devices from signal sources concurrently with the atmospheric pressure readings, generate similarity metrics for the multiple traces using the indications of other signals received by the mobile devices, the similarity metrics being indicative of associations between the signal sources and the atmospheric pressure readings, and determine estimated changes in elevation over time for the multiple traces using the generated similarity metrics.

公开(公告)号：US20180255431A1

公开(公告)日：2018-09-06

申请号：US15844384

申请日：2017-12-15

Applicant: GOOGLE LLC

Inventor： Patrick Robertson ,  Brian Williams ,  Maria Jesus Garcia Puyol ,  Etienne Le Grand ,  Mohammed Khider ,  Luigi Bruno

IPC: H04W4/02 ,  H04B17/318 ,  G01C5/06 ,  G01S11/06 ,  G01C21/08 ,  G01C21/00

Abstract: Positioning mobile devices in a three-dimensional space includes receiving multiple traces, each trace corresponding to a sequence of atmospheric pressure readings from a respective mobile device, receiving indications of signals received by the mobile devices from signal sources concurrently with the atmospheric pressure readings, generate similarity metrics for the multiple traces using the indications of other signals received by the mobile devices, the similarity metrics being indicative of associations between the signal sources and the atmospheric pressure readings, and determine estimated changes in elevation over time for the multiple traces using the generated similarity metrics.