公开(公告)号：EP2740256B1

公开(公告)日：2017-12-13

申请号：EP11870204.2

申请日：2011-08-04

申请人： Google LLC

发明人： YANG, Qingxuan ,  CHANG, Edward Y.

IPC分类号： H04M1/725 ,  G01C21/16 ,  G01C21/20 ,  G01C22/00

CPC分类号： G01C21/206 ,  G01C21/10 ,  G01C21/12 ,  G01C21/16 ,  G06F17/00 ,  H04M2250/12

摘要： Aspects of the present disclosure relate generally to indoor localization, for example, where GPS or other localization signals are unavailable. More specifically, aspects relate to using inertial navigation systems (132) such as accelerometers (136) and gyroscopes (134) to aid in the determination of the location of a user. Certain devices such as MEMS gyroscopes found in handheld client devices (104) should be calibrated to ensure accurate location information is obtained. In one aspect, a Vibration Energy Model process (FIG. 4B) is performed on shaking energy generated as a user walks with a mobile device to detect the direction the user is walking in. This information may be used as part of a signal fusion system to perform accurate indoor localization of the user, such as to provide enhanced maps and location services to the user.

公开(公告)号：EP2740074B1

公开(公告)日：2019-02-27

申请号：EP11870265.3

申请日：2011-08-01

申请人： Google LLC

发明人： WANG, Zhiyu ,  CHANG, Edward Y.

IPC分类号： G06K9/46

公开(公告)号：EP2856278B1

公开(公告)日：2018-08-01

申请号：EP13728594.6

申请日：2013-05-23

申请人： Google LLC

发明人： LI, Guanfeng ,  CHANG, Edward Y.

IPC分类号： G08B19/00 ,  G06F1/16 ,  G06F3/01 ,  G06F9/54 ,  G06F3/0346

CPC分类号： G08B19/00 ,  G06F1/1694 ,  G06F3/017 ,  G06F3/0346 ,  G06F9/542

摘要： Systems and methods for detecting an attitude of a device are disclosed. The system includes a processing system including at least a sensor processor and an application processor, which are distinct. The system further includes a memory system including one or more computer-readable media. The computer-readable media contains instructions that, if executed by the processing system, cause the system to perform operations. The operations include executing an application using the application processor, and receiving raw sensor readings from one or more sensors, using the sensor processor. The operations also include determining, using the sensor processor, a processed sensor metric comprising attitude data, and transmitting the processed sensor metric to the application.