Electronic device and altitude calculation method

Patent metadata

Field	Value
Publication number	US-2017205232-A1
Application number	US-201715410010-A
Country	US
Kind code	A1
Filing date	Jan 19, 2017
Priority date	Jan 20, 2016
Publication date	Jul 20, 2017
Grant date	—

Abstract

An electronic device includes a barometric pressure sensor detecting a barometric pressure; a GPS sensor receiving a positioning signal from a positioning satellite; a storage unit storing a position of a way point which is a candidate of a spot used by a user and an altitude of the way point; and a processing unit calculating an altitude by using the barometric pressure, the position calculated on the basis of the positioning signal, and the position of the way point and the altitude of the way point stored in the storage unit.

First claim

What is claimed is:

1 . An electronic device, comprising:
a barometric pressure sensor detecting a barometric pressure; a receiving unit receiving a positioning signal from a positioning satellite; a storage unit storing a position of a way point which is a candidate of a spot used by a user and an altitude of the way point; and a processor calculating an altitude by using the barometric pressure, a position calculated on the basis of the positioning signal, and the position of the way point and the altitude of the way point stored in the storage unit.

2 . The electronic device according to claim 1 ,
wherein the processor extracts the way point indicating a position in a predetermined distance from the position calculated on the basis of the positioning signal from the storage unit, and calculates the altitude by using an altitude of the extracted way point.

3 . The electronic device according to claim 2 ,
wherein in a case in which a plurality of the way points are extracted, the processor calculates the altitude by using the altitude of the way point at which the distance from the position calculated on the basis of the positioning signal is minimized.

4 . The electronic device according to claim 2 ,
wherein in a case in which a plurality of the way points are extracted, the processor calculates an average value of altitudes of the plurality of extracted way points, and calculates the altitude by using the average value.

5 . The electronic device according to claim 1 ,
wherein the processor corrects the altitude by using a ground height of the electronic device.

6 . The electronic device according to claim 1 ,
wherein the processor calculates the altitude from the barometric pressure, and performs calibration of the barometric pressure sensor by using the calculated altitude and the altitude of the way point.

7 . An altitude calculation method, comprising:
detecting a barometric pressure; receiving a positioning signal from a positioning satellite; and calculating an altitude by using the barometric pressure, a position calculated on the basis of the positioning signal, and a position of a way point which is a candidate of a spot used by a user and an altitude of the way point stored in advance.

8 . The altitude calculation method according to claim 7 ,
wherein in the calculating the altitude, the way point indicating a position in a predetermined distance from the position calculated on the basis of the positioning signal is extracted from the storage unit, and the altitude is calculated by using an altitude of the extracted way point.

9 . The altitude calculation method according to claim 8 ,
wherein in the calculating the altitude, in a case in which a plurality of the way points are extracted, the altitude is calculated by using the altitude of the way point at which the distance from the position calculated on the basis of the positioning signal is minimized.

10 . The altitude calculation method according to claim 8 ,
wherein in the calculating the altitude, in a case in which a plurality of the way points are extracted, an average value of altitudes of the plurality of extracted way points is calculated, and the altitude is calculated by using the average value.

11 . The altitude calculation method according to claim 7 ,
wherein in the calculating the altitude, the altitude is calculated from the barometric pressure, and calibration of the barometric pressure sensor is performed by using the calculated altitude and the altitude of the way point.

Assignees

• Seiko Epson Corp

Inventors

• Shirai Tsubasa

Classifications

• G01S19/42

  Determining position · CPC title

• G01S19/13

  Receivers · CPC title

• G01C5/06 Primary

  by using barometric means · CPC title