A direction measuring method and a direction measuring device

Japanese Patent JP6137286

B2

PROBLEM TO BE SOLVED: To obtain a bearing measurement method using a three-axis electronic compass with which it is possible to accurately measure the specific bearing of a photographing device, e.g., the bearing of the photographic optical axis of the photographing device, irrespective of the postures of the three-axis electronic compass and the photographing device that incorporates it.SOLUTION: Provided is a bearing measurement method for measuring the bearing of a specific direction to a three-axis electronic compass using the three-axis electronic compass and an inclination sensor for detecting the inclination of the three-axis electronic compass, said method having: a step for acquiring the angle of elevation formed by the specific direction and the horizontal plane, and switching, in accordance with the acquired angle of elevation, two output values to select among the three output values obtained from the three-axis electronic compass; a step for acquiring the bearing of earth magnetism from the switched two output values; a step for acquiring the bearing of the angle of rotation in the specific direction from the inclination sensor; a step for calculating, on the basis the acquired angle of elevation, bearing of earth magnetism, and angle of rotation, a deviation angle in the bearing of the specific direction that occurs due to switching.SELECTED DRAWING: Figure 8

Ota Makito

JP2015237112A

May 31, 2017

December 04, 2015

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Ricoh Imaging Co., Ltd.

G01C17/38; G01C17/04; G01C17/32; G03B17/56; H04N5/225

JP2005294931A
JP2006053081A
JP2008020296A
JP2010199971A
JP2003240553A
JP2003139536A

WO2010109536A1
US20100312510

Kunio Miura
Kuniyo Miura

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