Movement distance measuring apparatus and method
AssigneesSamsung Electronics Co., Ltd., Seoul National University Industry Foundation
InventorsJae-Myeon Lee, Hyun-Su Hong, Chan-Gook Park, Jin-Won Kim, Kyong-Ha Park, Ji-Heon Oh
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Abstract
An apparatus and method for determining a location of a movement distance measuring apparatus are provided. The apparatus and method determine whether the movement distance measuring apparatus is mounted at the waist of a pedestrian or is located in a pocket and uses a different step length estimation algorithm, e.g. a different step length estimation parameter coefficient, corresponding to the determined mounting position. The determination of whether the movement distance measuring apparatus is mounted to the waist of a pedestrian or is located in a pocket is performed on the basis of a gyro sensor.
Claims9
A movement distance measuring apparatus comprising:
- an accelerometer for detecting and outputting an acceleration signal of at least one axis;
- a gyro sensor for detecting and outputting an angular speed signal of at least one axis;
- a step detection unit for detecting a step on the basis of the acceleration signal and the angular speed signal;
- a mounting position determination unit for determining a mounting position of the movement distance measuring apparatus, in which the mounting position determination unit determines that the mounting position is a pocket of a user if the step is detected on the basis of both the acceleration signal and the angular speed signal and determines that the mounting position is the waist of the user if the step is detected on the basis of only the acceleration signal;
- and
- a step length estimation unit for determining a step length by using a step length estimation algorithm that is different according to the mounting position of the movement distance measuring apparatus.
A method for measuring a movement distance of a movement distance measuring apparatus, the method comprising:
- determining whether a step is detected on the basis of an acceleration signal outputted from an accelerometer and an angular speed signal outputted from a gyro sensor;
- determining that a location of the movement distance measuring apparatus is a pocket of a user if the step is detected on the basis of both the acceleration signal and the angular speed signal and determining that the location thereof is the waist of the user if the step is detected on the basis of only the acceleration signal;
- and
- using a step length estimation algorithm that is different according to the location of the movement distance measuring apparatus.
Dependencies are inferred from the claim text.