Method and device for determining walking direction
A technology of traveling direction and pedestrians, which is applied in measuring devices, navigation through speed/acceleration measurement, navigation and other directions, which can solve the problems of low walking speed and unsatisfactory pedestrian detection, etc.
Active Publication Date: 2020-04-14
ALIBABA GRP HLDG LTD
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Problems solved by technology
However, the walking speed of pedestrians is relatively low, and the current GPS positioning error is usually about 10 meters. Although the error is constantly decreasing with the development of technology, it is generally not enough to detect the walking direction of pedestrians.
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[0027] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application belong to the protection scope of this application.
[0028] The inventors of the present application found in the process of implementing this application that, regarding indoor positioning, the currently commonly used solution is Bluetooth or Wi-Fi as the basic observation source, and then uses inertial positioning such as PDR (Pedestrian Dead Reckoning, Pedestrian Dead Reckoning) unit to assist in improving positioning accuracy. A more important value in PDR is the direction, and the direction is divided into the direction of travel and the direction of the terminal d...
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The embodiment of the invention discloses a walker marching direction determination method and device; a walker takes a mobile terminal device along, and the mobile terminal device is equipped with an acceleration sensor. The method comprises the steps: the acceleration sensor measures acceleration speed information of the mobile terminal device according to a first period; absolute values of acceleration speeds, obtained at a same measurement time, in three coordinate axis directions are added to obtain the acceleration speed added value, and with the time as an independent variable and the acceleration speed added value as a dependent variable, a first function is generated; time points of crests and troughs of a first function corresponding wave shape are determined; and the linear acceleration speeds at the time points of the adjacent crests and troughs are added to be converted into the angle, and an included angle between the marching direction and the mobile terminal device is determined according to the angle. Through the embodiment of the invention, the sensor arranged on the mobile terminal device can be used, and the marching direction of the walker can be calculated relatively accurately.
Description
technical field [0001] The present application relates to the technical field of indoor positioning, in particular to a method and a device for determining a walking direction of a pedestrian. Background technique [0002] Terminal device motion trajectory detection has a wide range of applications in many scenarios, such as navigation. Navigation in the prior art generally occurs during driving, by detecting the movement trajectory of the terminal device to determine whether its traveling direction deviates from the recommended route, and so on. Usually, this kind of motion track detection can be formed by connecting various historical position points obtained by GPS (Global Positioning System, Global Positioning System) positioning. [0003] At present, in some applications, indoor positioning is required. In this environment, users generally walk on foot. That is to say, at this time, pedestrians need to be positioned. direction of travel etc. However, the walking spee...
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IPC IPC(8): G01C21/20G01C21/16
CPCG01C21/16G01C21/206
Inventor 沈慧吴剑姚云蛟
Owner ALIBABA GRP HLDG LTD