A Pedestrian Indoor Localization Method Based on Step Size Matching
An indoor positioning and pedestrian technology, which is used in services based on location information, services based on specific environments, satellite radio beacon positioning systems, etc. Effect
Active Publication Date: 2020-04-17
无锡中科富创科技孵化有限公司
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Problems solved by technology
[0004] In order to overcome the insufficiency that the accuracy of the above-mentioned step size model cannot be guaranteed in the face of individual differences, the present invention provides a pedestrian indoor positioning method based on step size matching
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[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the implementation of the description Examples are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0043] The carrier of the present invention is a personal smart phone with various MEMS sensors such as a built-in accelerometer and a magnetic direction gauge.
[0044] In the outdoors, the peak method is used to detect strides. In order to improve the accuracy of detection, only the peak value exceeding the threshold of 0.4 will be jud...
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The invention discloses a pedestrian indoor positioning method based on step matching, which relates to the indoor positioning technology field. The invention mainly aims at the solution to the problem that in the study of the indoor positioning pedestrian dead reckoning (PDR) algorithm, the traditional step model does not fully reflect the individual differences and therefore, puts forward a method based on the satellite ranging and establishing an individual step characteristic database to replace the step model method. In the invention, a smart phone is used as the carrier so that the satellite ranging outdoors is applied to the measurement of step length, and a corresponding relation between different velocity characteristics and step length is established. In the room, the improved K-nearest neighbor (KNN) algorithm matches the step length in real time and calculates the current position of the pedestrian by combining the direction information. Aiming at individual differences, the invention no longer adopts a single step model, and the indoor positioning accuracy is higher than that of the traditional step model.
Description
technical field [0001] The invention relates to the technical field of indoor positioning, in particular to an indoor positioning method for pedestrians based on step size matching. Background technique [0002] With the development of economy and society and the high popularity of smart phones, location-based services have been paid more and more attention, especially in large and complex indoor environments, such as railway stations, airports, large supermarkets, hospitals and other areas, people's attention to location-based services There is an urgent need. The passive positioning method in pedestrian indoor positioning does not need to lay out signal nodes, one is to introduce the inertial navigation mechanism into the mobile device, and the other is the pedestrian dead reckoning (PDR, pedestrian dead reckoning) algorithm. [0003] The PDR algorithm calculates the number of pedestrians' walking steps, step length and direction based on the inertial sensor data, and obt...
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IPC IPC(8): H04W4/02H04W4/33G01S19/42G01B21/02
CPCG01B21/02G01S19/42H04W4/027
Inventor 钟立扬王儒敬王伟方薇屠舒妍
Owner 无锡中科富创科技孵化有限公司