Pedestrian step length detection method, pedestrian step length detection apparatus and pedestrian step length detection system

Abstract

The invention relates to a pedestrian step length detection method, a pedestrian step length detection apparatus and a pedestrian step length detection system. The pedestrian step length detection method comprises: detecting the peak value of longitudinal acceleration data, and setting an area between the two adjacent peak values as a step interval; carrying out integral on the longitudinal acceleration data within one step interval to obtain velocity data, wherein the velocity value of the integral starting point is taken as zero; carrying out integral on the velocity data to obtain a longitudinal displacement; taking the maximum value and the minimum value of the longitudinal displacement within the step interval, and obtaining a longitudinal displacement amplitude value by subtracting the minimum value from the maximum value; and according to the longitudinal displacement amplitude value, obtaining the step length data of the user within the step interval by using a preset step length calculation model. With the method, the apparatus and the system of the present invention, the step length data detection precision is improved, and the precise basis data is provided for indoor navigation and positioning.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to a method and device for detecting pedestrian walking tracks. Background technique [0002] With the popularization of smart mobile terminals (mobile phones, computers, wearable devices, etc.) and the development of the mobile Internet, applications based on location awareness are proliferating, and the demand for location services is also increasing day by day. At present, GPS-based outdoor positioning / navigation technology has been very mature and widely used. [0003] Traditional GPS positioning and navigation is difficult to assume the role of indoor positioning due to poor indoor signals. Therefore, at present, indoor positioning / navigation often uses methods based on geomagnetism, wireless signal (Bluetooth, WIFI, mobile communication signal, etc.) fingerprints, and inertial guidance. , these techniques usually have shortcomings such as too low accuracy or expens...

AI Technical Summary

Problems solved by technology

Based on the PDR technology, the defects in the prior art can be solved, but there is a large error in the output signal of the accelerometer, especially a large drift error will occur over time, because there is no reasonable mathematical model and effective error correction for PDR , so that the step size based on PDR technology measurement is prone to accumulated errors, resulting in a decrease in positioning accuracy

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