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Step counting method

A technology of step counting and combined acceleration, which is applied in the field of measurement technology and sensor data processing, can solve the problems of no data preprocessing digital filtering and limited noise suppression effect, and achieve the goal of improving the step counting effect, accurate step counting, and eliminating glitches Effect

Active Publication Date: 2015-03-11
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0007] All of the above solutions can realize step counting based on the acceleration sensor of the portable device. However, these step counting methods do not perform data preprocessing or only simple digital filtering on the collected acceleration data, and the suppression effect on noise is limited, which leads to The step counting effect is easily affected by the accelerometer wearing position, personal walking habits and other factors

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Embodiment Construction

[0035] In order to make the present invention clearer, it will be further elaborated below in conjunction with the accompanying drawings and preferred embodiments.

[0036] figure 1 A flow chart of a step counting method according to an embodiment of the present invention is shown, and the step counting method is based on two modes, namely the frequency selective filter step counting mode and the adaptive filter step counting mode. At the beginning of step counting, a frequency selective filter is used for step counting, and the combined acceleration passes through a frequency selective filter filter (such as an FIR bandpass filter) with a preset filter coefficient to suppress noise interference. At the same time, the adaptive filter coefficients are trained by using the collected acceleration data. After walking for a period of time (for example, 50 steps, depending on the sampling frequency, it is required that there are enough sampling points to meet the training requireme...

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Abstract

The invention provides a step counting method which comprises the following steps: 1), obtaining resultant acceleration data within a period of time according to a data window, wherein the data window continuously translates in the forward direction on a timer shaft; 2), using a self-adapting filter for filtering the resultant acceleration data in a current data window, wherein self-adaptation training is performed on the filter coefficient of the self-adapting filter according to the resultant acceleration data in the current data window; 3), performing step counting according to the filtered resultant acceleration data in the current data window. The step counting method can provides relatively accurate step counting results timely.

Description

technical field [0001] The invention relates to measurement technology and sensor data processing technology, in particular, the invention relates to a step counting method. Background technique [0002] With the improvement of people's living standards, people pay more and more attention to their health. The pedometer can detect people's walking steps, help people grasp the exercise situation in real time, so as to formulate a reasonable health plan. In recent years, the increasing functions of smart phones have made them more and more widely used in modern life, and it is not uncommon to use embedded sensors in portable devices such as mobile phones to develop pedometers. [0003] For example: the Chinese patent application with the publication number CN201410183644 proposes a method for counting steps based on an acceleration sensor. Each stage uniquely corresponds to a state in the state machine, so that the walking process of a person corresponds to the state transiti...

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Application Information

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IPC IPC(8): G01C22/02
CPCG01C22/006
Inventor 董理骅刘强黄希赵泽崔莉
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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