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Acceleration transducer-based gait identification method

An acceleration sensor and identification technology, applied in the direction of sensors, human identification, medical science, etc., can solve the problems of insufficient utilization of gait acceleration signal features and small number of jobs.

Active Publication Date: 2011-11-23
浙江浙大西投脑机智能科技有限公司
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AI Technical Summary

Problems solved by technology

The number of existing works on this topic is small, and most rely on direct comparisons between average walking cycles as a general signal processing method, which underutilizes the characteristics of gait acceleration signals

Method used

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  • Acceleration transducer-based gait identification method
  • Acceleration transducer-based gait identification method
  • Acceleration transducer-based gait identification method

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Embodiment Construction

[0049] (1) use Wii Remote acquires human gait acceleration sequence Analog in Wii Remote ADXL330 Lightweight Triaxial Accelerometer. Such as figure 1 As shown, we configure five Wii Remotes on the user's right wrist, left upper arm, right waist, left thigh and right ankle respectively as wearable acceleration sensors; figure 2 As shown, all Wii Remotes are fixed on the user's body according to the direction that the top is facing above the human body, and the front is close to the human body. These five carrying parts can be used in whole, and can also be partially selected; because of the symmetry of human body walking, the carrying parts can also be interchanged left and right. The gait acceleration of different body parts of the user is collected synchronously and evenly at a frequency of 100Hz, and transmitted to the computer in real time through Bluetooth.

[0050] The acceleration relative to itself obtained by the Wii Remote has the form of a 3-dimensional vect...

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Abstract

The invention discloses an acceleration transducer-based gait identification method, which comprises the following steps: (1) acquisition of a human gait acceleration sequence; (2) walk cycle segmentation and length normalization; (3) extraction and description of key points in a gait acceleration signal sequence; (4) classification of key points; and (5) identification. The acceleration transducer-based gait identity identification method can effectively utilize key information in a human gait acceleration signal to identify a walker who wears an accelerometer.

Description

technical field [0001] The present invention relates to a gait identification method based on an acceleration sensor, in particular to a gait identification method based on an acceleration sensor, which uses key points of the signal as the characterization means of the gait acceleration sequence, and uses key point classification and classification label statistics as the framework. method. Background technique [0002] With the development of smart environments and small devices, ubiquitous computing has become an emerging concept. This concept emphasizes that computing should run through daily activities, and various personalized services should also be provided in a non-intrusive manner. One of the foundations for this is the automatic identification of users. Today, many millimeter-scale and even micron-scale miniaturized sensing devices are widely used in our daily life. In particular, acceleration sensors have been applied in fields such as human behavior recognitio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/117A61B5/11A61B5/1171
Inventor 潘纲张宇霆吴朝晖
Owner 浙江浙大西投脑机智能科技有限公司
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