Gait detection and recognition system and method based on micro-nano optical fiber composite sensing

Abstract

The invention, which relates to the field of gait detection and recognition, discloses a gait detection and recognition system and method based on micro-nano optical fiber composite sensing. The system comprises a light source module, an optical fiber coupling module, a detection demodulation module, a signal processing module, an upper computer module and a plurality of micro-nano optical fiber composite sensors. Each micro-nano optical fiber composite sensor comprises a multi-core optical fiber, a photonic crystal optical fiber and a single-mode optical fiber which are connected in sequence;a tapering area is arranged on the single-mode optical fiber; the connection position of the multi-core optical fiber and the photonic crystal optical fiber is a first collapse area; and the connection position of the photonic crystal optical fiber and the single-mode optical fiber is a second collapse area. According to the invention, the sensor can be prevented from being influenced by cross inthe measurement process, so that three-dimensional gait detection and recognition of multi-information fusion are carried out, and the measurement precision and recognition rate are effectively improved.

Description

technical field [0001] The invention relates to the field of gait detection and recognition, in particular to a gait detection and recognition system and method based on micro-nano optical fiber composite sensing. Background technique [0002] As an inherent physiological characteristic of the human body, gait can play its role in many fields such as intelligent prosthetics, intelligent monitoring, clinical medicine, rehabilitation therapy, and motion analysis. Through gait detection and recognition, the behavior of moving people can be analyzed, and then the abnormal behavior or state of special people can be tracked and detected. [0003] According to the different ways of obtaining information, the ways of recognizing gait include image recognition and motion sensor recognition. Image recognition is a recognition method based on vision. Through a series of processing of video image sequences, the identity recognition of one's own actions is realized. It is a non- Contact...

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Problems solved by technology

However, this method also does not explain how to avoid the FBG sensor being cross-affected during the measurement process, resulting in limited accuracy of the measurement results

[0011] The invention patent with the publication number CN202522352U discloses "a device for measuring plantar pressure based on fiber gratings". The device uses fiber gratings to measure plantar pressure. Cross-affected method in the method, the measurement effect is limited

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