北京生物醫(yī)學(xué)工程

基于無(wú)線傳感器技術(shù)的人體步態(tài)跟蹤系統(tǒng)研制

Human Gait Tracing System Based on Wireless Sensor Network

作者：李聲飛吳寶明

單位：重慶大學(xué)通信工程學(xué)院（重慶400040）

關(guān)鍵詞：加速度；步態(tài)跟蹤；無(wú)線傳感器網(wǎng)絡(luò)；卡爾曼濾波算法；健康監(jiān)護(hù)

分類號(hào)：

出版年·卷·期（頁(yè)碼）：2010·29·2（154-161）

摘要：

設(shè)計(jì)了一套基于無(wú)線傳感器網(wǎng)絡(luò)技術(shù)的人體步態(tài)跟蹤系統(tǒng)。首先在測(cè)試者腿部佩戴傳感器節(jié)點(diǎn)實(shí)時(shí)采集運(yùn)動(dòng)加速度數(shù)據(jù)，通過(guò)傳感器網(wǎng)絡(luò)將數(shù)據(jù)發(fā)給PC機(jī)進(jìn)行數(shù)據(jù)處理。PC機(jī)上采用卡爾曼濾波算法估計(jì)腿部運(yùn)動(dòng)狀態(tài)向量(彎曲角度、擺動(dòng)速度、水平/垂直加速度)，從而建立運(yùn)動(dòng)模型實(shí)時(shí)跟蹤人體步態(tài)運(yùn)動(dòng)。初步試驗(yàn)結(jié)果表明，系統(tǒng)能夠準(zhǔn)確地跟蹤人體運(yùn)動(dòng)步態(tài)，具有準(zhǔn)確性高、使用方便、可擴(kuò)展性好和性價(jià)比高等優(yōu)點(diǎn)，可廣泛應(yīng)用于人體運(yùn)動(dòng)功能康復(fù)評(píng)價(jià)等領(lǐng)域。

To design a human gait tracking system, which was based on wireless sensor technology. The acceleration sensor node wearing on the experimenter’s thigh, was responsible for collecting activity acceleration data, which then was transmitted the data to PC through wireless sensor network. By means of the pe software, the Kalman filter algorithm was adopted to estimate experimenter’s thigh motion vectors(bend angle, swing speed, horizontal/vertical acceleration), thus the motion model was established for tracing body gait activity. Preliminary experiments showed that this system was able to trace body gait accurately with the advantages of highaccuracy, convenience, good scalability and high performanceprice ration. Furthermore the system could be widely used in the application of evaluating movement function recovery.

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