CAJ | 학술논문

传感器的位置和方向对行人惯性导航的定位算法选择和定位结果有重要的影响。针对传感器位置和轴向不固定引起的步伐探测失真，引入重力轴拟合和盲源分离算法，提取出行走过程中反应脊柱运动的脊柱波。实验表明，在四种常见姿态下，以脊柱波代替单轴向加速度波进行步伐探测，可将错误率稳定在5%以下。
전감기적위치화방향대행인관성도항적정위산법선택화정위결과유중요적영향。침대전감기위치화축향불고정인기적보벌탐측실진，인입중력축의합화맹원분리산법，제취출행주과정중반응척주운동적척주파。실험표명，재사충상견자태하，이척주파대체단축향가속도파진행보벌탐측，가장착오솔은정재5%이하。
In pedestrian inertial navigation, a sensor’s position and direction have significant influence on the location algorithm’s selection and location results. In view of the pace detection distortion caused by the unfixed position and direction of the sensor, a blind source separation algorithm was investigated to extract the walking acceleration for gait detection. Firstly, the acceleration from triaxial accelerometer was processed by gravity axis fitting. Secondly, the spine wave, which reflects the acceleration of spine, was extracted by blind source separation. Experiment results show that the error rate under 5%and stronger suitability can be obtained by treating spine wave as input source of pedometer.