基于压力传感器的乘员体征识别.docVIP

基于压力传感器的乘员体征识别 Occupant Type Identification Based on Presssure Sensors 摘 要 车辆乘员类型等体征信息的准确识别是智能安全气囊系统实现的前提条件之一，其识别算法的实时性和准确性对于在碰撞发生时安全气囊的起爆时间和充气强度的控制起着决定性作用。 目前国内外研究大多是采用布置在坐椅上的压力传感器检测乘员体重，并以此进行不同体型的乘员类型分类；利用超声波雷达或计算机视觉技术检测乘员与仪表板之间的距离，并以此进行正常或危险坐姿的分类。 本文通过对不同类型乘员在不同坐姿下的体压分布信息的精确分析，提出了单纯依靠压力分布传感器，基于乘员类型及坐姿导致的体压动态变化信息进行乘员类型识别的乘员体征识别算法.首先针对乘员体压分布的特点，建立了依据体压敏感点分析的识别特征；其次，依据体压敏感点特征分析，提取了基于体压分布信息的不同类型及坐姿下乘员的主特征描述；最后，利用支持向量机的自学习功能，通过对试验采集到的大量的不同体征乘员特征样本的学习，建立了基于支持向量机的乘员类型模式分类器，实现了对不同类型乘员的有效识别，从而为后续的智能安全气囊的开发探索了一条现实可行且成本低廉的乘员类型的识别方法。 关键词：乘员体征信息;智能安全气囊;体压分布;乘员类型;支持向量机 ABSTRACT Vehicle occupant types position information accurately identify such signs is intelligence airbag system to realize one of the premise condition, the recognition algorithm for real-time and accuracy in the collision occurred airbag detonator time and inflatable intensity control decisive. Both at home and abroad, mostly in research by arrangement of pressure sensor detection chair, and based on which the crew weight of different type crew type classification; Using ultrasonic detecting radar or computer vision technology with the distance between the crew dashboard, and based on which the normal or dangerous posture classification. Based on the research with faw technology center project of different types, through the crew in different posture body pressure distribution of accurate information are analyzed, and the only depend upon the pressure distribution, based on the occupant type and sensor to sitting body pressure dynamic change information the crew types and posture identification signs recognition algorithms, first crew for occupant body pressure distribution characteristic, establishes the body pressure sensitive analysis based on recognition characteristic; Secondly, based on analysis of characteristics of the body pressure sensitive, extraction based on body pressure distribution in different types of information and under the Lord sitting description; crew Finally, usi