汽车碰撞试验假人零部件质心测量方法及装置
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摘要
假人质心位置是汽车碰撞试验所需要保证的重要参数。该文提出了一种汽车碰撞试验假人零部件质心坐标的测量方法。根据力矩平衡原理,采用间接测量结果不确定度的估计方法 ,对测量方法进行了理论误差分析。用该测量方法及单片机技术,设计并制作了一台能直接显示假人零部件质心坐标的测量装置,并进行了试验验证。结果表明:测量精度与所测部件的质量及3个传感器的支撑点之间的距离相关。调整3个测力点之间的距离,可提高测量精度。该测量装置操作方便;传感器的支撑点间距为200 mm工况下,质心测量精度70μm,而最大理论误差29μm。
Proposed a method to measure the gravity center of vehicle crash test dummy parts, because the position of gravity center is an important parameter that needs be guarantee. Used an estimation method of uncertainty estimation in indirect measurement based on the moment balance principle to analyze the measurement error. Designed and manufactured a device to measure and display the gravity center of crashtest dummy-parts directly based on single chip microcomputer technology. Tests validated the accuracy of the device. The results show that the measurement accuracy is related to the mass of dummy parts and the distance between 3 supporting points. The device is easy to operate with a gravity-center measuring-precision of 70 μm at a 200 mm distance between the supporting points of sensors, while the maximum theoretical error of this method is 29 μm.
Proposed a method to measure the gravity center of vehicle crash test dummy parts, because the position of gravity center is an important parameter that needs be guarantee. Used an estimation method of uncertainty estimation in indirect measurement based on the moment balance principle to analyze the measurement error. Designed and manufactured a device to measure and display the gravity center of crashtest dummy-parts directly based on single chip microcomputer technology. Tests validated the accuracy of the device. The results show that the measurement accuracy is related to the mass of dummy parts and the distance between 3 supporting points. The device is easy to operate with a gravity-center measuring-precision of 70 μm at a 200 mm distance between the supporting points of sensors, while the maximum theoretical error of this method is 29 μm.
引文
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[3]Yoganandan N,Pintar F A,Zhang J,et al.Physical properties of the human head:mass,center of gravity and moment of inertia[J].J Biomechanics,2009,42(9):1177-1192.
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[5]陈玉忠,尹彦,张晓瑞.汽车碰撞假人制度体系研究[J].标准科学,2013(11):58-61.CHEN Yuzhong,YIN Yan,ZHANG Xiaorui.Research on the crash test dummies system[J].Standard Science,2013(11):58-61.(in Chinese)
[6]贾恒信,李明波,吕江涛.基于力矩平衡原理的物体重量重心测量系统的研究及应用[J].衡器,2012,41(8):5-9.JIA Hengxin,LI Mingbo,LV Jiangtao.Research and application of object center of gravity measuring system based on torque balance theory[J].Weighing Instrument,2012,41(8):5-9.(in Chinese)
[7]单信海,杜英杰,单洪标,等.便携式多功能人体重心位置动态检测系统的研制[J].中国体育科技,2007,43(1):106-109.SHAN Xinhai,DU Yingjie,SHAN Hongbiao,et al.Development of potable multi-functional determination system of dynamic human body center[J].Chin Sport Sci Tech,2007,43(1):106-109.(in Chinese)
[8]林虎.螺旋桨桨叶重心检测系统的研究与设计[D].大连:大连理工大学,2007.LIN Hu.Design and research on the prop-blade barycenter measurement system[D].Dalian:Dalian University of Technology,2007.(in Chinese)
[9]潘若刚,曹雷,王巍.高精度全机重心测量方法的探讨[J].飞机设计,2010,30(2):1-4.PAN Ruogang,CAO Lei,WANG Wei.Research on the method of weight and balance measure of the whole aircraft with high accuracy[J].Aircraft Design,2010,30(2):1-4.(in Chinese)
[10]徐灏.机械设计手册,第1卷[M].北京:机械工业出版社,1991:3-22.XU Hao.Mechanical Design Handbook,Vol 1[M].Beijing:China Machine Press,1991:3-22.(in Chinese)
[11]汤骏.基于中国人体尺寸假人头部仿真研究[D].长沙:湖南大学,2016.TANG Jun.Simulation study on Chinese dummy head model[D].Changsha:Hunan University,2016.(in Chinese)
[12]李云雁,胡传荣.试验设计与数据处理[M].北京:化学工业出版社,2008:20-21.LI Yunyan,HU Chuanrong.Experiment Design and Data Processing[M].Beijing:Chemical Industry Press,2008:20-21.(in Chinese)
[13]Mertz H J,Irwin A L,Melvin J W,et al.Size,weight and biomechanical impact response requirements for adult size small female and large male dummies[R].SAE Tech Paper,No.890756,1989.