【作者】 王司洋；

【导师】 元文学；

【作者基本信息】 大连理工大学 ， 运动人体学， 2011， 硕士

【摘要】 随着社会不断进步,生活水平不断提高,人们对健康的关注越来越多,全民健身的理念已经逐渐深入人心。在平时生活和运动中对于足部的依赖很大,足部承受着全身的压力。压力的变化也与很多疾病的发生有着紧密的联系。特别的,对足底压力分布进行研究,对于运动员选材,训练过程中的动作分析,会给教练员提供更为有针对性的理论指导,有助于运动员成绩进一步提高。因此对于足底压力的研究是非常重要而且有意义的。在研究前人工作的基础上,本文采用PVDF高分子薄膜元件作为传感元件,发挥其易加工,柔软,韧性好的特点,在研究其压电特性的基础上,首先制作单体的电荷采集单元,实现了对单体薄膜的电荷量到AD可以采集的电压量转换,且有较好的低频响应。其次,将其制作成阵列分布,通过两行四列8个点的分布,来完成对于一个区域压力分布的采集,从而实现实时采集足底压力分布的情况。在设计过程中,对于电荷放大器的设计给予了详尽的论述,还有针对性的设计了滤波电路,保证信号的准确获取。特别的还设计了键盘和显示功能,配合控制。在计算机通信的环节,设计了串口通信和USB通信两种方式,将数据传给计算机,这样有助于对数据进一步的分析和处理。最后给出了系统的组成结构和控制器设计的软件流程。给出了足底压力分布采集系统的测试情况。首先,更改电荷放大器各环节参数,通过对实际测试情况分析,与理论计算相符,并且根据具体的测试需要,给出相对合适的一组参数。其次,对于滤波电路,也从仿真和实际测试两个方面进行对比,结果证明与理论计算相一致。最后,给出阵列数据的获取情况,通过对数据分析,表明数据符合实际的压力情况,达了预期设计要求。实践证明,本设计方案在实现压力分布采集是可行的。课题研究可扩展到压力鞋垫和压力平板等领域,其应用领域十分广泛。更多还原

【Abstract】 As society progresses, living standards rising, health is more and more concerned. The concept of fitness has gradually been taken root. In our daily life or movements depends greatly on the the foot, Foot bear the pressure of the body. Plantar pressure changes and the occurrence of many diseases are closely linked. In particular, research on plantar pressure distribution, the player selection and training process of motion analysis, will provide more theoretical guidance for coaches to help athletes improve performance. Therefore, the research of the foot pressure is very important and meaningful.In the study of previous work, we adopt the PVDF piezoelectricity film as sensor element, to play its easy processing, flexibility and good toughness Features. Based on the study of its piezoelectric properties, firstly, production of single charge collection unit, to achieve the output of a single piezoelectricity film can be collected by the voltage of AD converter. and there is a better low frequency response. Secondly, the distribution of its production into an array, two lines of four columns by 8 points in the distribution, to complete a regional pressure distribution for the collection, which can achieve real-time acquisition of plantar pressure distribution. In the design process, the design of charge amplifier gives a detailed discussion, as well as the design of the filter circuit ensure the accuracy of the obtained signal. Also designed a special keyboard and display circuit, which control the system. Serial communication and USB communication are designed for computer communication, by which the datas can be transmit to the computer, these datas can help further analysis and processing. Finally, the system architecture and software process controller design are given out.First, change the parameters of three sectors of the charge amplifier, through the analysis of actual test conditions, consistent with the theoretical calculation, and the specific testing needs given an appropriate group of parameters. Second, test the filter circuit, from both simulation and actual test results compare with the theoretical calculation prove that they are consistent. Finally, test the array data, through data analysis, show that the datas are consistent with the actual pressure condition, meet the desired design requirements. Practice has proved that to achieve the pressure distribution design in the collection is feasible. Research can be expanded to stress areas such as insoles and the pressure plate, which has wide range of applications.更多还原