摘要
血管力学特性参数是血管重要指标之一,对临床医学研究等具有重要意义。该文研制了一套全新的血管力学特性测试系统,不仅实现了常规的一维拉伸断裂实验,而且能对血管进行疲劳往复拉伸测试。该测试系统包括测试机械平台、基于FPGA的硬件测试电路及数据处理软件等。机械平台通过滚珠丝杠把电机的旋转运动转换为直线运动,为血管拉伸提供轴向拉力。滚珠丝杠与力学传感器相连接,用于实现对力学数据的读取。拉力作用下血管位移数据的读取通过光栅尺实现。对血管测试的结果表明误差在0.292%,该系统完全可以实现对血管力学特性的测试。
The vascular mechanical parameters are important indicators for human vascular and they play important roles in clinical research. This paper developed a new vascular mechanical properties testing system. This system not only realizes the tensile rupture test in one dimensional, but also the reciprocating tensile test for vascular, which provides more comprehensive experimental data and theoretical basis for the study of human vascular. The system consists of three parts： the mechanical platform, hardware circuit and upper computer system. The mechanical platform transforms the rotation movement of motor into linear movement via the structure of ball screw. And the ball screw and tension sensor are connected, which is used for mechanical data reading. The displacement data is collected by displacement sensor. Experiments show that the accuracy is better than 0.292%, and could meet the demand of the testing of vascular biomechanical characteristics.
出处
《中国医疗器械杂志》
2017年第1期51-55,共5页
Chinese Journal of Medical Instrumentation
基金
国际合作项目资助(2014DFA31230)
关键词
血管力学特性测试系统
断裂试验
疲劳特性实验
往复拉伸测试
vascular biomechanics characteristics testing system, tensile breaking test, fatigue properties, reciprocating tensile test
