Purpose

The study of vascular mechanics is important. The purpose of this paper is to present an apparatus to measure the biomechanical properties of blood vessels, which can be used for tensile test and fatigue test.

Design/methodology/approach

This equipment consists of a mechanical test platform, a hardware circuit based on FPGA and control software. The torque generated by stepper motor is converted to axial force by ball screw, and the vascular specimen is stretched axially. The tension is measured by a load cell, and the displacement is recorded by a grating displacement sensor.

Findings

According to the results of calibration experiment and stability experiment, the linearity error of the system is 0.251, the hysteresis error is 0.047, the repeatability error is 0.185, the comprehensive error is 0.315 and the standard deviation of the output is less than 0.01 N. A test of animal vascular mechanical properties was carried out, and the results are consistent with the theory.

Originality/value

This apparatus is designed to measure biomechanical properties of blood vessels, and the results of experiments indicate that it is stable and reliable. This work is valuable for studying vascular disease and testing artificial blood vessels.

中文翻译：

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一种测量血管生物力学特性的新型仪器

目的

血管力学的研究很重要。本文的目的是提供一种测量血管生物力学性能的设备，该设备可用于拉伸测试和疲劳测试。

设计/方法/方法

该设备由机械测试平台，基于FPGA的硬件电路和控制软件组成。步进电机产生的扭矩通过滚珠丝杠转换为轴向力，血管样本轴向拉伸。通过称重传感器测量张力，并通过光栅位移传感器记录位移。

发现

根据校准实验和稳定性实验的结果，系统的线性误差为0.251，磁滞误差为0.047，重复性误差为0.185，综合误差为0.315，输出的标准偏差小于0.01 N.对动物的血管力学性能进行了测试，结果与理论相符。

创意/价值

该仪器旨在测量血管的生物力学性能，实验结果表明该仪器稳定可靠。这项工作对于研究血管疾病和测试人造血管非常有价值。