基于虚拟仪器技术的新型血液粘度仪的研制

目的:基于卡森方程的原理,设计发展出一种新型的快速准确测量血液粘度的仪器。方法:此种新的测量仪器基于有别于传统的磨擦力矩测量血液粘度的方法,其动态测量方法接近血液在血管中的流动性特点,且测量更为快速。根据血液具有非牛顿流体的特性,结合血液在平直圆管中的卡森流量公式,以及Stokes公式,通过一系列的数学推导,借助计算机虚拟仪器软件技术进行复杂的数学运算,求出血液的卡森粘度及卡森屈服应力。并以压力传感器和恒流蠕动泵,排废泵,锥形贮血瓶,清洗液瓶,五个电磁阀,及相应的管路和进样针等组成有关仪器系统。结果:通过数据信号采集板控制电磁阀与恒流蠕动泵的运行,实现了对血液卡森粘度及卡森屈服应力的简便快捷测定,并同时方便得出了在各种切变率下的血液表观粘度。结论:与现有临床同类仪器相比较,本文所研制出的血液粘度仪具有更简单的机械结构,更快的测量速度与相当高的精确性,其不仅能检测出全血等各种流体在任意不同切变率下的表观粘度,且能精确求出全血的卡森粘度及卡森屈服应力,具有重要的临床诊断意义。

The Novel Blood Viscosity Aanalyzer Based on Virtual Instrument Technology

Objective:To develop a novel fast auto blood viscosity analyzer based on the relation between flow rate and Casson viscosity of non-Newton fluid such as blood. Methods:Different from the tradition friction method of measuring blood viscosity,the instrument was developed based on the Casson flow equation for blood in round tube and Stokes equation,using virtual instrument technique to calculate the Casson viscosity and stress,and pressure sensor and peristaltic pump to perform a setup. Results:Controlled by ...