谐振血液粘弹性传感器Bl系数空间分布动态测量系统设计  

Design of a dynamic measurement system for Bl factor spatial distribution of resonant bloodviscoelastic sensor

作　　者：钱俊[1,2] 孙海旋[2,3] 王弼陡[2] QIAN Jun;SUN Haixuan;WANG Bidou(Division of Life Sciences and Medicine,School of Biomedical Engineering(Suzhou),University of Science and Technology of China,Suzhou,Jiangsu215163,P.R.China;Suzhou Institute of Biomedical Engineering and Technology,Chinese Academy of Sciences,Suzhou,Jiangsu 215163,P.R.China;Jinan Guoke Medical Technology Development Co.,Ltd.,Jinan 250102,P.R.China)

机构地区：[1]中国科学技术大学,生物医学工程学院(苏州),生命科学与医学部,江苏苏州215163 [2]中国科学院苏州生物医学工程技术研究所,江苏苏州215163 [3]济南国科医工科技发展有限公司,济南250102

出　　处：《生物医学工程学杂志》2023年第5期965-972,共8页Journal of Biomedical Engineering

基　　金：吉林省重点科技研发项目(20180201061YY);国家重点研发计划(2022YFA1104802);泉城“5150”引才倍增计划(E0030P57)。

摘　　要：Bl系数是谐振血液粘弹性传感器的关键系统参数。本文设计了一种基于速度振幅和动生阻抗的Bl系数空间分布动态测量系统。系统在驱动传感器产生简谐振荡的动态条件下,利用激光位移和阻抗分析,结合同相/正交解调算法,提取线圈的速度振幅和动生阻抗,并通过调节激励电流的直流分量来控制线圈的平衡位置,从而实现位置扫描。在[-240, 240]μm位置区间内,测量结果的最大变异系数为0.077 3%,与仿真结果的最大相对误差为2.937 9%,线性拟合相关系数R2=0.996 8。该系统可用于精确测量谐振血液粘弹性传感器Bl系数的空间分布,为传感器磁路的设计验证提供了技术支撑。Bl factor is a key system parameter of the resonant blood viscoelastic sensor.In this paper,a dynamic measurement system for the spatial distribution of Bl factor based on velocity amplitude and motional impedance was designed.The system extracted the velocity amplitude and motional impedance of the coil under the dynamic condition of driving the sensor to generate simple harmonic oscillations using laser displacement and impedance analysis combined with in-phase/quadrature demodulation algorithm,and controlled the equilibrium position of the coil by adjusting the direct current component of the excitation current to realize the position scanning.In the position interval of[-240,240]μm,the maximum coefficient of variation of the measurement results was 0.0773%,and the maximum relative error to the simulation results was 2.9379%,with a linear ftting correlation coefficient R?=0.9968.The system can be used to accurately measure the spatial distribution of Bl factor of the resonant blood viscoelastic sensor,which provides a technical support for the verification of the design of the sensor magnetic circuit.

关 键 词：血液粘弹性传感器 Bl系数 激光位移 动生阻抗 频谱泄露 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] R318[自动化与计算机技术—控制科学与工程]