[用于共振血液粘弹性传感器的 Bl 因子空间分布动态测量系统的设计]
[Design of a dynamic measurement system for Bl factor spatial distribution of resonant blood viscoelastic sensor].
作者信息
Qian Jun, Sun Haixuan, Wang Bidou
机构信息
Division of Life Sciences and Medicine, School of Biomedical Engineering (Suzhou), University of Science and Technology of China, Suzhou, Jiangsu 215163, P. R. China.
Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, P. R. China.
出版信息
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2023 Oct 25;40(5):965-972. doi: 10.7507/1001-5515.202301019.
factor is a key system parameter of the resonant blood viscoelastic sensor. In this paper, a dynamic measurement system for the spatial distribution of 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 0.077 3%, and the maximum relative error to the simulation results was 2.937 9%, with a linear fitting correlation coefficient = 0.996 8. The system can be used to accurately measure the spatial distribution of factor of the resonant blood viscoelastic sensor, which provides a technical support for the verification of the design of the sensor magnetic circuit.
因子是谐振式血液粘弹性传感器的一个关键系统参数。本文设计了一种基于速度幅值和运动阻抗的因子空间分布动态测量系统。该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幅值和运动阻抗，并通过调节激励电流的直流分量来控制线圈的平衡位置以实现位置扫描。在[-240, 240]μm的位置区间内，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 = 0.996 8。该系统可用于精确测量谐振式血液粘弹性传感器因子的空间分布情况，为传感器磁路设计的验证提供了技术支持。
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