Understanding natural frequency and damping and how they relate to the measurement of blood pressure
Understanding natural frequency and damping and how they relate to the measurement of blood pressure
复制标题
了解固有频率和阻尼以及它们与血压测量的关系
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
B. Kleinman
中科院分区：
文献类型：
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作者：
B. Kleinman
描述充液导管-传感器血压监测系统的物理行为的模型是一个简单的质量弹簧系统。当质量移动然后释放时，会产生一种特征运动，称为简谐运动。对这种运动的完整描述需要定义无阻尼和阻尼固有频率以及阻尼本身的概念。一旦这些概念被定义和质量弹簧系统清楚地理解，其相关性记录的流体填充导管的血压测量的解释。澄清了阻尼如何影响无阻尼固有频率的明显矛盾。最后，阻抗匹配是在一些阻尼装置如何工作的背景下解释的。详细的数学证明归入附录。
The model that describes the physical behavior of a fluid-filled catheter-transducer blood pressure monitoring system is a simple mass-spring system. When the mass is displaced and then released, there results a characteristic motion calledsimple harmonic motion. The full description of this motion requires defining the concepts of undamped and damped natural frequency, as well as of damping itself. Once these concepts are defined and the mass-spring system clearly understood, their relevance to recording blood pressure measurement by fluid-filled catheters is explained. The apparent paradox of how damping can affect undamped natural frequency is clarified. Finally, impedance matching is explained in the context of how some damping devices work. Detailed mathematical proofs are relegated to an appendix.