使用冷凝器麦克风测压器动态压力测量
Žan Tomazini1, Gregor Geršak1, Samo Beguš1
1Faculty of Electrical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia.
Sensors (Basel, Switzerland)
|October 14, 2023
概括
研究人员开发了一种新的射频麦克风系统,用于测量血压 (BP) 设备中的空气压力. 这项创新旨在减少血压测量误差,改善高血压诊断,解决全球关键的健康需求.
科学领域:
- 生物医学工程 生物医学工程
- 计量学 计量学 计量学
- 心血管健康 心血管健康
背景情况:
- 高血压的诊断依赖于精确的血压 (BP) 测量,但目前3mmHg的误差是不够的.
- 心血管疾病是导致死亡的首要原因,医疗保健成本很高.
- 缺乏动态压力测量标准阻碍了准确的BP评估.
研究的目的:
- 引入一种用于测量血压计管内气压的新方法,用于测量血压.
- 开发和测试一个利用冷凝器麦克风和射频 (RF) 调制用于压力传感的系统.
- 为了建立BP测量设备可追溯性到声学标准.
主要方法:
- 设计和建造了一个RF调制系统,将麦克风电容变化转换为压力信号.
- 使用低频 (LF) 声源,BP模拟器和压力压力传感器测试了系统.
- 进行了全面的测试,以确定开发系统的不确定性预算.
主要成果:
- 射频麦克风原型的功能频率范围为0.5Hz至280Hz.
- 该系统准确地测量了0~300mmHg范围内的压力.
- 射频麦克风的总扩展不确定性 (k=2,p=95.5%) 确定为4.32 mmHg.
结论:
- 拟议的射频麦克风方法为改善BP测量精度提供了一个潜在的解决方案.
- 这项技术可以使BP设备可追溯到已建立的声学标准 (IEC 61094-2).
- 该系统可能有助于制定关键的动态BP测量标准.
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