相关实验视频
Updated: Jul 4, 2025
12:10
Semi-automated Optical Heartbeat Analysis of Small Hearts
Published on: September 16, 2009
12.3K
通过墙壁的人类心跳检测使用单通道CW雷达
Sourav Kumar Pramanik1, Shekh Md Mahmudul Islam1
1Department of Electrical and Electronic Engineering, University of Dhaka, Dhaka, Bangladesh.
Frontiers in physiology
|February 8, 2024
概括
这项研究引入了一个简单的单通道雷达系统,可以通过墙壁准确检测心率,即使是两个人同时. 这一突破为救援和监控应用提供了新的可能性.
科学领域:
- 微波工程 微波工程
- 生物医学工程 生物医学工程
- 信号处理 信号处理
背景情况:
- 单通道连续波 (CW) 雷达为目标检测提供了简单,经济高效的解决方案,但缺乏范围和角度信息.
- 透过墙壁检测生命信号对于搜索和救援等应用至关重要,现有的研究通常依赖于复杂的多通道雷达系统.
- 目前通过墙壁监测生命体征的方法在准确性和并发主体检测方面面临挑战.
研究的目的:
- 提出并验证使用单通道24GHz CW雷达的新型穿墙生命体征检测系统.
- 通过各种障碍,证明从单个和并发的受试者中提取心率的能力.
- 为了利用最大重叠的离散波形变换 (MODWT) 来增强信号处理和心跳波形隔离.
主要方法:
- 使用单通道24GHz CW雷达系统进行非侵入性生命体征检测.
- 应用了最大重叠离散波形变换 (MODWT) 来处理雷达信号并提取心跳信息.
- 通过木头和墙,在不同距离 (20-100厘米) 的多个受试者进行了实验,将结果与Biopac ECG数据进行比较.
主要成果:
- 通过不同的障碍物,在距离高达100厘米的单个受试者中,达到95.27%的平均心率提取精度.
- 在40厘米的距离上,成功地分离了两个同时参与者的独立心跳波形,准确度为97.04%,距离40厘米.
- 该MODWT方法在40厘米以上的单个对象检测中优于直接的快速里埃变换 (FFT) 方法.
结论:
- 拟议的单通道CW雷达系统,增强了MODWT,提供了一个准确和简化的方法,通过墙壁监测生命体征.
- 这项技术展示了在灾难场景中实时检测个人,安全监视和患者监控的巨大潜力.
- 在没有范围或角度估计的情况下检测并发心跳的能力为实际的穿墙应用提供了独特的优势.
相关概念视频
01:30Pulse rhythm
799
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
799
01:30Equipments Used To Measure Blood Pressure
972
Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
972
01:15Heart Sounds
1.9K
Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V)...
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V)...
1.9K
01:05Doppler Effect - II
3.4K
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
3.4K