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Related Concept Videos

Sampling Continuous Time Signal01:11

Sampling Continuous Time Signal

In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
Special considerations while measuring pulse01:13

Special considerations while measuring pulse

Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
Pulse rhythm01:30

Pulse rhythm

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 muscle...
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
Rectangular and Triangular Pulse Function01:19

Rectangular and Triangular Pulse Function

The unit rectangular pulse function is mathematically represented by a rectangular function centered at the origin with a height of one unit. This function is defined by two parameters: T, which specifies the center location of the pulse along the time axis, and τ, which determines the pulse duration.
For example, consider a rectangular pulse with a 5V amplitude, a 3-second duration, and centered at t=2 seconds. This pulse can be expressed using the rectangular function, written as,
Regulation of Pulse01:20

Regulation of Pulse

Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.

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Automated Analysis of Dynamic Ca2+ Signals in Image Sequences
06:49

Automated Analysis of Dynamic Ca2+ Signals in Image Sequences

Published on: June 16, 2014

[Dynamic pulse signal acquisition and processing].

Aihua Zhang1, Yongxin Chou

  • 1College of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China. lutzhangah@163.com

Zhongguo Yi Liao Qi Xie Za Zhi = Chinese Journal of Medical Instrumentation
|June 29, 2012
PubMed
Summary
This summary is machine-generated.

This study developed effective digital filters to process real-time pulse signals, accurately calculating pulse rate and height while suppressing interference for dynamic signal analysis.

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Area of Science:

  • Biomedical Engineering
  • Signal Processing

Context:

  • Real-time acquisition and processing of pulse signals are crucial for physiological monitoring.
  • Pulse signals are often corrupted by various forms of interference, complicating analysis.

Purpose:

  • To design and validate digital filters for real-time pulse signal processing.
  • To implement and test a Digital Signal Processor (DSP) based system for pulse wave analysis.

Summary:

  • Integer coefficient notch and low-pass filters, along with an envelope filtering method, were designed to address pulse signal disturbances.
  • The pulse signal was processed in both time and frequency domains on a DSP, with simplified programming.
  • Pulse wave height and rate were calculated in real-time, and the signal spectrum was analyzed using Fast Fourier Transform (FFT).

Impact:

  • The developed filters effectively suppress interference in pulse signals.
  • The system demonstrates real-time detection and analysis capabilities for dynamic pulse signals.
  • This work contributes to improved accuracy and reliability in non-invasive physiological monitoring systems.