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Design Example01:23

Design Example

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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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Ultrasonography01:17

Ultrasonography

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
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Updated: Jun 25, 2025

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
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Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

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反向刺激使NDE的超声波二进制编码能够使用自定义的线性测试系统进行NDE.

Marius W Schäfer1, Sarah C L Fischer1

  • 1Fraunhofer IZFP, Campus E3.1, Saarbruecken, 66123, Saarland, Germany.

Ultrasonics
|May 26, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了超声波测试的逆刺激,使超声波回声能够精确控制. 这种方法实现了二进制超声波回声生成与性能匹配的数字代码,增强非破坏性评估能力.

关键词:
二进制编码二进制编码编码激发激发的编码反向刺激是一种反向刺激.线性系统模型模型超声波超声波是指超声波的使用.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 非破坏性的评价
  • 信号处理 信号处理

背景情况:

  • 传统的超声波测试方法在复杂的材料方面存在局限性.
  • 像雷达和医疗超声波中的编码刺激等技术提供了优化潜力.
  • 扩展超声波测试能力需要先进的信号处理策略.

研究的目的:

  • 探索超声波测试系统的逆刺激.
  • 为了设计超声波回声来匹配目标代码序列.
  • 展示一种用于增强超声波非破坏性评估的新方法.

主要方法:

  • 设计并制造了一种定制的超声波测试系统.
  • 通过脉冲和声刺激获得了系统的传输功能.
  • 基于转移函数进行逆刺激,以塑造超声波回声.
  • 分析了生成的回声的自动相关函数,并将其与原始代码序列进行了比较.

主要成果:

  • 成功设计了超声波回声来匹配目标二进制代码序列.
  • 证明反向刺激可以产生二进制超声波回声,其性能相当于数字代码.
  • 验证了用于回声工程的定制超声波系统的有效性.

结论:

  • 反向刺激是先进超声波测试的可行技术.
  • 拟议的集成低压系统可以通过传输函数分析实现回声工程.
  • 这种方法显著提高了超声波非破坏性评估的功能和应用.