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相关概念视频

Parallel Resonance01:23

Parallel Resonance

205
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
205
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

198
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
198
Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

252
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
252
Concept of Resonance and its Characteristics01:19

Concept of Resonance and its Characteristics

5.0K
If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not...
5.0K
Resonance in an AC Circuit01:26

Resonance in an AC Circuit

2.0K
The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge across its terminals. Hence, if an inductor and capacitor are connected in series, they have opposite effects on the relative phase between current and voltage. The current through the circuit undergoes forced oscillation at the frequency of the source. The resistance term in an R-L-C circuit acts as a damping term because power is dissipated...
2.0K
Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

287
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
287

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相关实验视频

Updated: Jun 25, 2025

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver
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带有多重共振的被动无线部分放电传感器.

Zhenheng Xu1,2, Bing Tian2, Shiqi Guo1

  • 1Key Laboratory of MEMS of the Ministry of Education, School of Electronic Science & Engineering, Southeast University, Nanjing 210096, China.

Micromachines
|May 25, 2024
PubMed
概括

本研究介绍了一种新型的被动无线传感器,用于检测气体绝缘开关装置 (GIS) 中的部分放电 (PD). 新的传感器提供了增强的灵敏度和高的信号噪声比,提高了PD检测的准确性.

关键词:
感应器电容器 传感器多重共振的多重共振器部分放电检测检测部分放电检测无线传感无线传感

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科学领域:

  • 电气工程 电气工程
  • 材料科学 材料科学 材料科学
  • 物理 物理学 物理

背景情况:

  • 部分放电 (PD) 是气体绝缘开关装置 (GIS) 绝缘的主要缺陷.
  • 目前的PD检测方法,如有线天线或外部超高频天线,具有包括破坏性安装和不良反干扰能力在内的局限性.
  • 需要用于GIS的非侵入性,高度敏感的PD检测方法.

研究的目的:

  • 开发和评估一种新的被动无线传感器,用于在GIS中检测PD.
  • 与现有方法相比,提高PD检测灵敏度和信号噪声比 (SNR).
  • 通过实验性基准测试来验证拟议的传感器的准确性和有效性.

主要方法:

  • 一个被动的无线PD传感器利用多共振板分支感应器被设计并植入GIS内部在一个观察窗口上.
  • 一个同轴对齐的外部读出电路被用于无线查询传感器并获得PD信号.
  • 实验验证包括将拟议的传感器与在受控实验室环境中的商业超高频传感器进行基准测试.
  • 进行了无线校准测试,以评估PD信号测量的精度.

主要成果:

  • 拟议的多共振传感器与商用超高频传感器相比,显示信号强度提高了2.5倍.
  • 由于传感器的内部植入,可以达到68.82dB的高信号噪声比 (SNR).
  • 无线校准测试显示,高信号测试精度为0.72 pC.
  • 成功获得相位解析部分放电 (PRPD) 图案,证明传感器能够捕获PD特征.

结论:

  • 开发的被动无线PD传感器为GIS中PD检测提供了一个非破坏性和高效的解决方案.
  • 传感器的多共振设计显著提高了检测灵敏度和信号质量.
  • 实验结果证实了拟议方法的卓越性能,高SNR和PD监测应用中的准确性.