相关实验视频
Updated: Jan 15, 2026

16:11
Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
9.8K
概括
一种新的相位转移集成 (PSI) 方法显著提高光纤振动传感器解调速度,实现了超过70倍的改进. 这种技术为振动传感应用提供了卓越的实时性能和信号质量.
科学领域:
- 光电学是指光电子产品.
- 传感器技术 传感器技术
- 信号处理 信号处理
背景情况:
- 光纤传感器对于振动监测至关重要.
- 异质子检测是光纤传感的一个常见方法.
- 传统的解调方法可能很慢,限制了实时应用.
研究的目的:
- 为光纤振动传感器提出快速解调方法.
- 使用相位移集成 (PSI) 加快相位解调过程.
- 为了提高传感系统的实时性能和调节效果.
主要方法:
- 开发了一种基于相位移集成 (PSI) 的解调技术.
- 在异质载体周期内利用相邻采样点之间的相位关系.
- 采用了振动信号恢复的基本代数计算.
主要成果:
- 实现了至少比传统方法高出七十倍的解调速度.
- 通过调整载波频率来进一步提高速度.
- 压抑的高阶波项在至少18.5dB的解调.
结论:
- 该PSI方法显著加快了光纤振动传感器的相调解.
- 这种技术增强了实时传感能力,并改善了模块化信号质量.
- 该方法在先进的振动监测系统中表现有前途.
相关概念视频
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
1.7K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
1.7K
Time and frequency -Domain Interpretation of Phase-lag Control
389
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
389

