相关实验视频

Updated: Feb 20, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

迷你海尔姆霍尔茨光声学传感器具有高时间分辨率,用于微量气体检测

Ting Gong, Shuai Shi, Zhijin Shang

|February 18, 2026

概括

这项研究引入了一种新的光声传感器,用于高时间分辨率测量. 它实现了微量乙 (C2H2) 的快速检测,检测极限低,气体交换时间快.

科学领域:

分析化学分析化学
频谱学是一种光谱学.
传感器技术传感器技术

背景情况:

光声谱学可提供灵敏的气体检测.
传统的方法往往缺乏高时间分辨率.
环境噪音可以干扰敏感的测量.

研究的目的:

开发一个高时间分辨率的光声学传感器.
为了改善噪声抑制,以便进行准确的测量.
为了实时监测气体度.

主要方法:

使用了一个微型的赫尔姆霍尔茨光声学单元 (H-PAC) 与差分模式配置.
采用快速波长扫描方法来获取节拍频率信号.
使用微量乙 (C2H2) 作为分析剂来表征传感器性能.

主要成果:

对C2H2.2,已达到536ppb的最低检测极限 (MDL).
证明了系统的气体交换时间为9.3秒,在100平方厘米处.
获得的节拍频率信号每20毫秒一次,以获得高时间分辨率.

结论:

开发的H-PAC传感器为气体分析提供了高时间分辨率.
不同模式配置有效地抑制了环境噪音.
该传感器适用于跟踪快速度波动.

更多相关视频

Hand-held Clinical Photoacoustic Imaging System for Real-time Non-invasive Small Animal Imaging

Hand-held Clinical Photoacoustic Imaging System for Real-time Non-invasive Small Animal Imaging

Published on: October 16, 2017

Universal Hand-held Three-dimensional Optoacoustic Imaging Probe for Deep Tissue Human Angiography and Functional Preclinical Studies in Real Time

Universal Hand-held Three-dimensional Optoacoustic Imaging Probe for Deep Tissue Human Angiography and Functional Preclinical Studies in Real Time

Published on: November 4, 2014

相关概念视频

Gas Chromatography: Types of Detectors-II

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...