Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for enhancing sensitivity of photoacoustic system and avoiding polishing of photoacoustic cell by using acetate fiber membrane

A technology of cellulose acetate membrane and system sensitivity, which is applied in color/spectral characteristic measurement, material analysis through optical means, instruments, etc., can solve the problems of increasing the processing difficulty of photoacoustic pool and limiting the sensitivity of photoacoustic system, etc. Small processing difficulty, enhanced sensitivity, large space effect

Active Publication Date: 2021-04-20
DALIAN UNIV OF TECH
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polishing the non-resonant photoacoustic pool is a very effective method, but it also increases the processing difficulty of the photoacoustic pool
In addition, for some photoacoustic cells with irregular shapes, it is difficult to polish them, which limits the further improvement of the sensitivity of the photoacoustic system.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for enhancing sensitivity of photoacoustic system and avoiding polishing of photoacoustic cell by using acetate fiber membrane
  • Method for enhancing sensitivity of photoacoustic system and avoiding polishing of photoacoustic cell by using acetate fiber membrane
  • Method for enhancing sensitivity of photoacoustic system and avoiding polishing of photoacoustic cell by using acetate fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0021] The present invention provides as attached figure 1 The non-resonant photoacoustic cell system shown is mainly composed of an outer cover 1 , a pressing sheet 2 , a non-resonant sensing head 3 and a cellulose acetate membrane 4 .

[0022] Figure 4 Shown is a schematic diagram of the shape of the cellulose acetate film attached to the pressed sheet, and the shape and size of the cellulose acetate film and the pressed sheet are the same.

[0023] Figure 5 What is shown is a schematic diagram of the shape of the cellulose acetate film attached to the outer cover, and the shape and size of the cellulose acetate film are the same as that of the lower part of the outer cover.

[0024] Operation process: Firstly, the second harmonic diagram of the non-resonant photoacoustic cell system that is not poli...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of trace gas detection, and provides a method for enhancing the sensitivity of a photoacoustic system and avoiding polishing of a photoacoustic cell by using an acetate fiber membrane, in an off-resonance photoacoustic cell system, the acetate fiber membrane is fully attached to the interior of the photoacoustic cell, and the absorption optical path of gas is increased by increasing the scattering times of an excitation light source in the photoacoustic cell, and the sensitivity of the photoacoustic system is enhanced. The method is simple in operability, the sensitivity can be enhanced by about three times only by adhering the acetate fiber membrane to the interior of the photoacoustic cell, the requirement of the non-resonant photoacoustic cell for the roughness of the interior is very high, no polishing of the non-resonant photoacoustic cell can be achieved through the method, and the machining cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of trace gas detection, and relates to a method for enhancing the sensitivity of a photoacoustic system and eliminating polishing of a photoacoustic cell by using a cellulose acetate membrane. Background technique [0002] Trace gas detection has a wide range of application requirements in the fields of atmospheric environment detection, industrial process control and life sciences. With the development of laser technology, spectroscopic technology has become a gas detection method with the advantages of high sensitivity, fast response time and strong selectivity. Photoacoustic spectroscopy is a spectral calorimetry technique that directly measures the heat generated by a gas due to the absorption of light energy. It is a background-free absorption spectroscopy technique. In a detection system based on photoacoustic spectroscopy detection technology, a photoacoustic cell is generally used as an acoustic wav...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17G01N21/25G01N21/01
Inventor 宫振峰吴国杰李海娥高田力
Owner DALIAN UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com