Raman Spectroscopy Noise Reduction via Light Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing calorific value measurement devices for fuel gases in gas-fired power plants face challenges with slow response times and high noise levels, particularly when using Raman scattering light, which affects the accuracy and speed of measuring the composition and calorific value of fuel gases, leading to increased operational costs and reduced reliability.
Innovation Solution
A fluid composition analysis mechanism that includes a light source for excitation, a light receiving unit, a Raman scattering light collection optical system, and a light shielding member to enhance the intensity of Raman scattering light and reduce noise interference, allowing for rapid and accurate measurement of the fuel gas composition and calorific value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If Raman scattering light measurement is used for rapid calorific value measurement, then measurement speed is improved, but measurement precision deteriorates due to low signal-to-noise ratio
Solution Approach 1:
The patent converts the harmful noise light generated by excitation light irradiating foreign matter on the measurement window into a beneficial configuration by strategically placing light shielding members. The shielding members are positioned to block noise light paths while preserving Raman scattering light paths, effectively converting the noise problem into a structured optical design solution that enables rapid yet precise measurement
Solution Approach 2:
The patent introduces light shielding members as intermediary elements between the measurement window and the detector. These shielding members act as mediators that selectively block noise light while allowing Raman scattering light to pass through, thereby improving the signal-to-noise ratio and enabling both rapid and precise calorific value measurement
2Measurement precision
If intensity of incident excitation light is increased to improve signal intensity, then signal-to-noise ratio is improved, but device cost and noise increase
Solution Approach 1:
The patent extracts and removes the harmful noise light component from the optical system by strategically placing light shielding members. Instead of increasing excitation light intensity to improve signal-to-noise ratio, the invention selectively removes noise light paths while preserving Raman scattering light paths, thereby improving measurement precision without increasing device cost or noise generation
3Ease of operation
If measurement window is used for excitation light incidence, then measurement simplicity is maintained, but noise light is generated by foreign matter contamination
Solution Approach 1:
The patent introduces light shielding members as intermediary elements between the measurement window and the detector. These shielding members act as mediators that selectively block noise light generated by foreign matter on the measurement window while allowing Raman scattering light to pass through, thereby maintaining measurement simplicity while reducing noise light interference
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables high-speed, high-accuracy measurement of fuel gas composition and calorific value, improving operational reliability and reducing costs by minimizing noise interference and enhancing signal-to-noise ratio, thus enabling rapid control of fuel gas composition in power plants.
Implementation Method 1
a light receiving unit configured to receive and disperse a Raman scattering light generated from the sample fluid irradiated with the excitation light
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fluid composition analysis mechanism includes a light source for applying excitation light to a sample fluid at a measurement position, a light receiving unit configured to receive and disperse Raman scattering light generated from the sample fluid irradiated with the excitation light, a Raman scattering light collection optical system configured to collect the Raman scattering light generated at the measurement position and to cause the Raman scattering light to be incident on the light receiving unit, a calculation unit for calculating a composition of the sample fluid based on an output of the light receiving unit, and a light shielding member arranged on the optical path of the excitation light or on the extended line of the excitation light.