In-situ LIBS Probe for Liquid Metal Component Detection
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Solution Overview
Problem
Current online monitoring technologies for high-temperature liquid metal components in metallurgical processes are limited by their complexity, environmental adaptability, and inability to simultaneously measure multiple elements like C, S, and P, leading to inefficient quality control and high resource consumption.
Innovation Solution
An in-situ online detection device using a double-pulse LIBS method with a high-temperature resistant probe and optical sensing system, allowing for flexible installation, real-time measurement, and inert gas environment to enhance spectral quality and accuracy, capable of measuring components over long distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If offline detection with manual sampling is used, then measurement accuracy can be maintained, but detection time increases significantly (3-5 minutes) and quality control becomes backward
Solution Approach 1:
The patent replaces manual mechanical sampling operations with automated optical detection. The LIBS system uses laser-induced plasma emission spectroscopy to detect metal component composition online, eliminating the need for manual sampling, cooling, grinding, and polishing processes, thereby reducing detection time from 3-5 minutes to real-time measurement while maintaining measurement accuracy through spectral analysis
Solution Approach 2:
The patent introduces an optical path as an intermediary between the metal component and detection system. By using optical fibers and lenses to transmit laser beams and collect plasma emission spectra, the system enables non-contact, real-time measurement without physical sampling, thus resolving the contradiction between measurement accuracy and detection time
2Productivity
If LIBS technology is used for online detection, then detection time is reduced and real-time monitoring is achieved, but measurement precision and stability deteriorate due to environmental interference
Solution Approach 1:
The patent creates an inert gas environment (using nitrogen or argon) around the plasma generation zone to protect the optical path from atmospheric interference. This inert atmosphere prevents absorption and scattering of plasma emission spectra by air molecules, thereby maintaining high measurement precision and stability while enabling real-time online detection
Solution Approach 2:
The patent uses optical fibers and lenses as intermediaries to transmit laser beams and collect plasma emission spectra. These optical components are designed with protective measures to withstand high-temperature environments, enabling real-time detection while maintaining signal quality and measurement precision through controlled optical transmission paths
3Measurement precision
If detection equipment is designed for high precision measurement, then measurement accuracy improves, but device complexity and bulkiness increase, making it difficult to adapt to modern melting production requirements
Solution Approach 1:
The patent segments the detection system into modular components: a compact laser generator, optical transmission components (lenses and optical fibers), and a spectral analysis system. This segmentation allows each component to be optimized independently for precision while reducing overall device complexity and enabling flexible installation in modern melting production environments
Solution Approach 2:
The patent designs a universal LIBS detection system that can measure multiple elements (C, Si, Mn, P, S, etc.) simultaneously using the same optical path and spectral analysis apparatus. This multi-functionality eliminates the need for multiple specialized devices, reducing device complexity and bulkiness while maintaining high measurement precision for various metal components
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
This solution significantly reduces detection time, improves product quality, decreases production costs, and enhances measurement precision and stability, enabling real-time monitoring of difficult-to-measure elements like C, S, and P, while being adaptable to various environmental conditions.
Implementation Method 1
a laser generating module (6) emitting laser beams
Implementation Method 2
A Laser Induced Breakdown Spectroscopy (LIBS) is a technology of using laser for exciting plasma and then using the emission spectra of the plasma for performing element detection and analysis
Implementation Method 3
using the emission spectra of the plasma for performing element detection and analysis
Data Source
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AI summary
An in-situ on-line detection device and detection method for a long-distance metallurgical liquid metal component. The detection device comprises a front-end high-temperature resistant probe (18), a middle-end optical sensing device (19) and a back-end control platform (24), wherein the head of the front-end high-temperature resistant probe (18) is placed in a liquid metal (22), the tail thereof is coaxially connected to the middle-end optical sensing device (19), and an optical window (15) is arranged in the connection position; and the middle-end optical sensing device (19) is connected to the back-end control platform (24) through a signal line (25). The detection device and detection method can provide a timely and valid message for quality control and a melting end, so that the detection time is greatly shortened, the detection distance can be adjusted extensively, the measurement result is accurate, and it can be achieved to measure components that are difficult to measure, such as C, S, P, etc.