Vacuum Switch Sensitivity via Metal Nanoparticle Coating
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Solution Overview
Problem
Current online vacuum degree testing methods for vacuum switches suffer from low sensitivity and high noise interference, making them inadequate for precise measurements in fields with high requirements for accuracy.
Innovation Solution
A method involving the application of a water-soluble metal nanoparticle reagent on the target material of a vacuum switch, followed by laser-induced breakdown spectroscopy (LIBS) to generate plasma and analyze the plasma spectrum for determining the vacuum degree, thereby enhancing sensitivity and reducing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional LIBS technology is used for online vacuum degree testing, then the testing can be performed without taking the vacuum switch out of operation, but the sensitivity is low and noise interference is high
Solution Approach 1:
A water-soluble metal nanoparticle reagent is introduced as an intermediary substance on the target material surface. The nanoparticles serve as a mediator between the laser beam and the target material, enhancing the plasma generation efficiency and signal intensity while reducing noise interference, thereby improving measurement sensitivity without requiring the vacuum switch to be taken out of operation
Solution Approach 2:
The patent changes the physical and chemical parameters of the target material surface by applying a metal nanoparticle coating. This modification alters the optical properties and plasma characteristics, enabling enhanced signal detection and improved vacuum degree measurement sensitivity in online testing conditions
2Productivity
If laser pulse is used to bombard the target material to generate plasma, then the vacuum degree can be measured in real-time, but the signal-to-noise ratio is low and testing limits are high
Solution Approach 1:
The water-soluble metal nanoparticle reagent acts as an intermediary that enhances the laser-plasma interaction. The nanoparticles absorb laser energy more efficiently and generate stronger plasma signals, thereby improving the signal-to-noise ratio while maintaining real-time testing capability without compromising productivity
Solution Approach 2:
The patent creates a composite structure by combining the metal nanoparticle reagent with the target material surface. This composite material exhibits enhanced optical and plasma properties, enabling stronger signal generation and improved measurement precision while preserving the real-time testing advantage
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 method significantly improves the signal-to-noise ratio of the plasma signal, lowers testing limits, and enhances the repeatability of vacuum degree measurements, addressing the limitations of traditional LIBS technologies.
Implementation Method 1
bombarding, by using laser pulse, the surface of the target material where the metal nanoparticle coating is formed, so as to generate plasma on the surface of the target material
Implementation Method 2
generate plasma on the nanosecond timescale and sub-millimeter spatial scale on a surface of the shield
Implementation Method 3
smearing a water-soluble metal nanoparticle reagent evenly on a surface of a target material of a to-be-tested vacuum switch, performing standing and forming a metal nanoparticle coating on the surface of the target material
Implementation Method 4
measures a laser-induced plasma signal (including Cu, N, H, O atomic radiation spectra) to reflect the vacuum degree
Data Source
AI summary
Disclosed is a method for improving sensitivity of vacuum testing of a vacuum switch, including the following steps: S100: smearing a water-soluble metal nanoparticle reagent evenly on a surface of a target material of a to-be-tested vacuum switch, performing standing and forming a metal nanoparticle coating on the surface of the target material; S200: bombarding, by using laser pulse, the surface of the target material where the metal nanoparticle coating is formed, so as to generate plasma on the surface of the target material; S300: obtaining a plasma image by collecting the plasma, and obtaining a plasma spectrum by performing spectroscopic analysis on the plasma image; and S400: obtaining a vacuum degree of the to-be-tested vacuum switch based on the plasma spectrum. The present disclosure can effectively improve a laser focusing degree and laser pulse stability and reduce noise interference, so as to lower testing limits and improve the sensitivity of online vacuum testing of the vacuum switch.