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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >A pilot study on the vacuum degree online detection of vacuum interrupter using laser-induced breakdown spectroscopy
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A pilot study on the vacuum degree online detection of vacuum interrupter using laser-induced breakdown spectroscopy

机译：真空灭弧室真空度在线检测的激光诱导击穿光谱学的初步研究

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摘要

Vacuum degree online detection of vacuum interrupter has been a great challenge for decades. In this letter, a novel approach based on laser induced breakdown spectroscopy (LIBS) was proposed to solve this tough problem, which is suitable for non-intrusive, electro-magnetic interference free and remote detection. The spectral lines of Cu, H, N and O elements from the interrupter shield were detected for a large gas pressure range from p = 1 x 10(-3) Pa to 1 x 105 Pa. It was found that the spectral intensities of O and H increase monotonically with gas pressure, in contrast the spectral intensity of Cu first decreases slightly and then increases. Their intensity ratios, especially for that of Cu to O, change dramatically and monotonically with the gas pressure when p <= 0.1 Pa, indicating that they can be used for determining the vacuum degree values. Spectral ratio method fundamentally reduces the influences of the possible variation in measuring distance and the laser power fluctuation, making LIBS a promising method for vacuum degree online detection of vacuum interrupters.
机译：真空灭弧室的真空度在线检测是数十年来的巨大挑战。在这封信中，提出了一种基于激光诱导击穿光谱法（LIBS）的新颖方法来解决这一难题，该方法适用于非侵入式，无电磁干扰和远程检测。在从p = 1 x 10（-3）Pa到1 x 105 Pa的大气压范围内，检测到了来自灭弧室护罩的Cu，H，N和O元素的光谱线。发现O的光谱强度H的含量随气压的增加而单调增加，而Cu的光谱强度则先下降然后增加。当p <= 0.1 Pa时，它们的强度比（特别是对于Cu与O的强度比）会随着气压急剧单调变化，这表明它们可用于确定真空度值。光谱比方法从根本上减少了测量距离可能变化和激光功率波动的影响，使LIBS成为一种在线检测真空灭弧室真空度的有前途的方法。

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