Development and Application of Laser Imaging System for Leaky Testing of SF6
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摘要: 介绍增强型六氟化硫激光检漏成像仪的设计、研制与应用结果。在已有的SF6激光检漏成像仪的基础上, 利用图像信号处理等技术, 对红外探测器接收的图像进行背景信号消隐, 并对气体泄漏的信号进行增强处理, 灵敏度大大提高。以视频显示六氟化硫微小漏点, 可测得微小泄漏量10-3 cm2/s。可在带电状态下对SF6开关及气体绝缘全封闭配电装置实施准确、快捷的检测。为保证电气设备和电网安全稳定运行, 并降低SF6气体泄漏污染提供了有效检测手段。Abstract: The design, manufacture and application of improved laser-infrared imaging system for leaky inspection of SF6 were presented. On the basis of previous laser-infrared imaging systems for leaky inspection of SF6, advanced pattern processing techniques were used to improve the patterns of laser irradiation and infrared imaging, including eliminating the background pictures and then enhancing the dynamic images of the SF6 leakages. Utilizing the digital signal processing, small and weak leakages of SF6 could be clearly displayed in the real-time video, which prominently increases the detective sensitivity, which could be less than 10-3 cm2/s. Therefore, the improved laser imaging system was an effective instrument for inspecting SF6 leakage to guarantee safe operations of electric power instruments and networks, and also to decrease environmental pollution induced by SF6 leakages.
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Keywords:
- Leakage testing /
- Laser imaging /
- Pattern processing
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[1] McRae T G. GasVue VOC and SF6 leak location field test results[C]// SPIE Conference on Environmental Monitoring and Remediation Technologies, Society of Photo-Optical Instrumentation Engineers, Bellingham: WA, [s.l.]: [s.n.], 1999: 196-212. [2] Fischer J. GasVue SF6 inspection of florida power & light switchgear[C]// Conference on SF6 and the Environment: Emission Reduction Strategies, US: EPA, 2000. [3] 田勇, 阎春生, 孙立时.利用激光成像技术定位检测SF6设备气体泄漏[J].东北电力技术, 2005(12): 35-37.
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