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吉林热电厂8号机高压汽缸水平结合面漏泄处理
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作者 吕光 《热电技术》 1997年第2期20-21,63,共3页
关键词 热电厂 蒸汽透平 高压汽缸 漏泄处理
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Wavelet domain adaptive filtering algorithm for removing the seamless pipe noise contained in the magnetic flux leakage data 被引量:1
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作者 韩文花 Que Peiwen 《High Technology Letters》 EI CAS 2006年第2期170-174,共5页
With the widespread application and fast development of gas and oil pipeline network in China, the pipeline inspection technology has been used more extensively. The magnetic flux leakage (MFL) method has establishe... With the widespread application and fast development of gas and oil pipeline network in China, the pipeline inspection technology has been used more extensively. The magnetic flux leakage (MFL) method has established itself as the most widely used in-line inspection technique for the evaluation of gas and oil pipelines. The MFL data obtained from seamless pipeline inspection is usually contaminated by the seamless pipe noise (SPN). SPN can in some cases completely mask MFL signals from certain type of defects, and therefore considerably reduces the detectability of the defect signals. In this paper, a new de-noising algorithm called wavelet domain adaptive filtering is proposed for removing the SPN contained in the MFL data. The new algorithm results from combining the wavelet transform with the adaptive filtering technique. Results from application of the proposed algorithm to the MFL data from field tests show that the proposed algorithm has good performance and considerably improves the detectability of the defect signals in the MFL data. 展开更多
关键词 pipeline inspection magnetic flux leakage data discrete wavelet transform wavelet domain adaptive filtering seamless pipe noise
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Design of hydrogen leakage detection and alarm processing system for the fuel cell power train lab
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作者 刘明基 Cai Zhongqin +2 位作者 Li Xihao Wang Jing Ouyang Minggao 《High Technology Letters》 EI CAS 2011年第2期196-201,共6页
The hydrogen leakage detection and alarm processing system is established for the fuel cell (FC) power train lab to meet the hydrogen safety demand of the FC performance test and examination for the project named "... The hydrogen leakage detection and alarm processing system is established for the fuel cell (FC) power train lab to meet the hydrogen safety demand of the FC performance test and examination for the project named "Research and Development of the Vehicular Technology for the Fuel Cell City Bus" by Tsinghua University. The established hydrogen safety system includes the hydrogen supply system, hydrogen leakage detection system, alarm processing system, ventilation system, measures against electrostatic, thunder-arresting and explosion-protection, and the strict hydrogen operation rules. In this safety system, the explosion proof catalytic combustion sensors are used to detect the hydrogen leakage and the electrical control system is designed to process the alarm automatically. The hydrogen safety system plays an important role in the performance, examination of the FC and the assuring the personnel' s safety of the fuel cell power train lab. 展开更多
关键词 hydrogen leakage detection fuel cell lab fuel cell power-train electrostatic prevention
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