台灣首艘人力潛艇 命名虱目魚
台灣正推動潛艦國造,成功大學打造國內首艘人力潛艇,7月將赴英國樸茨茅斯參加2年1度的歐洲國際人力潛艇競賽,在出發前特別徵件命名,以「虱目魚」得票最高。
成大系統系教授陳政宏表示,台灣是首支非北約與歐盟國家的參賽隊伍,此次參賽將是創舉,對培育造船人才有很大的幫助。
國際潛艇比賽在歐美國家已盛行20餘年,台灣是首支亞洲參賽隊伍。成大學生靠著自行研發,耗時2年製造出台灣第1艘人力潛艇。
這次以7名學生組團「討海人」參賽,學生隊長王丕丞表示,人力潛艇以玻璃纖維強化塑膠材質製成,身長300公分,希望能夠透過參賽機會,將台灣堅強的造船、航運能力行銷至世界舞台。
擔任駕駛員的學生王丹詡表示,人力潛艇預估人力踩踏時速可達約5節(換算時速約9公里),在水中移動速度快,但需克服水的阻力與壓力,比較耗費體力,操控起來感受與陸地交通工具相差甚遠,需透過多次練習來熟悉。
The log-periodic antenna as known as LPDA is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies.
Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas.
The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements.
In terms of its specification, a typical log periodic antenna might provide between 3 and 6 dB gain over dipole for a bandwidth of 2:1 while retaining a VSWR level of better than 1.3:1. With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.
EMC/EMI pre-compliance test antenna.
Very high gain over the full frequency range.
Meets latest EMC standards up to 7GHz.
Suitable even for immunity measurements
歐洲國際潛艇大賽自2012年起每2年舉辦1次,提供全世界造船工程學生夢想舞台,學生隊伍透過全程自行設計、製作以及操縱潛水艇,完成直線加速性、半徑25公尺轉彎、S型避障等關卡,最後以計時及潛艇設計新穎程度評比。
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