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本期论文广场栏目中,油站等三险地区的手机信号屏蔽器设计一文,介绍了一种低成本的防爆防水型手机信号屏蔽器。系统由锯齿波发生器、压控石英振荡器(VCXO)、射频功放等三部分构成。可产生干扰信号,使手机无法检测出从基站发出的正常数据,从而无法与基站建立连接,避免加油站及油库等重大三险之处发生险情。基于Ansys的电动截止阀的应力和抗震分析、长冲程抽油机机械换向装置研究现状与发展、一种TLP钢管桩疲劳设计方法
This section of the essay plaza column, petrol stations and other three areas of mobile phone signal jammer design article, introduced a low-cost explosion-proof waterproof mobile phone signal jammers. System consists of sawtooth generator, quartz oscillator controlled (VCXO), radio frequency power amplifier and other three parts. Can produce interference signals, so that the mobile phone can not detect the normal data sent from the base station, and thus can not establish a connection with the base station to avoid gas stations and oil depots and other major risks at risk. Ansys-based electric shut-off valve stress and seismic analysis, long stroke pumping unit mechanical commutation device research status and development, a TLP steel pipe pile fatigue design method