The invention provides a zoom lens system, which comprises a zooming unit, a compensating unit and an imaging unit arranged on a same optical axis in turn, a driving transmission mechanism and a micro-processing control unit, wherein the driving transmission mechanism comprises a zooming stepping mo.....
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The present invention relates to a strain gauge having a conductive fluid made of a glycerin/aqueous salt mixture, and methods of making the strain gauge. The strain gauge comprises a polymer sleeve; a fluid piezoresistive material made by the glycerin/aqueous salt mixture; a metal tube, a metal con.....
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The invention discloses a reactive power compensator, aiming at solving the problem of weak power factor in a power distribution system, which comprises: a DC capacitor used for imitating an AC capacitor or a reactor to generate reactive power compensation current; a solid-state switch and a high-fr.....
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本实用新型揭示了一种手机无线输入装置，包括手机本体和蓝牙接收器，所述蓝牙接收器连接被输入装置，所述手机本体内设有基带芯片、手机全键盘以及蓝牙通讯模块，所述手机本体的顶部设有连接状态指示灯，所述基带芯片分别连接所述手机全键盘、连接状态指示灯以及蓝牙通讯模块，本实用新型的手机无线输入装置通过蓝牙传输数据，手机端的按键需要按照标准的全键盘设计，这样就可以用全键盘的手机，实现PC机的无线键盘输入功能了。
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