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阀门检查步骤

发布者:admin发布时间:2018-07-06 10:34:55点击量:654

 检测技术涉及的内容很,但在化工生产中.常见的被测量类型有热工量(温度、压力、物价、流量)、机械量(位移、转速、振动等)、物质的性质和成分量〔浓度、组分含量、酸碱度

等)、电I旦(电压、电流、功率、电阻等)等。为了便于传输、处理和吊示.对于非电量的被测参数通常转换成的电气、历力、光等信号类则。

    ①常用的电气信号有电乐信号、电流信号、阻抗倍号和频率信号等。电气信号传送快、滞历小.可以远xF离传送。便于和计算机联接,其应用越来越广泛。日前,大多数传感器是将被测参数的变化转换为电信号,发展非常迅速。

    ⑦压力信号包括气压信号和液压信号。液压信号多用于控制环节。在气动检测系统中。以净化的佃压空气为能源,气功传感器或气动变送器格被测参数转换为与之相应的气压信号.经气动功率放大器放大.可以进行显示、记录入算、报警或自动控制。

    ⑤光信号包括光通虽信号、干涉条纹信号、衍射条纹信号等。随着激光、光导纤维和计量光栅等新兴技术的发展,光学枪测技术得到/f日大的发展。特别在高精度、非接触测量方面.光学检测技术正发挥着越来越重要的作用。

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