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Old 08-10-2008, 05:18 PM
shoescity shoescity is offline
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Old 08-11-2008, 11:18 AM
cdef012 cdef012 is offline
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Smile 风速仪

热球式电风速仪构造原理 是一种能测低风速的仪器,其测定范围为0.05-10m/s。风速仪是由热球式测杆探和测量仪表两部分组成。探头有一个直径0.6mm的玻璃球,球内绕有加热玻璃球 用的镍铬丝圈和两个串联的热电偶。热电偶的冷端连接在磷铜质的支柱上,直接暴露在气流中。当一定大小的电流 通过加热圈后,玻璃球的温度升高。风速仪升高的程度和风速有关,风速小时升高的程度大;反之,升高的程度小 。升高程度的大小通过热电偶在电表上指示出来。根据电表的读数,查校正曲线,即可查出所的风速 (m/s)。 红外测温仪器主要有3种类型:红外热像仪、红外热电视、红外测温仪(点温仪)。红外测温仪由光学系统、光电探测器、信 号放大器及信号处理、显示输出等部分组成。光学系统汇集其视场内的目标红外辐射能量,视场的大小由测温仪的 光学零件以及位置决定。红外能量聚焦在光电探测仪上并转变为相应的电信号。该信号经过放大器和信号处理电路 按照仪器内部的算法和目标发射率校正后转变为被测目标的温度值 噪音计是声学(噪声)测量的基本仪器,它按照一定的频率记权和时间记权来测量声音的噪音计又分为: 数字式噪音计 积分式噪音计 时代TR100粗糙度仪仪采用优化的电路设计及传感器结构设计,将电箱、驱动器及显示部分合为一体,使其达到高度集成化;任意选择 Ra、Ra测量参数;不仅可测外圆、平面、锥面,还可测长宽大于80×30mm的沟槽。 超声波测厚仪体积小巧,功能丰富:CL5精密测厚仪具有功能全面、使用简便、体积小巧和结构牢固的优点。超声波测厚仪位 于显示屏正下方的3个软键启动所显示菜单上的各种功能。超声波测厚仪利用四个方向键可以简单而高效地切换菜 单和浏览文本输入画面。超声波测厚仪图形显示为用户提供了6种不同的操作模式。超声波测厚仪用户可以在常规 、最小值扫描、最大值扫描、差值/减薄率、厚度+A扫描(选件)或声速测试(选件)中进行选择。
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