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本文简述了电涡流传感器检测电导率的工作原理，结合对铝硅合金材质的分析与检测实例，分析了合金中硅晶体的形状及分布对电导率改变的影响、并探讨了电涡流传感器信号与铝硅合金材质的相关性，电涡流传感器对铝硅合金材质检测的方法及影响电涡流传感器信号的因素，检测仪表的设计，制造和应用。
实用的仪表已被设计和制作：差动变压器式电涡流传感器在低频振动器电路驱动下，输出标准试样的与被测试样的差值信号，经放大、整流、A/D转换后经单片机处理，最后由单片机发出信号启动对应于变质级别数的显示器。仪表显示值与试样金相组织之间相关系数r=0.934，误差区间+0.931。

The job principle of measuring the rate that leads electricity of the sense machine that this text sketches the cable whirlpool and spreads , Combine it to silicon alloy material quality analysis of aluminium and instance of measuring , Have analysed the form of silicon crystal in the alloy and distributed to influence 、 changed of rate that leads electricity, The silicon alloy material quality dependence of the signal and aluminium of the sense machine that and probed into the cable whirlpool and spread, The factor of signal of the sense machine that method and influence cable whirlpool measured to the aluminium silicon alloy material quality spread of the sense machine that the cable whirlpool spreads , Measuring design of the instrument, the manufacture and application.
The practical instrument has already been designed and made : Work up transformor whether type spread sense machine whether at low frequency vibration machine urge and down circuit by electricity whirlpool difference, The ones that exported the standard sample were with testing the difference value signal of style , Through enlarging、rectification、A / D Dealt with by the one-chip computer after changing, sends out signals and starts the corresponding display of the rank number going bad the single slice of machines at the end . 0.934 of coefficient correlation r= while organizing in metallography with the sample of value that shows instrument, Interval + of error is 0.931.