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本文提出了一种用线阵ＣＣＤ非接触实时测量塑料导线直径的仪器，它有如下特点：（１）采用了对被测目标所发出的烟雾不敏感的光学系统，提高了测量精度；（２）采用工作于脉冲方式的大功率近红外ＬＥＤ做照明光源，其寿命比采用白炽灯作为光源大为增长，同时缩小了体积并有利于抑制可见光的干扰；（３）对电信号采用了两级滤波、直流恢复、自适应阈值二值化等处理技术；（４）采用定标的方法来消除目标位置移动的影响，提高了测量精度，降低了加工装配精度要求。现场使用证明，它能长期可靠地工作，总的测量误差小于±０．０２ｍｍ。
This paper presents a non-contact linear CCD sensor for measuring the diameter of plastic wire instruments, which has the following characteristics: (1) the use of the smoke emitted by the target is not sensitive to the optical system to improve the measurement accuracy; (2) ) The use of high-power pulsed mode near-infrared LED lighting source, its life expectancy than using incandescent lamps as a source of great growth, while reducing the volume and is conducive to inhibiting the interference of visible light; (3) on the electrical signal using two Filtering, DC recovery, adaptive thresholding and other binary processing techniques; (4) The use of calibration method to eliminate the impact of the target position to move to improve the measurement accuracy and reduce the machining assembly accuracy requirements. Field use shows that it can work long-term reliable, the total measurement error is less than ± 0.02mm.