摘要
介绍了光学玻璃ECT的工作原理,并针对光学玻璃ECT存在的精度问题,分析出光探测器直流偏置会导致比差超限。简要说明了光电二极管原理及电流-电压转换电路,进一步探讨会导致光探测器产生直流偏置的原因及解决办法,测试证明,设计的光探测器能满足光学玻璃ECT精度要求。
This article introduces the working principle of optical glass ECT and analyzes the accuracy of optical glass ECT,which indicates that the DC bias of the photodetector will lead to contrast overrun.A brief description is given of the photodiode principle and current-voltage conversion circuit,and a further discussion is made of the causes of the photodetector DC bias and its solutions.The test proves that our light detector meet the system accuracy requirements of optical glass ECT.
出处
《电子科技》
2013年第8期38-41,共4页
Electronic Science and Technology
