微弱信号检测在电流测量中的研究与仿真  

The simulation and analysis of weak signal detection in OCT

作　　者：周艳平 

机构地区：[1]安康市计量测试所,陕西725000

出　　处：《中国科技博览》2010年第23期66-66,共1页China Science and Technology Review

摘　　要：准确度和稳定性是光学电流互感器（OCT）的主要性能指标，但现有的OCT所测得的光电信号会受到外部干扰和内部元器件的固有噪声等影响，其主要是光电探测系统中的噪声，严重时反跌电流信息的微弱光电信号将淹没在强噪声背景中，降低了光学电流互感器的测量精度。针对该问题，本文通过Labview平台仿真了数字式锁定放大器在光学电流互感器中的微弱信号检测，并分析了仿真结果。Accuracy and stability are the main performance indexes of Optical Current Transformer. However, the useful slight photoelectric signal influenced by external interference and inherent noise of internal components, especially by the noise in photo- electric detection system, will be submerged in background noise, which lead to the measurement precision of OCT being reduced. Aiming at this problem, the paper adopts the Digital Lock-in Amplifier to detect the slight photo-electric signal, simulates the photoelectric detection system based on the platform of Labview,and analyzes the simulation results,

关 键 词：光学电流互感器 数字式锁定放大器 信号 LABVIEW 

分 类 号：U283[交通运输工程—交通信息工程及控制]