光信号自动拾取丝扫描测量系统设计

摘要

A beam automatic detection wire scanner system was developed to improve the measurement resolution and shorten the data processing time.The system managed the sampling process by multi-process priority mechanism,using Allen function to amplify signal variation characterization after signal processing.Fitting range was recognized based on short time average/long time average and Akaike information criterion,and fitting parameter initial values were determined by energy gradient curve.It is found that the system detects beam accurately and improves the measurement resolution and shortens data processing time.%为了提高同步辐射丝扫描探测器的测量分辨率与缩短数据处理时间,设计了光信号自动拾取丝扫描测量系统.该系统采用多进程优先级机制管理采样过程,对信号进行降噪处理后使用Allen函数对信号幅度变化特征进行放大,长短时平均法与赤池准则结合拾取光信号,自动确定拟合区间,同时采用能量变化法对高斯拟合参数初值进行估测.经实验验证,该测量系统拾取光信号位置准确,可有效提高丝扫描探测器的测量分辨率,缩短数据处理用时.