针对目前我国省级区域数字测震台网所运行的JOPENS系统,利用Matlab语言开发了采用功率谱概率密度函数的背景噪声计算分析软件.实现了对数字地震台网的数据记录质量、观测系统的健康状态以及背景噪声源变化的准实时监控,计算结果的有效频带范围为90 s～35 Hz,对信号的最小分辨率约为0.012 Hz.软件根据功能需求进行模块化设计,并通过TaskContral定时任务控制终端来进行控制和管理,以减少各模块之间的相互联系,从而保证软件运行的持久和稳定.2011年1月在江苏省数字地震台网进行实际部署,运行情况和实际效能均良好.%Combining with the running JOPENS system in provincial regional digital seismic network in China,using the power spectrum probability density function,we develop the background noise calculation analysis software based on Matlab platform.The software achieves the quasi-real-time monitoring of data recording quality,the health status of observation systems and the variation of background noise sourcein the digital seismic network.The effective frequency range of signal is from 90 s to 35 Hz and the minimum resolution of it is about 0.012 Hz in the calculating result.In order to ensuring the lasting and stable of the software running,the software adopts the modular design based on functional requirement,the "TaskContral" timing task control terminal is used to control and manage modular for reducing the inter-linkages between the each modules.The background noise calculation analysis software was deployed to Jiangsu Digital Seismic Network since Jan.,2011,and its running situation and actual effectiveness was well.
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