摘要
高采样率和宽动态范围是提高数据采集仪性能的关键指标。对拓宽采集仪的动态范围的方法进行了研究,提出了基于虚拟多核数据采集技术来拓宽低位A/D芯片的动态范围的方法。此方法通过软件对A/D转换的数据进行多次重采样,间接提高了采集仪的动态范围。基于此方法和16位A/D芯片开发出了虚拟3核数据采集仪。测试结果表明此采集仪具有高采样率和宽动态范围的性能,可用于实际测试。
High sampling rate and wide dynamic range are the key indexes in improving the performance of data acquisition instrument. The methods to broaden the dynamic range of data acquisition instrument are researched, and the method based on virtual multi-core data acquisition technology to broaden the dynamic range of low A/D chip is proposed. Software is used in this method to multisampling the data converted by A/D, and to indirectly increase the dynamic range of the instrument. Virtual 3-core data acquisition instrument is developed based on this method and 16 bit A/D chip. The test results show that the new instrument features high sampling rate and wide dynamic range, and is feasible in practical tests.
出处
《自动化仪表》
CAS
北大核心
2012年第8期81-83,共3页
Process Automation Instrumentation
基金
中国地震局教师科研基金资助项目(编号:20090106)
关键词
数据采集仪
动态范围
采样率
多重采样
虚拟多核
A/D芯片
Date acquisition instrument Dynamic range Sampling rate Multisampling Virtual multi-core A/D chip
