基于数字音频接口的地震数据采集电路板快速评估方法*

在宽频带数字地震观测技术领域,提出一种基于数字音频接口(S/PDIF接口)的数据采集电路板快速评估方法。该方法在数据采集电路设计过程中,在模拟/数字转换电路的输出端增加了一组S/PDIF数字音频接口,将模/数转换结果转换为符合音频传输标准的编码数据,并将此数据利用外置声卡同步传输到计算机,在计算机上进行数字抽取滤波、频谱分析等数据处理与解析,从而实现对地震数据采集电路板的快速评估。实验结果表明,该方法思路清晰,实现简便,结果有效可靠,能够解决常规测试评估方法中存在的问题,在高精度、高采样率数据采集技术研发和测试评估方面,具有比较强的实用性和应用前景。

A Method for Fast Evaluation of Seismic Data Acquisition Circuit Boards based on Digital Audio Interface

We prosented a method for fast evaluation of seismic data acquisition circuit boards based on digital audio interface in the field of broadband seismic observation technique. During the design process of normal data acquisition circuit,we add an S/PDIF digital audio interface to the analog/digital conversion circuit,to encode the analog/digital conversion results into data that meet audio transfer standard,and to transfer the encoded data to computer via external sound card,and then to perform data process such as digital decimation filtering ,spectrum analysis,etc.,so as to realize fast evaluation of data acquisition circuit board.The experimental results show that this method is clear in thinking, simple in implementation,and the test result is effective and reliable.It can solve problem in routine test evaluation,and has a strong practical and application prospect in the design and test evaluation of high resolution,high sampling rate data acquisition system.