摘要
根据航空瞬变电磁法的原理及其信号特点,按照长时间连续采集和存储的要求,设计了基于LabVIEW的航空瞬变电磁数据采集系统。系统硬件平台以NI PXIe-4492动态信号采集卡为核心,搭配NI PXIe-6674T和NI PXI-6682H等辅助板卡进行搭建;软件部分采用LabVIEW编写,利用生产者/消费者模式,结合用户事件处理循环和队列消息处理器,实现了数据连续采集、存储、实时处理及显示的功能,并解决了发射和接收时钟不同步的问题。最后实验表明,该系统能够长时间稳定采集,并且各项性能满足设计要求。
According to the principle of aero-transient electromagnetic method and its signal characteristics, according to the requirements of long-time continuous acquisition and storage, an airborne transient electromagnetic data acquisition system based on LabVIEW is designed. System hardware platform with NI PXIe-4492 Dynamic signal acquisition card as the core, with Ni pxie-6674 t and NI pxi-6682 h and other auxiliary board to build; the software part uses LabVIEW to write, using producer/consumer mode, combined with user event processing loop and queue Message processor, realizes the function of data continuous collection, storage, real-time processing and display, and resolves the issue that the transmit and receive clocks are out of sync. Finally, the experiment shows that the system can be collected stably for a long time, and the performance satisfies the design requirements.
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