The layering thought of development of data acquisition unit is adopted. The protocol on application level and the PC software are designed.

数据采集器采用了分层开发的思想，设计了完善的应用层协议，同时设计了简明易用的PC机软件。

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Secondly, it keeps the low coupling and high cohesion virtue of layers in protocol stack after adding cross-layer design, so as to keep the OSI layering architecture.

其次，它使加入跨层设计后的网络协议栈每个层仍具有高内聚、低耦合的特征，从而保持了网络协议栈良好的软件架构。

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