为了排除人为干扰、提高可靠性，采集数据以可编程逻辑控制器为核心，通过现场总线和以太网的多层网络传送至数据库中。

To avoid interfering by work, data were sampled through a multi-layers network which synthesize the field-bus and Ethernet and center on programmable logic controller.

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其中现场端的设计以单片机技术为核心，控制器端的实现以可编程逻辑器件设计技术为核心。

In the field unit the core is Singlechip, and in the central controller is Programmable Logic Device.

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双电网传感器和轨旁控制器一起构成了异物侵限现场监测设备，用来进行侵限事件的传感和逻辑判断。

The dual power network sensor and controller next to the rail constitute a foreign invasion on-site monitoring devices, used for sensing the incident invasion and logic judgement.

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