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.
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.
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.
本文即借助MATLAB模糊工具箱来实现模糊控制器的设计，并采用可编程逻辑控制器来实现现场参数的采集和调整。
This article provides the design of the controller with the MATLAB fuzzy toolbox, and the collection of on-the-spot parameters with programmable logical controller.
本文依托于变频调速器和可编程逻辑控制器（PLC）技术，可以有效的把智能控制方法应用于控制现场。
The system is based on frequency conversion velometer and PLC. This paper analyses the construct of the system, and introduces the working theory of position and graphic sensors.
本文依托于变频调速器和可编程逻辑控制器（PLC）技术，可以有效的把智能控制方法应用于控制现场。
The system is based on frequency conversion velometer and PLC. This paper analyses the construct of the system, and introduces the working theory of position and graphic sensors.
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