现场控制

In the process of realizing the remote control of electromotor meter, it probes into the realization of the GPRS wireless collector emphatically which is on the kernel ground. It adopts the means of area-centralizing control to manage the electromotor meters affiliated by it. It communicates with the central control station by GPRS Modem and transmits the commands and data to the instrument by wireless, which makes the collection and transmission of the field data come true. In the process of realizing the remote control of voltage transformer meter, according to the actual requirement, it adopted the chips and modules that are different from the front means to design and realize the GPRS wireless communicating controller corresponding with the devices. It also introduces the mixed—mode Communication integrating the GSM with GPRS to settle the problem that too many GPRS terminals connecting with the central control station synchronously will affect the performance of the central control station.As a whole system, the central control station is the kernel of the digital oil field.

在油田电机表远程控制方案实现中，着重介绍了处于核心地位的GPRS无线集中器的实现，它采用区域集中控制的方式管理下属的石油电机表，与主控站采用GPRS Modem进行通信，与仪表则采用无线电方式进行命令和数掘的传输，实现了现场数据采集传输；在配电变压器表远程控制方案实现中，根据应用需要，采用与前一个方案完全不同的硬件芯片和模块，设计实现了与仪表设备——对应的GPRS无线通信控制器，并针对同时挂接在主控站上的GPRS终端太多会对主控站性能产生一定的影响这个问题，引入了GSM和GPRS相结合的混合通信模式。

Simulation and analysis are made respectively under different situation of delay. Fuzzy adaptive controller that can adjust the system parameters appropriately is designed to minimize the error caused by Network-Induced Delay. Simulation is realized of this controller in NCS. Experiments are carried on the Servo-System based on Field Bus. The results of simulations and experiments indicate that good performance can be achieved with the method presented above.

为改善网络时延给系统带来的影响，设计了可以适当调整控制器参数的模糊自适应控制器，对含该控制器的网络控制系统进行了仿真，并在构建的基于现场总线的伺服系统实验平台上进行了实验，仿真和实验验证了在网络控制系统中使用该算法可以达到满意的控制效果。

Fieldbus and Ethernet are applied to the control system of sluice gate, the three-layer control structure that consists of field, plant and remote control is realized.

将现场总线和以太网技术应用于水电厂闸门控制系统，实现水电厂闸门的现地控制、内集中监控、方监控三级控制。

It also introduces the constitutes and control config uration of thermionic heater system.

叙述了现场总线控制系统在间接式加热炉—热媒炉中的应用，介绍了该热媒炉控制系统组成和控制策略组态。

The main products of our company are LED-column type digital display transmitter, alarm display converter, polling system alarm instrument, intellectual adjusting instrument, flux integrating controller, Q,D instrument, rack-mounted, wall-mounted, clamp type instruments, flashing alarm instrument, three-phase controllable silicon temperature controller, diffused silicon pressure/fluid level transmitter, capacitance voltage/pressure transmitter, thermocouple, thermo-resistance, bimetal thermometer, onsite thermal calibration devices, automation device.

公司主要生产光柱数字式显示变送仪、显示变送报警仪、巡检变送报警仪、智能调节仪、流量积算控制仪、Q、D型操作器、架装式、墙挂式、卡式仪表、闪光报警器、三相可控硅微处理温度控制柜、扩散硅压力/液位变送器、电容式差压/压力变送器、热电偶、热电阻、双金属温度计，现场热工校验装置、自动化成套设备，可广泛地应用于炼油、化工、建材、轻工、冶金、纺织等行业的温度、压力、流量、液位等参数的自动化监测和控制。

In order to meet oilfiled urgent need and in terms of the effective technique way of control bit side force, a flexible deviation control and hole straightening drill assembly is designed by combining error control with perturbance control in the dissertation.

应现场的迫切要求，本文根据控制钻头侧向力的有效技术途径，按扰动控制和按偏差控制结合的方式，设计了柔性防斜纠斜钻具。

After a deep research on the controlled object, Cascade control as the control method is chosen and professional operators 'experience is introduced into the heating control of the sheet.

本文在对被控对象做了深入研究的基础上，采用了串级控制的实现方法，并把现场操作人员丰富的实践经验引入到控制思想中，从而实现了对板材加热的控制。

The parameters of FLC have great effect on the performance of the controller. In general, they are determined by lots of trial on site, which wastes time and is difficult to obtain optimal parameters. In this paper, genetic algorithn is used in the determination of the parameters of FLC.

而模糊控制的三个因子对控制器的性能有很大的影响，常规的模糊控制都是采用人工的多次现场调试来确定，不仅费时，而且也不能得到最优的控制性能。

We can produce all electric control system of electrostatic demists precipitator with different control level, different control type and different hardware configuration and different unit configuration according to the requirements of our custom for improvement of requirements for production of automatic level and unit running reliability.

低压控制系统要求 DCS 控制站留有的 DO ， DI ， AI ， AO 数量由现场仪表及控制设备多少而定。运行状态，实时数据显示及各执行设备的相互连锁，由 DCS 组态完成。

A novel scheme of designing the LD driver based on field programmable gate array is proposed. Employing FPGA as the controlling center, all the functional modules of the LD driver, including AD/DA converting, temperature PID controlling, invariably current driving, LD protection, input and output circuit, are arranged to operate together harmoniously under FPGA.

提出了一种新型的基于现场可编程门阵列技术的半导体激光器驱动电源设计方案，该方案以 FPGA 为控制核心， LD 驱动电源的 AD/DA 转换、温度 PID 控制、恒定电流驱动、LD 保护及人机交互等功能模块电路均在 FPGA 的控制下协调工作。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了