通讯系统

Secondly, the paper introduced how to implement safety detection by ultrasonic sensor, and presented systemically all the design of collecting and processing signals, storage circuit, lithium battery charging and discharging circuit, data communication circuit, keypads and LCD. This paper studied the code of uC/OS-II and introduced how to port uC/OS-II onto LPC2214. The Real-Time Kernel uC/OS-II is a highly portable, ROMable, very scalable, preemptive real-time, multitasking kernel for microprocessors and microcontroller.

然后论文具体介绍了如何实现超声波传感器进行实时安全监测，并系统的介绍了超声波监测系统的信号采集，处理，存储电路，锂电池充放电控制电路，数据通讯电路，键盘，显示器等的设计；也详细的介绍了多任务操作系统uC/OS-II的源代码及如何在LPC2214上移植等。uC/OS-II是一个移植方便的、可固化的、可裁剪的、占先的多任务实时内核。

Alex has detailed knowledge on building server rooms and networking systems for such companies as the world's largest mining website.He has experience with low speed data networking and global positioning systems and is now building WlFI and high-speed point-to-point networks for Ratel tv'fobile Communications Ltd. He also is a Business Development Manager in Ratel.

亚历克斯·施瓦茨不仅对制造服务器及网路系统有极丰富的知识，曾为世界最大的矿业公司建造网页，而且对低速数据网路及环球定位系统经验丰富，目前正为利达流动通讯公司建造WIFI及告诉点对点网路。

Nowadays, the Data-Acquiring Technology is used in many fields such as Analytical Instrument, Geology Reconnoiter, Medical Treatment Instrument, Radar, and Communication etc.

近年来，对于数据采集系统的要求与日俱增，数据采集系统有着非常良好的应用前景。如今的数据采集技术已渗透到分析仪器、地质勘探、医疗器械、雷达、通讯、测控等技术领域。

Products for laptop, power supply, uninterruptible power systems, network facilities, servers, appliances, audio amplifier system, communications equipment, car refrigerator, car equipment, instrumentation, mechanical equipment cooling ventilation.

产品适用于笔记本电脑、电源、不断电系统、网络设施、服务器、家用电器、音响功放系统、通讯设备、汽车冰箱、车载设备、仪器仪表、机械设备之通风散热。

For the WiNCS based on the IEEE 802.15.4/Zigbee communication protocols stack, the different time delay components of the total round-trip time delay in this WiNCS are identified. The experimental studies on a WiNCS prototype testbed are used to analyze the impact of the various factors on the total round-trip time delay.

分析了利用IEEE 802.15.4／Zigbee通讯协议所实现无线网络控制系统中延时的组成，在此基础上，以实验手段探讨了不同网络因素对网络控制系统延时的影响。

The main content of the dissertation is designing and realizing the total scheme and frame of system software. The module of the input and output is designed by using the generally I/O of the multichannel buffered serial port to simulated the communication of I~2C bus. The Ping-Pong buffer is brought forward to resolve the problem of the data rate matching. The logic switch function is designed in the programmed logic devices. The data transmission rate is improved by using the DMA and the dual buffer mechanism. The system program self-loading is realized by the design of the self-leading program. Lastly, the dissertation analyzes the characteristic of LLL video and experimentalize with some typical image processing algorithm.

主要对系统软件的总体方案与框架结构进行设计实现，内容包括利用通用串行口模拟I~2C通讯实现输入／输出模块的设计，提出乒乓缓冲结构来解决数据的速度匹配问题，利用可编程逻辑器设计完成逻辑切换控制功能，利用DMA并行传输方式并设计双缓冲结构提高数据的传输速度，设计自引导程序来实现系统程序自加载，最后深入探讨了微光视频图像的特征说明了几种典型的微光图像处理算法的原理，参考这些处理算法设计能在高速视频图像处理器上实现的软件方法，并做了一部分相关的实验研究。

The description of network delays including characteristics and effects are also covered and the uniformed mathematic models for NCSs with four different structures are derived. Furthermore, the controller basing on state prediction and compensating time delay is designed. Sufficient and necessary stability conditions for systems with different transmission policies such as perfect transmissions, delayed transmissions and time-varying transmissions are obtained as simple eigenvalue tests of certain test matrices. And in the end, effects of model error over maximum communication interval are analyzed. Numerical examples show the feasibility and efficiency of the proposed methods.

首先介绍了网络控制系统中数据包的传输情况以及基于模型结构方法的基本思想，并针对四种不同拓扑结构的控制网络分析了网络时延的性能，进而给出了统一的数学模型；然后，提出了基于状态预测的具有时延补偿功能的状态反馈控制器的设计方法，并针对完美传输、延时传输及时变传输三种数据传输策略，分别研究了控制系统的稳定性问题；最后分析了模型误差对最大通讯间隔的影响；仿真结果表明了设计及控制方法的正确性和有效性。

It is consisted of a master station, which is a computer with intelligent CAN-bus interface unit, and a slave station, which is a monitor module for battery parameter measure.

本系统是一种新型在线监测系统，它由带CAN通讯适配卡的主站和用于蓄电池参数测量的从站—监测模块组成。

The complet block design and the come true scheme of SCADA system afer inported OPC technology was decribed in this paper. Also the function of the slave station、 communication network、 control center was been developed and carried out in this paper.

论文中介绍了引入OPC技术的SCADA系统的整体设计及实现方案，完整的开发并实现了SCADA系统的从站、通讯网络及控制中心的功能。

Focus of designation was fuzzy control of themost important parameters of boiling sugar — supersaturation and optimize it for a while. It is studied that DCS boiling sugar control and network communication control system, etc.

重点设计了煮糖过程中最重要的参数—过饱和度的模糊控制及对它进行的优化、对煮糖DCS系统的控制方式、控制系统网络通讯等进行了研究。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。