查询词典 closed circuit television

Then the intellectual control technology of vacuum circuit breaker is discussed particularly. As a control object, the bi-stable permanent magnetic actuator is separated into basic principle so as to determine the nature of the whole. The direct-coupled models of magnetic fields for analysis and for calculation are presented. The static and dynamic characteristics of the models and dynamic behavior analysis and matching analysis for the vacuum circuit breaker with bi-stable permanent magnetic actuator are also discussed. For a further study, fuzzy neural network control technology based on synchronized-closing operation of vacuum circuit breaker is analyzed and the research conclusion is used for realizing the synchronized-closing of vacuum circuit breaker in the future.

论文首先分析了永磁机构的结构和工作原理；然后主要针对双稳态永磁机构真空断路器分析了在开断和关合过程中的静态磁场耦合模型、动态分析数学模型和真空断路器的动态特性，并就永磁机构和真空断路器的匹配进行了分析；最后分析了基于双稳态永磁机构真空断路器的同步操作问题，深入研究了同步操作的模糊控制原理和算法，研究结果为最终实现永磁机构真空断路器的同步操作奠定了基础。

In the motor drive controller, current sampling cir- cuit protecting circuit, pressure adjusting circuit and signal insulating circuit are made up of DSP and its peripheral circuit. CPLD is employed to deal with the brushless DC motor＂ s rotor position signal in order to realize.

电机驱动控制器采用微控制芯片和外围电路构成了电流采样、过流保护、压力调节等电路，利用CPLD实现无刷直流电机的转子位置信号的逻辑换相。

The powering method of 1-Wire technique temperature sensor is expounded, Using 1-Wire technique temperature sensor, real time circuit, keyboard and display circuit, serial storage circuit, RS485 communication cir- cuit and watch-dog circuit make up of the hardware for fire alarm system.

利用1-Wire总线技术使用多个数字温度传感器，实时时钟电路，键盘显示电路，串行存储器电路，RS485通信电路以及看门狗电路等，组成了火灾报警系统硬件系统。

The paper discuss the main circuit and control circuit structure of the active power filter, according to the main circuit divided into two different kinds of structure that are four-phase convertor and three-phase convertor, this paper do deep research on each work theory and control circuit, provide each control method and DC side voltage control method.

论文讨论了在三相四线制系统中有源电力滤波器主电路及控制电路的构成，就主电路分别为四相变流器和三相变流器两种不同结构方式的工作原理和相应的控制电路进行了深入的研究，提出了各自的控制方法以及相应的直流侧电压控制方法。

PYX1-S type signal power supply panel is a special equipment for eight in formation automatic block with audio frequency shift modulated track circuits.It can supply power for signal lighting,track circuit,audio frequency shift relay circuit,approaching circuit,audio frequency shift control and detecting circuit.

PYX1-S型八信息移频电源屏是八信息自动闭塞的配套设备，可为信号点灯、轨道电路、移频继电器电路、接近电路移频控制检测电路提供电源。

On the hardware electric circuit, uses MAX232 torealize PC machine and between the monolithic integrated circuit leveltransformation, uses the simple 3 systems connection methodrealization correspondence, soon PC machine and the monolithicintegrated circuit transmission data end and the receive data endcross connection, two groundings direct are connected; In the softwareprogramming, on PC machine was uses the existing string mouth to debugassistant software, the monolithic integrated circuit carries on theprogramming using the assembly language.

在硬件电路上，采用MAX232实现PC机与单片机之间的电平转换，采用简单的3线制连接方法实现通信，即将PC机和单片机的发送数据端与接收数据端交叉连接，两者的地线直接相连；在软件编程上，PC机上是采用了现有的串口调试助手软件，单片机则利用汇编语言进行编程。

Backup busbar to which any circuit can be connected independently of its bay equipment (circuit-breaker, instrument transformer), the control of its circuit being ensured by another specific bay available for any circuit.

旁路母线 Transfer busbar 能与任何回路独立连接的一种备用母线，其回路间隔设备适用任何回路，此回路的控制由另一专用间隔确保。

For transformers, circuit breakers to contact the two into line within the circuit breaker for the bridge connection, contact the circuit breakers in the two into line outside the circuit breaker for the bridge connection.

针对变压器，联络断路器在两个进线断路器之内为内桥接线，联络断路器在两个进线断路器之外为外桥接线。

Firstly it introduces relevant technical developments and trends, the task background and significance of the study, then analyzes hardware circuit of using image sensor as images collected, and utilizes the SAA7113 chip to deal with video image beforehand, SAA7113 lets the output of standard digital video signals to storage in FIFO memory, and decodes clock signals, Highlighted microprocessor control external circuit design of false coin and counting, and DSP control external circuit design, such as memory expand ect;Finally analyses CPLD as logic controller to control the logic and scheduling of some part ,and gives the undee emluator of some logic circuit.

文章首先阐述人民币智能分捡器相关技术的发展状况、发展趋势以及课题背景与研究意义；然后设计了利用图像传感器采集人民币图像输出模拟视频信号的硬件电路，以及利用视频解码芯片(SAA7113)对模拟视频图像进行预处理，SAA7113输出的标准数字视频信号存入FIFO存储器，同时还解码输出场、行同步信号、像素时钟信号送入CPLD等部分电路；重点设计了单片机控制验钞、点钞等外围电路，以及DSP控制的外围电路，如存储器的扩展等部分；最后完成CPLD对部分器件的逻辑和时序控制设计，并对逻辑电路的功能进行仿真，仿真结果令人满意。

On the basis of the existing sieving method of sieving thyratrons, serving the typical fuze detonating circuit as the circuit of sieving thyratrons, and applying the operation conditions of the typical fuze detonating circuit in the sieving circuit, we can measure more accurately the turn on voltage, trigger voltage, turn on time, and leak of electricity of the thyratrons.

在现有闸流管检测方法的基础上，将实际的引信起爆电路作为闸流管的检测电路，将起爆电路的工作条件施加于检验电路，可以更准确地给出闸流管的导通电压、触发电压，同时测量出闸流管的导通时间以及闸流管在关断状态下的漏电流。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48