控制信号

Especially, the technology of Automatic Gain Control and signal processing are studied which are key factors working on the performance of the receiver. Based on analyzing the theory of automatic Gain Control, operational amplifiers 0P37 and logarithmic D/Aconverter AD7111A are used to design variable gain amplifiers which can be controlled numerally, A/D convector LTC1405 is Used to test the echo, Complex Programmable Logic device is used for controller, and an arithmetic is designed for automatic Gain Control which is simulated and analyzed in order to test its feasibility.

本文在分析自动增益控制AGC原理的基础上，采用集成运放OP37和数控增益衰减器AD7111A设计可数字控制的可变增益运放模块；采用高速A／D转换器LTC1405作为回波信号检测模块；采用复杂可编程逻辑器件CPLD作为核心控制模块，构成数字自动增益控制电路，并设计粗调和细调步进控制相结合的算法，对回波信号的增益进行精确而快速的调节控制，使回波信号振幅快速稳定在设计指标范围内，利于接收机后续信号处理电路对回波信号作进一步的处理。

Traffic signal control system Settings in each intersection signal lights color control parameters, to signal under the control of the intersection in all directions of traffic flow in the intersection of the stalled minimum delay time, and in a number of intersection signal chain control , To seek optimal within the region, to further improve vehicle operating conditions, making pollutant emissions reduced.

交通信号控制系统通过在每个交叉口设置色灯信号控制参数，使其信号控制下的本交叉口所有方向的交通流在交叉口的停顿延误时间最小，以及在多个交叉口信号联锁控制时，寻求区域内最优，进而达到改善机动车运行工况，使得污染物排放量降低。

The controller receives, analyzes and processes the command input by operator via the man-machine interface, to adjust and control the controllable light signal generator according to the analysis processing result and the spectrum result checked by the light checker, the controller outputs the adjustment and result via the man-machine interface to the operator, to output light signal for the result of adjustment and control on the controllable light signal generator, via the light coupler to be coupled partly and feedback to the light checker to be checked, thereby forming a closed-circuit, while the light signal coupled to the light output via the light coupler reaches user target spectrum demand.

本发明公开了一种实现光信噪比可调节的光信号源装置及控制方法，所述装置包括：控制器、人机接口、可控光信号发生器、光耦合器、光信号检测器、光信号输出口；控制器接收操作者输入给人机接口的指令并分析和处理，运用分析处理结果、并结合光检测器检测的光谱结果数据来调节和控制可控光信号发生器，控制器将调节过程和调节结果通过人机接口输出给操作者，对可控光信号发生器调节和控制的结果输出光信号通过光耦合器耦合一部分又反馈给光检测器检测，这样形成一个闭环控制，使得通过光耦合器耦合到光输出口的光信号达到用户目标光谱要求。

So we designed a adaptive synchronizing controller based on hereinbefore hardware environment: first a small magnitude reference signal r is outputted to system through the signal card (to ensure that the vibrating system works in a linear state), and this signal is sent to the moving coil of vibrator through the power amplifier, so vibration is produced through electromagnetic induction. Secondly the vibration signal can feedback to the data acquiring card in the servo system through the acceleration sensor on the Vibroseis reactor M〓 and the base-plate M〓, then the computer can get the current vibrating state y〓 of the coil of vibrator according to the feedback information from the data acquiring card, and give a real time comparing between the current state y〓 and the reference output y〓 of the set-in reference model with current reference input being r , then regulates the correlative controlling parameters according to the error e〓=y〓-y〓 till y〓→y〓, finally normal signal sweeping begins with a certain phase fixed. Meanwhile a synchronization signal for seismic signal record is sent to seismograph from synchronization signal outputting component in the Vibroseis system to perform the controlling process of synchronization of sweeping phases.

为此，我们基于以上的硬件环境设计了一个自适应同步控制器：首先通过信号发生卡对系统输出小幅度的参考信号r(从而保证振动系统工作处于线性状态)，信号通过前置放大器、功率放大器等送到激震器动圈，并通过电磁感应产生振动，振动信号通过可控震源激震器反应块M〓和基板M〓上的加速度传感器反馈给伺服系统中的数据采集卡，工控计算机根据采集卡的反馈信息，获取当前激震器动圈的振动状态y〓，并实时地将该状态与内置的参考模型在当前参考输入r下的参考输出y〓进行辨识，再将两者输出误差e〓＝y〓-y〓对系统的有关控制参数进行调整，直至y〓→y〓，最后在经过某一固定的相位后，开始信号的正常扫描过程，与此同时，由可控震源系统的同步信号输出部件向地震仪送出一地震信号记录同步信号，进而完成扫描相位同步控制过程。

Because elevator's movement is according to the floor and the sedan theater box calling signal, the traveling schedule signal carries on the control, but the floor and the sedan theater box's call is stochastic, therefore, the systems control uses the random logic control, namely, in realizes in elevator's basic control request foundation by the order logical control, According to the stochastic input signal, as well as elevator's corresponding condition, at the right moment controls elevator's movement.

由于电梯的运行是根据楼层和轿厢的呼叫信号、行程信号进行控制，而楼层和轿厢的呼叫是随机的，因此，系统控制采用随机逻辑控制，即在以顺序逻辑控制实现电梯的基本控制要求的基础上，根据随机的输入信号，以及电梯的相应状态，适时地控制电梯的运行。

At present, our country majority cities have already established the many kinds of traffic signal control system, at the same time, the road intersection simple point signal control was still the main signal control way, timed control occupies proportion bigger, undulates a bigger road intersection in some traffic flows, to realize the signal fuzzy control to be imminent.

目前，就我国大多数城市而言，已经建立了多种交通信号控制系统，与此同时，交叉口单点信号控制仍是主要的信号控制方式，其中定时控制所占的比例较大，在一些交通流量波动较大的交叉口，实现信号模糊控制已迫在眉睫。

The sketch and specific design approaches of mid-block street crossing are generalized and three management and control modes are discussed. Based on extensive investigation and survey, the paper analysis the arriving laws in different land-use condition and the traffic characteristics of different crossing entities under different control modes. The initial characteristic, the speed and dispersion of the mobile flow are also intensive studied, as well as the effect of mid-block street crossing. Establish the linear planning models on the coordination between the signals of mid-block crossing and intersection. Finally the evaluation of the model output is carried out from time saving results, safety, economic results and social results. Set the example of Taiping north road in Nanjing, surveying the traffic situation, applying the method of signal coordination between the mid-block crossings and intersection to realize the south-to-north signal coordination design. The evaluation results show the coordination plan are more superior to the current signal plan.

本文首先阐述了行人过街物理设施的概略设计和详细设计方法，讨论了路段人行横道的三种交通管制方式的设计方法和实用条件；其次，在充分的实际调查基础上，详细分析了不同用地性质条件下的过街需求的到达特性和不同交通管制下不同过街实体的交通特性，分析了进入路段的机动车初始流特性，并对机动车在路段中的车速特征、离散性以及路段信号控制人行横道对机动车流的影响进行了研究；然后，根据以上分析的过街交通和机动车交通的交通特性，建立了路段行人过街信号与交叉口信号协调控制的线性规划模型；最后，对模型输出的协调控制方案进行了效益评价分析，从时间效益、安全性、经济效益和社会效益四个方面，定量和定性相结合地对其实施效果予以评价；以南京市太平北路路段为例，根据现状交通状况，应用行人过街信号与交叉口信号协调控制的方法，对该路段由南向北方向进行单向协调控制设计，并进行方案效益分析评价，提出了优于现状控制方案的人行过街信号与交叉口信号协调控制方案。

The treating plant mainly has the following input signal in this set of control system: Che Neinei was mad that outside the temperature signal, the vehicle the external Qi temperature signal, the water temperature temperature signal, the air blower feedback signal, the mix air throttle feedback signal, the back light lamp signal and so on, the output device is the VFD fluorescence vacuum display monitor, the control device is mainly on control panel''s pressed key, realizes the plan acts according to the vehicle speed, Each temperature value''s situation comes the intelligent control air-conditioning system various air throttles electrical machinery and compressor''s work, causes in compartment''s temperature basis hypothesis temperature in the physical sensation comfortable scope, simultaneously controls the blowing through the air throttle electrical machinery''s movement the direction, the cold hot blast proportion, the automatic control, forces to defrost, the inside and outside circulates the wind transformation and the breakdown situation demonstration is the concrete function which this set of control system can realize.

在这套控制系统中处理装置主要有以下输入信号：车内内气温度信号、车外外气温度信号、水温温度信号、风机反馈信号、混合风门反馈信号、背光灯信号等，输出装置为VFD荧光真空显示屏，控制装置主要是控制面板上的按键，实现的方案是根据车速，各个温度值的情况来智能控制空调系统各风门电机和压缩机的工作，使得车厢内的温度根据设定温度在人体感觉舒适的范围之内，同时通过风门电机的动作来控制吹风的方向、冷热风的比例，自动控制，强制除霜，内外循环风的转换和故障情况的显示都是这套控制系统所能够实现的具体功能。

You want to connect your company's head office with a branch office in Detroit. To do this, you want to use two data link layer encapsulations: one exclusively for data and the other exclusively for signaling.

你作为 Dallas 市区 HR 公司的系统管理员，你想将总公司和 Detroi 的分部连接起来，你想使用两种数据链路层的封装技术：封装数据和封装控制信号，请选择最合适的 WAN 技术？

The analogue control signals and parameter retransmissions are applied to the driver board user terminal blocks.

模拟控制信号的转发是通过用户接线端块实现的。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。