交通灯外文翻译

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交通信号灯英语作文小学

文章标题：Traffic Lights: The Guardians ofOur StreetsTraffic lights, those bright beacons of safety that dot our streets, play a crucial role in ensuring the smooth flow of traffic and the safety of pedestrians. They are the silent guardians, directing us when to stop, when to go, and when to yield. As children, we learn the basic rules of traffic lights: red means stop, yellow means prepare to stop, and green means go. But there's more to these simple signals than meets the eye.The history of traffic lights dates back to the late19th century, evolving from gas-powered to electric-powered systems. Today, they are a sophisticated combination of electronics and engineering, designed to maximize safety and efficiency. Each color of the traffic light carries a specific meaning and purpose. Red, the universal symbol of danger, alerts us to stop and wait. Yellow, a warning, prepares us to slow down and be ready to stop. And green, the signal of permission, tells us we can proceed, but always with caution.As we grow up, understanding traffic lights becomes more than just a matter of safety; it's a lesson in patience and respect. Waiting at a red light teaches us to be patient, to not rush, and to respect the rules that keep us all safe. Yielding to other vehicles or pedestrians at a yellow or flashing red light teaches us to be considerate and mindful of others.Moreover, traffic lights are not just for cars and pedestrians. They also govern the movement of bicycles, motorcycles, and even emergency vehicles. Each mode of transportation must adhere to the signals, ensuring that everyone shares the road safely.In our daily lives, we encounter traffic lights countless times, often without realizing their full impact. But they are there, silently guiding us, protecting us, and ensuring that our journey is as safe as it can be.So, the next time you approach a traffic light, take a moment to appreciate its significance. Think about the engineering behind it, the safety it provides, and the lessons it teaches. Remember, traffic lights are not just a part of the urban landscape; they are the guardians of ourstreets, keeping us safe and allowing us to move forward, one step at a time.**交通信号灯：街道的守护者**交通信号灯，那些点缀在我们街道上的明亮安全灯塔，在确保交通顺畅和行人安全方面发挥着至关重要的作用。

关于交通灯的英语作文

The Importance of Traffic Lights in RoadSafetyTraffic lights are a crucial component of road safety, governing the flow of traffic and ensuring the smooth movement of vehicles. They play a pivotal role in preventing accidents and ensuring the safety of road users, including pedestrians, cyclists, and motorists. The three basic colors of traffic lights - red, yellow, and green - each have a specific meaning and purpose, which is universally understood and followed.The red light indicates a stop. When the light turns red, it means that vehicles must come to a complete stop and wait for the signal to proceed. This gives other road users, such as pedestrians and cyclists, the opportunity to cross the road safely. Failing to stop at a red light can result in serious accidents and injuries.The yellow light serves as a warning, indicating that the light will soon turn red. Drivers are advised to slow down and prepare to stop when they see the yellow light. This gives them time to safely come to a stop before the red light comes on.The green light means that vehicles can proceed. However, it is important for drivers to exercise caution even when the light is green. They should always check for pedestrians and cyclists before proceeding and ensure that they drive at a safe speed.Traffic lights are not just about controlling the flow of traffic; they are also about promoting road safety and saving lives. By following the rules and regulations set by traffic lights, we can help create a safer and more orderly road environment for everyone.The effectiveness of traffic lights lies in theirability to communicate clearly and concisely with drivers. The simple colors and universal meaning of the lights ensure that there is no confusion or ambiguity. This is crucial in a fast-paced and often chaotic environment like a busy intersection, where split-second decisions can have life-or-death consequences.Moreover, traffic lights are designed to adapt to different traffic patterns and conditions. For example, some intersections may have sensors that detect the flow of traffic and adjust the timing of the lights accordingly.This ensures that the lights are always working efficiently and effectively to maximize traffic flow while minimizing the risk of accidents.In addition to their role in road safety, trafficlights also play a significant role in city planning and infrastructure development. They are often used as a tool to manage and direct the growth of cities, ensuring that new developments and construction projects do not disrupt or impede the flow of traffic.In conclusion, traffic lights are an essential component of road safety and traffic management. They not only regulate the flow of traffic but also promote safety and orderliness on the roads. By following the rules and regulations set by traffic lights, we can all contribute to creating a safer and more enjoyable driving experience for everyone.**交通灯在道路交通安全中的重要性**交通灯是道路安全的重要组成部分，它们管理着交通流量，确保车辆顺畅行驶。

基于PLC的交通灯控制系统设计外文翻译

毕业设计（外文翻译）英文题目 PLC-based design of traffic lights中文题目基于PLC的交通灯设计系（院）自动化系专业电气工程与自动化学生姓名学号 2009022388指导教师职称讲师二〇一三年六月PLC-based design of traffic lights Abstract: One kind of traffic light control system using programmable logic controller (PLC), via software control traffic lights run automatically. In the system, the original line is the program instead of the relay, programmable logic controller (PLC) system hardware and software resources to be fair use. Normal operation and emergency transport for a detailed description and from the East and West emergencies can be mutually linked. Traffic signal systems and two seven-segment digital display in the countdown order; also discussed in detail the wiring of the hardware and PLC ladder. Traffic lights at the crossroads of the remote monitoring system design configuration software MCGS, real-time monitoring of traffic lights, greatly improving the reliability of data transmission. At the same time, we can configure the traffic lights to change the status of photographs.Keywords: switching power,supply protection, circuit system design1. IntroductionWith the social development and progress, traffic flow becomes increasingly important. On the one hand, too many crossroads, more and more vehicles, which are causing serious traffic congestion. On the other hand, in the limited time it is necessary to maintain the vehicle and pedestrian fast and safe. Therefore, one kind of traffic light control system design, can be used to display time countdown, with computer controlled real-time data. In addition, the configuration technology for real-time images that reflect the traffic lights, understand the historical crossroads of work to get traffic lights visualization. The system consists of host computer and a low computer. MCGS configuration is installed in the host computer is lower by the PLC control system.Normal traffic signal timing diagram shown in Figure 1. But there are some urgent matters, for example. There are a number of ambulances to transport patients to the hospital or to deal with a number of fire engines and fire. Fire engines and ambulances rushed to take precedence over other traffic scene. According to urban traffic control system, under normal circumstances, two control methods and urgency traffic control factors into account. This process can show 14 segment encoder. U.S. traffic lights instant record of the monitoring process.Emergency control signals to control traffic emergency switch. If there is no emergency lights all work, but when an emergency open. In this case, the car is urgent priority pass. Once the emergency vehicle passes, emergency switch off immediately. The green light in the same direction of the vehicle quickly flashes three times, followed by the normal operation. If you were from the north-south and east-west two emergency vehicles, traffic control systems can respond quickly came early, and then another.2. Traffic Control System DesignA. Hardware designCP1H series PLC as controller, display the procedure should stop when the time series of abnormal system operation, the time will not be displayed. When the emergency procedures are completed time series, countdown display program should be reset. At 220 V AC system is used to control traffic lights, 24 V DC control segment encoder, Figure 2 shows the scheme Eastern time display. CP1H series programmable logic controller (PLC) is a simple controller, which consists of 24 inputs and sixteen outputs. Because the output to twenty In this system, an I / Omodule must be extended. Circuit is shown in Figure 2.B. Control Program DesignSix timers and two special normal open pulse is used in this system, the green light flashes for all north-south and east-timer and a special pulse; eight kinds ofinterlocking internal relay is used to implement the urgency and transmit pulse two directions to PLC, shown in the figure. Two SDEC instructions are used to display the countdown display the corresponding light. As an important part of the countdown display program, east and west of the green light reflected in the view 4 in these programs downloaded to the programmable logic controller (PLC), all the traffic lights running accuracy, urgency, and things can be interlocked from north to south strictly, all the lights can be set back to the urgency of passing state. Therefore, these control program is correct, simple.C. Monitoring SystemComputer system has two main functions: an output signal acquisition and display real-time status of the programmable logic controller (PLC) to control traffic lights, traffic lights. Another notification robot status and history of the state real-time curve by examining the history and alarm window.This monitoring system design and configuration software MCGS configuration is easy. The serial communication is implemented as follows.Data inspection methods: double endedSerial Communications Number: COM0 endedThe minimum sampling period: 200 msProgrammable Logic Controller (PLC) The parameters are defined as follows: The minimum sampling period of the basic properties: 200 msThree read / write channel: X0, X1, X2Six read-only access (read U.S. traffic lights): Q0-Q5All channels must be connected to a variable defined in a real-time database access visits and other parameters to their default values. After a successful relationship, PLC and computer control system is able to change the color of the analog signal lights in the picture on the PC being collected data through the serial port.. In contrast, by changing the parameters of the host, the corresponding value is written to the PLC internal relay control, intersection traffic lights can be implemented. Experimental results show that the system is usually good enough and animation. Online monitoring system of traffic lights in Figure 5:3. ConclusionExperimental results show that the system is usually configured with enough good photos. This system simplifies the programmable logic controller (PLC) and the communication between the host computer using industrial configuration software development time is greatly reduced. In particular, more suitable for complex controlsystems. We can control the traffic lights by the PLC and MCGS configuration, replace the original relay control, improve the system's lifetime. At the same time, this method can be applied to control the motor and fluid levels. Remote control and configuration combined with the simulation, can be applied to similar control zone. 4. References[1] Whitworth, Duller, Jones D I. Aerial video inspection of overhead power lines [J].PowerEngineering Journal,2001,15:25-32.[2] Jan Axelson, Lakeview Research-Serial port complete [D]. USA:1999:91-135.基于PLC的交通灯控制系统设计摘要一种交通灯控制系统采用可编程序控制器(PLC), 通过软件控制交通灯自动运行。

单片机交通灯中英文对照外文翻译文献

中英文对照外文翻译原文DESIGN OF TRAFFIC LIGHT BASED ON MCUBecause of the rapid development of our economy resulting in the car number of large and medium-sized cities surged and the urban traffic, is facing serious test, leading to the traffic problem increasingly serious, its basically are behaved as follows: traffic accident frequency, to the human life safety enormous threat, Traffic congestion, resulting in serious travel time increases, energy consumption increase; Air pollution and noise pollution degree of deepening, etc. Daily traffic jams become people commonplace and had to endure. In this context, in combination with the actual situation of urban road traffic, develop truly suitable for our own characteristics of intelligent signal control system has become the main task.PrefaceIn practical application at home and abroad, according to the actual traffic signal control application inspection, planar independent intersection signal control basic using set cycle, much time set cycle, half induction, whole sensor etc in several ways. The former two control mode is completely based on planar intersection always traffic flow data of statistical investigation, due to traffic flow the existence of variable sex and randomicity, the two methods have traffic efficiency is low, the scheme, the defects of aging and half inductive and all the inductive the two methods are in the former two ways based on increased vehicle detector and according to the information provided to adjust cycle is long and green letter of vehicle, it than random arrived adaptability bigger, can make vehicles in the parking cord before as few parking, achieve traffic flowing effectIn modern industrial production,current,voltage,temperature, pressure, and flow rate, velocity, and switch quantity are common mainly controlled parameter. For example: in metallurgical industry, chemical production, power engineering, the papermaking industry, machinery and food processing and so on many domains, people need to transport the orderlycontrol. By single chip microcomputer to control of traffic, not only has the convenient control, configuration simple and flexible wait for an advantage, but also can greatly improve the technical index by control quantity, thus greatly improve product quality and quantity. Therefore, the monolithic integrated circuit to the traffic light control problem is an industrial production we often encounter problems.In the course of industrial production, there are many industries have lots of traffic equipment, in the current system, most of the traffic control signal is accomplished by relays, but relays response time is long, sensitivity low, long-term after use, fault opportunity increases greatly, and adopts single-chip microcomputer control, the accuracy of far greater than relays, short response time, software reliability, not because working time reduced its performance sake, compared with, this solution has the high feasibility.About AT89C511.function characteristics description:AT89C51 is a low power consumption, high performance CMOS8 bit micro-controller, has the 8K in system programmable Flash memory. Use high-density Atmel company the beltpassword nonvolatile storage technology and manufacturing, and industrial 80S51 product instructions and pin fully compatible. Chip Flash allow program memory in system programmable, also suitable for conventional programmer. In a single chip, have dexterous 8 bits CPU and in system programmable Flash, make AT89C51 for many embedded control application system provides the high flexible, super efficient solution. AT89C51 has the following standard function: 8k bytes Flash, 256 bytes RAM, 32-bit I/O mouth line, the watchdog timer, two data pointer, three 16 timer/counter, a 6 vector level 2 interrupt structure, full-duplex serial port, piece inside crystals timely clock circuit. In addition, AT89C51 can drop to 0Hz static logic operation, support two software can choose power saving mode. Idle mode, the CPU to stop working, allowing the RAM, timer/counter, serial ports, interruption continue to work. Power lost protection mode, RAM content being saved, has been frozen, microcontroller all work stop, until the next interruption or hardware reset so far. As shown in figure 1 for the AT89C51 pins allotment.Figure 1 the AT89C51 pins allotment2.interrupt introductionAT89C51 has six interrupt sources: two external interruption, (and), three timer interrupt (timer 0, 1, 2) and a serial interrupts. Each interrupt source can be passed buy bits or remove IE the relevant special register interrupt allow control bit respectively make effective or invalid interrupt source. IE also includes an interrupt allow total control bit EA, it can be a ban all interrupts. IE. Six is not available. For AT89C51, IE. 5 bits are also not be used. User software should not give these bits write 1. They AT89 series for new product reserved. Timer 2 can be TF2 and the T2CON registers EXF2 or logical triggered. Program into an interrupt service, the sign bit can be improved by hardware qing 0. In fact, the interrupt service routine must determine whether TF2 or EXF2 activation disruption, the sign bit must also by software qing 0. Timer 0 and 1 mark a timer TF0 and TF1 has been presented in the cycle count overflow S5P2 074 bits. Their value until the next cycle was circuit capture down. However, the timer 2 marks a TF2 in count overflow of the cycle of S2P2 074 bits, in the same cycle was circuit capture down3.external clock driving characteristicsTable 14.leisure and power lost pattern external pins stateTable 2About 8255 chip1.8255 features:(1)A parallel input/output LSI chips, efficacy of I/O devices, but as CPU bus and peripheral interface.(2)It has 24 programmable Settings of I/O mouth, even three groups of 8 bits I/O mouth to mouth, PB mouth and PA PC mouth. They are divided into two groups 12 I/O mouth, A group including port A and C mouth (high four, PC4 ~ PC7), including group B and C port B mouth (low four, PC0 ~ PC3). A group can be set to give basic I/O mouth, flash control (STROBE) I/O flash controlled, two-way I/O3 modes, Group B can only set to basic I/O or flash controlled the I/O, and these two modes of operation mode entirely by controlling registers control word decision.2. 8255 pins efficacy:(1). RESET: RESET input lines, when the input outside at high levels, all internal registers (including control registers) were removed, all I/O ports are denoting input methods.(2). CS: chip choose a standard lamp line 1, when the input pins for low levels, namely/CS = 0, said chip is selected, allow 8255 and CPU for communications, / CS = 1, 8255 cannot with CPU do data transmission.(3). RD: read a standard lamp line 1, when the input pins for low levels, namely/RD = 0 and/CS = 0, allow 8255 through the data bus to the CPU to send data or state information, namely the CPU 8255 read from the information or data.(4). The WR: write a standard lights, when the input pins for low levels, namely/WR = 0 and/CS = 0, allows the CPU will data or control word write 8255.(5). D7: three states D0 ~ two-way data bus, 8255 and CPU data transmission channel, when the CPU execution input/output instruction, through its realization 8 bits of data read/write operation, control characters and status information transmitted through the data bus.(6). PA0 ~ PA7: port A input and output lines, A 8 bits of data output latches/buffers, an 8 bits of data input latches.(7). PB0 ~ PB7: port B input and output lines, a 8 bits of I/O latches, an 8 bits of input and output buffer.(8). PC0 ~ PC7: port C input and output lines, a 8 bits of data output latches/buffers, an 8 bits of data input buffer. Port C can through the way of working setting into two four ports, every 4 digit port contains A 4 digit latches, respectively with the port A and port B cooperate to use, can be used as control standard lights output or state standard lights input ports.(9). A0, A1: address selection line, used to select the PA 8255 mouth, PB mouth, PC mouth and controlling registers.When A0=0, A1= 0, PA mouth be chosen;When A0=0, A1 = 1, PB mouth be chosen;When A0=0, A1 = 1, PC mouth be chosen;When A0=1, A1= 1, control register is selected.Concerning seven section LED display introductionThrough light emitting diode chip appropriate link (including series and parallel) andappropriate optical structure. May constitute a luminous display light-emitting segments or shine points. By these luminous segments or shine point can be composed digital tube, symbols tube, m word pipe, tube, multilevel matrix display tube etc. Usually the digital tube, symbols tube, m word tube were called stroke display, but the stroke displays and matrix tube collectively referred to as character displays.1. The LED display classification(1) by word high marks: stroke monitors word high least 1mm (monolithic integrated type more digital tube word high in commonly 2 ~ 3mm). Other types of stroke display tiptop1.27 mm (0.5 inch) even up to hundreds of mm.(2) color-coded score red, orange, yellow, green and several kinds.(3) according to the structure points, reflecting cover type, a single point-elastic and monolithic integrated type.(4) from the luminous section electrode connection mode of points of anode and cathode two kinds.2. LED display parametersDue to the LED display is LED based, so its light, and the electrical characteristics and ultimate meaning of the parameters with most of the same light emitting diode. But because the LED monitor containing multiple light emitting diode, it must has the following specific parameters:(1) the luminous intensity ratioDue to the digital tube paragraphs in the same driving voltage, each are not identical, so positive current each different. The luminous intensity All segments of the luminous intensity values the ratio of the maximum and minimum values for the luminous intensity ratio. The ratio between 2.3 in 1.5 ~, the maximum cannot exceed 2.5.(2) pulse positive currentIF each segment of typical strokes displays for positive dc working current IF, then the pulse, positive current can be far outweigh.someotherwordpeopledontthinkoffirst. Pulse 390v smaller, pulse positive current can be bigger.Traffic signal control typeThe purpose of the traffic signal control are three: first,in time and space space intersection traffic in different directions,control traffic operation order; Second, make onplanar cross the road network on the people and objects of transport at the highest efficiency, Third, as the road users to provide necessary information, and help them to effectively use the traffic facilities. Road traffic signal control of basic types have many points method.According to the control geometry characteristic is divided into: single intersection control - point control, the traffic trunk lines of coordinated control - wire, traffic network coordination control surface controlling; -- According to the control principle differentiates: timing control, induced control and adaptive control.About watch-dog circuitBy single-chip computers.the micro computer system, because of single chip work often can be affected by external electromagnetic interference, causing program run fly while into dead circulation, the program's normal operation be interrupted by single chip microcomputer control system was unable to work, can cause the whole system of come to a standstill, happen unpredictable consequences, so out of microcontroller running status real-time.according consideration, they generate a specially used for monitoring microcontroller program running state of the chip, commonly known as "watchdog" (watchdog).MAX692 was slightly system monitoring circuit chip, have back-up battery switching, power lost discriminant functions monitoring, the watchdog. The encapsulation and pin instructions as figure2shows.Figure 2 MAX692 encapsulation and pinsWatch-dog circuit application, make SCM can in no condition to achieve continuous work, its working principle is: the watchdog chip and MCU an I/O pins are linked together, the I/O pins through program control it regularly to the watchdog of the pins on into high level (or the low level), this program statement is scattered on SCM other control statements,once among single-chip due to the interference makes application run into a fly after the procedures section into dead circulation state, write the watchdog pins program cannot be executed, this time, the watch-dog circuit will be without microcontroller sent signals, then at it and MCU reset pin connected pin reset signal give out a a, make SCM reposition occurs, namely the program from program memory splittext started, so we realized the MCU automatic reset.Infrared detection circuitThe infrared radiation photon in semiconductor materials stimutes the non-equilibrium carriers (electronic or holes), cause electrical properties change. Because carrier does not escape in vitro, so called within the photoelectric effect. Quantum photoelectric effect high sensitivity, response speed heat detectors much faster, is optional detectors. In order to achieve the best performance, generally need worked in low temperature. Photoelectric detector can be divided into:(1) optical type: also called photoconductive resistance. The incident photon stimulate the valence band uniform semiconductor electronic across forbidden band into the conduction band and left in valence band, cause cavitation increases, for electric conductance eigen light conductivity. From the band gaps of impurity level also can stimulate light into the conduction band or born carriers valence band, and for impurities light conductivity. The cutoff wavelength by impurity ionization energy (ie) decision. Quantum efficiencies below eigen optical and require lower working temperature.(2) photovoltaic type: mainly p - n knot of light born volts effect. Energy more than the width of infrared photonic band gaps in "area and its nearby of electrons cavitation. Existing "electric field make hole into p area, electronic into n area, two parts appear potentials. Deoxidization device have voltage or current signal. Compared with optical detectors, pv detector detect rate more than forty percent of figure limit, Don't require additional bias electric field and load resistance, no power consumption, having a high impedance. These characteristics of preparation and use of the focal plane array bring great benefits.(3) light emitting - Schottky potential barrier detector: metal and semiconductor contact, typically include PtSi/Si structure and form was Schott potential barrier, infrared photon through Si layer for PtSi absorption, electronic Fermi level, obtain energy leap over left cavitation potential barrier into the Si substrate, PtSi layer of electronic was collected,complete infrared detection. Make full use of Si integration technology, facilitate production, with lower cost and good uniformity wait for an advantage, but make it mass (1024 x 1024 even greater) focal plane array to make up for the defect of quantum low efficiency. Have strict low temperature requirements. With this kind of detector, both at home and abroad has already produced as qualitative good thermography. Pt Si/Si structure made of FPA is the earliest IRFPA.Timing counting and traffic calculationUsing MCS - 51 internal timer/counter for timing, cooperate software delay realizes the timer. This method hardware cost saving, cut allows the reader in timer/counter use, disruptions and programming get exercise and improve. Computation formula is as follows: TC = M - CType in, M for counter touch value, the value and the counter working way concerned.For a traffic intersection, it can in the shortest possible time to achieve maximum traffic, even reached the best performance, we call in unit of time to achieve the maximum flow multi-energy for cars.Use the equation: (traffic = traffic/time) to represent.译文:基于单片机的交通灯设计我国经济快速发展，汽车数量猛增，大中型城市的城市交通正面临着严峻的考验，交通问题日益严重，其主要表现如下：交通事故频发，对人类生命安全造成极大威胁；交通拥堵严重，导致出行时间增加，能源消耗加大；空气污染和噪声污染程度日益加深等。

交通灯外文翻译

介绍交通信号灯的作文英文

介绍交通信号灯的作文英文英文：As a traffic signal, I play an important role in ensuring the safety of drivers, pedestrians, and cyclists on the road. I use a combination of colors to communicate different messages to those on the road. For example, when I am red, it means that drivers must stop their vehicles, and pedestrians can cross the road safely. When I am green, it means that drivers can proceed with caution, and pedestrians should wait for the next green light to cross the road. Finally, when I am yellow, it means that thelight is about to change, and drivers and pedestrians should prepare to stop or proceed accordingly.In addition to the colors, I also have different shapes and symbols that convey additional information to those on the road. For example, I may have a left or right arrow to indicate that drivers can turn in that direction, or a pedestrian symbol to indicate that pedestrians have theright of way.Overall, my purpose is to regulate the flow of traffic and ensure the safety of everyone on the road. Without me, chaos could ensue, and accidents could happen. So next time you're on the road, be sure to pay attention to my colors and symbols, and follow my instructions to stay safe.中文：作为交通信号灯，我在确保驾驶员、行人和骑车人在道路上的安全方面扮演着重要角色。

交通信号灯有关英语作文

交通信号灯有关英语作文Title: The Importance of Traffic Signal LightsIn modern cities, traffic signal lights play a crucial role in regulating traffic flow and ensuring road safety. These colorful lights, positioned strategically at intersections and pedestrian crossings, serve as silent guardians of order and efficiency on our roads.Firstly, traffic signal lights provide clear and consistent guidance to motorists, cyclists, and pedestrians. With their distinct colors—red, yellow, and green—they communicate universally understood messages: stop, prepare to stop, and go. This standardized system helps prevent confusion and minimizes the risk of accidents caused by conflicting movements.Moreover, traffic signal lights facilitate the smooth flow of traffic, especially during peak hours. By controlling the timing and sequencing of signal changes, they optimize the movement of vehicles, reducing congestion and delays. This not only saves time for commuters but also reduces fuel consumption and air pollution, contributing to a more sustainable urban environment.Furthermore, traffic signal lights enhance pedestrian safety by providing designated intervals for crossing roads. The inclusion of pedestrian signals, such as the "walk" and "don't walk" symbols, ensures that pedestrians have sufficient time to cross safely and that motorists are aware of their presence. This is particularly important in densely populated areas with high pedestrian traffic.However, the effectiveness of traffic signal lights relies heavily on proper maintenance and synchronization. Malfunctioning lights or poorly coordinated signal timings can lead to confusion and frustration among road users, undermining the system's efficiency and safety benefits.In conclusion, traffic signal lights are indispensable components of modern transportation infrastructure. By regulating traffic flow, enhancing safety, and reducing congestion, they contribute to the smooth functioning of urban mobility systems. As cities continue to grow and evolve, it is essential to prioritize investment in reliable and efficient traffic signal systems to ensure safe and efficient transportation for all.。

小学生英语作文交通信号灯

小学生英语作文交通信号灯When I walk to school every morning, I always pay close attention to the traffic lights. They are an essential part of our daily life, ensuring the safety of pedestrians and vehicles alike.The traffic light system is simple yet effective. It consists of three colors: red, yellow, and green. The red light means "stop," signaling drivers to halt their vehicles and wait for the light to change. It's important for everyone to obey this signal to prevent accidents.The yellow light serves as a warning that the light is about to change to red. It tells drivers to slow down and prepare to stop. It's a brief moment to adjust before the red light comes on.Finally, the green light is the signal for "go." It's a go-ahead for drivers to proceed with caution. However, even when the light is green, it's still important to look out for pedestrians and other vehicles.As a student, I've learned that traffic lights are not just for cars. They also help us cross the street safely. When the pedestrian light turns green, it's our turn to walk across. But we must always look both ways before stepping onto the road.In conclusion, traffic lights are a crucial part of our transportation system. They help maintain order and safety on the roads. By understanding and following the signals, we can all contribute to a safer community.。

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Traffic lights and PLCWith economic development, increased the number of vehicles, road congestion is becoming increasingly serious, intelligent traffic lights on the emerged. At present, the world's Intelligent Transportation System will be: a huge structure, management difficulties, such as the maintenance of large inputs. In order to improve the existing traffic conditions, and to overcome the existing shortcomings of intelligent transportation system I designed analog control traffic lights in urban and rural areas of small-scale smart traffic lights. It has small size, intelligence, maintenance into small, easy to install and so on. And other intelligent transportation system compared to the system to adapt to economic and social development, in line with the current status of scientific and technological development.Intelligent traffic lights are a comprehensive use of computer network communication technology, sensor technology to manage the automatic control system of traffic lights. Urban traffic control system is used for urban traffic data monitoring, traffic signal control and traffic management computer system; it is the modern urban traffic control system command and the most important component. In short, how to use the appropriatecontrol method to maximize the use of costly cities to build high-speed roads, trunk road and the ramp to alleviate urban areas with the neighboring state of traffic congestion has become more and more traffic management and urban planning departments need to address the the main problem. Nowadays,traffic lights installed in each crossing,has becom e the most common and dredge the traffic,the most effective mea ns.The development of the society,people's consumption level unceasing enhancement,private vehicles unceasing increase.An d more cars roads are narrow road traffic is clear.So adopting e ffective method to control the traffic light is imperative.PLC intelligent control principle is the core of the control system ,PLC put the things direction or north-south direction accordi ng to quantity of vehicles,the corresponding scale what divide s class given the green light direction between north and south direction according to certain rules too long.It can realize di vides class according to a given the green cars duration scale o f maximum car release,reduce crossroads vehicles,ease traffic congestion stagnation,realize the optimal control,so as to im prove the efficiency of the traffic control system.The application of PLC is continuously,and drive to the deepeni ng traditional control test new month benefit updates.It is simple in structure,programming and high reliability etc,conveni ent already widely used in industrial processes and position in the automatic control.Due to use of PLC has the characteristics of environmental adaptable,and its internal timer is very rich in resources,but the current widely used"progressive"lights ,especially for precise control more than thecrossway control can be easily realized.So now increasingly ap plying PLC traffic light system.Meanwhile,PLC itself also has communication networking function,will the same path as part of a LAN signal unified disp atching management,can shorten the traffic wait times,realize scientific management.In real-time detection and automatic co ntrol of PLC application system,PLC is often used as a core comp onents.In the21st century,PLC will have greater development.Technic ally,the computer technology can morely new achievements usedinprogrammable controller design and manufacturing,there will b e faster,storage and larger capacity,intelligent stronger var ieties appear;Look from product size,can further to mini and s uper-large direction;Look from product compatibility,the var iety of our products will be more rich,specification more compl ete,perfect man-machine interface and complete communication equipment can better adapt to all kinds of industrial control oc casion demands;Look from the market,all countries to their pro duction of multiple products with international competition in tensifies and break,can appear a few brand monopoly internatio nal market situation,can appear international general program ming languages;Judging from the development of the network,pr ogrammable controller and other industrial control computer networking constitute a large control system is programmable co ntroller technology development direction.The current compute r distributed control system DCS has already a lot of programmab le controller applications.Along with the development of compu ter network,the programmable controller as automation control network andinternational general network will be an important part of the i ndustry and industry,the numerous fields outside play an increasing role.In China the increasing amount of motor vehicles,many big citie s like Beijing,Shanghai,nanjing and other ground appeared tra fficoverload running condition,traffic accidents problem also m ore and more serious.And because the various special vehicles( such as an ambulance,119120car,police and various special ve hicle110in emergency situations,by red under limited to traff ic bring a lot of inconvenience,even cause traffic accident.An d now,most traffic lights at the same moment will appear two or more than two direction at the same time for the green situation ,and increase the incidence of the traffic accident.Therefore ,design a kind of designed for special vehicles through and not cause any traffic accident,normal traffic control any time onl y one direction of modern intelligent traffic light green traff ic control system is urgently needed.交通灯与PLC随着经济的发展，车辆的数目不断增加，道路堵车现象日益严重，智能交通灯就应运而生了。