自动化生产线

无无 锡锡 职职 业业 技技 术术 学学 院院 毕毕 业业 设设 计计 说说 明明 书书 英英 文文 翻翻 译译 2 英文 automatic production lines Modern automatic production equipment automatic production lines is the biggest characteristic of its comprehensive and systematic here mechanical technology microelectronic technology electronic technology sensor technology interface technology information transformation technology network communication technology are organically combined and comprehensive application to production equipment while the system is a production line sensor detection transmission and processing control execution and driving mechanism in micro processing unit under the control of coordinated and orderly work organically fuses in together Economic development gradually globalization foreign enterprises and joint enterprises continue to enter China these enterprises to a high starting point new technology a large number of equipment need to use electrical control automation knowledge at the same time many large and medium sized enterprises in order to improve the quality and quantity of products to increase competitiveness technological transformation but also the introduction of advanced equipment electromechanical integration equipment and more and more the PLC control technology field bus technology frequency conversion technology computer control technology DCS microelectronic technology new knowledge in all walks of life especially in the industrial position are used more and more the staff positions only know the traditional control so in the next five to ten years in urgent need of a large number of high level has a strong practical ability of the skilled talents to fill these positions in order to meet the growing needs of new technology it requires large amounts of electric automation technology professionals in addition to commercial entertainment residential management also needs such advanced technology applied talents 360 毕 业设计网 Programmable controller PLC with its high anti interference ability high reliability high performance price ratio and the programming simple and widely used in modern automatic production equipment loading production line of the brain the role of micro processing unit Therefore the students of mechanical and electrical integration of technology to grasp the technology of PLC and PLC network technology and technical personnel is a pressing matter of the moment Ya alon YL 335A type automatic production line training equipment in the aluminum alloy guide rail type training platform mounted on the feed processing assembly transportation sorting and other work units constitutes a typical automatic production line machinery platform each body system utilizes a pneumatic drive 无无 锡锡 职职 业业 技技 术术 学学 院院 毕毕 业业 设设 计计 说说 明明 书书 英英 文文 翻翻 译译 3 inverter driving of stepper motor position control technology Control system adopts the work of each unit consists of a PLC assumed the control task the PLC through the RS485serial communication to realize interconnection distributed control mode Therefore the application of YL 335A integrated a variety of technical knowledge such as pneumatic control technology mechanical technology mechanical transmission mechanical connections sensor application technology PLC and network control stepping motor position control and inverter technology The use of YL 335A can be simulated with an actual production situation is very close to the control of the process make the learners get a very close to the actual teaching equipment and environment thus shortening the teaching of theory and practical application of the distance between the YL 335A adopts modular structure each unit is relatively independent modules and the use of standard structure and drawer module placing frame has strong interchangeability According to the practical needs of different work tasks or different combinations installation and debugging simulating production function and the integration of the learning features of the target and is very suitable for the teaching training or skills competition needs Each unit of the actuator is basically a pneumatic actuator but conveying unit mechanical hand device adopts the whole movement of stepper motor drive precision positioning control of the position the drive system with long stroke multiple anchor points are characterized by a typical one dimensional position control system The sorting unit conveyor belt driving is adopted for general inverter to drive three phase asynchronous motor AC drive device Position control and inverter technology is the most widely used in modern industrial enterprises in electric control technology In the YL 335A device used various types of sensors were used to determine the movement of objects object position through the state the color of the object and material Sensor technology is the integration of mechanical and electrical technology is one of the key techniques to achieve a high degree of automation is a modern industrial one of premise PLC electric control system design of programmable controller PLC is short mainly by the CPU central processors memory input output module module and power supply of digital electronic control equipment It is mimicked by the original relay control principle of development in the electric control technology and computer technology on the basis of automation and computer communication technology into one of the modern industrial control device The current PLC electric control production system has been widely used 无无 锡锡 职职 业业 技技 术术 学学 院院 毕毕 业业 设设 计计 说说 明明 书书 英英 文文 翻翻 译译 4 in the machine manufacturing petrochemical mining industry and electricity facilities and other industries PLC electrical control production system mainly includes information sampling input selection internal processing output is performed in four stages the process is referred to as scan cycle On PLC electrical control production system design according to the different control structure can be divided into the single control system centralized control system distributed control system remote control system and the control system The single control system is to use a PLC to control the electronic device its input output points and the memory capacity is small it can choose any type of PLC as a small control system centralized control system is to use a PLC control multiple electronic device and the device more concentrated distribution between each other in the action with a sequential relationship for a simple pipeline control distributed control system is the use of multiple PLC control corresponding to the electronic device between each other through signal in response to internal linkage and wherein a PLC electronic device failure other electronic equipment in normal operation is not influenced therefore more suitable for large centralized production in the enterprise application if the control object of dispersive distribution can be used for remote control system namely I O system is put in the control device near I O system and PLC through twisted pair coaxial cable connection or transfer local control system refers to each control object is equipped with a machine with control program of the PLC and then use a PLC via coaxial cable PLCS programmable logic controller is used for various automatic control system and process control network hub They contain a number of input and output input and output are transistors and other circuit analog switch and the relay to control equipment PLCS software interface the standard calculator interface specialized language and network programming Programmable logic controller I O channel includes all input contacts and the output contacts expand capacity and the maximum number of channels Contact number is input and output points PLCS can specify these values for any possible combination Expansion unit can be a stack or connect to each other to increase total capacity control The maximum number of channels is in an extended system input and output pathways of the maximum total amount of The PLC system includes scanning time number of instructions data storage and program storage The scan time is PLC need to detect input and output module of time Command is used to PLC software such as arithmetic standard operating Data storage is capable of storing data Program storage is the ability of control software 无无 锡锡 职职 业业 技技 术术 学学 院院 毕毕 业业 设设 计计 说说 明明 书书 英英 文文 翻翻 译译 5 For a programmable logic controller input device includes DC AC an intermediate relay thermocouple RTD frequency or pulse transistor and the interrupt signal input output devices include DC AC relay an intermediate relay frequency or pulse transistor three triac switch element PLC programming device includes a control panel the handle and the computer Programmable logic controller using a variety of software programming language to control These languages include IEC61131 3 sequential execution table SFC action block diagram FBD ladder diagram LD structure of the text ST IL a sequence of instructions the relay ladder diagram RIL flow chart C language and Basic language IEC61131 3 programming environment to support five languages using international standards to regulate respectively SFC FBD LD ST and IL This allows multiple vendor compatibility and multiple language programming SFC is a chart language it provides programming sequence coordination can support the order of selection and the selection the two select one of them can FBD with a large runtime in chart form established some complex process Standard mathematical and logical operation can communicate with the user interface and operation in combination with LD is applied to the discrete control and interlocking logic diagram language It is in discrete control is fully compatible with FBD ST is a language of the text used for complex mathematical process and calculation less applicable to chart language IL is a combinatorial coding similar low level language It is used in relatively simple logic instructions Relay ladder diagram and ladder diagram of programmable logic controller is applied to the important programming language Ladder diagram programming is designed to relay logic program graph representation Flow chart is a chart language used in a controller or a software application is described in the order of operations it can be used to establish a standard component can be recycled using a runtime C language is a high level programming language applicable to the treatment of the most complex calculation continuous data acquisition task It is typically run on PC machine debugging The BASIC language is used to process the data of continuous digital acquisition and interface running high level language Programmable logic controller can also regulate many computer interface equipment network rules and characteristics PLC energy equipment and operating environment is also very important Programmable logic controller using a variety of software programming language to control These languages include IEC61131 3 sequential execution table SFC action block diagram FBD ladder diagram LD structure of the text ST IL a sequence 无无 锡锡 职职 业业 技技 术术 学学 院院 毕毕 业业 设设 计计 说说 明明 书书 英英 文文 翻翻 译译 6 of instructions the relay ladder diagram RIL flow chart C language and Basic language IEC61131 3 programming environment to support five languages using international standards to regulate respectively SFC FBD LD ST and IL This allows multiple vendor compatibility and multiple language programming SFC is a chart language it provides programming sequence coordination can support the order of selection and the selection the two select one of them can FBD with a large runtime in chart form established some complex process Standard mathematical and logical operation can communicate with the user interface and operation in combination with LD is applied to the discrete control and interlocking logic diagram language It is in discrete control is fully compatible with FBD ST is a language of the text used for complex mathematical process and calculation less applicable to chart language IL is a combinatorial coding similar low level language It is used in relatively simple logic instructions Relay ladder diagram and ladder diagram of programmable logic controller is applied to the important programming language Ladder diagram programming is designed to relay logic program graph representation Flow chart is a chart language used in a controller or a software application is described in the order of operations it can be used to establish a standard component can be recycled using a runtime C language is a high level programming language applicable to the treatment of the most complex calculation continuous data acquisition task It is typically run on PC machine debugging The BASIC language is used to process the data of continuous digital acquisition and interface running high level language Programmable logic controller can also regulate many computer interface equipment network rules and characteristics PLC energy equipment and operating environment is also very important Study on the production of PLC electrical control system development and application need from the PLC electronic device physical structure control function instruction programming memory capacity and response time and so on were considered Based on the PLC electrical control production system knowledge the input module system for field device emits signals are examined and then transformed into PLC internal level signal this signal according to the voltage into DC and AC type according to the circuit formation into the input type and separation type In the industrial production of users to have some technology requirements of production process preparation to control program and then deposited into the PLC electrical control production system the user program memory so do not need to take any special measures will be able to adapt to the production of industrial automation environment The input module 无无 锡锡 职职 业业 技技 术术 学学 院院 毕毕 业业 设设 计计 说说 明明 书书 英英 文文 翻翻 译译 7 configuration need to consider signal voltage transmission distance and power supply mode The output module is the PLC internal signal into the external control signal thereby driving the external load Input output module is PLC and the controlled object of the interface between the Because the programmable controller has strong anti interference ability high reliability easy programming high ratio of performance to price in the field of industrial control has been widely used Industrial time machine as central control unit equipped with configuration software selection of large screen real time supervisory interface realize the control point for the dynamic display modify data fault diagnosis automatic alarm but also show the query history records system main components of total operation time a device process flow chart grid device structure diagram The central control unit machine PLC adopt serial communication for data exchange the next bit machine used PLC control according to the controlled object of the number the control object range can use one or more PLC control PLC data exchange is to use an internal link register realize the data exchange and share PLC real time field monitoring has high reliability and simple programming flexible so people pay more attention to Although the industrial control computer and programmable controller itself has very high reliability but if the input to the PLC switch signal error analog signals appear larger deviation to the PLC output control actuator without the required action which may make the control process error cause the pecuniary loss that cannot redeem Effects of field input to the PLC signal error is the main reason 1 caused by short circuit short circuit transmission signal delivery when the signal transmission line failure the signal is transmitted to the PLC causing the control error 2 mechanical jittering live contact although only closed a PLC felt that closed multiple times although the hardware and software of the filter circuit increase the differential instruction but because the PLC scan cycle is short may still be in the count accumulation translocation and instruction in error error control results 3 the transmitter a mechanical switch itself out of trouble such as bad contact the transmitter site of non electric quantity deviation reflects or is not working properly these faults will also make the control system can not work normally In order to improve the reliability of field input to the PLC signal the first choice of higher reliability of transmitter and a 无无 锡锡 职职 业业 技技 术术 学学 院院 毕毕 业业 设设 计计 说说 明明 书书 英英 文文 翻翻 译译 8 variety of switches caused by various reasons to prevent the signal transmission line short circuit open circuit or bad contact The second in program design to increase digital filter program increasing the input signal credibility Improve reading PLC field signal reliability can also be used to control the system characteristics the relationship between the signal to judge the signal of credible degree As for level control due to storage tank size is known the liquid inlet or outlet valve opening and the pressure is known in a certain time of liquid in tank changes height of approximately in what range is known if the liquid level meter for PLC data and estimate the height of liquid level difference judgment may be level machine fault the fault alarm system informs the operator to check the liquid level meter and as each tank having upper and lower liquid level limit protection when the switch signal to the PLC the signal is reliable when programming we will this signal and the tank level signal contrast if the liquid level meter readings in the limit position the signal is true if the level meter reading to a limit position judgment may be level limit switch fault or transmission line fault through the same alarm system informs the operator of the fault