【正文】 speed of the motor, it have to eliminate the speed deviation with the actual data.By modifying the deviation caused by the mechanical disturbance, production line of the motor speed constant, at the same time to ensure the production line efficiency. This system is a closedloop control system based on motor speed.This system uses the Proportional, Integration and Derivative (PID) control algorithm in the Programmable Logic Controller (PLC).In the Programmable Logic Controller (PLC), the estimated value sampling in accordance with the set period of time. Assumption the time period is T. The initial value is zero. Using the rectangular Integration instead of precision continuous Integration. Using the difference instead of continuous differential PID algorithm can be reduced to (1).C. The Mechanical StructureThe filling machine adopts Hollysys LM series Programmable Logic Controller (PLC) for control to realize automatic operation, and the whole production line of automatic control. The principle of the section is the bottle out of the bottle washing machine and then into the bottle feeding screw filling machine, by dividing chart thumbwheel to flat on the cylinder of the rotary table, such as , rise the bottleneck, under the guidance of positioning device press feed opening form filling valve sealing [5].After the bottle again pumping air into vacuum state, the back pressure in cylinder liquid carbon dioxide gas into the bottle, when the gas pressure in the bottle is equal to cylinder pressure, under the action of the spring, the valve is opened. At this time, under the guiding role, the liquid automatic into the bottle through the shape of the umbrella reflection ring on the muffler, carbon dioxide in the bottle recycle into liquid cylinder.When the bottle reaching a certain height and it will back to the trachea closed, at this time, it will be automatic stop under liquid. Then put the liquid valve and valve closed, when the bottle is falling, drainage the pressure gas of bottleneck in order to prevent the liquid with gas spewing overflow. The filling is plete the whole part.1 Star dial wheel 2Dial disc 3Shaft The mechanical structure of transport bottleⅢ. RESULTSThis design mainly is to use the Programmable Logic Controller (PLC) and frequency inverter to control motor rotation drive belt drive, and then transfer the bottle to the filling machine, achieve coordination of bottles flow speed and filling speed, improve the production efficiency. The basic idea of this design is as follows: After system start, pressing the motor start switch, if the motor is abnormal, the thermal current relay immediately cut off and to protect the machine, if the motor is normal, then electric start the next step of work.Motor start turning, drive belt drive, bottles waiting for filling under the effect of belt transmission through photoelectric sensor, sensor to count the bottle and sent the numbers to Programmable Logic Controller (PLC) to data processing, after processing, the bottles of flow velocity pared with the value set of the Programmable Logic Controller (PLC) memory inside and determined whether the need for speed regulation, if you don39。t need to control motor operating in accordance with the original speed, if there need to speed regulation, the Programmable Logic Controller (PLC) output control signal to the frequency converter multistep speed regulating control side, after converter receives control signals which Programmable Logic Controller (PLC) sent, the control signals are dealt internal processing.The output of a specific frequency voltage achieves frequency control of the motor. The frequency converter abnormal output feedback signal to the Programmable Logic Controller (PLC) input, realize the protection of the inverter. This design basic meet the design requirements.The system has simple operation, reliable work, friendly interface, high energy saving, prehensive protection functions, and has the characteristics of the automaticmonitoring degree and high production efficiency。 show a good prospect of application and popularization.液體灌裝機(jī)的設(shè)計(jì)與實(shí)現(xiàn)智能控制系統(tǒng)張德民，李世博天津市控制理論與應(yīng)用研究重點(diǎn)實(shí)驗(yàn)室天津工業(yè)大學(xué)391，濱水西道，西青區(qū)，天津，300384，中國(guó)一、引言The filling machine from belong to the category of packaging machinery, Is the material for filling machinery. Is one of the most important aspects of the filling production line. China39。s packaging machinery having developed into the liquid food industry has a significant impact on the world and great market share in the industry.灌裝機(jī)屬于包裝機(jī)械的范疇，是灌裝機(jī)械的材料。是灌裝生產(chǎn)線最重要的方面之一。我國(guó)的包裝機(jī)械已經(jīng)發(fā)展成了液體食品產(chǎn)業(yè)，對(duì)世界和大市場(chǎng)占有率有著重要的影響。It has developed into the liquid food industry and has a significant impact on the world and great market share in the industry [1]. So the liquid filling machine market is development potential. At present, various filling machine production factory production of filler in bottle type filling capacity, efficiency, suitable scope and degree of automation, etc, each have advantages and disadvantages. To a great extent它已經(jīng)發(fā)展成液體食品行業(yè)，并對(duì)世界和大市場(chǎng)占有率有很大的影響[ 1 ]。因此，液體灌裝機(jī)市場(chǎng)的發(fā)展?jié)摿?。目前，各種灌裝機(jī)生產(chǎn)廠生產(chǎn)的灌裝機(jī)在灌裝能力、效率、適用范圍和自動(dòng)化程度等方面，各有優(yōu)缺點(diǎn)。在很大程度上restricts the production quality and production 。Using filling machine can not only improve the labour productivity, reduce product loss, ensure the quality of packaging, but also can reduce the pollution of production environment and packed material of each other.使用灌裝機(jī)不僅可以提高勞動(dòng)生產(chǎn)率，減少產(chǎn)品損失，保證包裝質(zhì)量，而且可以減少生產(chǎn)環(huán)境和包裝材料的污染。Therefore, modern packaging industry generally adopts the mechanized filling machine. This filling machine is used for gas drinks (beer, soda, sparkling beer, coke) filling. Adopt HOLLYSYS LM PLC controls the filling machine. CPU module is responsible for the switch quantity control of filling machine system, Including the movement of filling head solenoid valve, cylinder control of electromagnetic valve, start or stop. And have to all kinds of photoelectric switches, liquid level sensor detection