OVERVIEW OF THE PRODUCT CLASSIFICATION SYSTEM
Overview of the product classification system
In production practice, it is easy to come across output lines of different sizes specifically here is height In order to minimize labor costs and avoid boring jobs for workers, reduce the rate of errors in the line, the automatic product classification system by height was born.
Depending on the complexity and requirements of each level of classification, we have many different forms of classification such as:
One of them is the classification system by height which is being widely adopted The system operates on the principle of using sensors to determine the height of the product Then use the actuator mechanism to classify products of different heights The actuator can be a propulsion cylinder, a lever driven from the engine
In the product classification system, there will be 3 main components:
- Will give feedback signals to help the system process signals thanks to the transition from physical signals to electrical signals In this height classification system, we use sensors to detect objects at a certain height to be able to detect objects to be classified.
- The execution mechanism will receive orders to perform the tasks offered by the control system Here are the cylinder pistons, conveyors,
- It is a device that generates a control signal, in order to influence the actuator to achieve the desired change.
Analog control device: ON/OFF, P, PI, PD, PID
Digital control equipment: Microcontroller, Computer, PLC.Logic control devices: Microcontrollers, Computers, PLCs.
Control principle of the system
The control system works according to the principle that after the conveyor motor is turned on, the workpiece feeding system will proceed to insert the workpiece into the conveyor, then the sensors will proceed to determine the properties of the workpiece and depending on each sensor will send a signal to control the corresponding cylinders to push the workpiece into the sorting tray.
Design requirements of the system:
- The basic model must conform to the taxonomic principle in practice.
- Easy assembly, connector and control operation.
- Use common materials, equipment and components, easy to replace and repair
1.2.2 Block diagram of the system
In the content of Design Project II (ME3036) the calculation of the design of the control system for the product classification system by height with the calculation of the mechanical system design for the system has been made in Design Project I
(ME4186) the calculation of the mechanical system design for the product classification system by height.
SYSTEM DESIGN CALCULATIONS
Basic parameters of the system
Cylindrical : h1 = 15cm, h2 = 10 cm, h3 = 4 cm d1= 5 cm, d2 = 5 cm, d3 = 5 cm
- Embryo weight: Qmin = 0.4 kg; Qmax = 5.5 kg
Mechanical components were selected in project 1:
- Conveyor: Length L = 1000mm, width W = 150mm, thickness H 3mm
Chain disc mounting diameter 15 mm
- Motor : 68KTYZ deceleration motor with: o Operating voltage: 220 V. o Power: 28 W. o Rotating speed: 40 rpm.
- External transmission: Chain transmitter with parameters:
Chain type Roller Tube Chain
Small number of chain disc teeth of1 23
Large number of chain disc teeth of2 71
Chain disc material Gray cast iron
Small chain disc split ring 93,27 (mm)
Large chain disc split ring diameter
Small chain plate top ring diameter
Large chain plate top ring diameter
Small chain disc root diameter 85,39 (mm)
Diameter of large chain disc root 279,23 (mm) Force exerted on the shaft Fr 284.2 (N)
- This control system design project I will proceed to design the control system for the system with the technical requirements of the system and the mechanical system calculated in project 1 as mentioned above.
Analysis and selection of basic components of the control system
Proceed to select the control option:
- Option 1: Using closed-off relay devices to set up a logical circuit to control the sequential operating system, combined with an inverter to control the motor
- Option 2: Use siemens PLC programmable logic control equipment to control the whole system, control the motor through integrated signals from the output of the PLC
- Option 3: Use microcontrollers such as Arduino sets to control the entire system
Analysis of advantages and disadvantages of options
-Easy to replace broken relays
-Low control customization -Built-in development capabilities are almost nonexistent
Option 2 -Modern technology, capable of developing good integration
- Can be easily designed with a monitoring system
Option 3 -Modern technology, capable of developing good integration -Easy to own due to low cost
-Not suitable for flexible production systems in industry
Based on the working conditions and stability of the working system in the factories, I will choose option 2 to have the most convenience in the working process.
Student: Nguyen Viet Hung 10 ID:
PLC controllers offer the flexibility and power to control a wide variety of devices that support automatic control requirements The combination of compact design, flexible configuration and powerful instruction set makes PLC a perfect solution for controlling a wide variety of applications.
Combines a microprocessor, integrated power supply, input and output circuits in a collapsible structure After the user loads the program, the CPU will contain the logical circuit that is required to monitor and control the devices The PLC's CPU monitors the input and alters the output signal according to the program's logic including boolean logic operations, counting, complex operations, and the communication of other smart devices.
Product line CPU 1214C DC/DC/DC.
The upper limit allows 28.8 VDC.
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Consumption currents 500 mA for single CPU.
Maximum consumption current 1500 mA for CPU and expansion mudule.
Number of extended modules 3 communication modules, 1 singal board, 8 signal modules.
Number of digital inputs 14, Integrated.
With load of resistance, maximum 0.5A.
With load of lights, maximum 5W.
The number of analog input 2.
Input resistance (0 to 10VDC) ≥100 KOhms.
Table 1 PLC S7-1200 (CPU 1214C DC/DC/DC)
Because the S7-1200 has outstanding features:
- The S7-1200 is a line of programmable logic controllers (PLCs) that can control many automation applications Student: Nguyen Viet Hung 12 ID:
Product code 6AV2124-0MC01-0AX0
Screen parameters 12-inch, 16 million color wide
6 Functions in the system Classification of embryos by height.
Operating principle When the sensor encounters a magnetic field, it closes the circuit.
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Ultrasonic Distance Sensor code CDD-40N 30CM NPN
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1 Input voltage AC 220V (L and N Pins)
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Code sp: YW1B-M1E01R -Size: 22mm.
SP Code: YW1LA2E11Q4G -Size: 22mm.
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The TL3000 pneumatic oil supply unit has the function of supplying lubricating oil to the compressed air system, helping to lubricate pneumatic valves and pneumatic cylinders.
•Maximum working pressure: 10 kg/cm2 (1 Mpa)
•Pressure adjustment: 0.5 – 8.5 kg/cm2 (0.05 – 0.85 Mpa)
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Design electrical drawing
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CONTROL PROGRAMING AND INTERFACING DESIGN
PLC Programing
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Simulation
3.3.1 Driver configuration in Factory IO
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Control monitor screen HMI
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CONCLUSION
Through the process of implementing the topic "Designing a control system for product classification", I have helped me understand more about the product classification system by height as follows:
Chapter 1: Help me know an overview of the control system of the system, know how to do the working principle, analyze the specifications of the system from which to choose the basic components of a control system.
Chapter 2: Know how to choose devices with the right specifications for the system as well as how to connect the control elements together to form 1 complete connection diagram.
Chapter 3: Know how to build control algorithms, how to set up and statistics the input and output signals of the system Write a control program for the system as well as an activity monitoring system for the product classification system.
Know how to learn and simulate the operation of the system through Factory IO software.
The development of science and technology entails the technological development of the product classification system by height Classification systems are increasingly optimized and integrated with advanced technologies to keep up with the needs Student: Nguyen Viet Hung 30 ID: