Unit 1.ppt
- 2. UNIT I INTRODUCTION Introduction to Mechatronics – Systems – Concepts of Mechatronics approach – Need for Mechatronics – Emerging areas of Mechatronics – Classification of Mechatronics. Sensors and Transducers: Static and dynamic Characteristics of Sensor, Potentiometers – LVDT – Capacitance sensors – Strain gauges – Eddy current sensor – Hall effect sensor – Temperature sensors – Light sensors UNIT II 8085 MICROPROCESSOR AND 8051 MICROCONTROLLER Introduction – Architecture of 8085 – Pin Configuration – Addressing Modes –Instruction set, Timing diagram of 8085 – Concepts of 8051 microcontroller – Block diagram UNIT III PROGRAMMABLE PERIPHERAL INTERFACE Introduction – Architecture of 8255, Keyboard interfacing, LED display –interfacing, ADC and DAC interface– Traffic Control interface. UNIT IV PROGRAMMABLE LOGIC CONTROLLER Introduction – Basic structure – Input and output processing – Programming – Mnemonics – Timers, counters and internal relays – Data handling – Selection of PLC. UNIT V ACTUATORS AND MECHATRONIC SYSTEM DESIGN Types of Stepper and Servo motors – Construction – Working Principle – Advantages and Disadvantages. Design process-stages of design process – Traditional and Mechatronics design concepts – Case studies of Mechatronics systems – Pick and place Robot – Engine Management system – Automatic car park barrier.
- 3. INTRODUCTION
- 4. INTRODUCTION 1969 -The ‘mechatronics’ word introduced by Tessturo Mori. He was a senior engineer of Japanese company Yaskawa Electric Corporation. 1971 – the company was granted the trademark rights on the word. 1971- 80- mostly the servo technology is used in mechatronics 1981-90-IT introduced. Microprocessors were embedded in Mechanical system.
- 5. 1991 -2000 – Communication technology was added. Remote operation and robotics were developed . 1996 – 1st journal IEEE on mechatronics was released. After 2000, finds application in aerospace, defence, bio-mechanics, automotive electronics, banking(ATM) etc.,
- 6. DEFINITION Mechatronics is “ the synergistic integration of mechanics and mechanical engineering, Electronics, computer technology, and IT to produce or enhance products and system”
- 8. Elements of mechatronics system Actuators and sensors Signals and conditioning Digital logic systems Software and data acquisition systems Computers and display devices
- 9. Elements of mechatronics system Actuators and sensors Actuators – pneumatic & Hydraulic actuator, electromechanical actuators, electrical motor such as DC motor, AC motor, stepper motor, servo motor & piezo electric actuators Sensors – linear and rotational sensor, acceleration sensor, force, torque and pressure sensor, temperature sensor, proximity sensors, light sensors Signals and conditioning Two types: input and output Input signal conditioning devices: discrete circuits, amplifiers, analog to digital(A/D) convertors, Digital to Analog (D/A) convertors. Output signal conditioning devices: amplifiers, Digital to Analog (D/A) convertors, display decoders (DD) convertors, power transistors.
- 10. Elements of mechatronics system Digital logic systems Logic circuits, micro controllers, programmable logic controllers(PLC), sequencing and timing controls, control algorithm. Software and data acquisition systems Data logger, computer with plug in boards Computers and display devices LED, CRT, LCD, digital displays etc.,
- 11. Examples of mechatronics systems NC and CNC machine tools, flexible manufacturing system, Prototyping & robots Photo copiers, laser printers & fax machines Automatic washing machines automatic ovens Automatic teller machine (ATM) Coin counter Automatic/digital camera, digital watch CT scan system, automatic blood testing equipment Automatic sliding door
- 12. Advantages of Mechatronics systems Cost effective and good quality products High degree of flexibility to modify or redesign Very good performance characteristics Wide area of applications Greater productivity in case of manufacturing organization Posibility or remote controlling as well as centralized monitoring and control Greater extend of machine utilization
- 13. Disadvantages of Mechatronics systems High initial cost Multi-disciplinary engineering background required to design and implementation Need of highly trained workers Complexity in identification and correction of problem in the system
- 14. System
- 15. Measurement system Liquid level measurement system
- 16. Control systems A control system refers to a group of physical component connected or related in such a manner as to command direct or regulate itself or another system.
- 17. Cooling level control system Steering control system of an automobile
- 18. Temperature and blood pressure control system of human body
- 19. TYPES OF CONTROL SYSTEM Open loop control system Closed loop or feedback control system
- 20. Open loop control system Open loop system are systems in which the output of a system is not used as a variable to control the system.
- 21. Element of open loop control systems Bread toaster (open loop ) control system
- 22. Closed loop control system Closed loop system uses on a feed back loop to control the operation of the system.
- 23. Room heating (Closed loop) control system
- 24. Open loop system It does not uses feedback It is less accurate It is simple in construction Presence of non-linearity causes malfunctioning The response is slow because manual control Easy maintenance because of no complex electronic circuit Cost is less Closed loop system It uses feedback system It is more accurate It is complicated in construction It perform accurately even in presence of non- linearity It perform task faster than open loop It is difficult to maintain and repair Cost is more
- 25. Automatic tank level control system
- 26. Sequential controllers A sequential control involve sequential execution of well defined operations.
- 27. The working of modern automatic washing machine is Step 1 : pre-wash cycle- (Cold water wash) Step 2: main wash cycle- (Hot water wash) Step 3: rinse cycle- (Number of preset time) Step 4: spin cycle- (Drain the water from clothes)
- 28. Block diagram of automatic washing machine system
- 29. Elements of control system for an automatic camera
- 30. Concept of mechatronic approach
- 31. Emerging area of mechatronics Machine vision Automation and robotics Development of unmanned vehicles Design of subsystem for automotive engineering Sensing and control system Operation and maintenance of CNC machine Expert system and artificial intelligence Industrial electronics and consumer products Medical mechatronics and medical imaging systems Micro/nano mechatronics Computer integrated manufacturing (CIM) system
- 32. Need for mechatronics Dynamic market conditions Producing next generation products Integration of modern technologies in products Variety in product ranges Batch production runs Change in design perspective Product quality and consistency Ease of reconfiguration of the process Demand for increased flexibility
- 34. Working of a four stroke SI engine
- 35. Elements of control system for an electronic engine management system