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Encoder

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Transcript

  • 1.  
  • 2. Presentation: Fundamentals Of Mechatronics
  • 3. Topic: ENCODERs
  • 4. Presented To: Engr. Hafiz Khurrum Ali
  • 5. Presented By: Ahmad Abbas 07-MCT-24 M. Umair Mirza 07-MCT-26 Abdul Rahman 07-MCT-36
  • 6. SENSOR A device that produces a measurable response to a change in a physical condition CHOOSING A SENSOR Accuracy Calibration Cost Environmental Range Repeatbility Resolution
  • 7. TYPES OF SENSORS Acceleration Angular/Linear position Chemical/Gas concentration Humidity Flow rate Force Magnetic field Sound
  • 8. ENCODER A device used to change a signal or data to a code
  • 9. BASIC PRINCIPLE
  • 10. ENCODER TYPES LINEAR ENCODER OPTICAL ENCODER ROTARY ENCODER
  • 11. LINEAR ENCODER Scanning unit and Scale
  • 12. CONSTRUCTION
  • 13. MEASUREMENTS PRINCIPLE OPERATION
  • 14.  
  • 15. TYPES OF LINEAR ENCODER ABSOLUTE LINEAR ENCODER INCREMENTAL LINEAR ENCODER
  • 16. VERSIONS ENCLOSED LINEAR ENCODER EXPOSED LINEAR ENCODER METAL BASE LINEAR ENCODER
  • 17. ENCLOSED LINEAR ENCODER USES
  • 18. EXPOSED LINEAR ENCODER USES
  • 19. METAL BASE LINEAR ENCODER
  • 20. ADVANTAGES OF THESE VERSIONS Reduce breakage and system down time Eliminate costly maintenance Greater productivity Easily itegrated into existing system Good repeatbility
  • 21. APPLICATIONS Machine control Automatic process Pick and place operations
  • 22.  
  • 23. OPTICAL ENCODER
  • 24. Optical Encoder: Optical Encoder is a electro-mechanical device and is a digital position measuring device.
  • 25. Principle: Its work on a principle of looking at pattern of alternating black and white segments.
  • 26. Construction: Light source Light sensor Rotating Disk Shaft
  • 27. Working:
  • 28. Types: Regular Encoder Quadrature Encoder
  • 29. Regular Encoder: It count number of transition but cannot tell the direction.
  • 30. Quadrature Encoder: It uses two staggered pattern and tell which way the thing is turning.
  • 31. Sensors used by Optical Encoder. Reflective Sensor Break Beam Sensor
  • 32. Break Beam Sensor: More accurate but require precise mechanical allignment
  • 33. Reflective Sensor Consist of LED and Photosensor
  • 34. Models:
  • 35.  
  • 36.  
  • 37.  
  • 38. Specification: Temperature 0 to 60 degree Speed 600 RPM Weight 400 gms
  • 39. Applications: N.C Machines Digital liquid level Neutron and X-Ray spectrometer
  • 40. ROTARY ENCODER
  • 41. Rotary Encoder: * Electromechanical Device * Convert position in to digital or analog code.
  • 42. Types of Encoder: Absolute Incremental (relative)
  • 43. Absolute Encoder: To determine angular position Incremental Encoder: To determine change in angular position
  • 44. Incremental Rotary Encoder
  • 45. Consist two pulses Second pulse used to determine the direction of rotation of encoder wheel First pulse gave information of incremental and direction of rotation information
  • 46.  
  • 47.  
  • 48. Segments: 100 to 6000 3.6 degree of resolution for 100 segment 0.06 degree of resolution for 6000 segment Segement: Opaque and Transparent
  • 49.  
  • 50. ABSOLUTE ENCODER
  • 51. * Concentric Circles * Opaque and Transparent segment 512 segments in outermost ring of whose has 10 rings
  • 52. Difference between Incremental and Absolute
  • 53. Models
  • 54.  
  • 55.  
  • 56.  
  • 57. Applications: Robotics Photographic lenses Computer Input device e.g TrackBalls Radar plateform
  • 58. Thanks!!!!!!!!!!

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