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Unit V

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Measurement of Power, Flow and Temperature

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Unit V

  1. 1. UNIT V MEASUREMENT OF POWER, FLOW, AND TEMPERATURE
  2. 2. FORCE MEASUREMENT 1.Direct methods  Equal arm balance  Unequal arm balance  Multiple lever system  Pendulum scale 2.Indirect methods  Accelerometers  Electromagnetic balance  Load cell  Hydraulic load cell  Pneumatic load cell  Strain gauge load cell
  3. 3. Strain gauge load cell  Coil spring  Proving ring  Load cells  Bourdon tube  Bellows  Pressductor  Electronic weighing system
  4. 4. EQUALARM BALANCE
  5. 5. UNEQUALARM BALANCE
  6. 6. MULTIPLE LEVER SYSTEM
  7. 7. PENDULUM SCALE
  8. 8. ACCELEROMETERS
  9. 9. LOAD CELL
  10. 10. HYDRAULIC LOAD CELL
  11. 11. PNEUMATIC LOAD CELL
  12. 12. STRAIN GAUGE LOAD CELL
  13. 13. COIL SPRING
  14. 14. PROVING RING
  15. 15. BOURDON TUBE
  16. 16. BELLOWS
  17. 17. PRESSDUCTOR
  18. 18. ELECTRONIC WEIGHING SYSTEM
  19. 19. TORQUE MEASUREMENT  Torque reaction methods  Prony brake  Torque measurement using strain gauge  Torque measurement using torsion bar  Optical method  Capacitive method  Laser optic method  Proximity sensor method  Stroboscope method  Magnetostrictive method  Surface acoustic wave method
  20. 20. TORQUE REACTION METHODS
  21. 21. PRONY BRAKE
  22. 22. MEASUREMENT OF POWER Mechanical dynamometer DC dynamometer Eddy current or inductor dynamometer Hydraulic dynamometer
  23. 23. DC DYNAMOMETER
  24. 24. MEASUREMENT OF FLOW Orifice meter Venturimeter Flow nozzle Rotameter Pitot tube Ultrosonic flow meter
  25. 25. ORIFICE METER
  26. 26. VENTURIMETER
  27. 27. FLOW NOZZLE
  28. 28. ROTAMETER
  29. 29. PITOT TUBE
  30. 30. TEMPERATURE MEASUREMENT  Bimetallic strip  Pressure thermometer  Thermocouples  Thermopile  Resistance temperature detector  Thermister  Pyrometers  Radiation pyrometers  Infrared pyrometers  Optical pyrometers
  31. 31. BIMETALLIC STRIP
  32. 32. PRESSURE THERMOMETER
  33. 33. THERMOCOUPLES
  34. 34. THERMOPILE
  35. 35. RESISTANCE TEMPERATURE DETECTOR
  36. 36. THERMISTER
  37. 37. PYROMETERS
  38. 38. RELIABILITY AND CALIBRATION RELIABILITY: Reliability may be explicitly defined as the probability that a system will perform satisfactory for at least a given period of time when used under stated conditions. The reliability function is thus same probability expressed as a function of the time period. CALIBRATION: Calibration is the process of determining and adjusting an instruments accuracy to make sure its accuracy is within the manufacturers specifications.
  39. 39. READABILITY AND RELIABILITY READABILITY: It is a term frequently used for analog type instruments. It is obvious that this characteristics depends on both the instrument and observer. RELIABILITY: Reliability is a degree to which an assessment tool produces stable and consistent result.
  40. 40. THANK YOU

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