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Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær The Measurement Chain.

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Presentation on theme: "Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær The Measurement Chain."— Presentation transcript:

1 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær The Measurement Chain

2 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Early Methods of Vibration “Measurements”

3 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Classification of Motion Transducers Absolute or relative transducers Active (self-generating) or passive transducers

4 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Mechanical Lever

5 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Piezo-electric Accelerometer

6 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Types of Accelerometers

7 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Mass-Spring Transducers (Seismic)

8 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Mass-Spring Transducers (Seismic)

9 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Mass-Spring Transducers (Seismic)

10 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Mass-Spring Transducers (Seismic)

11 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Useful Frequency Range

12 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Sensitivity and Frequency Range

13 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Special Accelerometers

14 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Choosing an Accelerometer

15 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Transverse Sensitivity

16 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær The “Mass Loading” Effect

17 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Properties Linearity Phase distortion Effect of temperature

18 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Environmental Effects

19 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Handle the Accelerometer Carefully

20 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær The Calibration Chart

21 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Calibration

22 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Calibration using “Back-to-Back” method

23 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Preamplifier

24 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Choice of Preamplifier

25 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Single-ended or Floating Input

26 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Ground Loop Problem and Solution

27 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Preamplifiers On and Inside Accelerometers

28 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Charge Amplifier

29 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Typical ICP Sensing System

30 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær ICP / Charge Mode

31 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Piezoresistieve accelerometer Brug van Wheatstone

32 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Capacitieve accelerometer

33 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Velocity Pickup

34 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Eddy Current Proximity Probes

35 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Eddy Current

36 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Calibration Curve Mechanical run-out Electrical run-out Cross-coupling

37 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Operational Range of Vibration Transducers

38 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Absolute verplaatsingsopnemers (assen) Contactsonde Gecombineerde sonde

39 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Acceleration Mounting - Fixed

40 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Acceleration Mounting - Handheld

41 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Choosing the Mounting Position

42 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Choosing the Transducer

43 Vrije Universiteit Brussel - Mechanical Engineering - Acoustics & Vibration Research Group © Brüel&Kjær Scanning Laser Vibrometer

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