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

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Presentation transcript:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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