Vibration Measurement

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Presentation transcript:

Vibration Measurement 南臺科技大學 STUST Vibration Measurement Dept. of Mechanical Engineering Yungpeng Wang

Vibration Measurement System Pre-Amplifier Memory1 Dynamic Frequency Analyzer A/D Weighting Display Transducer Memory2 南臺科技大學 STUST

Transducer Accelerometer: acceleration Piezoelectric Accelerometer Charge type ICP type (Integrated Circuit -Piezoelectric) Vibration Pickup: velocity Proximeter: displacement 南臺科技大學 STUST

PZT Accelerometer

Velocity Pickup

Proximeter

Pre-Amplifier Charge Type Piezoelectric Accelerometer Pre-amplifier: Charge to voltage conversion Amplification Filter ICP Type Piezoelectric Accelerometer Power supplies Amplication 南臺科技大學 STUST

Dynamic Frequency Analyzer Overall Analysis Vibration Meter Narrow Band Constant Band Analysis (FFT Analysis) High Resolution Diagnose for Vibration Source, System Analysis 南臺科技大學 STUST

Dynamic Frequency Analyzer Octave Band Constant Percentage Band Analysis (CPB Analysis) Vibration Energy Distribution Monitoring, Human Factor Analysis Overall Analysis Vibration Meter 南臺科技大學 STUST

Dynamic Frequency Analyzer Octave Band Constant Percentage Band Analysis (CPB Analysis) Vibration Energy Distribution Monitoring, Human Factor Analysis 南臺科技大學 STUST

Dynamic Frequency Analyzer 南臺科技大學 STUST

Two Problems Aliasing Solution: Anti-aliasing filter (Low-pass filter) 南臺科技大學 STUST

Two Problems Leakage Solution: Time Weighting 南臺科技大學 STUST