accelerometer

Accelerometer

Accelerometer

An accelerometer is a device that measures the vibration, or acceleration of motion of a structure. They measure in meters per second squared (m/s2) or in G-forces (g). The force caused by vibration or an acceleration (change in motion) causes the mass to "squeeze" the piezoelectric material which produces an electrical charge that is proportional to the force exerted upon it. Since the charge is proportional to the force, and the mass is a constant, then the charge is also proportional to the acceleration. Accelerometers are useful for sensing vibrations in systems or for orientation applications.

Engine Sound Evaluation by Audio Replay and Filtering

Engine Sound Evaluation by Audio Replay and Filtering

When we move to engine sound and vibration evaluation, we will have more methods and approaches that can be used to troubleshoot or improve the sound characteristics. In many cases, engine is considered as source of the vibration and sound. The fact that sound can be transferred through structure borne, air borne, or liquid borne makes acoustic/sound analysis becomes more challenging.

Vibration Controller, The Brain of Vibration Testing System

Vibration Controller, The Brain of Vibration Testing System

While accelerometer is playing the role of feedback sensor at vibration testing system, then vibration controller can be considered as the "brain" of it. Vibration controller is the device that sending the "instruction" in the form of drive voltage during vibration testing, and also interpreting the feedback signal coming from the accelerometer.

Accelerometer Calibration, Ensuring Accuracy of Vibration Testing and Measurement

Accelerometer Calibration, Ensuring Accuracy of Vibration Testing and Measurement

These are most common questions raised by test engineer during training session after the installation of new vibration testing systems. But before going to more details regarding accelerometer calibration, it is better to understand what role is played by accelerometer during vibration testing.