industrial instrumentation basics

  Vibration measurement Definition:  Vibration is defined as a periodic motion of the particles of an elastic body in alternatively opposite direction from the position of equilibrium. Acceleration, velocity, and displacement are the main parameters in vibration measurement. Unit of vibration   unit of vibration is mm/ sec. Types of vibration There are two main types of vibration measurement performed in the industry .   Axial Vibration This is a longitudinal vibration, it is measured in parallel to the shaft of a motor. This type of measurement is done to detect a shaft misalignment. Radial Vibration   This vibration occurs as a force applied outward from the shaft. Radial vibration would occur if there is a heavy spot in the motor as it rotates. If there is a deformed fan blade, as the fan spins, the deformed fan blade would pull outwardly on the shaft of the motor causing radial vibration. Types of vibration sensor Following are types of vibration meas...