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Acquiring vibration data is only part of the challenge of vibration measurement; the other part is the analysis of the data acquired. It’s important to understand the types of waveforms associated with vibration analysis, the important differences between them and when it is appropriate to use each type of vibration analysis tool. Here’s a quick overview of some of the basics. Time Domain Vibration Analysis Vibration analysis starts with a time-varying, real-world signal from a transducer or sensor. Analyzing vibration data in the time domain (amplitude plotted against time) is limited to a few parameters in quantifying the strength of a vibration profile: amplitude, peak-to-peak value, and RMS, which are identified in this simple sine wave. The peak or amplitude is valuable for shock events, but it doesn’t take into account the time duration and thus the energy in the event. The same is true for peak-to-peak value with the added benefit of providing the maximum e

his post is the second in a monthly series of “How It Works” articles that detail the inner workings of motor maintenance services and processes. Large motors are sophisticated machines, and their failure can be deeply disruptive to the rest of a facility’s operations. Understanding how your motor works — and the preventative and predictive maintenance that can make it work better — can both enhance the life of a motor and decrease its energy consumption. Rotating Machines and Vibration Anyone who works with rotating equipment knows that proper alignment and balance are key to its function. Improper dynamic balance — the most frequent type of balance problem — can cause excessive vibration, which in turn can damage the machine. Balance problems can produce: Unwanted noise Unnecessary vibration Early bearing wear Structural damage Inefficient operations Equipment failure Unnecessary downtime High repair expenses

Sonic is the sound we can hear. Ultrasonic is the sound above the human hearing range. A human can hear a maximum up to a frequency of 20 KHz. Ultrasonic frequencies are above 20 KHz. Ultrasonic waves are used to measure the level of liquids and solid objects in industries. Ultrasonic level measurement is the contactless principle and most suitable for level measurements of hot, corrosive and boiling liquids. The normal frequency range used for ultrasonic level measurements is within a range of 40 ­ 200 KHz. 1. What is the principle of ultrasonic level measurement? Ultrasonic waves detect an object in the same way as Radar does it. Ultrasonic uses sound waves, and Radar uses radio waves. When the ultrasonic pulse signal is targeted towards an object, it is reflected by the object and echo returns to the sender. The time traveled by the ultrasonic pulse is calculated, and the distance of the object is found. Bats use a well-known method to measure the distance w