| Vibration measurement is done to create the data | | | | proportional to the acceleration of the vibrating |
| that's necessary in drawing a meaningful and | | | | mechanism. Accelerometers possess good sensitivity |
| significant conclusion from the system being tested. | | | | qualities and a wide, helpful frequency range. Though |
| The said data can be very helpful in reducing as well | | | | small in size and light in weight, accelerometers are |
| as eliminating the vibration. Among the devices used | | | | capable of calculating the vibration at a certain point |
| in a typical vibration measurement system are | | | | without generally loading the vibrating apparatus. |
| transducers, preamplifiers, and processing and display | | | | Moreover, accelerometers can easily work with |
| apparatus. | | | | electronic integrating networks to achieve a voltage |
| The transducers are generally used in vibration | | | | that's proportional to displacement or velocity. |
| measurement and analyses since they are responsible | | | | The next apparatus that's useful in vibration |
| for converting mechanical energy into electrical | | | | measurement is the preamplifier. Consisting of one or |
| energy. They do this by generating an electrical signal, | | | | more stages, this equipment has two very significant |
| which is a role of mechanical vibration. The velocity | | | | functions. One purpose is to amplify the vibration |
| pickups and accelerometers installed or connected to | | | | pickup signal that's generally weak, and the other is |
| the vibrating structure are considered transducers. | | | | to serve as an isolation tool or impedance |
| Velocity pickups generate an electrical output signal | | | | transformer between the processing and display |
| that is proportional to the velocity of the vibrating | | | | apparatus and vibration pick up tool. |
| device. Since the vibrating mechanism's velocity is | | | | The equipment intended for processing and displaying |
| naturally cyclical, the sensitivity of the velocity pickup | | | | the vibration data is normally some kind of spectrum |
| is expressed in peak milli-volts/cm/s. It is, therefore, a | | | | analyzer. The said analyzer can be a simple device |
| magnitude of the voltage created at the stage of | | | | that provides the rms equivalent of the vibration |
| optimum velocity. The natural frequencies of the | | | | displacement, or it can be the one that essentially |
| equipment are very low, and they are tuned to | | | | gives an instant analysis of the whole vibration |
| calculate the vibration frequencies that are more than | | | | frequency range. These analyzers are perhaps the |
| the pickup?s natural frequency. These velocity pick | | | | most important device in vibration measurement. |
| ups are considered helpful transducers since they are | | | | Usually, they are either a |
| sensitive but strong enough to resist intense industrial | | | | constant-percentage-bandwidth or |
| atmosphere. | | | | constant-bandwidth kind of tool. They typically |
| The accelerometer is a device that produces an | | | | feature some kind of graphical display to give |
| output signal. The size of this electrical signal is | | | | comprehensive frequency information. |