Methods of vibration monitoring, vibration meters, methods of measurement of vibration - Baltech

Key features vibration (displacement, velocity, acceleration) mechanical systems in a wide the frequency band can be accurately quantified according to the results of the impact vibration on the parameters of the electromagnetic field of the vibrator or source electromagnetic (microwave, ultrasound, light, etc.) Radiation. On the determination of the changes in these physical parameters and all methods of control and measurement of vibration. By far the best vibrometer are the instrument series "VibroPoint BALTECH VP-3410, BALTECH VP-3405, BALTECH VP-3470.

First, all measurement methods vibrations are divided into contact - that mean the installation webredactie directly on the object under study, and non-contact (remote) - without mechanical connection with the object. To contact method of vibration control is the method with the use of piezoelectric sensors when the vproperties fixed one way or another (glue, magnet, using a screw connection, just a clamp) to the sample surface. This method has high accuracy in low frequencies with relatively large amplitudes of vibration parameters, but are unsuitable for high vibration frequencies with small amplitudes. This limitation in the field of high frequencies due to the distortion of the waveform due to the high inertia a piezo pickup. Also the use of this method impossible in case of comparable mass of the investigated object with the mass of the piezoelectric transducer. To obtain a satisfactory the accuracy of the results it is necessary that the mass of the piezoelectric transducer was not more than 10% from the mass of the object.

To contact method of vibration control also true method of an open microwave resonator, in which one of the mirrors fixed on the object, and the second still. This method provides very high accuracy measurements of large amplitudes and already allows you to register signals of small amplitude at high frequencies.

As you can see, the contact control methods vibration is not applicable in cases when you cannot make a mechanical connection with the object, moreover, their application is limited by inertia and, let small, but the influence on the object. These deficiencies are deprived of contactless methods of vibration measurement based on the sensing of the object sound or electromagnetic field. Among become traditional you can call methods of vibration control using vigorously, capacitive and inductive vibration sensors. Of the latest developments follows to note method for ultrasonic fotometrii based on the measurement of the difference the phases of the reference and the reflected ultrasonic signal. This method provides high the accuracy of low-frequency vibrations, however, severely limited a fast decay ultrasound in the air, dependence on atmospheric conditions and reduce the accuracy measurements with increasing vibration frequency.

Widespread today received optical method of vibration control based on the Doppler effect. Providing acceptable measurement accuracy, this method depends significantly on the quality the reflecting surface and significantly restricted by the difficulty and expense of measuring equipment.

All of the above control methods the vibrations have their "pros" and "cons", but for measuring absolute values parameters vibration on non-rotating parts of machines and mechanisms most acceptable is a method using a piezoelectric vibrometer, which has high metrological qualities, a wide amplitude and frequency range, high reliability of operation and comparative affordability.

If you want to buy vibration meter for the piezoelectric vibration control of its rotary equipment, we suggest that you can opt for the vibration meter-balancer "PROTON-Balance-II", you will not only provide control of the current technical condition Park your equipment, but also be able to carry out balancing of rotors in their own supports in one or several planes.

You can also entrust vibration control and vibration diagnostics of your equipment the specialists of the Department of Technical Service (OTS) by "Baltech"company.