What Are The Common Vibration Meters

Piezoelectric Vibration Meter

Piezoelectric vibrometers are characterized by high natural frequency, wide measurement frequency range, small size, light weight, and little impact on the measured object, so they are widely used in measuring vibration acceleration. The internal resistance of the piezoelectric vibration sensor is high, and the cable connected to the amplifier is easy to introduce interference. Therefore, it is hoped that the cable should be as short as possible and shielding should be considered. At the same time, the preamplifier should be placed as close to the sensor as possible. Amplifiers used to amplify the electrical signals generated by piezoelectric sensors are now mostly charge amplifiers.

Mechanical Vibration Meter

It is to insert a spring K (or several springs) in the shell, and install a mass of mass m under the spring. This also constitutes a mechanical resonance system. Usually mechanical resonance systems are damped.

The actual vibration sensor uses the shell as the base and is fixed on the object to be measured, and detects the relative motion between the mass m and the shell by mechanical, optical, or electrical methods.

Bezel Vibration Meter

The dial indicator is fixed on the dial indicator frame, the dial indicator is fixed on the bracket isolated from the fan, and the measuring rod of the dial indicator is in contact with the surface of the bearing box or other measurement parts, and the measurement can be carried out. Measurement. This vibration meter does not need to make any other parts, has a simple structure, and can measure vibration in any direction. The disadvantage of the table stand vibrometer is that the stand is not easily isolated from vibration and the accuracy is poor.

Sponge Vibration Meter

The sponge vibrator uses fixing screws to fix the measuring rod casing of the dial indicator on the weight plate, and then pad the sponge ring. Its characteristic is that the p structure is simple, but the accuracy is poor, and it can only measure the vibration in the vertical direction.

Vibration meter in hand

Hold the vibration meter and fix the weight (about 1.5"--'2 grams) with the handle on the back shell of the dial indicator. Its characteristic is that the structure is simple, and it can measure the vibration in any direction. When the rotation speed is 1000-2000 rpm, the error is not large.

Spring Vibration Meter

Spring vibration meter, the main parts are dial indicator, weight and vibration-absorbing spring.