vibration measurerThe comprehensive calibration of performance is only carried out by manufacturing units or research departments. In general usage units and occasions, the main focus is on calibrating its sensitivity, frequency characteristics, and dynamic linear range.

There are many methods for calibrating and calibrating vibration meters, but from the perspective of calculation standards and transmission, they can be divided into two categories: one is the absolute method for reproducing the highest reference value of vibration; Another type is to use a standard vibrometer calibrated by absolute method as a second-class standard to calibrate the working vibrometer by comparative method. According to the different input quantities used during calibration, it can be divided into sine vibration method, gravity acceleration method, impact method, and random vibration method.

Absolute calibration method:

The current vibration measurement standard in our country adopts the laser wavelength as the absolute benchmark for amplitude measurement. Due to the complexity and high cost of the laser interference reference system, and the fact that it cannot be moved once installed and debugged, a second-class standard vibrometer is required as a transmission reference.

Comparative calibration method:

This is the most commonly used method, which is about to be targetedvibration sensor Compared to standard vibration sensors. When calibrating, the calibrated vibration sensor will be connected toStandard sensorsInstall together on a standard vibration table. In order to install them as close as possible, standard vibration sensors often have screw holes on the end face for direct installation on the rigid bracket of the target sensor.