In terms of mechanical receiving principle, the vibration sensor has only two kinds of relative and inertial types. However, in terms of electromechanical transformation, due to different transformation methods and properties, there are many kinds of applications, and the application range is extremely wide. The sensors used in modern vibration measurements are not traditionally independent mechanical measuring devices. They are only one part of the entire measurement system and are closely related to subsequent electronic circuits.
Due to the different internal electromechanical conversion principle of the sensor, the output power is also different. Some convert the change in the mechanical quantity into the electromotive force and the change in the electric charge, and some convert the change in the mechanical vibration amount into a change in electrical parameters such as resistance and inductance. In general, these amounts of electricity are not directly accepted by subsequent display, recording, and analytical instruments. Therefore, sensors for different electromechanical conversion principles must be accompanied by a dedicated measuring circuit. The function of the measuring circuit is to finally change the output power of the sensor into a general voltage signal that can be accepted by the analysis instrument and analyzed by the instrument.
