There are many types of sensors, and there are many classifications of vibration sensors


Published:

Dec 12,2022

There are many applications of sensors now, and there are many classifications of sensors themselves. Let's take a look at some classifications of vibration tactile sensors.

There are many applications of sensors now, and there are many classifications of sensors themselves. Let's take a look at some classifications of vibration tactile sensors.


1. Piezoelectric force sensor


In the vibration test, in addition to measuring the vibration, it is often necessary to measure the dynamic excitation force applied to the specimen. Piezoelectric force sensors have the advantages of wide frequency range, large dynamic range, small size and light weight, so they are widely used.

The working principle of the piezoelectric force sensor is to use the piezoelectric effect of the piezoelectric crystal, that is, the output charge signal of the piezoelectric force sensor is proportional to the external force.


2. Eddy current sensor


The eddy current sensor is a relative non-contact sensor, which measures the vibration displacement or amplitude of the object through the change of the distance between the sensor end and the measured object.


The eddy current sensor has the advantages of wide frequency range (0~10 kHz), large linear working range, high sensitivity and non-contact measurement.


3. Impedance head

The impedance head is a comprehensive sensor. It integrates a piezoelectric force sensor and a piezoelectric acceleration sensor, and its function is to measure the motion response of the point while measuring the exciting force at the force transfer point. Therefore, the impedance head is composed of two parts, one part is a force sensor, and the other part is an acceleration sensor. Its advantage is that the response of the measurement point is guaranteed to be the response of the excitation point.
 

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