The current of piezoelectric ceramic and the other parameters

1. Piezoelectric ceramics, is the current generated by it being DC or AC? And, can it illuminate the LED?

Piezoelectric ceramics, which generate the current, however, producing direct current, not alternating current. As for question two, the answer is no. Because the voltage and current generated by pzt material piezoelectric rod are very small, the voltage is microampere level, so it is not up to the level of lighting LEDs.

2. What is the equivalent of the electrical model of piezoelectric ceramics?

The electrical model of piezoelectric ceramics is equivalent to the capacitance model. Moreover, in this case, the frequency response and the current value are nonlinear, but in the middle of the curve, it can be approximated as a linear relationship. Its reference quantity is four of current, capacitance, voltage and frequency response.

3. Is the parameter of the piezoelectric ceramic material variable?

On piezoelectric ceramics, the materials used are immutable in terms of parameters, the parameters are fixed. However, it should be noted that the two parameters, diameter and thickness,which have certain effects on the elastic stiffness of the piezoelectric ceramic and the dielectric constant.

4. Is the electromechanical coupling coefficient of piezoelectric ceramics and the mechanical quality factor of same concept?

The electromechanical coupling coefficient and mechanical quality factor in piezo ceramic disc piezoelectric ceramics are two different concepts, and they are impossible to be equal. Moreover, it is to be understood that the electromechanical coupling coefficient is the energy efficiency ratio of the piezoelectric ceramic electrical energy converted into mechanical energy, they are generally the higher and the better.

5. Can I use a single-chip microcomputer to drive piezoelectric ceramics?

In this case, it can be said that this cannot be done because it is not allowed. Generally, a non-gate buffer is added and the circuit is configured as a bipolar AC drive. Unipolar DC cannot be used. otherwise, there will be problems.

6. When is placing piezoelectric ceramics, should you pay attention to the electrodes?

About piezoelectric ceramic sensor, when it is superimposed, please pay attention to the electrodes, so the answer to this question is yes, that is, it is affirmative. And when superposing, it should be noted that the polarization direction of the piezoelectric ceramics must be consistent, so that If the manufacturer does not indicate the direction of polarization, then the manufacturer should be asked to avoid misjudgment.

7.What is the effect of piezoelectric ceramic transducers ?

Piezoelectric ceramic transducers use the inverse piezoelectric effect of piezoelectric ceramics when is transmitting signals; and when it is receiving signals, they utilize the positive piezoelectric effect of piezoelectric ceramics, thereby performing transduction The device works fine and gets the desired effect.