Basic driving principles of a piezoelectric actuator/transducer
ฝัง
- เผยแพร่เมื่อ 7 ก.ย. 2020
- Piezoelectric actuators/transducers have certain operation principles that help us understand how they should be driven. In this video, we mainly focus on using the capacitor model of a piezoelectric device to determine how it will react to different electronic loading scenarios.
**To sign up for my ultrasonic transducer webinars, follow the link: www.ultrasonicadvisors.com/mo...
Schedule a 30 min Q&A or a free consulting call:
calendly.com/ultrasonicadviso...
My piezoelectric/ultrasonic transducer consulting website:
www.ultrasonicadvisors.com/
Excellent. The fundamentals. Now I can (start to) make sense of the circuits I have been looking at.
Nice video. Thanks for sharing your knowledge.
Great explanation! I was searching for a simpler explanation but after a few minutes I was hooked into learning more than planned
Glad to hear that! I'll get straight to the chase next time though in my explanation :)
@@ultrasonicadvisors no I didn't mean it was too long! I just meant it was more detailed than I was looking for. But I enjoyed the deep dive
@@ultrasonicadvisors i agree with rosh but do not shorten this its great
@@searchiemusic Thanks!
@@ultrasonicadvisors its like getting a guitar lesson from jimmi hendrix, you clearly know a lot about these cute little guys, again its real great to not only hear like a "it does this because of this, but that's complicated so i won't get into it" but hear you give a bit of detail as well, like your parents telling you not to do something but not why making you want to do that even more its always bothered me so again its pretty great to see you flesh what you know about out
***To sign up for my ultrasonic transducer webinars, follow the link: **www.ultrasonicadvisors.com/monthly-ultrasonic-webinar** ***
What controls the ultrasonic sound level in db from the piezo. Is it the level of voltage you put across the piezo ?? Does the frequency affect the sound level ?
Voltage and proximity to the resonance frequency.
Hi Husain, I think I with regard to your topics here I got a trival problem:
I play the electronic drums. And I found out that some companies use resistors in their drum pads. 33k ohms in series with the head piezo and 150k parallel to it, and 150k parallel to the rim piezo. For the head piezo it's a voltage divider to cool down the signal I guess. But what it resistor parallel to the rim piezo for.
I am asking how large is the damping of the signal on the time scale, and will that have any noticable effects on the trigger results.
When using a resistor in series will lead to a faster decay of the signal, won't it?
Do you have a guess how to simulate that configuration. These two piezos are connected to tip and ring and sleeve to an TRS plug going to the drum modul.
I know it would be great to know what comes "behind" the drum modules TRS jack ... but I dont know it for that certain modul. Mostly I saw the people using a MOhm in parallel to the piezo together with a Zener diode to protect the further electronics.
Thanks for a short comment.
Greetings from Germany
Manuel
The resistor damps out high frequency vibration via simple RC filter. The piezo is a capacitor.
What is best to generate high frequency noise 20KHz to 25 Khz. Is it a piezo or ultrasound tranducer ? are they the same thing. What will give off a high sound 100 ++ db Have you a part number ?
Yes, look for piezo speaker on amazon. Piezo tweeter also has good frequency response in that range/.
Isnt it because of the duty cycle of 50% the time it reaches the upper level of charge will doubled?
I mean the timeconstant tells you something about risetime, but you mentioned that after 5 cycles it reaches saturation of capacity, but I think it takes twice the time because of duty cycle of 50%.
I have a driver circuit of 1mhz piezo disc working fine a day before, but when I replace the disc(1 MHz) of different brands in the same circuit the NPN transistor gets heat up a lot and the wave are also not impressive any possible solution ?????
@@ultrasonicadvisors so soft materials disc responsible for heating up the transistor????? then i have to use hard materials right????
Ooh yes, it was a bit confusing what u said at 12:50, but think its clear now thanks. I though u said now its saturated at the time constant.