MAE535 Piezoelectric Demo

[offrdchic73]

Nice job and its was good to watch. I am a MET student at UMass. Thanks

[chicagocumpa]

He says piezo fine at 5:27 ...nit-picking pronunciation doesn't produce intelligence. If you understand what he means, the only one holding back a real discussion is yourself.

[Megyoxxx]

i watched this just to listen to peezo

[sheepking410]

if you pressed the piezoelectric 'disc' of the buzzer by NOT moving your finger away, will it generates voltage continuously?

[kikumaru12903]

may I know whether piezoelectricity supply a DC or an AC?

[arashtoudeshki]

To measure the generated voltage you can use a simple resistive voltage divider and digital oscilloscope. The multimeter is not a good measurement device to measure the voltage of short time impulse's voltage. The digital multimeter is showing the RMS value of the voltage in long period of time. That is why it is showing a very small value. The true value of voltage is higher than 5kV, depends to the air gap condition such as distance, humidity and air pollution, as I measured in my lab.

[torquor]

if mounted correctly could these piezoelectric cells be used to measure vibration on say a motor? I know the crystal types are already used for this application but im thinking of doing a project based upon this theory.

[TheBetterPeter]

can the piezo work as a button somehow?

[youtuuba]

@fronkenpoop, here is more, as promised, for your edification. The original Greek word from which comes PIEZO is 'piezein' or 'piesis', meaning "pressure". Not that it helps much, but classical Erasmian Greek would divide it up like this: (Pi-iota) // (accented epsilon-zeta) // ([epsilon-iota dipthong]-nu), where // divides syllables. So they would have said 'pih-ehz-ayn'. In modern pronunciation, the suffix is dropped and vowel pronuncation morphs to pih or pee-aye-zoh. Professionals agree....

[youtuuba]

@fronkenpoop, my oh my, what an expert you are! FYI, I am a retired physics and electronics professor who has looked this up MANY times and consulted with experts on Greek (since 'Piezo' is from that language, not from Italian or from English, as you seem to think). You cite one dictionary, and when I look that up in Oxford, my edition says 'pie-ee-zoh', three syllables, not two. Webster's (three editions I checked) all say 'pee-ay-zoh', still three syllables. More on this to follow.....

[youtuuba]

@fronkenpoop

This is supposed to be a science/physics demo, and it is referenced to a course number MAE535. This means it is not intended to be a casual demo just for the YouTube crowd. As such, the presenter should get the basics right, and this includes how to pronounce the main subject's name. And if you don't even understand enough of what you are measuring to realize that the demonstration is flawed, then it begs comments. No good teacher would let these errors go unchallenged.

[140tyson]

thank you for that demonstration it really helped me get a much more understanding on just what piezoelectric buzzer is. i had a car alarm once with a piezo buzzer that was audible for the duration my car was armed that alerted everyone this car is armed with a soft but clear beep every 4-5 sec. Sound like the that beep you hear on a E K G machine, heart monitor. II been looking for one ever since to add to my 3 vehicles.

[aerotown42]

thanks much so.....I learned lots from this vid. Iv all-ways wanted to know how the things worked.

[ICUC007]

I took apart a window alarm sensor. I saw the piezo element and so many other things. I wanted it to operate hardwired instead of by battery. Worked for a minute then died. I figured I fried something, resistor or capacitor or whatever. I had connected it to an adapter with adjustable DC output, set to 4.5v. Now seeing your video, it looks like I don't even need all those other little parts and components, only the piezo element. Is that right? Would I still need an adapter, how many v output?

[rayroy3]

i think Ford's use of piezoelectric effect has more to do with cymatics in the liquid fuel than it does with any valve opening or closing. its the same way piezoelectric inkjet printheads work.

[laviiiify]

I thought this was something to do with gems ( Air Gear)

[youtuuba]

A couple of comments:

-You say Pee-zee-oh and Pee-zo. The word is actually Pee-ay-zo. You are not alone, as many engineers also have never bothered to learn the correct pronunciation either.

-When you use the piezo transducer to generate a voltage, keep in mind that voltage depends on force applied. A piezo igniter uses a spring trigger to apply lots of force suddenly. Your multimeter cannot respond fast enough, so it shows a low voltage. It is actually more like 2000V briefly. Ask your teacher!

[bravestarr99]

i agree.

he should use a multimeter with average value shown. Pee-ay-zo is totally correct. it's from the greek word piezein which means "to press/push".

[rawnnie]

Thanks a lot for this video BigKell007, it was very informational and helpful in understanding whats going on behind the much hyped about BlackBerry Storm 2 (which apparently contains a piezoelectric touchscreen). Thanks! :)

[phomey]

I would like to talk to you about the piezo electric and cubic class 432 type quartz.