How much power can we generate from piezoelectric crystals?

Question

Lets say we could attach one end of a piezoelectric substance to a musical tuning fork and the other to a fixed point, then we made the fork vibrate, it would make a voltage come out the piezo substance as a force is being applied.
How much energy could be harvested from this (in Watts)? Lets all assume that the fork is vibrating at 440Hz (the first A above middle C in the musical scale).

Answer 1

very little, because the current from pizo is very small,
ie: in nano Amps, and since W= I * V
for example: 0.0000001 * 1000 = 0.0001 watts which is very little .
so power input is more than power out put,
unless u have lots of free vibration and lots of cheap pizo to make it viable

Answer 2

The piezoelectric arises from compression or stretching of the crystal structure. It would be tricky to capture the fork vibration as compression of a crystal. It would obviously damp the vibration. What would be the energy source for the fork vibration?

A better scenario is to capture energy from an existing source of
vibration where the energy is currently wasted. A highway would be a good example. The engineering challenge is to design such a system to (1) survive, and (2) produce an economic benefit greater than its cost. We're nowhere near meeting those challenges. Photovoltaics, however, have become reliable and cost-effective, and the technology is still improving.

Answer 3

A lot.

My brother used to work in a ceramics factory where they made piezos, he was in the lab. They shelves used to give them an emormous shock when a lorry went past on the road - the vibration caused it.

but i don't know the specific answer.

Answer 4

Not sure but an application of it could be generators under roads or in the sea. The do generate a high voltage, I think it is higher than speakers.

Answer 5

From wikipedia on piezoelectricity, it looks such as you will purely get a pair of million to 2 watts, collectively as a pc calls for 50 to a hundred watt. See under. The regulation of conservation of ability would not enable you generate extra ability that what you put in. the conventional human physique is burning approximately a hundred Watts. throughout the time of heavy excercise it is going to be plenty larger. The ability conversion of this way of equipment ought to be very low, for this reason in case you get something working in any respect, assuming a 10% performance of the piezo electric powered equipment, then you will want the human to be burning one thousand Watt to permit you to ability the laptop. maybe Michael Phelps who calls for 12,000 energy an afternoon can try this. "a similar thought is being researched via DARPA contained in united statesa. in a challenge referred to as ability Harvesting, which consists of an attempt to ability battlefield kit via piezoelectric turbines embedded in infantrymen' boots. notwithstanding, those ability harvesting assets via affiliation have an effect on the physique. DARPA's attempt to harness one million-2 watts from non-give up shoe effect collectively as strolling have been abandoned because of the impracticality and the soreness from the extra ability expended via a individual donning the shoes. different ability harvesting techniques comprise harvesting the ability from human strikes in practice stations or different public places[8][9]."

Answer 6

Well it's obviously not very much, otherwise we'd have Piezoelectric Submarines instead of Nuclear ones.