Piezo-electricity, can it be applied to large structures

In summary, the conversation discusses the possibility of using piezo-electricity to generate electricity from large structures, such as a bridge, or from people walking on pavements in busy streets. However, it is noted that this would not result in free energy as the energy would ultimately come from other sources, such as extra fuel burned in cars or food consumed by pedestrians.
  • #1
pj83
5
0
I'm new to electrical engineering so this is probably a stupid question. But after reading about piezo-electricity, can it be applied to large structures, like a bridge, to generate electricity when traffic travels over it ?
 
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  • #2


pj83 said:
I'm new to electrical engineering so this is probably a stupid question. But after reading about piezo-electricity, can it be applied to large structures, like a bridge, to generate electricity when traffic travels over it ?

Welcome to the PF. Not a stupid question at all. We had a similar thread someplace here on the PF recently. Bottom line is that you don't get any free energy out of it. The energy that you could harvest from deforming (banging on) a piezo or other roadway would come from extra fuel burned in the cars.
 
  • #3


Yeah I suppose that's true, I've read that piezo inserts in shoes could be used for powering mobiles and the like. Could'nt the same technology collect energy from people walking on pavements in busy streets ?
 
  • #4


Same deal: the energy for that comes, ultimately, from the food the pedestrians eat. Though given the weight problem this country suffers, it might not be a bad idea.
 

1. What is piezo-electricity?

Piezo-electricity is the ability of certain materials, such as crystals and ceramics, to generate an electrical charge when subjected to mechanical stress.

2. How does piezo-electricity work?

Piezo-electricity works through the phenomenon of the piezoelectric effect, where the mechanical stress applied to the material causes a separation of positive and negative charges, creating an electrical potential difference.

3. Can piezo-electricity be applied to large structures?

Yes, piezo-electricity can be applied to large structures by using multiple piezoelectric materials and arranging them in an appropriate pattern to generate a significant amount of electricity.

4. What are some potential applications of piezo-electricity on large structures?

Piezo-electricity can be used to power sensors, actuators, and energy harvesters in large structures, as well as in various industrial and commercial settings such as vibration control, energy harvesting from roads and sidewalks, and even in medical devices.

5. Are there any limitations to using piezo-electricity on large structures?

One of the main limitations of using piezo-electricity on large structures is the cost and complexity of the materials and technology involved. Additionally, the efficiency of energy conversion from mechanical stress to electricity may also be a limiting factor.

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