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How can i make a voltage or charge amplifier for a piezoelectric sensor ? what do i need to know ? Answered

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user
iceng (author)2013-05-21

You need to understand a piezo has more output range then any op-amp.

To use a piezo always add a peak limit and the natural negative protection.

If you can not determine your high piezo output before-hand there
is the technical gain amplifier selection on the fly with its attendant
resolution losses.

A charge coulomb integrating amplifier collector can be useful.

Strain gauges are proper more reliable approach to instrumentation.

A

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user
steveastrouk (author)2013-05-21

To work out the performance, you need to specify the load you are going to apply, in terms of microstrain.

It could be 200V.

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user
steveastrouk (author)2013-05-21

Take a look for "charge amplifier circuits"

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user
nobykobe (author)steveastrouk2013-05-21

thanks for the fast response

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user
mpilchfamily (author)2013-05-21

The data sheet you posted has a block diagram of the signal amp. All you need is an Op-amp, resistor and capacitor and your all set. According to the diagram in the data sheet anyway.

Here is some great information on Op-amps that should help you figure out what you need. 
http://www.talkingelectronics.com/projects/OP-AMP/OP-AMP-1.html

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nobykobe (author)mpilchfamily2013-05-21

I want to know , how much voltage does the piezoelectric sensor generate so i can determine how to design the amplifier

Thanks

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