Connection of Piezo Film Sensor

Former Member over 9 years ago

Hi,http://uk.farnell.com/prowave/fs-2513p/sensor-piezo-film/dp/1007374#similarProducts?COM=Experts

FS-2513P - PROWAVE - SENSOR, PIEZO FILM | Farnell element14

This Piezo Film Sensor has positive and negative terminals?

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michaelwylie over 9 years ago +1

Check the datasheet. You'll see their driving circuit where they are tying one pin to ground. In the case of a piezo I don't think it's necessary to ground one of the terminals, you could read it differential…
Former Member over 9 years ago in reply to shabaz +1

Thanks shabaz.

michaelwylie over 9 years ago

Check the datasheet. You'll see their driving circuit where they are tying one pin to ground. In the case of a piezo I don't think it's necessary to ground one of the terminals, you could read it differential if you want. Practically you will probably ground one of the terminals though.
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shabaz over 9 years ago

Hi Ng,

Some information on how to use these is here:
Impact, Vibration and Ultrasound Sensing with PVDF Piezo Sensors
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Former Member over 9 years ago in reply to shabaz

Hi shabaz,
I am planning to use PVDF film to measure the vibration (signal) due to the different type object's surface. Is PVDF film produce the charge when the force applies to the surface of PVDF film?
Thank you.
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shabaz over 9 years ago in reply to Former Member

Hi Ng,

Absolutely, this is a very good use-case for PVDF. I tried this too, to be able to identify the start position of paper stickers on a strip of peelable tape, and it was picking up vibrations from the rough surface of the paper : )
I believe (not tried it) that it could identify different objects due to the surface roughness, with some processing of the data.
I just used a strip of metal attached to act like a stylus (a bit like a record player) but flattened. You can see it in the URL mentioned earlier. Depending on your actual scenario, perhaps you may want to try different materials as a stylus, maybe even exotic things like sapphire or diamond, and some controlled way of moving it or the object, e.g. with a motor. If you're using a motor, you'll probably want something
high-end to get the smooth motion, or consult with some mechanical engineer since this could be an advanced topic in itself.
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Former Member over 9 years ago in reply to shabaz

Thanks shabaz.
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