PVDF film to record high-speed dynamic force

HM2002 over 2 years ago

Hello

Do you know if TE Connectivity's PVDF films can be used as sensors for measuring high-speed impacts? The frequency range of the signal to be measured is between 3 kHz and 2 MHz. However, there is no information about the frequency range in the datasheet. If anyone has experience using PVDF films for this purpose, I would be grateful for their guidance on which film I should purchase.

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michaelkellett over 2 years ago +1

Can you explain your application in more detail. It isn't going to be easy to apply mechanical stimulus to one these devices at 2MHz. In any solid or semi solid material the devices will be a great many…
bidrohini over 2 years ago +1

It is essential to verify if the PVDF film you are considering can operate effectively within this frequency range. While PVDF films generally offer a wide bandwidth, the exact frequency response may vary…
dougw over 2 years ago +1

PVDF film can measure high speed impacts, although you will need careful attention to geometry to get more than simple impact detection. As Michael pointed out, any data in the MHz range will be problematic…

HM2002 over 2 years ago

https://www.te.com/usa-en/product-CAT-PFS0005.html

https://www.te.com/usa-en/product-11031263-00.html

https://www.te.com/usa-en/product-CAT-PFS0007.html

https://www.te.com/usa-en/product-CAT-PFS0004.html

https://www.te.com/usa-en/product-CAT-PFS0008.html

https://www.te.com/usa-en/product-CAT-PFS0003.html
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michaelkellett over 2 years ago

Can you explain your application in more detail.

It isn't going to be easy to apply mechanical stimulus to one these devices at 2MHz. In any solid or semi solid material the devices will be a great many wavelengths long at 2MHz and this will give them very strange directional characteristics. The interface between the sensor and media will have a large effect on frequency response.

Thin film piezo devices can (and have been) be constructed with very high operating frequencies.

Since you mention high speed impacts I would like to be sure that the application is not weapons related.

MK
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bidrohini over 2 years ago

It is essential to verify if the PVDF film you are considering can operate effectively within this frequency range. While PVDF films generally offer a wide bandwidth, the exact frequency response may vary based on the film's thickness, processing, and the specific product line.
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dougw over 2 years ago

PVDF film can measure high speed impacts, although you will need careful attention to geometry to get more than simple impact detection. As Michael pointed out, any data in the MHz range will be problematic.
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