How do natural frequency sensors measure solid and vessel frequency?

[usmanmalik]

Hi all !

i want to know some of the devices that measure natural frequency of solids/vessels, etc !

with regards!
take care !

 

[Curl]

A microphone is such a device.

 

[usmanmalik]

Thanks for reply !
actually there is any liquid in tank..when liquid level rises or falls, natural frequency of that tank changes..i wana know devices to sense these changes !

 

[nasu]

How are you going to excite the vibration of the tank?

 

[usmanmalik]

because liquid level is changing in a vessel.