Can Piezoelectric sensor can be placed inside the oil filled transformer tank to detect the partial discharge.
About 20 years ago, we built a mechanical ultrasonic fingerprint scanner, the scan head, motor and piezoelectric sensor, were entirely submerged in oil. Just make sure you use a light mineral oil like baby oil. The oils used for cars have compounds to prevent rust and they can react with the transducer materials.
Thank you sir Henry for your kind informatiom. Sir, have you published any paper on that work if published please send me the paper.
Besides about 200 patens and applications, I did write a text book:
Ultrasound & Piezoelectric Physics for Engineers: A Primer with Applications and Examples https://www.amazon.com/Ultrasound-Piezoelectric-Physics-Engineers-Applications/dp/1793995389/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=1564355171&sr=
I don't recall publishing any white papers or articles specifically about operating mechanical ultrasound scanning systems in mineral oil, we just did it. We could not immerse the motors, encoders and precision slides in water because they'd short, so, we just used mineral oil. It worked great. Also, mineral oil can be ingested without any adverse effects, other than being a laxative. So it was safe.
Thank you very much Sir, Henry for your kind information and support. Actually, transformer oil is a mineral oil. Then, can I immerse the piezoelectric sensor inside mineral oil.
Thanks and Regards
Nilakanta
Nilakanta,
We've had a small high resolution scanning acoustic microscope immersed in mineral oil for about 12 to 15 years. We did have a minor problem in the first week. The insulating tape over the motor windings swelled up dissolved and dispersed into the oil leaving the backer film free to float around in the oil. We talked to the the motor vendor and he changed tape to one which was oil resistant. We also replaced the oil itself, since it had dissolved adhesive in it.
We never had a problem with the sensor itself.
Best,
Henry Savage
Thank you very much Sir for your kind information.
Thanks and Regards
Nilakanta
Of course you can, as long as you avoid some electrical problem that could damage the acquisition system. However, in practical terms it may not be adequate.
No need to insert inside the transformer oil.you can check it in literature also only u have to place outside the transformer tank with magnetic coupling.
Thank you very much Jorge Alfredo for your kind replied.
Thank you Kalyan for your kind response. Is there any problem if I placed it inside the transformer.