Ultrasonic tranductor - 1MHz

[unavezmasysale]

Dear,

We are trying to develop an ultrasonic flow meter. Up to now, the bottle neck of the project are the TX/RX sensors.
We will design the schematics for the transmitter and the receiver nor being this the issue.
Our problems has to be with the piezoelectric material to resonance at 1MHz.

-Has somebody experience making this kind of transductors?
-Where can we buy them?

Images:







Any idea is very helpfull for us.

Thanks in advance.

 

[esp1]

hi,
This link shows a selection of suppliers
E
https://www.google.co.uk/search?q=1...hannel=sb&gfe_rd=cr&ei=DzLVU_iOH6jo7AbdxICIDg

 

[Externet]

Cheap ones:
----> https://uk.alibaba.com/product/428626519-Ultrasonic-Humidifier-Piezoelectric-Transducer.html

 

[amayilsamy]

You can go with 40 KHz ultrasonic transducer. Bacause, It is easily available in local market and you can design a Tx with timer 555. Rx with LM386 or op amps..

 

[FvM]

Our problems has to be with the piezoelectric material to resonance at 1MHz.

A piezoceramic disc of 4 mm height resonates at about 1 MHz.

Design challenges are achieving the acoustic impedance matching to the liquid and an aborptive "backing" of the resonator to increase the bandwidth.

If you don't have the engineering background to design your own transducers (as the major metrology companies do), look for specialized utrasonic transducer manufacturers.

 

[unavezmasysale]

Thanks boys,
At the moment we will start buying a piezoelectric disc in the local market. After that, we will try to make to resonances in 1Mhz and start transmitting and receiving the signal.
FvM, here in Argentina I do not know a company that can make the enginnering background for the transductors and not one where we can buy specilized ultrasonic transductors. So I think that after the test that I describe previously we must think to buy the transductors in the global market that is very difficult for us.

- - - Updated - - -

-Has somebody experience making this kind of transductors?

 

[FvM]

Some manufaturers are supplying piezo discs in wider size range, e.g.:
**broken link removed**

I see from the list that my previous assumption about resonance frequency was wrong by factor of two. It's actually 30 years ago that I worked on this topic.