Drive Circuits for Ultrasonics Transducer

[Soinn]

HI,

I'm currently working on the drive circuits for both transmitting and receiving circuits.

I'm trying to implement the phase-delay method to steer the scanning beams of 4 ultrasonics transmitters and there will be a receiver to pick up the signal reflected.

Most of the circuits that I found on the web are mostly drive circuits for a single ultrasonic transmitter.

I really have no idea on how to carry the phase-delay method to steer the scanning beams. Could anyone Please give me so directions or hints? Thank you so much!

 

[Soinn]

By the way, the frequency is running at 40KHz.

suggestions are welcome.

Soinn

 

[Soinn]

Hi all,

beside using a 555 timer to drive or to send a ping in the transmitting circuit, is there any other ways? Please help!

I came accross with frequency modulation from the net, but I'm really have no idea with this method (freq Modulation). Could anyone pls help?

Cheers