1
\$\begingroup\$

I try to use single piezo as transceiver. Is this possible if i can T/R switch using FET or BJT ? I found this schematich but not sure if it works. https://www.researchgate.net/publication/252602894_Design_of_Pic-Controlled_Pulsed_Ultrasonic_Transmitter_for_Measuring_Gingiva_Thickness/figures?lo=1&utm_source=google&utm_medium=organic enter image description here

In somewhere nearby the blue cursor at right side echo signal must be showing but not. RC circuit below the tx is symbolling the PZT. enter image description here enter image description here

\$\endgroup\$
7
  • \$\begingroup\$ Why don't you run the circuit through a simulation tool (like most EEs do these days)? \$\endgroup\$ Commented Jul 3, 2024 at 20:07
  • \$\begingroup\$ i dont have enough parameters to simulate the piezo \$\endgroup\$ Commented Jul 3, 2024 at 20:10
  • \$\begingroup\$ Yes, it can work ... Just add Tx and Rx. Sometimes, a transfo is also used ... \$\endgroup\$ Commented Jul 3, 2024 at 20:37
  • 1
    \$\begingroup\$ Do i have to drive the piezo at really high voltages ? I was trying to do with 5Vpp (arduino digitalwrite) \$\endgroup\$ Commented Jul 3, 2024 at 21:02
  • 1
    \$\begingroup\$ @alidemir If the range is 32 mm, as depicted in the oscillogram, you can't use 4 kHz (a number used in your previous post) as the wavelength is about 85 mm. Using a 40 kHz transducer, you may have a better chance if Q of the transducer is sufficiently low enough where the ringing has died down. At this range, you probably don't need much drive level, i.e., 5 V drive may be enough. You many need to put a resistor across the ceramic to lower the Q or use an acoustically absorbent backing to lower the Q. \$\endgroup\$ Commented Jul 3, 2024 at 22:27

0

Reset to default

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.