Ultrasound Transmitter-Receiver Contraption using Arduino

Projects General Guidance
1

Hi everyone
I'm trying to build a ultrasound transmitter-receiver contraption to measure the density gradients of an object for a school project. Due to some of the details of the project, I need a frequency of 58kHz for the transmitter, and I need multiple receivers that can capture the refracted wave.

But, I'm having multiple problems with this..

  1. I'm having a hard time finding a way to emit a wave at a frequency of 58kHz. According to the research I've done so far, I need a 100uH inductor and a 75nF capacitor but everything I can find seems to operate at very high voltages. And, I'm not sure if it'll work as intended if I change it
  2. I'm not sure if I should try to connect the whole contraption with one arduino R4 board, or if I should use multiple boards and connect them using RF communication(I've tried a couple projects with RF, but most of them failed due to sensor failure.. so I'm not confident on the products I buy) or if I should use a different method
  3. I'm not sure on the exact resistors, inductors, capacitors, and other stuff to actually make this work. I've tried to look for products but they just don't seem to match.

Right now, may current plan is buying these products
transmitter, receiver - CUSA-TR50-05-2000-W68
ADC - ADS1115 4channel 16bit ADC module
DDS signal generator - 0-40MHz, AD9850
Mosfet - MCP1407-E/P
12V-5V converter - 2 channel levle converter(12V ~ 5V)
adapter - SZH-PSU03
capacitor - 50V 103 0.01uF50VDC ceramic capacitor

I have around $350 in the current budget remaining but, if its important I can use a bit more.

Any suggestions or advice on how I should try to approach/fix some issues would really help!
Thanks for reading this, and any advice would be much appreciated :slight_smile:

2

In most cases the operating voltage is not what you are thinking it is. It is the maximum voltage the insulation will withstand, NOT an operating voltage. The inductance or capacitance value is the important rating. And in your case, buy kits of various values, since you are guessing at values you need.

3

The transducer you selected emits the wave.

You need a driver circuit that can produce a sine wave of about 58 kHz at up to 150 V, peak-to-peak, into an impedance of 3K Ohms.

The actual driving voltage required will depend on the properties of the substance you are investigating, and other project details and is best determined by experiment.

4

That sounds like an RF generator to me. Be sure you can set it to the frequency you need. Many RF generators are not granular enough to set that low of a frequency accurately.

5

No, it might work for the OP. It generates a square wave at the requested frequency. The good part is the data sheet even shows the PC board layouts for various versions of the chip, so using it will be a big step in the design of their printed circuit board.

6

I could not find it so I based it on the equipment I have, nice catch.