Hi I am newb to Arduino and electronics. I recently started a UG project and was provided with an Ultrasonic sensor https://bit.ly/44D9dD9 from Audiowell. I'd like to use this to send and receive Ultrasound through metal. Velocity of ultrasound in metal is 6020 m/s. Length of this bar of steel is 150mm and I need to somehow use Ultrasonic gel/couplant to stick it to the surface and check for surface deformation on the other side of the body as shown. How can I make it work. Will the hardware capability of Arduino hinder? Please let me know about the important parameters from the spec sheet. I did not understand the specification sheet of the sensor.
ALL are important
You need to drive the sensor with a 5V p-p sinewave at about 965KHz
The arduino can't generate sinewaves
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As this appears to be designed to couple into water it may not perform very well into steel as the acoustic impedance may be very different.
What order of magnitude of deformation are you hoping to detect? The frequency of the transducer is roughly 1 MHz, sound velocity is 6020m/s, so wavelength is 6020/1e6 metres = ~6mm. I would guess that it would be hard to get a surface deformation of a steel bar of much more than say 6 microns which is 1000 times smaller than the wavelength. You would struggle I think to detect such a small phase shift using this frequency or with the timing resolution of an Arduino.
I am looking for any kind of material loss on the surface with a lateral resolution in a range of 1 cm to 5 cm.
Do I need to use Teensy or some ARM based Microcontroller?
So, what needs to be done to make it work?
Beyond my expertise.
The only thing that will cause 1cm of material to be removed from the end of a steel bar is a saw or some form of machining!! Are you really just wanting to measure the length of the bar?
I suggest you Google "non destructive ultrasonic testing" and read up on the subject.
Years back I designed a gadget for crude ultrasonic testing in metal. It used a ceramic plate transducer about 15mm diameter, coupled through a polyurethane elastomer layer. The plate was charged to a couple of hundred volts DC and discharged by a thyristor to generate the pulse - I don't think you will get enough signal from an Arduino to get a detectable reflection.
Do you have the link to the project? I can do some reading.
I want to visualise the difference in the reflected sound waves with and without a deformation of this 1 cm magnitude.
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