Ultrasonic Transducer - scanlime:011

This video takes a close look at those little chirping sonar cylinders that might have helped your robot avoid bumping into furniture. They're sort of like a microphone or a speaker, but looking closer they seem more like a tiny tuning fork with a hat.

Help us caption & translate this video!

[AppliedScience]

Your videos are great! Thanks so much for spending the time to make them. The cork in those automotive ultrasound sensors is probably a cheap and effective sound absorber that reduces the echos caused by parts inside the car's bumper. Getting rid of acoustic energy from the transducer backside is surprisingly difficult sometimes.

I've often wondered about transmit vs receive air piezo elements. I'm starting to think its mostly marketing. Buying a "matched pair" makes it sound more valuable than just grabbing a handful of the devices from a bin.

[mindrobotsvideo]

brilliant!! I love the hands on approach and the "hey, let's try this" attitude. I feel like I'm sitting at your workbench exploring with you. Thanks, Micah! I walked away smarter than I was!

[JimBeshears]

Micah great video! I've worked with ultrasonics in the industrial world for 35 years first as a tech and the last 18 years I've worked for a company that makes sensors of all kinds, we make around half of the industrial ultrasonics in the world now. One of the uses for the silicone and the cork in the automotive sensor may be for mechanical isolation. If an ultrasonic sensor is mounted so that it can ring through the structure it is mounted to it sometimes causes an interference. It's kind of interesting that steam or compressed air leaks near an ultrasonic will interfere with them also, they throw off frequencies and harmonics close to what industrial distance sensors listen for. Air temperature has an effect on accuracy also, you can actually use an ultrasonic pair to measure air temperature.

[baconsledge]

Excellent video. More than I even thought I would need to know about these transducers. A lot of your experiments are things that I would not have thought of or had time for. It is great getting all that info on one thing, in one place at one time!!

[r.vasquezorr]

I have to give props to Mrs lady here.. ma'am from a to z threw out this whole video I was able to follow and understand of course mines slightly diff but I have to tell u there is only 1 other person to reach me on the level u have kinda like u we're explaining things as u carefully took things apart I was able to "explain" to self what u we're talking about even at times before u explained some things explained them a lil early but mines threw sound of bass vibration an using diff things to amplify an as well as the type I have to no how things work an why they work that way I'm sure u no exactly how that goes .. bit however I wanted to give u Monday an mounds of props and I have to say u don't get paid enough they need to double ur pay and either u are were or need to be a teacher the world can use ur help u no how to get on just about everyone's level of explanitories as well as pace like the glue that sticks things together and make a proper sturdy durable foundation well Mrs I must say U ARE THAT GLUE that's the only way I can explain it at this moment I'm just so excited that there's another one out there like myself but with alot more extensive vocab and prob 🥂🌋🏆🎖️📷📕📜📊📈⚖️💯💯💯🤙🖕👍👍👍👐👏👑....

[glennbartusch]

Out of the many DIY videos I've watched on YouTube (which would include just about everything produced by Ben @ Applied Science), this video would rank as one of the better ones I've seen.

One off the very rare times I'm subscribing to a YouTube channel. Thanks, limescan!

[akaTelo]

Great video, It's funny how much we take for granted in these cheap little sensors but there is so much interesting engineering in them. Also, those articulating lightbulb sockets you have for your desk are really cool haha

[Mods-Lover]

As a first timer to the channel and find the video as suggestion from some other video, the end was such a bummer I didn't expected am going to see a woman. Like I listened to whole video and thought am listening to some tech guy, I was bit shocked and amused with the reveal at the end. Guess you never knew what's coming. Giving you a sub tho 🤭

[AndreRossbach]

That's what I was looking for.
Very good explanation.
Thank you!

[hansroemerszoonvanderbrikk]

if you put a 40KHz sine into a T, then you take the same sine wave into an FM (SSB) modulator and connect it to another T, and you modulate with a signal coming from a microphone or an audio source, you should be able to achieve the laser counterpart of sound. The audible spectrum would be generated by the two ultrasonic waves beating when the second (modulated) one shifts. The interesting thing to do would be to test both free propagation, tube propagation and using a small offset parabolic dish

[MilanKarakas]

At 11:13, it is true that R performs slightly better than T, but it destroys if continous oscillations are used. I tried it for my project on ultrasonic parametric speaker, and getting pretty low amount of modulation on R in comparison to T element. Also, tried to overload both elements up to 150V peak to peak, and it get hot pretty soon. Even at 75 V p-p it works okay for modulated signal, but stil warm. T element survives much longer than R. On the other hand, R elements has better and stronger voltage output when ultrasound is present. I believe that difference is in ceramic - R element has probably more 'polarized' ceramic (something like electret), so that it gives more voltage out. But at cost of rapid destruction if used as a transmitter end.

[libervolucion]

This is exactly what I was looking for. Thank you very much for your effort.

[insightfool]

This is great! Thanks for coving this in so much detail.

[pierpa_pierpaolo]

I cannot follow your description since I do not speak English/American. :) I am interested in this topic and would like to understand "if" with these capsules can be used as a high frequency microphone? Behind the capsules is stamped T (TX) and R (RX) but we know very well that they are identical and it is only the dedicated IC that makes them work in TX and RX. What do you think?

[coyote]

Excellent experimentation. I have a handful of these transducers and never thought of tearing one open to see what makes it tick (pun intended)... :)

[lightman]

Outstanding video! Very thorough and detailed. Thanks for producing such a great tutorial on ultrasonic tx/rx.

[BillBinko]

I enjoyed this - one thought is that the variations between the Transmitters and Receivers may be ore evident at different distances (you only test very close distances where the differences may not matter).

[hpux]

Awesome! I bought a few of those years ago, and I've always wanted to have a good play with them. This satisfies some of that, and makes me want to dig them out. Was this the video with the improved audio? I noticed the noise reduction being a little weird at the beginning, but not at the end.

[NickMoore]

Thank you! I was Googling about these today for a future project, I should have checked your archive first >_<

[magnuswootton]

im making a delay line memory, this helped heaps thanks!!!