Project. I made an upgraded version of an ultrasonic levitation device.. The previous version had a height of only 2.5 cm and a narrow effect range that could barely be aligned vertically in a row.. This time the height has been enhanced to 9.5 cm, almost four times the height of the previous version.. At the same time, it was possible to extend the levitating area to the front back left and right. When the camera approached the interference of the sound waves changed and some of them fell. Control is quite severe.. It consists of 3D printer parts, electronic circuits and general purpose parts.. After this we will show you the fabrication process in order.. Modeling will be done in Fusion360.. All ultrasonic elements are placed so that their extension lines intersect. Since 40 kHz drive, is assumed. The distance between the opposing elements is designed in multiples of 8.5 mm to match the length of the wavelength.. The upper and lower units are basically of contrasting construction.. The opposing elements face each other.. These base parts are a combination of 3D printer output, material, aluminum, channel material and wood.. The output is made with Photon S and water washable resin., When washable resin is made hollow. It is difficult to cure to the inside and I had an experience that the uncured liquid inside leaked out at a later date.. Since then, 100 fill rate is my rule for washable resin., The upper and lower pairs were output.. The front of the right side is ripped.

. If it is this bad, we can repair it by hand.. Tamiya putty is great to use for quite a long time. After opening the package. Fill in the putty with a solid surface on the premise that it will be scraped off, later. Polished, flat., Then paint it.. The bottom of the round hole is masked due to gluing the ultrasonic element., My favorite Mr. Finishing Surfacer.. This is an affordable paint job with only a top coat of clear paint on it., Remove the masking by utilizing the resistors on hand. The holes for the electrodes of the elements made it easy to peel off.. This time I set the number of ultrasonic elements to be larger, so there is a lot of repetitive work, including the upper and lower parts.. The ultrasonic elements used in this project are small and rated at 40 kHz.. I would have liked to order 10000 units to avoid any suspicion, but I ordered 72 units. Temporary placement of the ultrasonic elements.. I will check to make sure there is no wobble or interference with the electrodes and the main body.. The electrodes and interference seem to be OK, so we glued all of them in place.. They are nicely facing inward in stages.. Wiring is done on the back side.. The elements are marked for polarity, but I have checked all of them to make sure there are no mistakes. Finish each one for the top and bottom in the same way.

For wiring, we use 0.8 mm solder plated wire.. The ultrasonic element is driven by the same combination of Arduino and motor driver as before.. I connected the and poles to the back wiring, as shown earlier. For the upper and lower coupling using an aluminum. U shaped channel. Fix one side first and if there is no problem with operation fix the other side as well. One energization test was performed here., The motor driver is subjected to a load there, so it is done in a short time.. It was confirmed that it was successfully levitated.. I was in such a hurry that I only left a still picture.. The rest is decoration.. It has little to do with function.. First, we cut a thin piece of wood.. Once the surface is evened out, we will color it with craft varnish.. It absorbs a lot of varnish, so I applied about four coats after that. Glue the parts to the main body and place a blindfold around the four directions and the top surface. To prevent floating objects from falling into the gaps between the elements. A mesh guard is attached. Mesh and other thin materials allow sound waves to pass through without disturbing them.. They are positioned as transparent in terms of sound waves., Its complete When inserting an object to be floated. The object is placed on the mesh material once and then placed in the air to prevent the sound waves from being disturbed by hands or other objects.

. There are points in the air at regular intervals, where the object is attracted and stays there.. The mechanism is explained in the previous video.. There is a link in the overview section.. Please check it out, Even though the distance is considerably longer than the previous one. There is a sense that the fixation in the air has become rather stronger.. You can clearly see the feeling of floating when you move the camera side.. What floats are foam beads.? They are lightweight small and solid.. I experimented to see if I could float a drop of water, but it didnt work.. Neither the fine droplets of water from the misting spray nor the vape smoke could be kept in the air. Conditions seem to be tough.. I was worried because I had used so many ultrasonic elements, but I was relieved to see that I succeeded in creating a properly wide levitation area. When touched with a finger. It tends to fall down due to sonic interference.. There is no particular feeling of heat or sound waves hitting the area.. This high frequency range should not be audible, but there was a slight sound as if the frequency changes due to various interferences.. I think this sound may be unpleasant for some listeners, so I will play a little of the sound I caught at the end of the video.. I also tried to levitate it by turning it on its side and using sound waves from both sides.

. It was still tough but a little successful.. If we could hold it more strongly with this arrangement, it could be used for a reticle on the sight, scope or something …. This is the end of this video.. There are many things to reflect on, such as the elements should have been vertically opposed.. I am glad that I enjoyed working on issues such as setting up pseudo surfaces and modeling for single point convergence.. I would like to make strange things again., If you like. Please subscribe to my channel, Thank you for watching to the end. Extra.. This is the sound of the camera. Picking up the movement., The volume will be kept low, but please note if you do not like high pitched sounds. High tone is being played back. If you actually hear it with the ear, it is a little more faint sound, but you can hear the high pitch sound. That seems to be shaken by the surrounding objects. High tone stopped. Almost the entire film has this kind of high pitched or breathy sound. recorded in almost the entire film, so we cut the sound in the main film.. This is the end of the extras..

https://www.youtube.com/watch?v=GoPw2c3bEHA