Mechatronics Design, ME102B, Prof. Kazerooni, Spring 2014

so this is our 3d stereo lithographic 3d printer and we're able to build physical models of digital of digital models that we've created essentially there's UV curable resin that we trace a laser over the cross section of the park and it turns that that liquid into a solid then a Z stage basically increments it layer by layer and we're able to build up a physical model so most of the printers that you see on the market right now are extrusion essentially it's a very small hot glue gun what we've done is been able to increase the resolution by an order of magnitude by using the fine-tuned precision of a mirror turning with fine electronics with the laser beam instead of with a hot glue gun so this is a self-leveling a tripod originally we wanted to apply it towards nature photography with uneven ground and it would level itself so you don't have to go through all the manpower basically over here there's an on/off switch and up and down so you can move it up and it'll level you can move it down and you can move the legs anywhere you want and it'll just level itself there's just three linear actuators and accelerometer that checks the top values and it'll go back to zero there's a lot of power and mechanical engineering maybe we need some mechanical engineering photographers and artists to come up with some cool ideas so this is a desktop greenhouse it's controlled by a web app the user inputs the temperature and the light that they want over the course of their day then the greenhouse controls the light with an LED array and digital light sensor and it controls the temperature with a digital temperature sensor and a thermoelectric cooler and it has two fans so we mostly intended this to be used to for plants indoors we thought it might be nice for somebody who lives in the north if they wanted to have the plant to cheer them up during the winter or desktop rehab to help them out this is Kinect for the idea is to use mechatronics to interface with a like a real live board game so that people can interact with with a computer so what you'll do with this project is you drop a token into the Kinect for game and then the computer senses where you drop it and then calculates the best place to move and then moves itself yeah it's a lot like chess like so it's a much simpler game this is the Delta joyed the idea behind it is that we wanted a machine that was capable in real-time of reproducing human motion it can move in all three degrees of motion and keep up with your hand as it's moving on a computer just as quickly and as agile as you want it and from that we decide what can we do that's interesting so we decided to add on an extruding stage with frosting so then you can put a cookie in there and you can extrude frosting and draw it just as you would try to in your home with a normal frosting student so this is Fido Fido is a spherical robot and right now he rolls and is controlled based off of this controller it's basically like a joystick any way that you turn the joystick is where fighter will go the special thing about Fido is he's self balancing so that if you had a spherical robot that didn't have self balancing it wouldn't be able to roll because it would just always be falling over to one side so what we've done here is we put in a weight carriage that is it's on a closed loop basically so that it itself knows how to balance itself so that all you have to worry about is setting the robot where you want to go like a lot of people think of like oh this has to be immensely useful and solve every single problem known to mankind but honestly it's just kind of a fun personal assistant we were thinking I can carry things it can be like a mobile hotspot you can put your cell phone in it it could go get your coffee for you you could just put you know a little cup holder in there and just know oh don't talk to me talk to Fido my personal assistant so we built a camera gimbal that tracks a color in three-dimensional space so our subject wearing a blue shirt it's able to follow him up and down left and right as he moves around in space basically you tap the color on the screen of the camera phone and then it finds the centroid of his shirt sends the centroid to our Arduino Arduino talks to the motor control board which then angles the GoPro as it needs to to follow him so if we detach it it also stabilizes using accelerometers and gyroscopes and can also track him while it's stabilizing so an application would be to attach this to a quadcopter and basically you could be skiing down the mountain wearing a bright colored shirt they could track you and it would keep you in the center of the frame of the GoPro camera so then you'd have a great movie at the end of so this is my groups project we call it project Sidewinder because it's a mobile drive platform that's able to both translate and rotate and we accomplished this by having three independently controlled modules so each one of these modules can rotate and power the wheel separately from each other and what this allows us to do is both translate and rotate at the same time and this is different from traditional Drive drive platforms like cars because cars need to move forward and backwards in order to turn and what this allows us to do is both turn or translate and move basically in any direction it wants and it's able to do so so this is a project from 102 B we made a voice-activated safety helmet so everything is hands-free so let's give a demonstration open helmet turn on flashlight right flashlight up left flashlight down close helmet and that's our project all right so our product is doing a power assisted wheelchair and the idea is basically just to reduce the load on the average wheelchair user so when I push forward it'll push forward and give me a boost as well so if I go slowly it won't do much I just use our function if I give a bigger boost to turn on so what makes it go we have encoders behind it that are reading the position is essentially we're translating that into the acceleration and then from there the motors are turning on essentially when we reach a certain exceeding acceleration all right this is our M e-102 V project it is a laser tracking system it uses a image processing algorithm combined with a two axis gimbal that we designed to ideally keep a laser on top of the target while it moves including through fast motion an application those brought up to us that we hadn't even thought of was particle flow of law symmetry which is where small particles in a fluid flow are measured to track streamlines so this is an automatic bicycle transmission that will shift the gears for you as you change your cadence so as the RPMs on the pedals change it changes the gears along with you so the servo mechanisms right here they pull on this wire this gear cable and that's what shifts the chain back here and it changes gears but if we slow down it will begin to downshift and so right now we're going at about 20 rpms give or take and so after a couple revolutions it will take the average of those rpms and then it'll calculate what gear to go to after that and it will downshift to that gear there we go yeah so now like the cyclist can go around and they can just keep their hands on the handlebars without having to think about shifting gears or anything like that they can keep their focus on just riding so we're using three motors here and a lot of programming to make pictures onto a cylindrical object sort of dot by dot and we can process any image that we put into our code on the laptop and that sends a signal to the EM bed which is a microprocessor that tells the motors what to do and the pictures look like this they come out like this bear so and we can do any picture any text all right this is the script ER and what it does is it takes an image any image you can upload into MATLAB and it processes that image into a path from that path it's translated into Arduino and our control algorithm has this vehicle follow it using some magnetic encoders on the bottom of the vehicle the idea is just being able to take any image and blow it up as big as possible and so you don't have to be confined by the limitations of having a physical printer which can only print up to a certain size hey my name is payal and I'd like to present to you the prince area the world's first 3d theta food printer so as you see we use a very unique pneumatic system to drive the food through these tubes out to the nozzles this is the one of the highest capacity food printers we have a lot of foods around a lot of sweet foods a lot of savory foods around and we thought it'd be nice to have a stage that very accurately represented the round shapes that we wanted to make with the foods so in a traditional Cartesian system you have an x and y stage which would be like up-down left-right but instead of that what we have is we have R which is increasing radius of a circle and theta which is the number of degrees you go around the circle and by using these two coordinates we can still create a full coordinate system where we can print pretty much anything in the same amount of area but in a smaller amount of space and as far as we know there's been no other food system that uses this printing method for making food our big idea is to make these sorts of popular little sports cameras a bit easier to take nice video with this is our camera stabilization gimbal and it lets you hold a camera steady without paying attention to the orientation of the base this is just a fairly rough prototype here so you've got a motion sensor a notional measurement and three servos and Arduino to control it just I and plus this hand controller which lets us set an orientation once you set an orientation it holds that orientation steady regardless of the position of the base but basically if you're in a car and the sun's shining from the top depending on the angle these glides will come down or the rice is called smart shade so if I shine this flashlight up at the sunlight Center at four it will go all the way down and then up here it's more of an intermediate stage let's go all the way back and there's also the side shade kind of went from the other side and depending on where you put the light the shades adjust and move accordingly so this is our quadcopter here and we have an Android phone attached to it the quadcopter as you can see it's right here and the Android phone has an Android app on it that essentially is able to track the X&Y coordinates and then feed that information to the quadcopter and based on that the quadcopter is able to turn left or right in order for the object to be centered back into the center of the phone so applications involve general surveillance as well as security since it's able to track any type of object as a wide variety of applications but security and general surveillance is one of the major applications for this type of project okay scan here is a cost-effective solution for being a 3d scanner so what it does is it uses infrared sensors to take a model of any solid object and it generates a computer model that you can use to 3d print it's really fast an object like this mug would only take about 40 minutes to scan and then once you have the model of it you can immediately send it to a 3d printer and get that print right away

Channel: BerkeleyME

Views: 1,606,571

Rating: 4.9094925 out of 5

Keywords:

Id: 0ng--2sqdDo

Length: 12min 53sec (773 seconds)

Published: Thu Jun 05 2014