Archive for the 'Initial Writeups' Category
Deliberate Gecko – Prototype II: RPTC

 

Description of Idea:

This unit is a dual-axes mounted digital camera and microscope set that enables its users to easily view film plots on a conventional back-lit plot table. The device will provide the following features:

  1. Provides uninhibited viewing access to plot table surface
  2. Course and fine access adjustment
  3. High-resolution digital images can be saved by computer
  4. Accessible to persons unable to use conventional microscopes
  5. Easy to assemble and physically robust
  6. Ergonomically friendly 
 

Description of Prototype:

The RPTC will move a test equipment set across a plot table in two axes. The test equipment set will consist of a digital camera for quick viewing and a digital microscope for detailed inspection of film plotted images. The x- and y-axis travel will be provided by a combination of motors, steel wire, and pulleys. Framework will be provided by ¾” rigid conduit, allowing for x-axis movement. This conduit will not only provide a surface for the equipment to ride on but will also provide a passage for wiring. The y-axis movement will be provided by a carousel gliding on square aluminum attached to furniture glides riding on the outer framework. Digital inspection equipment will be mounted in the center of the carousel. Carousel, inspection equipment, and square aluminum and furniture glides will form a complete central assembly. This assembly can be removed from the framework after detachment of control cable wiring harness. Controls will be provided via joystick and variable rheostat for coarse and fine control. Microscope and camera controls will also be provided. Control cabling will be suspended in strain loops from auto-retracting line. Second working prototype will consist of tethered wired controls on a completely assembled framework system, complete with motors for each axis.

 

Timeline:

date process and goals comments
Apr 2
  • Figure out stepper motor sequences for motor use with arduino.
  • Program rudimentary arduino timing sequence for stepper motor steps.
  • Find viable control system for user control input
 
Apr 9
  • Finish large pulley assembly on framework for X-axis travel
  • Smooth out stepper motor movements
 
Apr 16
  • Finish hard mounting arduino in carousel
  • Have motors controllable in all directions.
 
Apr 23
  • Finish prototype 2, finish the report on prototype 2, add bells and whistles to prototype 2
 
Apr 26
  • Present at engineering open house!
 

Materials Needed:

Qty

Item (with link)

Unit Cost

Comments

4

¾” rigid conduit (or IMC) (10’ stick)

13.60

 

4

¾” rigid L-body

5.31

 

2

Square aluminum

 

 

1

Nylon furniture glides

 

 

1

Steel wire

 

 

6

1” diameter pulley

2.00

 

1

8” steel junction box

35.00

 

1

Aluminum carriage

 

Purchased at yard

4

Nylon bushings

 

 

4

½” conduit strap

 

 

2

Stepper motor

 

Scavenged from lab

?

Fasteners

 

 

?

Wiring

 

 

1

Joystick

 

 

4

Encoders

 

Encoders

1

120VAC/24-12VDC Power Supply

 

 

3! – Prototype II: Mechanical camera control system for wheelchair

 

Description of Idea:

The project is a mechanical control system for clients who are disabled and uses wheelchairs. People with disabilities have trouble in using a camera. Camera is a way we can capture the moments of our life and save it to share it with others. People who uses wheelchairs often have trouble in holding the camera and taking pictures or videos at the same time. In this project, we are exploring an effective control system that is easy to control for the targeted clients.

Description of Prototype:

Mechanical design includes the base where camera can be mounted (screwed). The control system will be capable to tilt the camera. The base could spin full 360 degree rotation so that clients can take pictures of their own or show a picture to others once they take it. Whole base could also be moved up and down. Clients will be able to control the position of the camera and once it is set they can manually control the interface of the camera. This feature will aid them to take shots in less time and will also solve the problem of lifting the weight of the camera.We are using servos and motor for positioning the camera. Arduino uno board will be the interface between the joysticks and motors.

 

Timeline:

 

date process and goals comments
Apr 2
  • Build gears and support parts for the design
  • Program arduino to improve the joystick coordination with servos
  • Start working on the top part of the design with pan and tilt movement
 
Apr 9
  • Finish the top part of the design (if not completed)
  • Build the framework for up down movement
  • Try to implement the lock mechanism in up down movement
 
Apr 16
  • Implement control system on the design
  • Put every thing together and test
 
Apr 26
  • prototype completed, working, report submitted
 

Materials Needed:

 

qty items
unit cost comments and links
8 3 inch ball bearing 4.95 https://www.servocity.com/html/ball_bearing_turntables.html
1 arduino uno 0 From Lab
1 Used Triopd ~25-35 Local stores or craigslist
1 Servos ? We have used the servos from our lab for the prototype I and would buy if needed
2 Aluminum plate ~10-30

Hardware stores ( use as support for the base of the camera)

Ex:http://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=aluminum+plate&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+All

2  Joystick  0  We are using a joystick that we opened from a remote control
BitShifters – Prototype II: Shelf Assist

 

Description of Idea:

 A remote-controlled system to lower upper shelving units to provide easy access to wheelchair occupants. Functionality would include ability to operate each cabinet independently, and would restrict multiple cabinets from being out at the same time for safety reasons.  Each cabinet would have a shelving unit inside that would be brought out by folding arms and a rotating motor.  The controller would be wireless, operating off either Bluetooth or RF.  The shelf could include a button on the cabinet.  This system would make shelves accessible to people in wheelchairs.

Description of Prototype:

This prototype would be an extension of the manual lowering shelf. One of the gas shock absorbers on the side of the shelf would be replaced with a linear actuator to motorize the shelf. Holes may need to be drilled into the lowering arm, so that the motor can extend the shelf to the desired position. One or both of the springs may be removed to reduce the power consumption of the motor. The motor would be controlled using a Bluetooth controller integrated with an arduino micro controller. The arduino could control how far the shelf would go down. The details of the arduino portion of the prototype would be examined after the shelf is motorized.

 

Motor to be mounted on the shelf arm


motor rating

Timeline:

date process and goals comments
Apr 2
  • Replace shock absorber and springs with the motor.
  • See if the motor supplied by Gregg is acceptable.
  • If motor doesn’t work, start searching for a suitable motor.
  • Meet with CPRF residents (Sherie, Sherridan, Jerry). Get feedback.
 
Apr 9
  • Have a suitable motor.
  • Have the desired movement of the shelf completed.
  • Start programming the arduino to control the shelf
 
Apr 16
  • Continue programming the arduino.
  • Conduct load tests on the shelf.
 
Aor 23
  • Finalize the automated shelf.
  • Have the shelf working with a wireless controller.
  • Submit report
 

Materials Needed:

qty item with link unit cost comments
1 lowering shelf 190 already bought from Menards
1 arduino uno 0 checked out from Tom
1 linear actuator 0? potential actuator supplied by Gregg
       
       
       
       
       
[Team 4] – Prototype II: Jar opener/closer

Description of Idea:

This product will take an already existing product and allow it to be modified and greatly enhanced. The basic purpose of the original device is to simply remove lids jars. Our design will do this and will be able to screw the lids back on.  It will do this automatically with the push of a button.  This extended feature will help residents of CPRF and perhaps countless others.  

Description of Prototype:

In our prototype we have a revolving platform that a jar or bottle can be placed on it will will rotate either way. This was our first step was to make the motor switch back and forth. In our next prototype we will have the top portion of our device. It will lower down and apply pressure to the lids and then the base will rotate and remove the lids. 

We will test it by trying many different sizes of lids and jars. 

Timeline:

The below table is just an example for how you might do a timeline. Content in the table is also just example content. Feel free to change and restructure the below table as you wish:

date process and goals comments
Apr 2
  • Have motors in and new base enclosure finished.
  • Have top portion initially finished
  • email CPRF resident questions
 
Apr 9
  • Have motors working on and top portion complete
 
Apr 16
  • Prototype complete and testing with various jar lids
 
Apr 26
  • prototype completed, working, report submitted
 

Materials Needed:

 

qty item with link unit cost comments
2 Nema17 hybrid step motors 21  
2 Corkscrew shafts 10  
       
       
A Team – Prototype II: Micro Cyber Watch Dog

 

Description of Idea:

 A wireless micro robot that will have the ability to aid law enforcement or other public safety organizations by giving them the ability to access unknown locations or enclosed areas where there are unkown dangers.  The micro robot will also give them the ability to access places not accessable by other means.  It will also have the ability to survaillance the area, and provide, or produce audio/video.

Description of Prototype:

For the second prototype, we are planning on making the microbot wireless and giving the robot the ability to transmit video throughout a camera.

Timeline:

 

date process and goals comments
Apr 2
  • Most components are in. Start initial playing with components, figuring out how they work.
    • Xbee
    • Start Modifying Existing Camera, if not do-able order a new camera.
  • Research gears manufacturers…
 
Apr 9
  • Order new micro camera if modifying of existing camera was not possible (previous week).
 
Apr 16
  • Prepare for Open-House
    • Start working on Visual Display.
  • Start working on Prototype II Final Report.
 
Apr 26
  • prototype completed, working, Final report submitted
 

Materials Needed:

Person to contact: gaperalta@wichita.edu

qty item with link unit cost comments Links
2 Xbee 20-40  pro version is smaller…

http://www.mouser.com/Search/Refine.aspx?Keyword=xbee+pro

https://www.sparkfun.com/search/results?term=xbee&what=products

1 Arduino Nano ???  free if John has one for us and we choose to use it.  
1  Xbee programming interface  20-30    https://www.sparkfun.com/search/results?term=xbee&what=products
 1  Wireless Micro Camera  20-80  We are trying to modify existing camera; if not possible order a micro-cam(more expensive) http://www.amazon.com/Mini-Wireless-Color-Camera-Microphone/dp/B000YM2OIK/ref=sr_1_1?ie=UTF8&qid=1364251358&sr=8-1&keywords=micro+wireless+color+camera
 1-3  LiPo batteries  5-15  depends on camera….

 http://www.amazon.com/Venom-800mAh-Battery-Micro-Molex/dp/B0043CMTLO/ref=sr_1_5?ie=UTF8&qid=1364251638&sr=8-5&keywords=lipo+11.1

http://www.hobbyking.com/hobbyking/store/__86__85__Batteries_Accessories-Li_Poly_All_brands_.html

 1  battery charger  18  possibly this one. depends on what batterie(s) are used http://www.amazon.com/Venom-Cell-LiPO-Balance-Charger/dp/B000HKEVO4/ref=sr_1_2?ie=UTF8&qid=1364251819&sr=8-2&keywords=venom+battery+charger 
         
         
         
         
Eh Team – Prototype II: Universal Wheelchair System

Description of Idea:

 The product is an open source system that will allow for easy addition of capabilities to a wheelchair.  Users will interface with the system through an android-based tablet.  Installed on the tablet will be an app that we will have written to communicate with an arduino to perform basic capabilities.  The app will communicate with the arduino either through USB or through a soft modem.  The app coding will be open sourced to future design teams to allow for future capabilities to be added to the wheelchair with greater ease.

Description of Prototype:

This prototype should be able to communicate with an Arduino UNO to perform at least two basic functions.  In this prototype we will also try to create two-way communication between the tablet and Arduino, so that the app will not only send commands, but it will also display data received.  We hope to begin interfacing the app to a remote control, as this was one of the most repeated suggestions by CPRF residents.

Timeline:

date process and goals comments
Apr 2
  • Continue trying to allow for USB communication between app and Arduino
 
Apr 9
  • Make determination if USB communication is possible, or if we must make switch to soft modem
  • Continue working on coding on app
 
Apr q6
  • Continue coding on app
  • If communication between Arduino and app is successful, begin researching ways to use Arduino to interface with remote controls for CPRF residents
     
 
Apr 26
  • Complete interface from app to Remote Control
 

Materials Needed:

All of our materials are already purchased.

qty item with link unit cost comments
       
       
       
       
       
       
       
       
       
       
Blue Team – Prototype II: Smart Cushion

 

Description of Idea:

This product is a seat cushion intended for use by individuals with reduced lower-body movement and sensation.  Its primary aim is to reduce incidence of pressure sores.  Because pressure sores are caused by uneven weight distribution, whereby one fleshy area incurs a disproportionate amount of force, the cushion will respond to variations in the user’s posture and equalize pressure across the contact area.  The cushion will consist of a two-dimensional matrix of independent air chambers which are inflated via a small compressor motor.  A micro-controller will monitor air pressure readings and ensure that each chamber’s pressure stays in the target range. 

Description of Prototype:

For the prototype II we are planning to implement a pump to alter the pressure of the air cells in real time and use a graph to give a visual display of the pressures in each cell.  

Timeline:

date process and goals comments
Apr 2
  • Find a suitable pump for our design.
  • Find solenoid valves to use with the pump.
  • Get loaner seat cushion from Greg at CPRF
 
Apr 9
  • Modify Arduino and Processing code for pump and valve implementation
  • Modify tubing/connectors for integration with borrowed seat cushion
 
Apr 16
  • Start graphical output implementation
  • Check sensor values against air pressure gauge for consistency.
 
Apr 23
  • Finish graphical output implementation.
  • Fix any last minute problems/aesthetics.
  • Prepare the presentation board for Engineering Open House
 

Materials Needed:

qty item with link unit cost comments
1 Air Pump ?  
4 Solenoid valves ?  
? Assorted Pump Connectors    ~$20.00 Total    
2 Pressure Sensors $15.00  
1 Pressure Cushion $0.00 Borrowing From Greg at CPRF
1 Motor Shield ? Will get more info from John about this