This week the team split up the tasks required to finish the project. Galen will be working on the mechanical design and utilizing the index finger design for all the fingers we will be testing. In addition, he is currently thinking about how to create a design the project for use on the wrist. The whole team will be meeting Jake from Objex this Friday at 2:30PM. On the software side, Chris will be working on converting the Arduino code thus far into Matlab in preparation for the additional processing power that will be needed when more sensors and feedback are added to the device. He will also attempt to incorporate audio biofeedback to the device via Matlab as well. Olivia has worked on adjacent tasks such as uploading past weekly reports onto the website and being the team “expert” on Design Safe so we will know exactly how to wrap up this project. Olivia will also work on creating the GUI (graphic user interface) through Matlab that we’ll need to integrate software with end user experience.
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The team was not able to complete much during Spring Break. The team is currently trying to plan the last 5 weeks to figure out what task are immediate currently to finish the project. Some current plans include emailing Jake Salter again to ask for a time to meet up and discuss our mechanical design. We will also pick up the Verification and Validation report and review the comments to see where we can work on for the coming future.
After just finishing the Verification and Validation report, we are mainly preparing the presentation for Wednesday. In the meantime, Galen is attempting to print out the Single Slider Design, which is our second iteration mechanical design for placing the potentiometer on the finger and wrist joint. We managed to fit in the potentiometer and show the proof that the design could work. At some point we may have to reach out to Jake Salter from Objex Design for assistance for making the design work. We also were able to talk to Dr. Carter on Wednesday (3/7) and show us our Verification and Validation Powerpoint. For some of Yin’s questions such as colocalization surface area and resolution, we were able to get Dr. Carter’s approval that we should not let surface area restrict our design and use an angular resolution higher than 0.2793 degrees. In addition, Dr. Carter said he is find with using higher frequency beeping for feedback and gave us advice with some of mechanical device. We also plan on getting Dr. Carter a drawing of what the final prototype would possibly look like. In the meantime, Dr. Carter has said that he will look into the active range of motion and get back to us.
This week we worked on the proof of concept for our device to ensure that the potentiometer will work to measure angles and would work on a one degree of freedom door hinge joint. Galen helped to create a joint scaffold that could support a sensor without restricting movement. This or another design will be crucial in fixing the potentiometer to the hand in a way that can measure the angular displacement of the fingers and wrist.
Chris met with Dr. Klaesner on Monday morning to gain more guidance. He suggested creating a calibration curve to show that the potentiometer can accurately measure angles. Chris and Olivia were able to successfully develop an accurate and nearly perfectly linear calibration curve to convert the potentiometer reading to an angle. Using that equation, Chris was able to scale the brightness of an LED based on the angle and create an LED intensity vs. angular displacement plot using a photoresistor. Chris and Galen met with Dr. Klaesner again on Wednesday to ask more about the mechanical design of the potentiometer holder. He suggested contacting Jake Salter of Objex Designs for guidance in the mechanical design. We will try to arrange a meeting with him for after spring break. We will also work to collect more data and write the Validation and Verification report as the deadline approaches draws near. We will likely meet with Dr. Carter to show him and double check our progress next week. |
AuthorJust your average engineering students -- solving problems yet to be solved Archives
April 2018
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