Project status - Chee Wee Lee
On Thursday we just got back our Gate review 2 report and it was surprisingly awesome as compared to our gate review 1 which we did very badly. It was a huge improvement - from an C to an A! (and I heard our report got the best score in class. yayyy!) It is indeed a good motivator for us, as all our hard work finally paid off (we spent days to edit the report!). Beside the report, we did a meeting to discuss about the next step for our project too. First of all, we discussed about the mechanism of the device we are going to produce, and the way of doing it. Basically our device divided into 4 parts: the physical body of device, mechanical mechanism to drive the device, electrical circuit and battery to provide energy to the device and the user usability of device. So our group sort of divided into groups to work on the few things mentioned above, and planning to meet again on Monday to combine the results/data that we get. Also, we are planning to buy a sheet of glass for testing in a man-made winter condition to prove the calculation/theories that we found. And the next would be fixing all the error we found during the testing to produce the ideal product for our project.
Existing/interesting finding – Ziwei Xie
In this week, we got feedback from
GateReview2 which was a big encourage to the whole team. Under every member’s
hard work, we finally made a big improvement from GateReview1. It encouraged me
a lot. During Thursday meeting, we discussed a lot of design details like the
motor methods, charge methods, handles and so on. We found that if we use chargeable
battery in our product, it would be convenient but cost too much. A regular
chargeable toothbrush costs about 20 dollars. However, we decide the price of
our product to be around 15 dollars. Chargeable battery turns not to be our
solution. Also, we found out another electric toothbrush moving in a trace of “Z”
while it was working. That was a useful finding as if we can make use of it, it
will definitely improve our deice efficiency.
Challenge - Yaqi Huang
After Gate Review 2, we are moving to a new
stage. At this stage, we need to figure how the force we need to break ice. Soright now, the first challenge for us is to make ice. Since the weather is notcold enough, we need to use freezer to make ice on glass. Then some sensorsneed to be used to find out the force. Once the maximum or minimum forces aredecided, the motor can also be decided. So the second challenge for us is to dosome literature research about the bending moment and how to decide the motorbased on force. After this we can figure out what kind of material should weuse and what motor should we choose. Another challenge for us is to use CAD tomake model in a week. It will take a lot of time.Future Plan - Ivan Manuel
"After receiving the good news from GR2 grade, we continue to focus on our future plan, and start dividing up the task right after Thursday class. We are planning to do the testing stage as soon as possible, in which Steven is responsible of buying the testing 0.5” thick glass, and Yaqi will buy the de-icer liquid from nearest store. Ivan already set up a meeting with Prof. John Luntz for any initial testing advice, and for access to the environmental chamber as well as force sensors. However, he has asked us to do some preliminary testing before hand, try to find a way to produce a nice layer of ice on the glass, test the de-icer liquid using a regular sprayer bottle, and also to test various brushes to see what works on the ice. On the other hand, Zi Wei will work on the device handle aesthetic design for best user experience. Optimization, motor selection, electrical, and mechanical integration, will be calculated by Steven, Yaqi, Queenie, and Chee-Wee respectively."
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