# Title Team Members TA Documents Sponsor
12 Pace Maker for Running
Aditya Singla
Carlos Sanchez Alberti
Mustafa Jamal
Daniel Ahn design_document1.pdf

If you are a beginner runner you will know how difficult it is to keep a constant pace during a long run. You have some ways to measure your pace like an AppleWatch or a smartphone, they give you information about your pace and your heart rate. The only problem with this is that you don't have any feedback until your training has ended, resulting in no real way to maintain your pace throughout the run. You need instant feedback on your pace to achieve your goals.

Solution Overview:

The solution is designing and building a laser device that you will wear on your chest, capable of tracking your pace and giving you real-time feedback on your performance. To do this, we should design a laser device that changes color depending on if your pace is too fast, too slow or you are keeping the ideal pace. Furthermore, the pointer will move further if you decrease your pace or closer if you increase it.

Solution Components

Component 1:
The first component of this project is the physical mount which can be worn by the runner. As shown in Figure 1, the mount would either be worn by the user on their head, or in the case of excessive weight, it may be worn by the user on their chest. Ideally we want the mount to be as lightweight as possible, thus we will be considering using plastic.

Component 2:
The second component of this project is the actual ‘brain’ behind this project. It will consist of a sensor (either GPS or an odometer) that will then be used to calculate the current pace of the runner and change the laser output accordingly (this will be done by Component 3). An important consideration here would be how often we want to calculate the runner’s pace for a smooth experience (i.e. if we calculate every second, every small change in pace due to obstacles might cause unnecessary outputs, but if we calculate in larger intervals, the runner may not be able to properly maintain their pace)

Component 3:
The third component is the servomotor. It will be an important part of the project because it will be in charge of controlling the angle of the laser. We want this component to be as light as possible.

Component 4:
One of the key elements will be the battery. We have to find a powerful enough battery, furthermore it has to be rechargeable and has to last at least 30 minutes. Another important aspect of this component will be its weight and size, ideally we want it to be as small and light as possible.

Component 5:
This component will be used to get the input from the runner about what pace they would like to run at. It should be a simple component with not more than 2-3 buttons (for increasing, decreasing, reset).

Criteria for Success:

The runner is able to track his speed during a run with a relatively high success rate. The laser pointer changes color/angle with the required sensitivity in response to changes in pace. It should also be viewable in all conditions. Additionally, the runner does not face any difficulty while wearing the device and the run is not interrupted or disturbed by it. Lastly, the device is able to withstand the duration of the run while completing the requirements described above.

Electronic Automatic Transmission for Bicycle

Tianqi Liu, Ruijie Qi, Xingkai Zhou

Featured Project

Tianqi Liu(tliu51)

Ruijie Qi(rqi2)

Xingkai Zhou(xzhou40)

Sometimes bikers might not which gear is the optimal one to select. Bicycle changes gears by pulling or releasing a steel cable mechanically. We could potentially automate gear changing by hooking up a servo motor to the gear cable. We could calculate the optimal gear under current condition by using several sensors: two hall effect sensors, one sensing cadence from the paddle and the other one sensing the overall speed from the wheel, we could also use pressure sensors on the paddle to determine how hard the biker is paddling. With these sensors, it would be sufficient enough for use detect different terrains since the biker tend to go slower and pedal slower for uphill or go faster and pedal faster for downhill. With all these information from the sensors, we could definitely find out the optimal gear electronically. We plan to take care of the shifting of rear derailleur, if we have more time we may consider modifying the front as well.

Besides shifting automatically, we plan to add a manual mode to our project as well. With manual mode activated, the rider could override the automatic system and select the gear on its own.

We found out another group did electronic bicycle shifting in Spring 2016, but they didn't have a automatic function and didn't have the sensor set-up like ours. Commercially, both SRAM and SHIMANO have electronic shifting products, but these products integrate the servo motor inside the derailleurs, and they have a price tag over $1000. Only professionals or rich enthusiasts can have a hand on them. As our system could potentially serve as an add-on device to all bicycles with gears, it would be much cheaper.

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