P18071: Wireless Concussion Detection

Customer Handoff & Final Project Documentation

Table of Contents

Team Vision for Final Demo and Handoff

Planned on Accomplishing


Test Results Summary

While testing our design, we had a document to track the results. while the major aspects of this will be talked about below, a link to our entire document can be found here

Range Testing

Tested the range capabilities of the controller and collector. The test was executed by setting up the collector and PC connected to the collector monitoring data packets collected. The Controller was then set 10 yards away and sent 20 packets. After the 20 packets were sent, if there were no packets dropped,the controller would be moved back 10 more yards and would send 20 more packets. This process was continued until the controller did not receive all 20 packets. Using the antenna on the collector and the controller board being in the line of sight from the collector, the controller board was able to be moved back 160 yards from the collector. At this range only 19 packets were received. The graph bellow shows how many packers were received for each distance.
Controller Board Range Testing

Controller Board Range Testing

DB Stress Testing

Tested the database read performance for singe read operation as opposed to multiple data points. the test was executed in a very similar fashion where a script put a load on the database and a second script was used get the read times. the results seem to show that it does not matter how much stress is on the DB but how fast the Ethernet connection the PC running the tests.
DB Stress Testing

DB Stress Testing

Operating Time

In order to estimate the device's operating time, the time it took the batter to reach its fully depleted state from nearly full capacity was tested using a current draw of 100mA. Using a much larger current allowed time to be saved as the possible operating time of the device was known to be in the hundreds. Knowing the total current being draw from the device and how many hours it took for the battery to discharge with 100mA, the range of operating time could be estimated
Battery Discharging Results

Battery Discharging Results

Testing showed that a current of 2.8mA would be drawn from the battery board when connected to the battery pack, and the controller board would draw a max of 5.5mA when transmitting. The current testing for the control board was done under the worst case scenario, so it can be assumed that the current draw on average will be far lower. Based on the numbers obtained, the device would run for 180 minimum hours at minimum. When taking into account that transmissions will be done periodically, the practical run-time of the device will be far longer and estimated to run beyond 300 hours with a maximum of 500 hours.




Impact Testing

Crown Impacts

Crown Impacts

The device was dropped from a height that exceeded what our 50 G accelerometer could calculate. Devices survived after 3D printed cases were used to protect them. Accelerometer survived best in the crown and ear locations. When placed on the forehead the accelerometer failed to withstand repeated impacts. Mounting method with screws and epoxy withstood impacts better than only epoxy. The final mounting method and location resulted in an average standard deviation of 2.39 and 2.94 for the crown and ear respectively.

Risk and Problem Tracking

Problem Tracking


Risk Management

Risk Management

Final Project Documentation




Future Work

Functional Demo Materials

A link to the pre-read document can be found here.

Plans for Wrap-up








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