P19043: Essential Tremor Evaluation
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Integrated System Build & Test

Table of Contents

Team Vision for Integrated System Build & Test Phase

For the duration of this phase, we focused on bringing all of the subsystems together for assembly. The IMU and myomuscle sensors have all been attached to the housings and are wired up to the Arduino Mega. The Arduino Mega has been fixed into a prefabricated housing and attached onto the elastic banding. It still utilizes a pin port system for the wiring. The battery housing has been fixed and a switch and power can be provided wirelessly to the device. The device is able to communicate with the computer GUI and KST plotting features. Assembly instructions, calibration, and how-to guides are all still in the works for the final weeks of MSD II.

IMU Setup

The IMU and housing being shown wrapping around the hand.

The IMU and housing being shown wrapping around the hand.

The IMUs for both the wrist and hand

The IMUs for both the wrist and hand

The IMUs are fixed down within the 3D printed housing in order to prevent any noise from extraneous movement. To reinforce this, the 3D printed housing has been glued and sewn down to the elastic bands. The elastic bands have velcro sewn into them to allow the user to size the bands to various users.

Myomuscle Setup

A singular myomuscle with its housing attached.

A singular myomuscle with its housing attached.

The Myomuscles adhere directly to the skin via gel electrodes. Because of this, the housings for the myomuscles do not consist of an elastic strap, but do have a 3D printed housing to protect the sensitive electronics from direct impacts. The housing is rigid and does not interfere with the collection of the signal.

Power Integration

The power subsystem is capable of powering each of the other electrical subsystems on the Arm device. The power monitor has not yet been calibrated, but otherwise, we were able to make the device totally wireless in terms of power. We ran into a problem attempting to power components of our device off of digital output pins. Upon realizing, we installed a manual splitter. With the addition of the splitter we are able to receive data capture without tether to the device.

Arduino Housing Integration

The final piece of hardware integrated was the Arduino housing. This was the only prefabricated housing that we used in our design. This decision was made due to our concerns about the time it would take to custom design and print a housing that would fit our needs. We proceeded to adjust our design to one that would work with the prefabricated Arduino housing. What we failed to realize was that the tight openings above the Arduino pins would block our vision when plugging our cables in. Due to this, we needed to modify the prefabricated housing to allow for plug-in room.

Whole Device Setup

The entire DAQ assembled on the right arm. This is from the demo phase.

The entire DAQ assembled on the right arm. This is from the demo phase.

This photo shows the device in its current iteration and demo phase. It shows the entire DAQ and how it currently fixes to a patient. From here, the wiring scheme will be cleaned up as best as possible, while the elastic straps will be fixed to make them more intuitive and robust.

Subsystem Integration

DAQ Subsystem:

Power Subsystem

Communication:

Software:

Risk and Problem Tracking

Risk Management Data

Issue Management Log

Plans for next phase and relevant documentation

Final Phase Individual Project Plans.docx

Peer Evaluation Sheets5.xlsx

Gantt Chart


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