P10010: Motion Tracking Sensor


Table of Contents

Step 1. Clarify The Problem

As the objective of this motion tracking project is to provide the foundation for a fully portable motion tracking system, we must consider the daily abuse this system may take from its users. Users may accidentally drop the system, bump into obstacles, or expose it to unexpected forces.

The innards of any motion tracking system will most likely be extremely sensitive to said forces. Hence, some form of enclosures should be present, which does all of the following:

  1. Protects the sensors and microcontroller from external forces
  2. Does not hinder our efforts to be "wearable" without extreme user discomfort
  3. Interfaces with P10011's human interface device
  4. Is sufficiently sanitary
  5. Does not interfere with the sensor accuracy

Step 2. Search Externally

Sanitary Regulations:

Sensor Enclosures Used on the Market


public/Images/sensors.jpg , public/Images/suit.jpg

public/Images/chip.jpg public/Images/box.jpg

Step 3. Search Internally

Most motion tracking devices developed by prior RIT MSD projects were not designed for portable usage, and hence do not have a focus on enclosures.

P08006, however, developed a portable motion tracking system for Nazareth. Upon inspection of P08006's enclosures, it appears that they are simple plastic housings dremmeled or cut to fit P08006's components. P08006's cases are significantly bulky, and would definitely be unsatisfactory for a lumbar application.

P08006 published a document titled "Attachment Methods," which states that the model number for their enclosures was "ABS UL 94 HB, M3 Screws" A picture of the enclosure is shown below:


Step 4. Explore Systematically

Specifications of Interest:

  1. Sensor Width/Length (desired 1x1)
  2. Sensor Thickness (desired 1/2)
  3. Sensor Weight
  4. Diameter of Wires
  5. Microcontroller Dimensions
  6. Microcontroller Weight

Step 5. Reflect on the Results and the Process

Generate Product Concepts