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Documents Project C.O.D.I. | Overview, Current Proof of Concept, and Next Steps
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  • Author Author: tariq.ahmad
  • Date Created: 18 May 2018 6:47 PM Date Created
  • Last Updated Last Updated: 23 Nov 2018 7:37 AM
  • Views 1233 views
  • Likes 11 likes
  • Comments 4 comments
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Project C.O.D.I. | Overview, Current Proof of Concept, and Next Steps

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What is Project C.O.D.I.?

 

The name Project C.O.D.I comes from an acronym for Computerized Obstacle Detection Interface and its named after a 9 year old boy named Cody.  It's an assistive piece of wearable technology that is adapted from Music: Not Impossible technology, and its built into a Superhero costume.  Cody's superhero costume will help him compensate a rare disease known as peroxisome biogenesis disorder, that will cause him to lose his sight and hearing, by allowing him to feel what his eyes can no longer see and his ears no longer hear.  Most people with P.B.D. are not expected to live past the age of 10.  At the age of 9, Cody appears to be a special case, his condition appears to be stable, although that can change at any time. PBD has already cost him his peripheral vision and he's on the verge of profound deafness.

 

Current Proof of Concept

 

The current proof of concept we are sharing is one of multiple implementations envisioned for project Cody.   There are many many individual pieces that will create a mesh network progressing upwards to a wearable set of gauntlets, ankle wraps and vest (a set of sensor nodes).   This will allow sensor streams from one node to inform the other, e.g., the signal from the left gauntlet could inform the right and vice versa.

 

The mesh would be able to do the following:

  • Minimize crosstalk between different nodes
  • Merge the streams of all of the nodes to expand the field of view (map of the world)
  • Predict in real-time how Cody will move through the mapped world and inform him accordingly

 

Wrist Wearable Proof of Concept

The current proof of concept we are sharing is one of multiple implementations envisioned for project Cody.   There are many many individual pieces that will create a mesh network progressing upwards to a wearable set of gauntlets, ankle wraps and vest (a set of sensor nodes).   This will allow sensor streams from one node to inform the other, e.g., the signal from the left gauntlet could inform the right and vice versa.

 

Figure 1:Figure 2:

image

image

 

The motor driver and the microcontroller (purple board, leftside center) connected to:

  • 2 ERM haptic motors (blue, above and below the purple board
  • a USRF and TOF (right, center, TOF is the rightmost board, USRF is adjacent)
  • an ambient light sensor on the backside of the wearable (red, blue & black braided wires)

 

Velcro straps allow the wearable to be easily applied.  The device is powered by a lipo battery (not shown).

 

The Backside of C.O.D.I Wrist Wearable Proof of Concept.

 

Visible above is the ambient light sensor which connects to the microcontroller on the palmside of the wearable

 

(red, blue, & black braided wires)

 

Figures 1 & 2 consist of a device that is mounted to a wrist guard.  The device uses both a time of flight sensor (TOF) and ultrasonic range finder (USRF) to measure the distances and then maps the distances to haptic vibrations.

 

The device has a narrow field of view allowing the wearer to move their hand, point the deviec, and feel the distance in the direction their hand is pointing.

 

Mapping is done using an inverse logarithmic function:

 

Figure 3:
image

Mapping of Distane to Vibration Strength.

 

Left: a remapping of the full sensor range to normalized motor output.

 

Distance is remapped using a decaying logarithmic function.

 

Right: A zoom of the first 50mm of sensing range.  While changes in vibration strength occur at a distance the majority of quantization is concentrated in the near field.

 

 

Next Steps

 

There are multiple implementations envisioned for Project C.O.D.I.

 

The C.O.D.I wearable system would consist of a set of gauntlets, ankle wraps, and vest (a set of sensor nodes).

 

 

 

Figure 4
image

Sketch of C.O.D.I. Wearables - The Body Layout

 

 

Wearables (shaded) displayed from posterior view (Left), anterior view (Center), left side view (Right).

 

 

Range sensors for vest can be seen in left and center views (yellow dots). For the wrist wearable, the approximate sensor emission location can be seen in the anterior view (darkened area).  This can also be seen in Figure 5.  For the wrist wearable it is important to shift the sensor as far back as possible in order to prevent interference from the fingers.  For the ankle wearable, the approximate sensor emission location can be seen in the anterior and left side views.  The approximate sensor spread pattern can be seen in the left side view.  The foot (pink), near (orange), & far (yellow) sensor fields for the ankle wearable are visible in the left side view.

 

 

 

 

 

Figure 5:Figure 6:
imageimage

Sketch of Wrist Wearable

 

The approximate sensor emission location for the wrist wearable can be seen in the center view (darkened area).

 

For the wrist wearable it is important to shift the sensor as far back as possible in order to prevent interference from the fingers.

Sketch of C.O.D.I. Ankle Wearable with Proposed Throw Patterns.

 

For the ankle wearable there are three distinct sensor fields of view. The first, the foot field, pink rays above, will be used to monitor the articulation of the foot with respect to the lower leg. The second, near field, the orange rays above, will project slightly in front of the foot and will be used to find the next stair/step. The third, far field, yellow rays above, will be used.

 

Feature List:

 

To fully enable the abilities described above in The Plan, the below feature will be needed.  Future features will likely improve accuracy robustness by including additional sensors and prior knowledge.

 

Minimum Requirements:

  • Durability
    • Dust resistance, Waterproof, Impact Resistance IP672 minimum
  • Power
    • Rechargeable power, 8hrs between charges
    • Wireless Qi charging
  • Usability
    • Nodes (gauntlets, ankle wraps, vest) can act independently but will automatically detect and partner with other nodes.
    • Work in a wide range of lighting from pitch black to studio lighting and daylight.
  • Sensors:
    • TOF
    • Ultrasonics
    • 9DOF / Accelerometer / Gyroscope / Magnetometer
      • Absolute orientation module e.g. BNO055
    • Ambient Light
    • Microphones
  • Haptics
    • LRA

 

Future features:

 

  • Sensors:
    • Temperature - Thermal Camera
    • GPS
  • Communication
    • Cellular
  • Integration
    • google maps/street view

 

Project C.O.D.I. |  Schematics, Arduino IDE Sketch, B.O.M, and Eagle Files!

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Top Comments

  • jw0752
    jw0752 over 7 years ago +3
    Hi Tariq, This looks like a great cause and company. I appreciate your blog to call it to our attention. John
  • tariq.ahmad
    tariq.ahmad over 7 years ago in reply to jw0752 +3
    Thanks John, I’m really looking forward to this and connecting what we have going here with the things they are doing is something that I’m excited to see play out. Its our hope that this leads to tangible…
  • 14rhb
    14rhb over 7 years ago +2
    What a terrible thing for anyone to suffer with, let alone someone so young - wishing him and Project Cody well. notimpossible please keep us informed on here as the E14 community is really knowledgable…
  • balearicdynamics
    balearicdynamics over 7 years ago

    Hi Traiq,

     

    it is a great project. I know it by some time but never known in dept. Do you think it has sense to move some proposal partnered by E14 together?

     

    Enrico

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  • tariq.ahmad
    tariq.ahmad over 7 years ago in reply to jw0752

    Thanks John,

     

    I’m really looking forward to this and connecting what we have going here with the things they are doing is something that I’m excited to see play out.

     

    Its our hope that this leads to tangible results and is something we can do more of moving forward.

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  • 14rhb
    14rhb over 7 years ago

    What a terrible thing for anyone to suffer with, let alone someone so young - wishing him and Project Cody well. notimpossible please keep us informed on here as the E14 community is really knowledgable.

     

    The design spec and concept is really good - have you considered using the CAN bus communications protocol as used in the automotive industry ? CAN only needs two wires for comms which could be conductive thread within the suit apart from they also need to be a twisted pair for noise immunity.

     

    Rod

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  • jw0752
    jw0752 over 7 years ago

    Hi Tariq,

    This looks like a great cause and company. I appreciate your blog to call it to our attention.

    John

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