Biomedical Device (BMD)

Request for Proposal: Biomedical Device

Note: You should only use the materials contained in the Price List for BMD projects. If you want to use other parts, get permission from your faculty member to do so, and also to determine the cost of the parts you want to use that are not in the Price List.

Introduction and Overview

Biomedical engineering is an incredibly multidisciplinary STEM field that almost any engineering and computer science student can enter into. It is the application of biology and engineering to design new and innovative devices to improve healthcare and medical options. Some of the most well-known biomedical devices include artificial organs, prosthetics, wearables, and surgical robots.

Biomedical devices have already saved and improved the lives of countless people. Your goal will be to develop one of these devices. Your group is tasked with developing either a prosthetic or a wearable device that can improve the quality of life of the user. The prosthetic or wearable that you will develop will need to meet some basic requirements to be considered a working prototype.

Specifications

Your team must build a model of your design using the materials provided. In doing so, you must implement a machining method in manufacturing the model. An Arduino program that will direct the devices, sensors, and/or movements must be created. A cost estimate of the components of the device must be provided. All revisions to the original design must be recorded and explained. This includes technical design drawings, as well as cost estimates. All revisions to the Arduino program must be recorded and explained.

The biomedical device must be able to complete a predetermined series of tasks in a consistent and effective manner and complete one of the Extra Tasks available. The biomedical device options can be selected from the Device Choices list below.

The device's program may not be altered or switched during any part of its use when Benchmarking and Commissioning. The device must be fully autonomous, and cannot be altered or adjusted during testing. Please refer to the course syllabus for all due dates.

Device Choices

You must choose an option for your project out of the two given below:

• Prosthetic Option: Develop an artificial limb, a piece of technology that can be worn and can effectively replace a lost body part, that fits under one of the following categories.
  • A prosthetic that simulates a hand which is capable of wrapping around a shopping bag handle and lifting a 1 pound weight.
  • A prosthetic arm that includes an elbow which can move vertically at least 90 degrees, and a feature simulating a wrist which can rotate at least 180 degrees. This arm must include a hand-like feature that does not need to be functional.

• Wearable Option: Develop a wearable device, a piece of technology that can be worn on the human body and provide valuable health or fitness information to the wearer. This is often assistive technology that fits under one of the following categories.
  • A wearable device that can measure light intensity and inform you of how long you can be exposed to that light intensity before it becomes harmful.
  • A wearable device that monitors your heart rate and warns you when your heart rate becomes irregular.

Extra Tasks

One of these tasks must be completed to complete the project, but all others can be done for extra credit. You have the freedom to decide which of these tasks you would like to complete.

• Using more than one sensor
  • Each sensor must be implemented so that there is a measurable increase in the quality of the device
• Incorporating a display/touchscreen
• Developing a website or smartphone application
• Implement at least one additional machining method (3D printing, laser cutting, woodworking, etc.)
• Choose your own: This is approved on a case-by-case basis. You must meet with a RAD Open Lab (RAD OL) TA and the RAD OL will submit the extra credit idea for approval

Machining Methods

These are the machining methods that will count toward Benchmarking, Commissioning, and Extra Credit. Currently, EG1003 only offers 3D printing, while most other machining methods must be completed through the MakerSpace. For the MakerSpace machines, you must complete the MakerSpace Safety Orientation and sign-up for a training session to use these machines (MakerSpace training times can be viewed here). Some of these machining methods require extra materials that not all groups have access to.

• 3D printing (available through EG1003, more filament types and build plate dimensions available through the MakerSpace)
• Laser cutting (wood or acrylic)
• Woodwork (hand and power saws available in the MakerSpace)
• Mold casting (counts as two types if you manufacture the mold)
• Composite materials (carbon fiber, glass fiber, or silicone casting)
• CNC milling (available in the MakerSpace)

Microsoft Project

A project schedule must be created in Microsoft Project. Learn to use Microsoft Project by accessing the Microsoft Project Student Guide. This schedule must include all tasks related to the project from the start of the project to Early or Final submission. Click here to access the guide on how to transfer a file. The Microsoft Project schedule should include:

• Minimum of 20 tasks, excluding Milestones
• Milestones should be clearly indicated on the project plan (duration of zero days)
• Each task must include the person responsible for completing the task (resource names)
• Use the "Copy Picture" function to include the schedule in the presentations. Do not take a screenshot
• Gantt chart must be displayed alongside the tasks list (fit onto one slide)
• Gantt chart must show a progress line
• Clearly state during the presentations whether the project is on-time, behind schedule, or ahead of schedule

For help planning the project, review the manual page Planning Project Scheduling & Costs.

Model

You must build a scale model (1:1) of your design. The following materials will be provided in your kit or are available upon request. Some materials are in limited supply, so teams will be restricted in the quantity they can use, as indicated by the number in the parentheses next to the item name:

• Arduino board
• Temperature sensor
• Light sensor
• Pressure sensor (1)
• Muscle sensor (1)
• Ultrasonic sensor
• Mini servo motors (8)
• Small display (1)
• Pulse sensor (1)
• Bluetooth module (1)

The following miscellaneous materials are also available upon request:

• Buttons
• LEDs
• Wires
• Tape
• Glue
  • Superglue
  • Hot glue
• String
• $1ft^{2}$ acrylic (1)
• Wood (4)
• Breadboard
• Prototyping board
• Velcro
• Fabric
• Batteries

Drawings

You will be required to draw a CAD model of your device for Milestone presentations and Benchmark assessments. You can use any CAD software to do so. EG1003 uses and teaches Fusion 360 for labs and other SLDPs, and Fusion 360 is the recommended software for CAD. You can download Fusion 360 for free using your NYU email. Other CAD software such as SolidWorks, Inventor, and Rhino are permitted, however EG1003 does not provide resources in obtaining or learning those programs.

Using your chosen CAD software, create four drawings of the device: front, top, most detailed side, and isometric. Sensors and motors must be included in each drawing.

Each revision of the design must be documented and all changes must be presented during Milestone presentations.

Figure 1: Example of a BMD Drawing

Cost Estimate

A cost estimate must be generated that specifies the cost of each component and labor required for the construction of the design. Tabulate this cost information clearly in an Excel spreadsheet, using the materials cost list provided. The costs for the parts can be found in the Price List below. Help in calculating the cost is available by reviewing how to plan the schedule and calculate costs for a project.

Create a cost estimate on a Microsoft Excel spreadsheet. The cost estimate should abide by the following specifications:

• Labor cost breakdown with hours and rates
• Consolidate low-cost pieces: wires, tape, servo motors
• Itemize high-cost pieces: Arduino board, sensors, 3D printing filament, acrylic, wood
• Total cost must be clearly shown in the bottom right corner

Price List

Item Name	Price Per Unit
Temperature Sensor	$1.80
Pressure Sensor	$9.01
Muscle Sensor	$37.99
Muscle Sensor Electrodes	$0.50
Ultrasonic Sensor	$2.80
Pulse Sensor	$24.99
Mini Servo Motor	$1.76
Accelerometer	$4.99
Bluetooth Module	$7.99
Breadboard	$2.00
Prototyping Board	$1.00
Button	$0.10
LED	$0.10
Wire	$0.05
Tape	$0.10/ft
Glue Stick	$1.00
Superglue	$1.00/tube
String	$1.00/ft
Acrylic	$20.00/sqft
1/4" Plywood	$5.00/sqft
Velcro	$5.00/4 in
Fabric	$5.00/sqft

Extra Credit

BMD groups can be awarded extra credit by completing additional Extra Tasks on top of the one required for Commissioning. You can also receive extra credit for completing Benchmark A, Benchmark B, or Submission early, or completing your respective SLDP's 3D printing extra credit task as described in the Prototyping Guide. Refer to the EG1003 Grading Policy for exact point values.

Milestones, Benchmarks, and Deliverables

As work is done on the project, three Milestone presentations will report on the project's progress. All of the items assigned in each phase of the project are called Benchmark deliverables. These deliverables often consist of a combination of written submissions, presentations, and demonstrations. Benchmark assessments evaluate the progress of the project.

Preliminary Design Investigation

The Preliminary Design Investigation (PDI) is extremely important, as it lays the groundwork for the project. It outlines the project idea, inspiration, and goals.

The PDI must include:

• Cover Page
• Project Overview
• Goals & Objectives
• Design & Approach
• Cost Estimate
• Project Schedule
• Relevant Pictures

An example PDI template can be found here. The PDI is due by Benchmark A. Do not forget to include the items listed above. Use this link to access the VEX PDI Rubric.

Milestone 1

See How to Give a Milestone Presentation for the format of a Milestone presentation.

Milestone 1 should act as a presentation of your Preliminary Design Investigation. Without simply replicating your report in presentation format, take the key points to present in a concise and clear manner. The section formatting should be similar to that of the report. It is important that you outline your project goals and show that your project is realizable. This includes:

Milestone 1 Deliverables:

• Presentation:
  • Project description
  • Design approach
  • Mission statement
  • Preliminary CAD drawing of device
  • Cost estimate
  • Microsoft Project schedule
    • Click here to access the guide on how to transfer a file
  • Progress update: current state of the project

You must decide your project goal from the Device Choices list for Milestone 1. You cannot change device choices after this deadline.

Look Ahead: What tasks are planned between now and Milestone 2?

Benchmark Assessment A

Benchmarks evaluate the progress of the project. Benchmark A is due at the end of Model Shop Session II. There are penalties for not completing this on time. Refer to the EG1004 Grading Policy for more information.

To pass Benchmark A, the design must complete all of the following:

• Decide your project goal from the Device Choices list
• Develop initial CAD model
  • This is your first design/concept for what your device hardware will look like
  • Simple shapes and boxes do not count as an initial design
• One working sensor with wiring completed & Arduino code completed
  • The Arduino code can display data with proper units
  • Your sensor will depend on which device you choose from the Device Choices list

Milestone 2

See How to Give a Milestone Presentation for the format of a Milestone presentation.

Milestone 2 will be a project progress update. You must explain all changes and developments made thus far, particularly in regards to Benchmark A. Include whether or not you were able to complete your Benchmark A requirements, and if not, explain why. Also, highlight any changes you plan on making to your design or project, in general. Your Milestone 2 presentation must include:

Milestone 2 Deliverables:

• Project description
• Design changes since Milestone 1
• Design approach
• Mission statement
• CAD drawings: top, front, most detailed side, isometric
• Circuit diagram
• Flowchart of code
• Cost estimate (previous and current). What changes were made?
• Microsoft Project schedule (previous and current). What changes were made?
  • Click here to access the guide on how to transfer a file
• Progress update: current state of the project (time, budget, etc.)

Look Ahead: What tasks are planned between now and Milestone 3?

Benchmark Assessment B

Benchmark Assessment B is due at the end of Model Shop Session III. There are penalties for not completing this on time. Refer to the EG1004 Grading Policy for more information.

To pass, complete all of the following tasks:

• Updated CAD model
  • You must show the differences between your initial design and your new design
• Use one of the accepted Machining Methods to manufacture the frame/body of your device
  • The device does not need to be assembled but the individual pieces must be manufactured
  • For example, you have laser cut all the individual pieces but have not glued them together, or 3D printed a claw and arm for your prosthetic but have nothing attached yet
• Solder one of your sensors to a prototyping board

Milestone 3

See How To Give a Milestone Presentation for the format of a Milestone presentation.

Milestone 3 Deliverables:

• Presentation:
  • Project description
  • Design approach
  • Design changes since Milestone 2
  • Mission statement
  • CAD drawings: top, front, most detailed side, isometric
  • Arduino program
  • Cost estimate (previous and current). What changes were made?
  • Microsoft Project schedule (previous and current). What changes were made?
  • Progress update: current state of the project (time, budget, etc.)

Look ahead: What tasks are planned between now and the completion of the project?

Commissioning

Projects must be commissioned before Submission. Refer to the syllabus for Submission deadlines. There are penalties for not completing this on time. Refer to the EG1004 Grading Policy for more information.

To pass, the design must complete all of the following:

• Sensors must be fully incorporated into the design
  • All sensors work with one program and there is a battery with sufficient power connected
• Device can complete the tasks listed in the Device Choices list
• One Extra Task completed

Final Presentation

The Final Presentation will be a technical briefing, similar to the Milestones, but also serves as a sales presentation explaining why your company should be selected instead of the competition.

Your Final Presentation must include:

• Company profile
  • Company name
  • Employee profile, role(s), and qualifications
  • Mission statement
• Problem statement
  • Why is the project happening?
  • What does the audience need to know?
• Project objective
  • What is the purpose of your project?
  • Who does your project help?
  • What problem does your project solve?
• Project description
  • Specify LEED certification
    • Examples of LEED implementations in Revit
  • Revit drawings
    • All floor plan drawings
    • Dimensions
    • 1:240 scale
  • Views of exterior of building: front elevation, side elevation, isometric elevation
    • Dimensions
• Market and product viability
  • Does your company have competitors?
  • What makes your project unique?
  • How does your design compare to competitors - cost, quality, features?
  • Is the project versatile?
  • What is the price of your project?
• Conclusion
  • Reiterating project purpose
  • Highlight project features
  • Future goals of the company
  • Why should your company be awarded this contract?
• Video pitch
  • Price of project
  • Walkthrough animation of building in Revit
  • Embedded into Final Presentation
• Problem statement
• Solution overview
• Company description and qualifications
• Drawings
• Arduino program
• Cost estimate
• Microsoft Project schedule
• Video demonstration
• Why should the company be awarded this contract?

Submission

All SLDPs must be submitted online. Please visit this page for the link to the Project Submission form and each project’s individualized login information. To submit, login to the EG1004 website using this special login information. Submitting with an NYU account or any other account will generate an error. Components may be resubmitted at any time before the deadline. Please note that submission times are based on the most recent submission.

Please note the deliverables for this project are as follows. If any of the following items are omitted, there will be a penalty. Be sure to click "Submit" at the bottom of the form and allow sufficient time for uploading. The following list includes deliverable items that are required:

• Submission deliverables:
  • Final presentation
  • Final Arduino program
  • Initial sketch
  • All the drawings of your design (initial through final)
  • Video
    • The video must show your device completing all Commissioning requirements and Extra Tasks
  • Final Microsoft Project schedule
  • Final cost estimate
  • Resume(s) (no fictitious resumes will be accepted)

Late Submission

Late submission is not allowed. If a project does not Commission or receive Partial Commission by the deadline set forth in the syllabus, the project will not be allowed to submit and will receive a 0 for the project grade. To receive Partial Commissioning, two TAs must evaluate the project and determine its degree of completion according to the Commissioning requirements and the project will be given a grade accordingly. Please refer to the EG1004 Grading Policy for more information.

Frequently Asked Questions

Q: Are BMD groups allowed to make purchases?

A: No. BMD Groups are limited to the resources provided by the General Engineering Department. Please refer to the Model section of this page, or speak to a Technical OL to check if a specific material is available.

Q: Can our project be a biomedical device that isn't listed in the Device Choices?

A: No. If your group would like to do a different type of biomedical device, please speak to your Recitation TA and Professor about doing a RAD project instead.