Difference between revisions of "S17: Smart Health Gear"

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[[File:CmpE244_S17_T5_systemOverview.JPG|500px|thumb|center|System block diagram]]
 
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===== Heart Rate Sensor =====
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==== Heart Rate Sensor ====
  
 
==== Temperature Sensor ====
 
==== Temperature Sensor ====

Revision as of 09:19, 21 May 2017

Grading Criteria

  • How well is Software & Hardware Design described?
  • How well can this report be used to reproduce this project?
  • Code Quality
  • Overall Report Quality:
    • Software Block Diagrams
    • Hardware Block Diagrams
      Schematic Quality
    • Quality of technical challenges and solutions adopted.

Project Title

Smart Health Gear

Abstract

Smart Health Gear is a wearable device which will help in monitoring various aspects of a person's health like heart rate, foot steps count and body temperature. It will come with a compatible android application which will notify the user on completion of daily activities and log all the data from the Smart Health Gear to provide a history chart.

Objectives & Introduction

Show list of your objectives. This section includes the high level details of your project. You can write about the various sensors or peripherals you used to get your project completed.

Team Members & Responsibilities

  • Aniket Dali
  • Jean Mary
  • Manoj Ramesh Rao
  • Neha Biradar
  • Sushma Macha

Schedule

Show a simple table or figures that show your scheduled as planned before you started working on the project. Then in another table column, write down the actual schedule so that readers can see the planned vs. actual goals. The point of the schedule is for readers to assess how to pace themselves if they are doing a similar project.

Week# Date Task Comments
1 3/2 Submission of Project Proposals Completed
2 3/15 Gathering requirements Completed
3 3/30 Finalizing and documenting project requirements Completed
4 4/5 Initiate research on components and start research/development on algorithms to read sensor values. In progress
5 4/8 Initiate development of sensor and IO modules in software. In progress
6 4/16 Finish component procurement and start PCB design. Start research on strategies for unit and integration testing. In progress
7 4/18 Designing code architecture and interfaces. Prepare test plan to unit test sensor and IO modules.
8 4/23 Finish unit test plan. Finish PCB design and Place and order for PCB fabrication .
9 4/24 Finish and document code architecture and initialize interfaces provided to RTOS application. Initiate designing of Android application.
10 4/25 Development of RTOS application to control sensor and IO modules.
11 4/27 Unit testing of sensor and IO modules and updating results. Initiate preparation of integration test plan.
12 4/30 Bug fixing and re-testing. Initiate Unit testing of RTOS application.
13 5/2 Bug fixing and re-testing for unit test phase.
14 5/4 Integration testing of sensor modules and RTOS application and update results.
15 5/8 Bug fixing and re-testing. Initiate PCB testing.
16 5/12 Bugs fixing and re-testing for integration and PCB.
17 5/14 Start System testing.
18 5/16 Bug fixing and re-testing.Initiate documentation of project report.
19 5/19 Bug fixing and re-testing.Finish project documentation.
20 5/20 Prepare release note. Ready for demo.
21 5/21-5/22 Buffer.
22 5/23 Demo.

Parts List & Cost

Item# Part Manufacturer Part number Cost($)
1 SJ One Board Preet n/a 80.00
2 Heart-Rate Monitor and Pulse Oximeter Sensor Maxim MAXREFDES117 20.00
3 HC-06 wireless bluetooth transceiver Banggood Datasheet 6.55
4 10K Precision Epoxy Thermistor - 3950 NTC Adafruit Lookup Table 4.00
5 LCD module Aliexpress SEN-10988 32.30
6 Hardware Excess Solution Berg strips, Jumper wires, Connectors, Standoffs 5.00
7 9V Battery Amazon 32.30
  • Total Cost: 153.79$

Design & Implementation

The design section can go over your hardware and software design. Organize this section using sub-sections that go over your design and implementation.

Printed Circuit Board

The PCB design was one of the challenging part of this project. The PCB design was created in Autodesk Eagle v8.1.0. Before proceeding with the schematic, we had decided to design a PCB that matches with the size of the SJ one board such that it could be mounted over it. Considering designing a wearable device, we had to keep in mind the form factor of the PCB. Initially we designed a PCB which turned out to be four-layer PCB including the blood pressure monitoring subsystem. However due to budget constraints we had to give up the blood pressure system as printing the same required a licensed version of Eagle.

Before starting the PCB schematic design, we decided on the location of sensors as it was vital for a wearable health monitoring device with a LCD display facing the user. Since surface mount soldering was not an option we decided to design the schematic with through hole connections. Another challenging part for our design was the libraries needed for schematic design. Since we didn’t have libraries for heart rate sensors, we had to design by creating it from scratch. However, we had some libraries from sparkfun, Eagle and Adafruit, the entire process took most of our time.

The first step in PCB design is to import all the libraries of the components that we would be using and create a schematic using the same. We made use of the Dimension tool in Eagle to match the PCB size with that of the SJ one board. We created the schematic by placing the required components and wiring them. The tutorial on Sparkfun website was very helpful in designing the same. It was very important for to ensure that all connections are verified properly before it gets printed. This was done using “DRC” Design Rule Check in Eagle which would show if any consistent errors existed.

EAGLE Schematic

PCB schematic

EAGLE Connector List

Section Connector Library Package Device
Power Connector 2x2-pin SparkFun-Connectors SCREWTERMINAL-3.5MM-2 CONN_023.5MM (CONN_02)
SJ-One Board 2x17-pin SparkFun-Connectors 1X17 CONN_17
Bluetooth Module 1x6-pin SparkFun-Connectors 1X06 CONN_06SILK_FEMALE_PTH (CONN_06)
Temperature Sensor 1x5-pin SparkFun-Connectors 1X05 CONN_05
Heart Rate Sensor 1x5-pin SparkFun-Connectors 1X05 CONN_05
LCD Section 1x9-pin SparkFun-Connectors 1X09 CONN_09
Resistor 5x2-pin resistor 0207/7 R-US_0207/7 (R-US_)
Capacitor 2x2-pin rcl C025-050X050 C-US025-050X050 (C-US)
Switch 2x4-pin SparkFun-Switches TACTILE_SWITCH_PTH_6.0MM MOMENTARY-SWITCH-SPST-PTH-6.0MM (MOMENTARY-SWITCH-SPST)
LM7805 Regulator IC 1x3-pin v-reg 78LXX 78LXX

Once the schematic is created that can be easily converted to Board Layout using the Generate/Switch to board option in Eagle. But this would create the board by randomly placing the parts at different locations. Since we had to have an LCD mount over the PCB as well as match the 17x2 connectors with that of SJ one board we created the design accordingly. After ensuring that everything was in place we placed order for the PCB and verified the same again using a multi-meter if all the connections were correct.

PCB board layout

Hardware Design

Discuss your hardware design here. Show detailed schematics, and the interface here.

System block diagram

Heart Rate Sensor

Temperature Sensor

LCD

Bluetooth Module

Software Design

Show your software design. For example, if you are designing an MP3 Player, show the tasks that you are using, and what they are doing at a high level. Do not show the details of the code. For example, do not show exact code, but you may show psuedocode and fragments of code. Keep in mind that you are showing DESIGN of your software, not the inner workings of it.

Implementation

This section includes implementation, but again, not the details, just the high level. For example, you can list the steps it takes to communicate over a sensor, or the steps needed to write a page of memory onto SPI Flash. You can include sub-sections for each of your component implementation.

Testing & Technical Challenges

Describe the challenges of your project. What advise would you give yourself or someone else if your project can be started from scratch again? Make a smooth transition to testing section and described what it took to test your project.

Include sub-sections that list out a problem and solution, such as:

My Issue #1

Discuss the issue and resolution.

Conclusion

Conclude your project here. You can recap your testing and problems. You should address the "so what" part here to indicate what you ultimately learnt from this project. How has this project increased your knowledge?

Project Video

Upload a video of your project and post the link here.

Project Source Code

References

Acknowledgement

Any acknowledgement that you may wish to provide can be included here.

References Used

List any references used in project.

Appendix

You can list the references you used.