P13625: Air Quality Monitor
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Systems Design

Table of Contents

Project Background

The goal of this project is to redesign and improve the existing air quality monitor currently in use by Dr. James Myers who is using this device to conduct research in developing countries. The device is used to collect quantifiable data on particulate matter from home environments, which include cooking and heating fires. The biomaterials currently being used as fuel for fires in developing countries contains materials ranging from construction debris and excrement to conventional heating materials. The current device being used only measures particulate matter and temperature, and there are issues with the sensors’ durability and cost.

Problem Statement

The primary objective of this project is to improve data collection while simultaneously lowering cost and improving robustness in an effort to make research easier and more cost effective for Dr. Myers and other researchers. In order to facilitate this, a longer battery life and individual gas sensors are being explored for use.

Objectives/Scope

Assumptions & Constraints

Customer Needs

Customer Needs

Customer Needs

Functional Decomposition

Functional Decomposition

Functional Decomposition

Specifications

Specification Table

House of Quality

House of Quality

Concept Development (generation, improvement, selection)

Pugh for CO

Pugh for CO


Pugh for NO2

Pugh for NO2


Pugh for PM

Pugh for PM


Pugh for SO2

Pugh for SO2


Pugh for TH

Pugh for TH


Sensor Types Selected Sensors Cost Information
CO MQ-7 Gas Sensor (C9O) $7.25 Link
PM PPD42NS $15.50 Link
Temp&Humid SHT15 $28.95 Link
RealTime Clock RV2123C2 $9.00 Link
NO2 e2v $95.16 Link

Additional Information
Pugh System
Microcontroller family chosen msp430 Link

Systems Architecture




System Architecture

System Architecture




Micro UML Activity Diagram

Micro UML Activity Diagram




Mobile Data Visualizer

Mobile Data Visualizer




Risk Assessment

Risk Assessment

Work Breakdown Structure

Work Breakdown Structure

Questions

Mechanical:



Electrical:

Computing:



Chemical:

Action Items

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