P17345: Deployable Noise Meter
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Detailed Design

Table of Contents

Team Vision for Detailed Design Phase

During the detailed design phase, we plan to continuing the development of the final concept selected. In order to have a complete design ready for next phase, the following will be accomplished: finalize the bill of materials, get details about convocation, feasibility testing, final circuit schematic will be created and priced, and other key components will be selected based on earlier feasibility results. All other MSD tasks will be reviewed and edited based on the development of the product.

Accomplishments:

Design and Flowcharts

Concept

The final design concept is shown below. The concept has five microphones hanging from the ceiling and one camera directed to the NTID section. The sound from each college would be captured in the mics and would be processed using an analog to digital converter. Then the processed data would be used to generate a sound map increasing color intensity as louder the crowd becomes. For the NTID section the same thing would be done but using a camera and graphic transforms to get a value.

Flow Charts

Updated general flow of device

Updated flow of information

Customer & Engineering Requirements

A live document can be found here: Customer & Engineering Requirements

Customer Requirements

Engineering Requirements

Bill of Materials

Note: The items in yellow are may or may not be needed depending on the out come of meetings during the first week of MSDII. It has not been added to the subtotal.

Drawings, Schematics

Field House Seating

Below shows the seating for colleges that has been used for past a few years.

Audio

Circuit Schematic

Printed Circuit Board (PCB)

Below is a 3-D rending of the finished board

Below is a detailed layout and size of the board

Below shows all the traces(connections) on the top of the board

Below shows all the traces(connections) on the bottom of the board

Visual

For the visual measurement there will be webcam that fixed to the rafters of the field house and pointed down. This will be attached to a raspberry pi which will have the program to analyze the movement below. This will then be connected by Ethernet to a computer to display the results.

Prototyping, Engineering Analysis, Simulation

The purpose of these tests, is to determine the feasibility of using the Fourier Transform to determine the amount of motion. More tests were also conducted to determine the best angle of video recording in order to receive the best results. Additional feasibility testing was conducted in order to determine what resolution and frames per second (fps) the camera must have in order to achieve reasonably accurate results within the customer requirements.

A detailed write up for the visual testing can be found here: Video Testing PDF

Test Plans

Audio Subsystem Testing

Test 1: Mic and amplifier/filter circuit

For each mic subsystem:

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Test 2: ADC

For each ADC:

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Test 3: Microcontroller for ADC

For each Microcontroller:

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Test 4: Entire Audio Subsystem

For each microphone subsystem:

Video Subsystem Testing

Test 1: Webcam

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Test 2: Single board computer (SBC)

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Test 3: Webcam subsystem

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Test 4: Video subsystem

Final Configuration Test

Risk Assessment

A live document can be found here: Risk Assessment

Design Review Materials

A link to the to the Preliminary Detailed Design presentation can be found here:Detalied Design Review PDF

Plans for next phase


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