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Detailed Design

Table of Contents 1 Team Vision for Detailed Design Phase 2 Test Plans 3 Test Results 3.1 Radar Test Results 3.2 Radio Comms Testing 4 Analysis 5 Bill of Material (BOM) 6 Risk Assessment 6.1 Active Risks 6.2 Inactive Risks 7 Design Review Materials 8 Plans for next phase 9 Individual Plans

Team Vision for Detailed Design Phase

During this phase, we planned to get the radar working and talking to the pi, as well as testing how far the radio transmitter/receiver circuit can reach with an antenna, and how sensitive the radar is to objects of different sizes. We also planned on creating housing for the radar, base station, and in-car device, as well as testing the housings in different weather conditions.

We did not get to creating housings yet, as we decided this should be a last step so we know exactly how big the housings should be for each unit. We were, however, able to get the radar working and talking to the pi, as well as complete the testing we wanted to complete.

In the next phase, we plan on integrating the speaker into the in-car device, as well as finalizing the software that will link the radar detection to the radio signal transmission. After this, we will be able to create the housings and do extensive testing, adjusting as needed to test results.

Test Plans

Test Results

Radar Test Results

• Detected Human within 25ft
• Radar requires object to be moving towards or away from it, can’t detect side to side motion

Radio Comms Testing

With no antennae:

• Signal reaches a few inches from transmitter

With 14” antenna on transmitter:

• Signal reaches 150+ ft
  • Through glass window
  • Through wooden door
  • Through concrete pole
  • Through humans

Analysis

• Updated Base station to Sensor Calculations to minimize unsynchronized signals risk:

• Measurement distances from Google Earth:

• Calculation Results:

• Updated System Diagram with tested and more accurate calculated ranges:

Bill of Material (BOM)

Link to Google Sheet: https://docs.google.com/spreadsheets/d/1qnMJ9c0mfS50-WuRnCa5gctTIUNqkqNuf9aMXx3jhh8/edit#gid=0

Risk Assessment

Active Risks

Inactive Risks

Link to Risks: https://docs.google.com/spreadsheets/d/1vhE9Qaz9nc1MCtuuAWnUZMl5TOMzVW3vgzW1d7mleWU/edit#gid=2088209458

Design Review Materials

Our Detailed Design Review presentation was given on April 23, 2019.

Plans for next phase

In the next phase, we plan on integrating the speaker into the in-car device, as well as finalizing the software that will link the radar detection to the radio signal transmission. After this, we will be able to create the housings and do extensive testing, adjusting as needed to test results.

https://app.teamweek.com/#timeline/417877/groups/382514?zoom=month Link To Teamweek

Individual Plans

Member	Link to plan
Patrick Landers	Link to document
Vu Le	Link to document
Danielle Fischer	Link to document
Ricky Witherspoon	Link to document

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