P16414: Toilet Use Sensor
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Integrated System Build & Test

Table of Contents

Team Vision for Integrated System Build & Test Phase

Test the motion and pressure sensors together inside the simulated pit based on S25 and S26 test plan.
Have a mock up for the pressure and motion sensor data to allow creation of the macro in phase 3.
Once testing on the mock pit has started, make any final adjustment for ease of testing.
Demonstrate placement pressure sensor inside Arborloo.
Work on waterproofing and reducing the size of the box.
Calculate and test the power consumption of the removed chip in mAh.
Calculate the power consumption for each individual sensor.
Determine the battery configuration necessary to run the system for 45 days.
Find and implement power saving code to reduce power even more.
Complete testing of the pressure and motion sensors based on all of the use cases in the simulated pit.
Determine the rate of false positives for each use case.
Have battery system fully functional and able to last 45 days based on hand calculations and testing.
Test temperature and soil moisture sensors to ensure they are fully functional.
Finish Excel Macro to display data easily.
Finish machining and mounting box based on phase 5 testing.
Purchase and implement waterproofing techniques to ensure the box is waterproof.
Finish testing of preferred pH sensor and determine a technique for the most accurate readings.
Purchase cups and rods for the pH sensor.
Fabricate/solder board if necessary.
Finalize budget for producing 100 systems, so Sarah can submit her grant.

Power Consumption

Power Consumption Calculations

Power Consumption Calculations

Our System Stayed Above 3.3V for 12.5 days.

Test Results

Test Setup
Setup of Grid Test with Cardboard Blinder

Setup of Grid Test with Cardboard Blinder

Setup of Grid Test with Box Cover in Place

Setup of Grid Test with Box Cover in Place

Results
Results from Initial Pit Test

Results from Initial Pit Test

Results from Pouring Heated Water in Simulated Pit

Results from Pouring Heated Water in Simulated Pit

Results from Dropping Heated Golf Balls with Cardboard Blinder in Place

Results from Dropping Heated Golf Balls with Cardboard Blinder in Place

Results from Dropping Heated Golf Balls with Box Cover in Place

Results from Dropping Heated Golf Balls with Box Cover in Place

Results from Dropping Heated Golf Balls with Aluminum Foil Covered Cardboard Blinder

Results from Dropping Heated Golf Balls with Aluminum Foil Covered Cardboard Blinder

The complete Excel file with all test result data can be found at the following link: Test Results

Pit Sketch

Sketch of Pit and Setup

Sketch of Pit and Setup

Engineering Requirements

CR ER# Importance Description Metric Direction/Range Target Marginal Comments Test Plans Concluded Condition
1.1, 2.5 S1 9 Percent of new users who detect system % Decrease 0 <5 None S1 Test Plan Not Complete
1.2 S2 9 Percent of grid electricity required (any point in system) % Decrease 0 <5 No grid electricity available S2 and S3 Test Plan Fulfilled
2.1, 3.1 S3 3 Time system can be used without interruption days Increase >90 >45 None S2 and S3 Test Plan Not Complete
2.1 S4 3 Number of data points can be collected by counter number Increase 9999 999 None S4 Test Plan Fulfilled
2.2 S5 9 Detects temperature with reasonable accuracy C Range +/- 1 +/- 3 None S5 and S6 Test Plan Not Complete
2.2 S6 3 Maximum temperature that can be monitored C Increase >80 >70 None S5 and S6 Test Plan Not Complete
2.3 S7 9 Accuracy of pH reading pH Increase +/-0.1 +/-0.5 None S7 and S8 Test Plan In Progress
2.4 S8 9 Range of pH reading pH Range 2-10 4-8 None S7 and S8 Test Plan Fufilled
2.4 S9 9 Accuracy of moisture reading % Range +/-0.01 +/-0.1 None S9 and S10 Test Plan Not Complete
2.4 S10 9 Range of moisture reading is 0-100% (relative) binary _ yes yes None S9 and S10 Test Plan Not Complete
2.5 S11 0 Accuracy of oxygen reading % Range +/-0.01 +/-0.1 Unfeasible n/a Unfulfilled
2.5 S12 0 Range of oxygen reading binary _ yes yes Unfeasible n/a Unfulfilled
2.2, 2.3, 2.4, 2.5 S13 3 Frequency of pit readings number/day Increase 24 6 None S13 Test Plan Fulfilled
3.2 S14 3 Number of times the system can be reused number Increase >100 >15 None S14 Test Plan Not Complete
3.3, 3.7 S15 1 Time it takes to set-up the system minutes Decrease <30 <60 None S15 Test Plan Not Complete
3.4 S16 1 Time it takes to tear down the system minutes Decrease <10 <20 None S16 Test Plan Not Complete
3.5 S17 3 Time it takes to record data minutes Decrease <10 <30 None S17 Test Plan Fufilled
3.5 S18 9 Cost of equipment to record data USD Decrease <20 <50 Not including laptop or phone n/a Not Complete
4.1, 4.3 S19 3 Cost of power system over 1 year USD Decrease <15 <100 Based off price of a pack of AA batteries n/a Not Complete
4.2 S20 9 Cost of total system USD Decrease <400 <1000 None n/a Not Complete
4.3 S21 3 Cost of consumable parts USD Decrease <15 <30 None n/a Not Complete
5.1 S22 9 Percent of parts exposed that are not weather resistant % Decrease 0 <10 Internal components do not need to be weather resistant S22 Test Plan Not Complete
5.2, 5.3 S23 3 Shortest lived part years Increase >3 >1 Fatigue calculation if mechanical part is used. Can be batteries S3 Test Plan Not Complete
5.3 S24 9 Percent of parts that are corrosion resistant exposed to pit % Increase 100 >90 None S4 Test Plan Not Complete
2.1 S25 9 Percentage of uses the system registers and counts % Increase 100 >90 None S25 and S26 Test Plan Not Complete
2.1 S26 9 Percentage of false positives the system counts % Decrease 0 <10 None S25 and S26 Test Plan Not Complete

Note: Requirement S20 is red due to misunderstanding about its meaning. The requirement will be modified after a discussion with the customer so that it can be fulfilled.

Labor Calculations

Labor Calculations

Labor Calculations

Risk and Problem Tracking

Problem Tracking Update

Problem Tracking Update

Plans for Next Phase

Individual Plans
Eren's Three Week Plan - Eren's Goals

Kendall's Three Week Plan - Kendall's Goals

Kiera's Three Week Plan - Kiera's Goals

Saul's Three Week Plan - Saul's Goals

Quinn's Three Week Plan - Quinn's Goals

Team Vision

Final Vision


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