Accomplishments
- System Integration: Completed integration of all major components, including pump, heaters, fan, sensors, and servos
- Verified basic operation of each subsystem
- Integrated Pi 5 and Pico code for synchronized control commands for SSR, fan, and pump through UART
- SSR Calibration: Used oscilloscope testing to characterize relationship between PWM duty cycle and power output
Using Oscilloscope to Measure Vrms of SSR Output to Resistors - Data Collection Pipeline: Completed logging of temperature, RPM, and power data from sensors and Pi 5 commands into InfluxDB
Grafana Dashboard of Temperature Readings - Started preliminary data collection using constant power hold tests (20-40W)
- Flow Calibration: Mapped duty cycle values to flow reduction rate %
- Used oscilloscope to debug flowmeter reading problems
Using Oscilloscope to Measure Flowmeter Output to RPi5 Input GPIO Signal
- Used oscilloscope to debug flowmeter reading problems
Significant Risks
- Limited Data Collection Time: With only a few weeks left in the semester, there is limited time to gather a large enough dataset for ML model training
- Risk mitigation: Run automated, continuous overnight tests and streamline test sequencing to maximize data volume
- Power Supply Limitations: Current power supply does not provide enough wattage for full-load operation
- Risk mitigation: Acquiring a second power supply with higher capacity to support higher power testing
Design Changes
- No major design changes this week
Schedule Changes
- Schedule adjusted to allow additional time for data collection
- Project remains on track, with initial data collection underway
