DISSOLVED OXYGEN MONITOR TEAM MEMBERS: ANDREW BEOUGHER ANTHONY SWOPE HAO WANG I-CHUN CHAO BING BAI COLIN HICKS Senior Design Dec1211 Dec1211.

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Presentation transcript:

DISSOLVED OXYGEN MONITOR TEAM MEMBERS: ANDREW BEOUGHER ANTHONY SWOPE HAO WANG I-CHUN CHAO BING BAI COLIN HICKS Senior Design Dec1211 Dec1211

DISSOLVED OXYGEN MONITOR Measures the concentration of dissolved oxygen (DO). Applications Waste water treatment Marine ecologies Fermentation Dec1211

DESIGN OBJECTIVES Re-engineer current design by removing or changing existing components. Lowering power consumption Adjusting system timing of the sensor Dec1211

DESIGN REQUIREMENTS Functional Microcontroller shall determine the dissolved oxygen level over 1 second Local and remote control operation Long battery life during discontinuous operation 5 samples every 5 minutes Operating duration of at least 30 days Dec1211

DESIGN REQUIREMENTS Non-functional Water resistant monitor unit enclosure Water proof sensor probe Local multi-character LCD Handheld / Portable Dec1211

SYSTEM CURRENT DESIGN Dec1211

SYSTEM PROPOSED DESIGN #1 Dual Supply System Dec1211

SYSTEM PROPOSED DESIGN #2 Single Supply System Dec1211

HARDWARE PROPOSED COMPONENTS Microcontroller ATXMega128 LED Current Driver MAXIM - MAX3699 TI - TPS61042 Linear Devices - LT1932 DC-DC Converters ADP - ADP150/151 TI - TPS61006 MAXIM - MAX1763 Dec1211

HARDWARE LED CURRENT DRIVERS Why drive with current and not voltage? Dec1211

HARDWARE BATTERY CONFIGURATIONS 3 potential configurations Dec1211

SOFTWARE CURRENT SENSOR TIMING Dec1211

SOFTWARE PROPOSED SENSOR TIMING Dec1211

TESTING COMPONENTS Power System: Power efficiency Current output LED driver: Startup times PWM output Actual vs. computed current output Microcontroller: Power consumption of different modes Dec1211

TESTING SYSTEM Full System Test: Long term battery duration Dec1211

TESTING SYSTEM Dec1211

PROJECT CURRENT STATUS Evaluate system operation Update customer requirements Perform component testing Create preliminary circuit board revisions Dec1211

PROJECT FUTURE PLANS Finalize new circuit board revisions Assemble new circuit board Perform long term battery duration tests Perform application and calibration testing Test programming modifications Re-integrate wireless communications Dec1211

Questions? Dec1211