1 / 20

EE 296 Icarus Project Group Members: JimyLeah Castro Jeremy Chan Eric Lee Sae Yoon

EE 296 Icarus Project Group Members: JimyLeah Castro Jeremy Chan Eric Lee Sae Yoon. Project Overview. Use a Zilog Microcontroller to handle telemetry Multiplex several sensor readings via communications channel Transmit data wirelessly. Overview of Initial Engineering Objectives.

akahn
Download Presentation

EE 296 Icarus Project Group Members: JimyLeah Castro Jeremy Chan Eric Lee Sae Yoon

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. EE 296 Icarus Project Group Members: JimyLeah Castro Jeremy Chan Eric Lee Sae Yoon

  2. Project Overview • Use a Zilog Microcontroller to handle telemetry • Multiplex several sensor readings via communications channel • Transmit data wirelessly

  3. Overview of Initial Engineering Objectives • Interface with sensors • Utilize a radio system • Design a portable device • Create a custom printed circuit board • Apply theoretical concepts

  4. Overall DesignBlock Diagram

  5. Design Structure – Circuit Schematic Battery Feedback Circuit Power Supply Circuit MAXStream9 RF Modem GPS Module Zilog Encore Microcontroller Crystal Oscillator Circuit Temperature Sensor Debug/Programming Port Motorola Pressure Sensor and Attenuator Circuit

  6. Design Structure – Circuit Schematic

  7. Design StructureCircuit Modules • Power Supply (5V, 3.3V) • Zilog 40 Pin 64KB Flash Microcontroller • MAXStream9 RF Modems • Microchip TC1074A Temperature Sensor • Lassen IQ+ GPS • MPX4115A Motorola Pressure Sensor • LM324 Operational Amplifier • Ultra Low Power Attenuator Circuits

  8. Initial Prototype

  9. Final Prototype

  10. Final Design Status

  11. Design Features • Bidirectional Communication – full duplex command and telemetry via wireless • Power Trim Mode – hibernate the radio in order to cut power consumption by 33% • Low Battery Detection and Response – automatic power trimming, warnings • Attenuator Circuits – to scale voltages with high accuracy and low power consumption

  12. Challenges Encountered • Programming Limitations • Proprietary Serial Protocol Implementation • High Power Consumption • Scheduling Conflicts • Vibrations Affect Pressure Readings

  13. Data via Telemetry

  14. Icarus Diamond Head Telemetry

  15. Data via TelemetryDiamond Head Hike, 12/26/2006

  16. Message Formats • Sensor Data • $DAT:76.1,F,24.5,C,100.421,kPa,8.29,V* • GPS Data (NEMA 0183 Standard) • $GPGGA,034944.00,2116.3475,N,15748.0174,W,1,03,2.38,00089,M,004,M,,*73 • System Status Messages • $STAT_BATT,7.33,V,LOW-BATT-TRIM-MODE-ACTIVATED* • $STAT_BATT,7.38,V,LOW-BATT* • NEMA style messages allow for easy reading and data filtering

  17. Outstanding Problems • SHT11 Scrapped • GPS: Unable to Acquire GPS Fix Reliably

  18. Future Improvements • On-board Data Logging via Flash Device • Additional Sensors • Implement remote control devices • Higher Resolution ADC for Pressure • Space Reduction • Power Optimization • Data Checksum Implementation

  19. Final Design Demonstration

  20. Thank You

More Related