Week 4: Finished Product Assembly and Final Testing



Smart Obstacle Avoidance Helmet - Week 4: Finished Product Assembly and Final TestingFinal Assembly and Hardware Integration

This week marked a crucial milestone as we finalized the hardware integration and assembly of the Smart Obstacle Avoidance Helmet. After multiple 3D printing failures, we opted for external processing services to ensure a high-quality print with improved material durability.

3D Printed Model Assembly

We received the externally printed helmet components and confirmed their structural integrity. The headgear frame was carefully assembled to ensure



secure positioning for the ToF sensors.

Additionally, we finalized the outer shell design, focusing on a sleek, lightweight, and robust structure that enhances both functionality and comfort.


Final Product Showcase

Below is the final assembled version of our Smart Obstacle Avoidance Helmet:

[Final Product]

Component Installation and Wiring

To complete the assembly, we:
Mounted the STM32 microcontroller and buzzer and finalizing wiring.
Addressed cable management by using soldering, hot glue, and electrical tape to ensure stable and interference-free connections.

Software Debugging and Optimization

With the hardware assembled, we shifted focus to software stability and refining component interaction.

Multi-ToF Sensor Data Handling

· Configured an additional STM32 unit (STM32#2) to handle ToF#4, solving the clock shortage issue.
Rewrote I2C handling functions to synchronize multiple sensors, preventing conflicts and improving measurement reliability.
· Implemented parallel processing to ensure real-time distance detection.

Buzzer and Voice Module Integration

· Debugged buzzer frequency mapping to align with obstacle distances.
· Attempted to integrate the voice module, but due to lacking components, it was not successfully assembled.
· Evaluated alternative solutions for auditory feedback.
· Fine-tuned logic triggers to ensure the buzzer activates correctly in different scenarios.


Testing and Evaluation

With hardware and software integrated, we began field and simulation tests to evaluate the helmet’s performance.



Indoor and Outdoor Field Testing

· Conducted indoor and outdoor tests to assess sensor performance.
· Identified helmet stability issues, as users reported difficulty securing the helmet, leading to slippage.
· Collected feedback on helmet fit and stability, confirming the need for an improved securing mechanism.

Bench Simulation Preparation

· Prepared test setups for system calibration and stability verification.
· Reviewed sensor accuracy and debugging logs to ensure data consistency before full-scale testing.


Conclusion and Next Steps

This week successfully integrated hardware and software, resulting in a functional prototype. Moving forward, our key areas for improvement include:

· Adding adjustable head straps to improve helmet stability.
· Exploring Bluetooth connectivity for real-time mobile feedback.
· Implementing AI-based obstacle classification to enhance detection accuracy.
· Potential voice-based guidance for future versions.

With these refinements planned, our next focus will be on enhancing stability, final testing, and preparing for real-world deployment. 

Stay tuned for our upcoming updates as we refine the Smart Obstacle Avoidance Helmet for better real-world performance!



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