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صفحه اصلی
/
سی و دومین کنفرانس بین المللی مهندسی برق
Real-Time Stress Detection via Photoplethysmogram Signals: Implementation of a Combined Continuous Wavelet Transform and Convolutional Neural Network on Resource-Constrained Microcontrollers
نویسندگان :
Yasin Hasanpoor
1
Amin Rostami
2
Bahram Tarvirdizadeh
3
Khalil Alipour
4
Mohammad Ghamari
5
1- دانشگاه تهران
2- دانشگاه تهران
3- دانشگاه تهران
4- دانشگاه تهران
5- Kettering University
کلمات کلیدی :
Stress Detection،Photoplethysmogram (PPG)،Microcontroller Implementation،Convolutional Neural Network (CNN)،Continuous Wavelet Transform (CWT)
چکیده :
Abstract—This paper introduces a robust stress detection system utilizing a Convolutional Neural Network (CNN) designed for the analysis of Photoplethysmogram (PPG) signals. Employing the WESAD dataset, we applied Continuous Wavelet Transform (CWT) to extract informative features from wrist PPG signals, demonstrating enhanced stress detection and learning compared to conventional techniques. Notably, the CNN achieved an impressive accuracy of 93.7% after five epochs, post-implementation on a resource-constrained microcontroller. The optimization process, including pruning and Post-Train Quantization, was crucial to reduce the model size to 1.6 megabytes, overcoming the microcontroller's limited resources of 2 megabytes of Flash memory and 512 kilobytes of RAM. This optimized model not only addresses resource constraints but also outperforms traditional signal processing methods, positioning it as a promising solution for real-time stress monitoring on wearable devices.
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