Attention-Based Multihead Deep Learning Framework for Online Activity Monitoring With Smartwatch Sensors

The expeditious propagation of Internet of Things (IoT) technologies implanted in different smart devices, such as smartphones and smartwatches have a ubiquitous consequence on the modern population. These devices are employed to collect data and to aid in tracking and analyzing the users' daily activities using various human activity monitoring and recognition (HAMR) techniques. However, most current HAMR approaches rely on exploratory case-based shallow feature learning architectures, which endeavor to recognize activities correctly in real-world situations. To address this issue, we offer a unique strategy for HAMR that leverages the attention mechanism with multihead convolutional neural networks (CNNs) and long-short-term-memory (LSTM). The accuracy of activity detection is improved in the presented method by integrating attention into multihead CNNs followed by LSTM for better feature extraction and selection. Verification investigations are carried out using data from the University of California (UCI) repository, which is publicly available. The results show that our proposed framework is more accurate than current frameworks using both the 10-fold and leave-one-subject-out cross-validation. Finally, the proposed method can recognize human activity in real time, regardless of the type of smart device.