随着可穿戴设备的普及和移动互联网的发展，生理信号的采集和获取变得更为便捷。生理信号分类是根据人体物理现象判断用户状态或意图的研究，该研 究在健康监测、情绪判断和人机交互领域都有广泛的应用前景，因此开展该研究具有重要的应用价值。 生理信号由多模态信号组成，其时间、空间和频率特征复杂，并且存在着信噪比较低和个体差异性大等特点，这对生理信号模式分类带来了挑战。本文利用 生理信号开展了睡眠分期、情绪识别和人机交互等三项研究工作。 本文的主要研究内容和贡献如下：
With the popularity of wearable devices and the development of mobile Internet, the collection and acquisition of physiological signals have become more convenient. Physiological signal classification is the study of judging the user's state or intention based on the physical phenomena of the human body. The study has a wide range of application prospects in the fields of health monitoring, emotional judgment and human-computer interaction, so it has important application value to carry out this research.
Physiological signals consist of multimodal signals with complex temporal, spatial and frequency characteristics, and are characterized by low signal-to-noise ratio and high individual variability, which pose a challenge for physiological signal pattern classification. This paper discusses each of the three tasks in using physiological signals for sleep staging, emotion recognition and human-computer interaction.
The main research and contributions of this paper are as follows.
Sleep staging of physiological signals based on Transformer encoder
To address the problem of long-time dependence of physiological signals in sleep staging tasks, this paper proposes SleepZzNet, an end-to-end automatic sleep staging model, which contains multiple convolutional neural networks and Transformer encoders for extracting waveform features and long time-dependent sleep transition features, respectively. A classification accuracy of 86.10\% was achieved on the SleepEDF dataset, surpassing the current state-of-the-art modeling methods. In addition, we recruited subjects to collect their physiological signal data during sleep and experimentally demonstrated that our model has good generalization ability.
EEG signal emotion recognition based on spatio-temporal attention mechanism
For the problem of complex temporal, spatial, and frequency features of physiological signals in emotion recognition tasks, we propose VitEmoNet. the model uses a spatio-temporal attention mechanism for extracting features in multiple dimensions of frequency, space, and time. the Transformer encoder model is used for feature fusion and pattern classification. The accuracy can reach 94.26\% on the SEED dataset, which is on par with other advanced models.
Human-computer interaction system based on eye-movement signals
This chapter proposes an HCI system based on oculogram signals, which collects the user's oculogram signals from multiple orientations, uses a classifier to determine the user's directional category of vision, and obtains a corresponding control strategy for moving the input device connected to the HCI device. This system can reduce software and hardware costs while achieving simple and effective human-computer interaction.
|Keyword||生理信号分类 睡眠分期 脑机接口 Transformer|
|陈惠宇. 基于深度学习的生理信号分类研究[D]. 中国科学院自动化研究所. 中国科学院自动化研究所,2022.|
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