MEMS ultrasonic transducers for safe, low-power and portable eye-blinking monitoring.

Sun, Sheng 
Zhang, Menglun 
Ning, Yuan 
Ma, Dong 

Change log

Eye blinking is closely related to human physiology and psychology. It is an effective method of communication among people and can be used in human-machine interactions. Existing blink monitoring methods include video-oculography, electro-oculograms and infrared oculography. However, these methods suffer from uncomfortable use, safety risks, limited reliability in strong light or dark environments, and infringed informational security. In this paper, we propose an ultrasound-based portable approach for eye-blinking activity monitoring. Low-power pulse-echo ultrasound featuring biosafety is transmitted and received by microelectromechanical system (MEMS) ultrasonic transducers seamlessly integrated on glasses. The size, weight and power consumption of the transducers are 2.5 mm by 2.5 mm, 23.3 mg and 71 μW, respectively, which provides better portability than conventional methods using wearable devices. Eye-blinking activities were characterized by open and closed eye states and validated by experiments on different volunteers. Finally, real-time eye-blinking monitoring was successfully demonstrated with a response time less than 1 ms. The proposed solution paves the way for ultrasound-based wearable eye-blinking monitoring and offers miniaturization, light weight, low power consumption, high informational security and biosafety.

Publication Date
Online Publication Date
Acceptance Date
Article, /639/166/987, /639/925/929/170, article
Journal Title
Microsyst Nanoeng
Journal ISSN
Volume Title
Springer Science and Business Media LLC
National Natural Science Foundation of China (National Science Foundation of China) (62001322)