부산대학교 도서관

Float tanks are returning as a form of treatment in a number of recreational and healthcare environments. This creates the need for biosensors capable of collecting empirical data during float sessions to identify and quantify the resulting health effects. This paper presents the selection and validation of off-the-shelf biosensors to aid researchers and float tank entrepreneurs investigate the effects of this novel healthcare environment. We developed modifications to the selected devices to ensure usability in the unique environment created by float tanks, and these modifications were tested to determine their effectiveness in protecting the devices and reducing excessive sensory input that would detract from the float experience. After a process of validation and verification, it was determined that the modified biosensors can successfully monitor movement, ECG, respiration, and blood pressure during float sessions. Our selected EEG device was unable to work in this environment. After testing and validation, we developed a method to ensure time synchronization between devices. The method was tested against a standardized physiological recording device, and the tests verified the accuracy of the biosensors' timestamps. Additional experiments between devices further validated the technique and illustrated how an event can be identified in multiple data streams. The proposed biosensors and methods can be used to accurately study changes in physiological variables during float sessions.