Human Condition Monitoring by Optical Fiber Sheet Sensor Detecting Polarization Fluctuation

A new method of human condition monitoring was proposed by using the optical fiber embedded sheet sensor and the polarization fluctuation measurement system and the fundamental performance was demonstrated. This paper describes the principle of the measurement, the configuration of demonstration system and the abilities of condition estimation. As results of fundamental experiments and of field tests, the human condition including large action, resting condition on the bed and keeping off the bed could be estimated by the level of polarization fluctuation. The respiratory condition was detected by the cyclic fluctuation of polarization in the quiet condition. In addition, a precise method was discussed to distinguish the turning actions by the shift patern of the center of polarization states between two quiet conditions before and after the large action.