Automatic Measurement of Nasal Temperature based on the Combination of a Motion-Sensing Devices and an Infrared Sensor

In recent times, several marine accidents have occurred because of human errors. Mental workload is considered as one of the causes of human errors. The physiological index such as heart rate, nasal temperature, brain wave and saliva are commonly used to measure mental workload. Among these, we focus on nasal temperature as it can measure mental workload without contacting subjects. However, measuring nasal temperature is time-consuming because of the manual detection of the nasal position in infrared (IR) images. This study proposes an automatic method for the measurement of nasal temperature based on the combination of motion-sensing devices and an IR camera. Based on experiments conducted using simulators, the automatic measurement of nasal temperature using both motion-sensing devices and an IR camera has been demonstrated. It is necessary to adjust the coordinate system of the motion-sensing devices and IR camera to accurately measure nasal temperature.