DOZE JUDGING DEVICE USING SATURATION PERCENTAGE OF OXYGEN IN ARTERY BLOOD IN JUDGING DOZE

PROBLEM TO BE SOLVED: To prevent a traffic accident caused by a doze at the wheel. SOLUTION: The saturation percentage of oxygen in the artery blood (SpO2), one of biological data of human body, is used as a means for judging a doze. At the start of a doze, SpO2 lowers drastically; then after formin...

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Bibliographische Detailangaben
1. Verfasser:	ONODERA KAZUMASA
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES DIAGNOSIS HUMAN NECESSITIES HYGIENE IDENTIFICATION INSTRUMENTATION OR DASHBOARDS FOR VEHICLES MEDICAL OR VETERINARY SCIENCE PERFORMING OPERATIONS PHYSICS ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT SIGNALLING SURGERY TRAFFIC CONTROL SYSTEMS TRANSPORTING VEHICLES IN GENERAL
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Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent a traffic accident caused by a doze at the wheel. SOLUTION: The saturation percentage of oxygen in the artery blood (SpO2), one of biological data of human body, is used as a means for judging a doze. At the start of a doze, SpO2 lowers drastically; then after forming a minimum value, the SpO2 begins to rise and forms a maximal value. After that, the value lowers a little and comes near to a stable value before the start of the doze. The change of the value is a result of the interactions between the sympathetic nerve and the parasympathetic nerve. Therefore, the reproductivity is high and there is little difference by person, so the method using SpO2 is the most appropriate for judging a doze. The device using the method for judging a doze judges a doze by storing the standard curve of SpO2 indicating a doze in the device beforehand and comparing the curve and the change of SpO2 value in time at the time of driving a car. The device is comprised of an oxymetry function part using red light and infrared light and a comparator.