In order to improve the operating efficiency and safety and reduce the working error
a sensor measurement system was used to test the human physiological information in precision machining such as electroencephalogram
electromyogram of forehead
blood pulse
respiration and shaking of body etc.The results of test and detailed analysis show that there is close correlation between the physiological information and fatigue symptom in precision machining.The research makes it possible to estimate fatigue by physiological information in human-machine engineering.