Human body heat stress early warning system based on heart rate monitoring and labor metabolism prediction method

Abstract

The invention discloses a human body heat stress early warning system based on heart rate monitoring and a labor metabolism prediction method. The system mainly includes a heart rate monitoring device, a metabolic rate calculation module, a PHS prediction module, a thermal stress index HSI calculation module, a thermal stress grading evaluation module and a human body thermal stress warning module. The method mainly includes the steps of 1) monitoring the real-time heart rate under working conditions; 2) calculating the real-time metabolic rate; 3) calculating physiological parameters and human physiological heat production and heat dissipation through a PSH model; 4) calculating and outputting the actual vaporization heat loss Ereq and the maximum vaporization heat loss Emax; 5) outputting the real-time thermal stress index HIS of a tester; 6) predicting and judging the risk level signals; 7) outputting the thermal stress evaluation level and warning signals by a controller. Accordingto the method, convenient safe evaluation guarantee can be provided for labor protection and occupational injury reduction of labor groups in high temperature operation related industries.

Description

technical field [0001] The invention relates to the field of prediction and evaluation of human body heat stress in a high temperature environment, in particular to a human body heat stress early warning system and labor metabolism prediction method based on heart rate monitoring. Background technique [0002] As global warming continues to intensify and the urban heat island effect becomes increasingly prominent, the frequency and intensity of extreme high temperature weather continues to increase, and outdoor workers, especially manual workers, are at increased risk of high temperature exposure. The existing high-temperature working environment places cannot timely identify and predict the high-temperature exposure risk of the crowd, especially the dangerous crowd at the individual level, resulting in many casualties. Working in a high-temperature environment will cause the human body to sweat a lot, increase the load on the heart, and reduce the heat tolerance of the envi...

AI Technical Summary

Problems solved by technology

Obviously, in the real labor environment, the working status and spatial position of the working people are constantly changing, so their own labor metabolism is also changing. Therefore, the existing PHS model calculation method may lead to systematic errors or even errors, which limits its practical application.

In addition, estimating the metabolic rate based on job experience conceals the different degrees of heat stress caused by individual differences in different personnel, so early warning and protection for high-risk groups cannot be achieved

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