Human body cold stress fine grading evaluation system in low-temperature operation environment

Abstract

The invention provides a human body cold stress fine grading evaluation system in a low-temperature operation environment. The system comprises the following steps of selecting metabolic rate values which accord with actual labor intensity and labor types of human bodies from an established metabolic rate database; selecting dynamic thermal resistance and moisture resistance values of clothes according with the actual environment from the established dynamic thermal and moisture resistance database of clothes and substituting the values into the system; calculating time-varying core temperature, local skin temperature and average skin temperature of human bodies in the low-temperature cold environment through the established human body cold stress partition fine prediction model. Comparedwith index thresholds of different cold stress stages, cold stress level of human bodies is evaluated. Therefore, acceptable longest exposure time for human bodies is determined, measured value is more accurate, predictability is good, guidance is provided for selecting appropriate emergency equipment according to the cold environment and reasonably arranging organization and production strategiesin the cold environment. Theoretical basis and guidance are provided for reduction of occupational injuries in China, personnel cold stress risk is reduced, and personnel life safety is protected.

Description

technical field [0001] The invention belongs to the technical field of public safety, and in particular relates to a fine-grading assessment system for human body cold stress in a low-temperature working environment. Background technique [0002] In recent years, various disasters and accidents have occurred frequently in our country. During the severe winter period, especially in plateau areas, emergency rescue and rescue workers will be exposed to low temperature or even extremely low temperature and cold environment for a long time. When the core temperature and skin temperature are lower than the normal range , life, health and safety will be greatly threatened. [0003] A coupling system and coupling method of CFD and human thermal response model disclosed by Tsinghua University (application number: 201710322997.6) and a coupling system and coupling method of sweating thermal manikin and human thermal response model (201710323007.0) and Tsinghua University Hefei Public ...

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Problems solved by technology

[0004] These systems and methods are mainly used for the safety assessment of human body heat stress in high temperature environment. There is a big difference between the physiological response of the human body and the physiological response of the human body in a high-temperature hot environment, such as the cold-induced vasoconstriction response of fingers and toes, etc. Air resistance and moisture resistance are also important factors affecting the prediction and grading of human body cold stress. These factors have not been fully considered in the above systems and methods, so they are not suitable for fine grading assessment of cold stress in low temperature environments.

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