Abstract:

Aiming at the problem that the existing risk assessment methods are not applicable to the determination of monitoring elements of mechanical safety risk early warning, this study proposes a method to determine monitoring elements based on mechanical safety risk early warning coefficient. By calculating the construction cost factor(CCF), operation and maintenance cost factor(MCF)and efficiency influence factor(EIF), the early warning coefficient of mechanical safety risk was obtained, and the comparison of risk early warning system and safety protection device in safety cost was realized, which serves as the basis for selecting risk reduction measures. At the same time, the process of defining monitoring elements was proposed, including the determination of machine limits, hazard identification, risk estimation, risk evaluation, and determination of mechanical safety risk early warning coefficient. Through a case of determining the monitoring elements of an industrial robot, the validity of the determination method of mechanical safety risk early warning monitoring element was verified. The study shows that the determination method can reasonably select monitoring elements, determine the system risk, estimate the risk size, and consider the economy of measures with small safety risks.

Key words: mechanical safety, risk early warning, monitoring elements, determination method, early warning coefficient, risk estimation