Importance

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Abstract

A method for monitoring the opening and closing process in a system having at least one component moved by electric motor is described. During this process, the following process steps are provided: during the movement of the components, all operating parameters of the motor are captured continuously at time-equidistant measuring moments, the energy balance developing during the movement is formed with the aid of the captured operating parameters of the motor, the total force resulting from the movement is determined from the energy balance and the design parameters of motor and gear, the trapping force is determined from the total force at each measuring moment with the aid of a time window whose window width is selected as time difference between the respective measuring moment and a respective reference moment such that, at least at one reference moment, a trapping force does not yet occur, the course of the trapping force as a function of time is evaluated and a trapping situation is detected when predetermined limit values or threshold values are exceeded, specific reactions are initiated when a trapping situation is recognized.

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First Claim