Abstract: A method for detecting useful signals in an overall signal. Each useful signal may be affected with a frequency drift. In the detection phase, frequency spectra for detecting the overall signal for multiple detection time windows are calculated and useful signals according to the detection frequency spectra are detected. In the estimation phase, for each useful signal detected: the frequency of the overall signal for multiple frequency drift values is reset. In the estimation phase, for each useful signal detected, a frequency spectrum is calculated for the estimation of the overall signal for each frequency drift value over an estimation time window having the useful signal detected and of a duration higher than the detection time window. In the estimation phase, for each useful signal detected, the frequency drift is estimated affecting the useful signal detected according to the estimation frequency spectra.

Abstract: A method for detecting useful signals in an overall signal. Each useful signal may be affected with a frequency drift. In the detection phase, frequency spectra for detecting the overall signal for multiple detection time windows are calculated and useful signals according to the detection frequency spectra are detected. In the estimation phase, for each useful signal detected: the frequency of the overall signal for multiple frequency drift values is reset. In the estimation phase, for each useful signal detected, a frequency spectrum is calculated for the estimation of the overall signal for each frequency drift value over an estimation time window having the useful signal detected and of a duration higher than the detection time window. In the estimation phase, for each useful signal detected, the frequency drift is estimated affecting the useful signal detected according to the estimation frequency spectra.

Abstract: An elevator shaft door frame incorporates a control arrangement for an elevator installation including a control unit. The control unit is fixed in a chamber of a frame element of the door frame. The chamber communicates with an outside opening in the door frame, which opens at a floor, and is closed with a cover. The cover can be moved from the closed position by demounting to a service position in which access to the chamber is free. In addition, the door frame has an inside opening to the chamber which is accessible from the elevator shaft.

Abstract: An elevator shaft door frame incorporates a control arrangement for an elevator installation including a control unit. The control unit is fixed in a chamber of a frame element of the door frame. The chamber communicates with an outside opening in the door frame, which opens at a floor, and is closed with a cover. The cover can be moved from the closed position by demounting to a service position in which access to the chamber is free. In addition, the door frame has an inside opening to the chamber which is accessible from the elevator shaft.