Handrail tension monitoring device for a passenger transport system

The invention relates to a handrail tension monitoring device (41) for a passenger transport system (1) designed as a moving walkway or escalator. The handrail tension monitoring device (41) comprises at least a distance sensor (34) and a signal processing unit (47). The measurement signals (M) detected by the distance sensor (34) can be processed and evaluated in the signal processing unit (47). In the signal processing unit (47), the vibration frequency (f) of a scanned handrail (15) of the passenger transport system (1) can be determined from the signal curve (MV) of the measurement signals (M) and said vibration frequency can be compared with at least one lower threshold value (US) and/or upper threshold value (OS), an alarm signal (Z) being generated if the lower threshold value (US) is not reached and a warning signal (W) being generated if the upper threshold value (OS) is exceeded.