Siemens Schweiz Ag

Rolf B&auml;chtiger

Max Loder

Reto Schreppers

The behavior of the bogie of a muliple-axle vehicle is monitored. Accelerations of at least two axles of the bogie are measured with acceleration sensors allocated to the axles. The sensor signals are subjected to a Fourier transformation in FFT units. The frequency profiles resulting from the Fourier transform are compared with profiles that are stored in memory. Differences that are detected are compared with threshold values and messages are correspondingly sent to the system that controls the vehicle. The monitoring system allows mechanical operating errors of the bogie to be detected independently of effects caused by the running surface upon which the vehicle travels.

Method and device for monitoring bogies of multi-axle vehicles

A process is disclosed for communication systems used in traffic engineering and having an earthbound transponder for each corresponding track section. The transponders transmit first data through a first path of transmission to polling machines arranged on vehicles. Based on these first data, the concerned polling machine ascertains whether second data transmitted through a second path of transmission to the polling machine are really destined for the vehicles. The signal in the second path of transmission destined for the vehicles of a section of the track is individually modulated or transmitted by a time- or frequency-multiplexing process. Depending on the selected modulation or multiplexing, coefficients are built at the emitter side which are then transmitted through the first path of transmission, extracted at the receiver side and used to demodulate or demultiplex the signal transmitted through the second path of transmission. The physical separation of the transmitted signals makes it possible to ascertain whether the signals received through the second path of transmission are destined for this section of the track or the vehicles that circulate thereon.

Growing community of inventors

Oberwil-Lieli, Switzerland

Rolf Bächtiger

Growing community of inventors

Oberwil-Lieli, Switzerland

Rolf B&auml;chtiger

Rolf Bächtiger