METHOD FOR MONITORING BRAKE TRAIN NETWORK DENSITY Russian patent published in 2020 - IPC B60T17/22 G01L5/28 

FIELD: machine building.

SUBSTANCE: invention relates to diagnostics of railway traction rolling stock. Method is as follows. When the motor-compressor is switched on, the time of pressure increase in the feed line is measured at 0.05 MPa, then after its deactivation and subsequent pressure reduction in the supply main line at 0.05 MPa, the brake line density is measured by the time of pressure reduction in the supply main line. Results of density measurement, obtained after the first measurements from the moment of measurement beginning after reduction of pressure in locomotive feed line by 0.05 MPa, are registered as minimum density. Results of density measurement obtained during the last measurement before motor-compressor connection are recorded as maximum density. Locomotive driver density parameter is recorded at the operator's command. At that, maximum and minimum locomotive density are stored in memory. After braking line charging and system readiness for density recording, train brake line density is measured to calculate difference of pressure drop time in feed line by 0.05 MPa of single locomotive and similar reduction of pressure with train. At that, pressure in locomotive feed line is taken into account at determination and recording of train density and maximum and minimum train densities are determined, and then, based on ratio of locomotive and train densities, maximum conditional density of cars is determined and recorded. Further, the braking mode is switched on for 1 s and the train density is calculated to determine the number of cars in the braking action. Time after the automatic brakes operation is started. When pressure drop of 0.05 MPa is achieved with non-working motor-compressor, time of pressure reduction is recorded and calculation of braking line length is performed. After registration of train density, it is continuously monitored. Comparing current train density readings with recorded readings of train density and wagons composition. At that, actual density of train and composition of cars is determined each time and maximum and minimum density of train and train composition are calculated. At increased consumption of compressed air and intensive reduction of density of supply main line during 10 s and more, warning information on possible break of brake line is displayed on microprocessor control system monitor.

EFFECT: invention is aimed at improvement of train traffic safety.

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