METHOD FOR DETECTING CARS WITH NEGATIVE DYNAMICS Russian patent published in 2023 - IPC B61K9/00 G01M17/08 

FIELD: railway equipment.

SUBSTANCE: methods for measuring and monitoring the dynamic characteristics of cars. In the method, two axle counting sensors are installed on one rail of the measuring section at a given distance from each other and a lidar is placed at a height of at least 4700 mm on a support. When rolling stock passes through the control zone, using axle counting sensors, the moment in time of entry and exit of cars from the measuring section is recorded, the axles of the passing rolling stock are counted and the speed and acceleration of each car are calculated, based on the data obtained, the type of cars in the rolling stock and the order are determined. Using a lidar, the distance to the side of each car of a passing train is measured on at least 100 sections of the side profile. Based on the measurement results, a model of the side of each train car is built and the features of each car of the rolling stock are clarified, the average half-width of the car and horizons free from artifacts are determined, from which two horizons are selected, one is the reference H_rh at a height of ~ 2800 mm from the rail head, and the other is a clarifying H_ch, the first of which is used as the main horizon, and the second as a confirmatory one. Based on the measurements of the coordinates of points on the main and confirmatory horizons, the resulting amplitude and fluctuations are calculated on the main and confirmatory horizons, respectively. Next, the amplitude of vibrations of freight car bodies on the reference horizon is clarified , identify the lateral components of car oscillations, such as pitching, hunting and drift, and compare them with normalized threshold values of the corresponding parameters, on the basis of which a decision is made about the state of each car of the passing rolling stock, the data about which is stored.

EFFECT: increase in the reliability of the measured values of transverse movements, lateral and longitudinal pitching angles of car bodies included in the moving rolling stock is achieved.

2 cl, 2 dwg