Urban rail train rim vertex circle diameter online detection method and system

Abstract

The invention discloses an urban rail train rim vertex circle diameter online detection method and system. The system comprises two wheel sensors and two pairs of laser transmitting and receiving devices. The two wheel sensors are installed parallel to the rail direction in a spaced manner and used for starting or stopping the laser transmitting devices and conducting train speed measurement. The two pairs of laser transmitting and receiving devices are arranged perpendicular to the rail direction at inclination angles, and the installation heights are different. The wheel sensors are in electric signal connection with the two laser transmitting devices. When the first wheel sensor detects that a train arrives, a signal is sent to trigger the laser transmitting devices to work, laser rays transmitted by the laser transmitting devices are obliquely projected to wheels of the train upwards and scribe two parallel strings from the bottom of a rail, in combination with the laser ray blocking time and the obtained train speed, the diameter of a train rim vertex can be obtained, and when the second wheel sensor detects that all wheel sets of the train pass, a signal is sent to stop working of the laser transmitting devices. The system has the beneficial effects of being simple in design, high in calculation speed and measurement accuracy, capable of achieving online real-time measurement and the like.

Description

technical field [0001] The invention belongs to the field of on-line monitoring of rail vehicles, in particular to an on-line detection method and system for the rim apex circle diameter of urban rail trains. Background technique [0002] As an important part of the train, the wheel set is not only responsible for transmitting all the force between the body and the track, but also bears the centrifugal force generated when passing the curve and the braking force generated when braking, which directly affects the safety and stability of the train operation, so timely Mastering the wear condition of the wheels is of great significance to ensure the safety of vehicle operation. [0003] Among them, wheel diameter is an important item in the geometric parameters of train wheel wear, and its detection mainly includes static detection methods and dynamic detection methods. Static detection is a parameter measurement carried out when the vehicle is not running. Although this detec...

AI Technical Summary

Problems solved by technology

Static detection is a parameter measurement carried out when the vehicle is not running. Although this detection method has high precision, it has low detection efficiency and takes a long turnaround time of the vehicle; dynamic detection is carried out when the vehicle is running, with fast detection speed and no turnaround time. , which is conducive to strengthening the management of the train operating status by the railway system, and is the development trend of the future train wheel set parameter detection

Patent application CN201410320051.2 (A device and method for dynamic measurement of railway wheel diameter) uses wheel sensors, digital cameras and line laser generators to achieve dynamic measurement of wheel diameters based on image analysis methods. High, strong reflection, easy to blur the edge contour of the collected wheel image, resulting in larger diameter measurement error, and it is difficult to ensure the reliability of the measurement

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