A system and method for online measurement of wheel set geometric parameters

Abstract

The invention provides an online measurement system and an online measurement method for geometric parameters of a wheel set. The system comprises at least one measurement unit, wherein the measurement unit comprises at least one sensor group; each sensor group comprises a first structured light sensor and a second structured light sensor; each first structured light sensor is a multi-line structured light sensor and is arranged inside a rail of the wheel set; each second structured light sensor is arranged outside the rail of the wheel set. According to the measurement system disclosed by the invention, the geometric parameters of the wheel set are measured quickly and accurately online.

Description

technical field [0001] The invention relates to the technical field of measurement of wheelsets, in particular to an online measurement system and method for geometric parameters of wheelsets. Background technique [0002] The wheel set is the basic out-of-shape part of the train, and the measurement of its geometric parameters is an important measure to ensure the safety of railway transportation. At present, the automatic measurement of the geometric parameters of the wheel set mainly adopts three methods: measuring instrument, contact sensor and non-contact sensor; among them: [0003] When using an automatic portable measuring instrument for measurement, it is necessary to use a variety of sensor technologies to measure the parameters of the wheel set, and it still requires manual participation. Automatic measurement cannot be realized, and the efficiency and accuracy are low, which cannot meet the needs of rapid development and reliability of the railway; [0004] When...

AI Technical Summary

Problems solved by technology

[0003] When using an automatic portable measuring instrument for measurement, it is necessary to use a variety of sensor technologies to measure the parameters of the wheel set, and it still requires manual participation. Automatic measurement cannot be realized, and the efficiency and accuracy are low, which cannot meet the needs of rapid development and reliability of the railway;

[0004] When using a contact sensor for measurement, it is necessary to first use a bracket to support the wheel set to make it rotate, and then use a variety of sensors to measure the parameters of the wheel set. The defect of this measurement method is that the wheel set needs to be disassembled, which is time-consuming and laborious, and indirectly increases the cost. And it is impossible to realize and obtain real-time measurement of wheel set parameters;

[0005] When using non-contact measurement, the measuring device is installed at the place where the train enters and exits the warehouse. When the train passes the measuring device, the system measures the parameters of the train wheel set in real time. However, the current measurement method uses a single-line structured light sensor to scan the wheel set. During the walking process, it belongs to the S-shaped route on the rail, and the straight-line walking route of the wheel set cannot be guaranteed. Therefore, the information on the inner side of the wheel set acquired by a single single-line structured light sensor is inaccurate, resulting in low accuracy of the obtained base point position; At the same time, because the relative position between the wheel and the rail is affected by vibration, when measuring the wheel diameter, at least three base points of the wheel tread are not on the same circle, so this method is usually unable to accurately measure the real wheel diameter and Other parameters

Images