Wheelset Laser Measurement for Non-Stop Wear and Polygon Detection
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Solution Overview
Problem
Existing methods for measuring wheel set parameters in rail transit vehicles are inefficient, prone to human error, and lack the necessary precision and automation for accurate, non-stop detection of wheel wear, equivalent conicity, and wheel polygon.
Innovation Solution
An online high-precision measuring device using multiple laser sensors and a polygon measuring module to automatically measure wheel set parameters, including inner distance, tread profile, axle lower profile, and radial runout, with a floating probe and displacement sensor for contactless data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual operation of hand-held measuring instruments is used, then measurement can be performed, but measurement efficiency is low and time-consuming
Solution Approach 1:
The patent replaces manual mechanical measurement instruments with an automated laser sensing system. The laser sensors automatically emit and receive light to measure wheel set parameters, eliminating the need for manual operation of hand-held measuring instruments and significantly improving measurement efficiency.
Solution Approach 2:
The measurement system is designed to automatically perform measurements without human intervention. The laser sensors, polygon measuring module, and data processing system work together autonomously to complete the entire measurement process, allowing the train to pass through without stopping and enabling continuous operation.
2Measurement precision
If under floor wheel lathe measuring device is used, then measurement can be performed, but the train must stop for wheel lathing work
Solution Approach 1:
The patent enables continuous measurement by positioning the laser sensors and polygon measuring module along the track. As the train passes through continuously, the measurement system continuously captures data from each wheel set without requiring the train to stop, thereby maintaining high train utilization rate while achieving accurate measurements.
Solution Approach 2:
The patent introduces an intermediate measurement system consisting of laser sensors and a polygon measuring module that can perform measurements without requiring wheel lathing. This intermediary system allows measurements to be taken in the normal operational state of the wheel sets, eliminating the need to stop trains for dedicated measurement operations.
3Productivity
If dynamic detection system is used, then non-stop measurement can be achieved, but measurement accuracy is low
Solution Approach 1:
The patent divides the measurement task into multiple specialized components: laser sensors for measuring inner distance and tread profile, and a polygon measuring module with floating probe for measuring radial runout. Each component is optimized for its specific measurement function, and their combined data provides comprehensive and accurate wheel set parameters while maintaining non-stop measurement capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves high-precision, automated measurement of wheel set parameters with minimal human intervention, enabling non-stop train operation and efficient, accurate detection of tread wear, equivalent conicity, and wheel polygon.
Implementation Method 1
a first laser sensor, arranged on an inner side of a track bearing the wheel set, is configured to measure data of an inner distance of the wheel set
Implementation Method 2
The second laser sensor is configured to measure data of a profile of a tread of the wheel set
Implementation Method 3
the polygon measuring module is butted with the track and is configured to measure a radial runout value of the tread of the wheel set
Data Source
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AI summary
An online high-precision measuring device for full-size parameters of a wheel set of a rail transit vehicle, includes: a first laser sensor, a second laser sensor, a third laser sensor, and a polygon measuring module that are configured to measure multiple parts of the wheel set. The first laser sensor is arranged on an inner side of a track at a certain angle. The second laser sensor is arranged below the track at a certain angle. The third laser sensor is arranged on an outer side of the track at a certain angle. The polygon measuring module is butted with the track. The device can realize online pass-through non-stop measurement of the full-size parameters of the wheel set of the rail transit train accurately, such as tread wear, equivalent conicity and wheel polygon.