Although the increase of operation speed of emu trains has improved the efficiency of regional traffic, it also puts forward higher and higher requirements on operation safety. Wheel tread inspection is the key point in vehicle detection. If the wheel tread profile cannot be completely and accurately measured, and the over-limit can be timely found and dealt with, serious accidents such as pole tilt and derailment may occur. Accurate measurement of wheel tread size and other parameters is of great significance for safe operation of emu. The traditional steel gauge and other tool measurement methods have been unable to meet the demand of the inspection side, high-speed emu wheel tread detection equipment has been widely used to solve the problems existing in the traditional wheel tread detection.
The detection part of high-speed emu wheel tread detection equipment is the portable wheel tread detector, which is mainly composed of the measuring instrument itself, the dedicated data transmission line of the measuring instrument, the measurement and analysis software, flash memory mobile memory, personal digital assistant equipment and other accessories.
The dish body structure is composed of positioning frame, positioning column, sensor, data transmission port and measuring tumbler.
The testing equipment with a special high tip for sensors, optical encoder basin turning arm by hand the machine test and the direct contact with the wheel tread wheel tread shape data, through the USB interface is connected to a portable computer, application of analysis software, a dedicated measurement of quickly and accurately to side step surface appearance, and form a normalized data files saved in the computer.
In order to ensure the accuracy of detection, the wheel tread side inspection equipment of emu is provided with 5 datum points. Three of them are on the back panel and the other two are the contact points between the equipment and the wheel rim. The reference cylinder is mounted on the back plate and used to assist the calculation of rim diameter and rolling circle diameter. The calculation of the data is based on two high-resolution optical encoders on the equipment. According to the Angle of the encoder and the relationship between the instrument, the section is calculated by software, so that the measurement accuracy of the section reaches 0.01mm and the diameter of the basin is 0.25mm.
