Real time wheel geometry measurement system 3DWheel Manual
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REAL TIME WHEELS GEOMETRY MEASUREMENT SYSTEM 3DWheel Series User's manual www.riftek.com info@riftek.com

Real Time Wheels Geometry Measurement System. 3DWheel Series

Real Time Wheels Geometry Measurement System. 3DWheel Series

Real Time Wheels Geometry Measurement System. 3DWheel Series Safety precautions and measurement conditions · Use supply voltage and interfaces indicated in the system specifications. · In connection/disconnection of cables, the system power must be switched off. · The system must be grounded. All power cables must be shielded. The system has been developed for use in industry and meets the requirements of the following Directives: · EU directive 2014/30/EU (Electromagnetic compatibility). Laser safety The 3DWheel system includes laser scanners RF627, which correspond to the 2M or 3B safety...

Real Time Wheels Geometry Measurement System. 3DWheel Series The following safety measures should be taken while operating the scanners: · Do not target the laser beam to humans. · Do not disassemble the scanner. · Avoid staring into the laser beam. General information The 3DWheel system is designed for non-contact automatic measurement of geometrical parameters of wheelsets. The system uses a combination of 2D laser scanners RF627 Series mounted wayside in the track area and calibrated into one common coordinate system. All measurements are performed in the real-time mode. The main...

Real Time Wheels Geometry Measurement System. 3DWheel Series Basic technical data Measurement range Parameter Flange height, mm Flange thickness, mm Flange slope, mm Rim thickness, mm Tire width, mm Wheel diameter, mm Back-to-back distance, mm Value 20...45 20...50 1...15 30...100 20...120 400...1400 according to the track width Measurement error Flange height, mm Flange thickness, mm Flange slope / qR factor, mm Rim thickness, mm Wheel width / Rim width, mm Wheel diameter, mm Back-to-back distance, mm Other technical data Parameter Power supply (control cabinet), V Power supply (air...

Real Time Wheels Geometry Measurement System. 3DWheel Series Structure and operating principle The 3DWheel system has a modular and open configuration, which makes it possible to adapt it to any types of railroad tracks and railway wheels, and to reduce the technical maintenance to a minimum. A functional diagram of the system is shown in Figure 1. The main modules of the 3DWheel system are as follows: 1) Laser scanning modules. These modules are intended for scanning of the wheelset. They contain 2D laser scanners RF627 Series mounted wayside in the track area and calibrated into one...

Real Time Wheels Geometry Measurement System. 3DWheel Series The 3DWheel system also includes a controller of RF700 series (see Annex 1). It controls the air conditioning cabinet, the power of the laser scanning modules and HTC boards in scanners, as well as the power of the moving blinds. It processes signals from four inductive sensors and generates sync pulses for scanners. The 3DWheel system operates as follows. The Position monitoring module detects the rolling stock. When the rolling stock is detected, the Control module turns on the Laser scanning modules and opens the protective...

Real Time Wheels Geometry Measurement System. 3DWheel Series Inner side: Modules containing two scanners are placed on the outer side of the rail. Modules containing three scanners are placed on the inner side of the rail. In order to avoid mutual influence on each other, scanners located on the opposite sides of the rail have lasers of different wavelengths (RED and IR).

Real Time Wheels Geometry Measurement System. 3DWheel Series After detecting the wheelset, the laser scanning modules are activated and scan the wheelsets when the rolling stock is passing through the control area. Upon completion of the scanning process, laser scanning modules will be turned off. Three scanners (#2, #3 and #4 - see Figure 3) are used to measure the wheel diameter. In the calculations, a three-point method is used to determine the position and diameter of the wheel, as well as the method of averaging by measuring in several positions of the wheel while passing through the...

Real Time Wheels Geometry Measurement System. 3DWheel Series Calculations The coordinates of the vectors perpendicular to the chords of the circle: The condition of orthogonality of vectors the scalar product of vectors is equal to zero: 11 Thus, we obtain a system of linear equations with two unknowns X and Y. Solution Circle radius The wheel profile is assembled by two pairs of scanners: #1-2 and #4-5. In this case, an undistorted profile is calculated by mathematical transformations, and this undistorted profile is used for further calculations of all necessary parameters of the wheel...

Real Time Wheels Geometry Measurement System. 3DWheel Series The back-to-back distance is measured at three points on the wheel and averaged. Figure 7 shows three pairs of scanners whose measurements are used for calculations. Laser scanning modules come with the special protective housings equipped with the air conditioning system. To eliminate the influence of vibrations and shocks, laser scanning modules are equipped with shock-absorbing supports. Overall and mounting dimensions of laser scanning modules are shown in Figure 8.

Real Time Wheels Geometry Measurement System. 3DWheel Series Air conditioning and protection module The Air conditioning and protection module is designed to maintain a stable temperature inside the laser scanning modules, as well as to protect the laser scanners against mechanical damage. The heating system is activated when the thermostat inside the protective housing registers a temperature below +15°С. The air is heated by built-in heaters, the warm air circulation is provided by built-in fans. The cooling system is activated when the thermostat inside the protective housing registers a...

Real Time Wheels Geometry Measurement System. 3DWheel Series L1 = max speed (km/h) * 3 / 3.6 max speed (km/h) | L1 (m) 10 | 8.5 30 | 25 40 | 33.5 50 | 42 The minimum train speed is calculated by the following formula: SpeedMin = L1 / measurement timeout When the wheelset is detected by the first inductive sensor (1), the Control module opens the moving blinds on the protective housings and switches the Laser scanning modules to the data acquisition mode. When the wheel is detected by the next inductive sensor (2) placed directly in front of the Laser scanning modules, the Control module...