The laser two-dimensional scanning sensor ZLDS200 and the laser displacement sensor ZLDS100 have advantages such as small size, high frequency, high precision, which can be measured under almost any environmental conditions, and are widely used as precision measuring instruments in the railway industry.
The latest application:
The dynamic two-dimensional scanning measurement of wheel profile and track profile is the most important component of train safety: Wheels and tracks, which are subjected to high-pressure mechanical movements for a long time, have a decisive influence on the operation of the vehicle and the comfort of the vehicle. The wheel-rail system requires regular inspections to ensure the safety of the vehicle's operation. The increase in operating costs caused by mechanical friction between wheel assemblies is also a problem that cannot be ignored.
Therefore, the tests that are still relying heavily on manual operations must be carried out regularly. The manual detection method is very subjective and the measurement results obtained cannot guarantee its accuracy. In contrast, laser dynamic measurement of wheel contours and track contours has an irreplaceable advantage in measuring static wheels and rails.
Compared with the traditional one-dimensional point laser measurement, the laser two-dimensional scanning sensor ZLDS200 can quickly measure the entire profile instead of a few limited measuring points, which can more comprehensively and accurately reflect the surface profile of the wheel and track, and is especially suitable for precision. And on-line measurement systems with high speed requirements. The system adopting ZLDS200 has gradually become the mainstream trend of on-line contour measurement at home and abroad. Its main advantages:
- Fast, comprehensive, and high-precision measurements
- Evaluation of wheel profile and track profile conditions and immediate diagnosis
- Easy to install, easy to measure
- Record and evaluate the condition of the wheel profile and track profile instead of only controlling some measuring points
- Lightweight, portable and easy to use
- No moving parts, longer life, lower maintenance costs
Traditional applications:
Wheel tread profile Online measurement Online automatic measurement Wheel tread profile Equipped to measure the wheel tread and diameter when the tram passes slowly over it. Non-contact laser measurement technology ensures high-resolution and high-precision measurements of the entire wheel tread profile. All parameters required for wheel wear quality assessment can be displayed by the evaluation software.
Wheel profile measurement
The contactless measurement of the wheel profile makes it possible to quickly and accurately measure the wheel set parameters without direct contact. A laser displacement sensor ZLDS100 moves linearly along the profile of the wheel and records surface data. The computer records the scan run distance and laser distance value to obtain the wheel surface profile data, as well as feature change parameters such as wheel rim thickness, height, width, and bearing And wheel size. And, this system is applied to both tramway and metro track measurements, moving forward and backward and directly integrated into the same wheel equipment.
In addition, as a workshop mobile laser - wheel profile measurement system.
Wheel set measurement
The above is only an application measurement of wheel profile change, then applying multiple ZLDS100 sensors in the 2-axis or 3-axis direction of the drive can detect almost all parameters such as wheel profile, collision, brake disc, smoothness, etc., as long as the input wheel is recognized Code, all measured parameters will be automatically collected. The flexibility of the laser displacement sensor ZLDS100 in terms of size, measuring distance and measuring range also allows the transformation or updating of existing contact measuring devices.
Rail flatness measurement
Application of large-scale rail manufacturing companies: Non-contact measurement system, on-line laser measurement of rail surface irregularities, and collection of maximum and minimum data in software, and long-term comparison with similar manual measurements, the results show that the maximum deviation of the results of the two measurement methods Only 0.05 mm. Uneven tracks need to be reground, and grinding requires removing hardened parts of the rails and reducing costs.
Track profile measurement
In order to classify the wear condition of the rail top surface and evaluate the necessary maintenance work, the measuring vehicle installed 5-7 laser displacement sensors ZLDS100 above each side track and operated at 80 miles per hour, recording measurement data every 20 cm, and Compared with the standard data stored by the central computer, the computer classifies the data based on the given deviation value, and records and stores the displacement data of the inspection vehicle superimposed on this measurement data in the computer.
Contact network measurement
The accurate measurement of the position and height of the contact line (rooftop) is very important for the monitoring and installation of the catenary. Appropriate contactless contact line measurement systems have been adopted by the Korea High Speed ​​Rail Corporation (KHRC) and the British OLE Alliance. The laser two-dimensional scanning sensor measures the height and lateral position of the contact line online during operation. In addition, five other laser displacement sensors, the ZLDS100, are mounted on the carriage to measure the inclination, lateral displacement and track spacing of the carriage. All these data can be The graph shows that this measuring system can be operated in almost any environment (rain, high temperature or frosty weather).
Track section measurement
In order to carry out the necessary grinding of the track profile, the shape must be monitored before and after grinding. For this purpose, the ZLDS100 is used to point along the cross-sectional direction of the track, or a laser scanning device is used: the measurement point is scanned along the lateral profile of the track. The track section is compared with the standard shape stored in the computer, and the grinding parameters can be adjusted accordingly. .
Research and development
The laser displacement sensor ZLDS100 installed on the track side can measure the position of the locomotive wheels at the high speed. A number of sensors on the same line near the measuring point collect the measured information on the running status of the locomotive wheels and optimizes them within the measuring points. At the same time, the positions of the rails and the wheels are measured to record the running status of the wheel devices. Other R&D applications include: displacement measurement of rails, coupling measurement of cars, vehicle inclination measurement and detection of connection line position.