The operation line of urban ground rail transit usually adopts the mode of sharing road rights. In this mode, there will be a series of road accidents, such as pedestrian disobeying traffic rules, social vehicles occupying rail train lanes and so on. Simply relying on the manual observation of the driver can not guarantee the safety of operation, ground rail traffic accidents occur from time to time.
Non-contact obstacle detection system (millimeter-wave radar) is a kind of obstacle detection system which detects the moving target within 100 meters ahead of the ground track train. The system consists of two parts: the on-board detection device and the on-board control main engine. The on-board detection device using remote and close range dual millimeter wave radar sensor for detection, and the long-range millimeter-wave radar is mainly used to detect obstacles within 100 meters in front of the train. The millimeter-wave radar at close range carries on the second detection to the wider area around the train in the range of 50 meters, and the detection data is transmitted to the main engine of the vehicle through the cable. When the size of the detected obstacle exceeds the set threshold. Vehicle control host output acousto-optic alarm signal to the driver warning.
Millimeter-wave radar has the characteristics of all-weather operation, it can detect multi-dimensional parameter information such as distance, velocity and angle of target, while dual-millimeter-wave radar ensures the accuracy of obstacle detection information. Thus, the reliability of the system is greatly improved.