First, system overview
Railway crossing safety is an important part of railway transportation safety. Crossing safety system is also an important part of railway safety protection system. At present, national railways have proposed the leap-forward development ideas of the railway transportation industry. The rapid development of railway transportation will inevitably lead to a rapid increase in the speed of trains and a significant increase in the density of trains, and thus also put forward new requirements for railway safety, in terms of railway crossings. In terms of occupancy frequency, the frequency of occupancy will also be significantly increased, and trains will occupy less time. As a result, the task of safety protection at railway intersections will become more and more onerous, and the crossing will become one of the bottlenecks restricting the safety of railway operations. According to data documents, in addition to suicide and derailment accidents with obvious intentions, there were 294 accidents with trains and pedestrians in Japan in 2012. Of these, only 12 accidents recorded the "Response to the prevention of similar accidents." Moreover, many are simply the simple content of “instructing the driver so that he can improve his attention without neglecting drivingâ€. In the “Overview†section of the accident, many railway operators did not mention the reasons for the crossing accident. Even train speed and other information did not fill in. In response, the relevant person in charge of the Ministry of Land, Infrastructure and Transport of Japan explained: “For pedestrians crossing in front of the train, it is difficult for operators to make countermeasures against recurrence.
Crossing has become a weak link in the safe production of railway transportation, and it is also a dangerous section of road transportation, which directly threatens the personal safety of traffic participants. It is an important issue that urgently needs to be studied and solved in railway and road safety systems; The current status of management system, management tools, early warning monitoring, and protection in crossing safety management system analyzes the main reasons for the frequent occurrence of crossing accidents and the main factors affecting the safety of crossings from the viewpoint of systems theory, and establishes a management system suitable for crossings. Under this system, safety and illegal management methods for crossings were proposed. At the same time, the main features of the trains were: digital intelligent emergency warning of train approaching crossings, intelligent protection of trains passing crossings, and real-time monitoring of safety at crossings. People, vehicles, and roads were The intelligent digital crossing safety system that integrates early warning, monitoring, protection and management turns the safety of crossings from the concept of protection to the concept of combining early warning, monitoring and protection, and finally realizes the comprehensive management of crossing safety. .
Second, the system description
Grade crossings are places where railways and roads cross each other on the same plane. When the railway intersects the road, when the traffic volume is not large or there is no condition for setting up a three-dimensional intersection, a road crossing (referred to as a crossing) should be set up after the road is reasonably merged. Level crossing automatic warning monitoring system is a set of monitoring system designed for road and railway level crossings, and it can realize automatic warning of railway trains and realize automatic control. The system can predict the speed and direction of the train in advance; control the host computer to remotely control the signal lights and siren to warn the road vehicles and pedestrians to move away from the crossing in time and achieve automatic drop-off; at the same time, it can remind the crossing attendants to attend and maintain the traffic order as required. Record the crossing image information of the train passing process and the guard operation information. The use of this system can ensure the normalization of the duty crossing operations, reduce the work intensity of on-duty personnel, improve train safety, and reduce the occurrence of off-road safety accidents. It has become a necessary guarantee system for safety management of level crossings.
Fig. 1: Intelligent digital railway crossing monitoring and protection system block diagram
System Features
 strong environmental adaptability
Taking into account the railway field environmental factors, the system uses industrial-grade equipment, high temperature, low temperature operation, and harsh environment testing can be stable long-term operation. The system's wireless access mode, with its energy management function, can use solar energy to work continuously for 10 days under rainy conditions. The system can be given an early warning in case of power shortage due to excessively severe bad weather and transferred to the manual duty mode. The system can adopt wired access mode, which has strong anti-interference and higher stability, and can comprehensively judge complex vehicle signals in multiple tracks. Suitable for use in large-scale job sites.
The safety of the system is high
Natural disasters such as thunder and lightning, high and low temperatures may impact the front-end acquisition equipment and affect the safe operation of the equipment. In order to ensure the comprehensive security of the system, the system has a device self-test function. When the front-end device is interrupted by communication, the voltage is too low, or the temperature is too low, the system may send out a warning message when the system is faulty. The crossing guards can be transferred to the manual duty mode before the arrival of the warning function to ensure safe operation.
The capacity of the system is strong
The system adopts a modular design. According to the changes in the configuration requirements of different crossings, it can realize different configurations of crossings at different levels. It can realize intelligent management of complex pre-judgment requirements, and can realize early warning, barrier control, crossing signal control and sound. Optional control and process configuration for alarms and other modules.
Standardized safety operations
After the system detects the arrival signal, it can remind the on-duty personnel and control the crossing equipment through various ways. The lights on the control panel prompt warnings, control sirens for sound warnings, voice alarms through speakers, and alarms through control crossing signals. The system pre-determines the human intervention points for each control device according to the control requirements, and can save all alarm and control actions and button operation information in the system for management personnel to inquire afterwards and prompt the personnel to operate according to the specifications.
Level crossings intelligent control system requirements for IPC:
ïµ Fully sealed fanless, high performance, low power control unit;
High temperature and low temperature meet outdoor installation requirements;
ïµ Anti-vibration meets vehicle requirements;
ïµ Wide voltage range input to meet the power instability factor;
ïµOpen data interface and high security performance;
ïµ Convenient remote maintenance, easy maintenance and easy integration;
Third, the conclusion
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The protection of railway crossings is of great significance to improving the passing capacity of railways and roads and ensuring the safety of traffic. After the automatic early warning monitoring system is adopted, although the number of motor vehicles is increasing, traffic accidents will be greatly reduced. This is the charm of intelligent information management. The place.
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