Railway Crossroad Control System

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One of the problems, which arise during the railway operation, is a problem of providing safety at the railway crossings. This problem is of actual value for all the countries with railway transportation service. The problem arises owing to the fact that railway crossings are not equipped well and the installed equipment got out of date.

Problems with railway crossings lead to the unproductive stoppages of the railway and automobile transport, faults in train schedule and accidents which includes traffic fatality. The most characteristic problems in railway crossing operation is lack of required amount of road signs, traffic light and sound signaling, lightning and poor visibility of the train. The described problems have well studied and proven methods of solving them that are widely used in the countries with developed system of railway transportation.

Modernization of the railway crossing automation or development of the new warning and control automatic system (traffic lights, traffic control barriers with audio announcement) are intended for improving safety of crossing both serviceable and non-serviceable railway crossings.

Our company has great experience in providing safety for railway transportation. Systems, developed by out specialists, were successfully realized in the countries of Asia and Europe. To solve this problem our company offers to implement highly reliable intelligent systems of providing safety. The core of the control system for safety tasks is expandable both centrally and peripheral. RCCS is constructed for low maintenance and enables easy replacement of components. The equipment is certified to be complaint with existing EU safety requirements and quality standards.

The system is intended to be installed at railway crossings and can be integrated with the systems of earlier generations. The system based on state-of-the-art hardware-based solution that requires minimum labor cost for maintenance.

Effective and flexible control of the railway crossing is provided by the system. Train-handling capacity of the railway section is also regulated by the system.

The system is intended for:

  • train situation control in the operative range of the railway crossing equipment;
  • processing of the railway crossing operation local logic by the executive devices;
  • safety control at the railway crossing;
  • diagnostics of railway crossing equipment failures.

After installation the object can be operated in fully automated mode or as a part of the system.

Periodically the system runs diagnostics of railway crossing equipment failures not to lose control over the object.

Information about the equipment failures is registered by the central control block and takes part in railway crossing operation logic. It is also transmitted to the services that maintain the object.

SYSTEM FUNCTIONS

The system is installed on the single track railway crossing with double-direct running. The main functions of the system are:

  • detection of the train crossing the axle counting section in both directions;
  • counting of the passed axles (optionally);
  • primary data processing of axle detection/counting;
  • speed determination of the passing train;
  • data transmission to the higher level of the train control system;
  • control of the railway applications for railway crossing (barriers, traffic lights, etc.);
  • diagnostics of railway applications for railway crossings (barriers, traffic lights, etc.)

SYSTEM ARCHITECTURE

Railroad Crossroad Control System Architecture

The core element of the system – the main controller– is a safety oriented programmable logic controller that can be extended both centrally and peripheral.

The main controller carries out all control and supervisory tasks of the system. The conditions for the activation and monitoring of the road warning devices, the dependency to activate the driver Indication signal, the monitoring of the voltage supply, the logic of manual control, as well as the analysis of the automatic control are key functionalities defined in the software of the main controller. In addition the main controller records all events, errors, and incidents and offers comprehensive diagnostics.

The road warning devices are activated in parallel by the safety redundancy controller to enable STOP for the road traffic in case of a safety shut down or the breakdown of the main controller. The safety redundancy controller is connected to the central computer via the system bus.

The level crossing will be activated if a train passes the activation point (WS1.1, WS2.2) approaching the lx. The road warning devices are turned on and show red blinking light. After a variable time all barriers are closed and the respective protection signal switches from red to white. The level crossing is opened after all railway vehicles have left the level crossing area (after all vehicles have passed WS2.1 and WS1.2). The manual control panel allows the manual closing and opening of the level crossing in special cases (i.e. for shunting).

Railroad Crossroad Control System Architecture

Decision about the occupancy of the axle counting section is made according to the information about the train passing the boundaries of the sections «Control section 1» and «Control section 2».

Electromechanical barriers with low power drives are used. The main controller and the corresponding power stages perform the activation, control of opening and closing times as well as the supervision of the barrier position.

In order to detect approaching trains and automatically control the protection system wheel sensors Frauscher in combination with evaluation boards IMC are used. The main controller evaluates the pulses, generated by the evaluation boards and initiates warning and closing of the barriers. If required axle counting modules are used to approve that all rail vehicles have left the level crossing area. Automatic control can be adapted according to the specific customer requirements. Due to axle counting RCCS also enables the realization of active level crossing protection systems on railway lines where driving on sight is used.

An integrated diagnostic PC provides all required information for maintenance and fault clearance on-site to the maintenance personnel. The diagnostic PC can be connected to higher level diagnostic - or remote control systems using communication channels such as GSM, GPRS, or Ethernet. Optionally RCCS is equipped with an integrated GSM/GPRS-Modem to enable transmission of malfunction information via SMS and e-mail and access to remote maintenance. Forwarding using SMS and email is defined centrally for each attachment and can be directed to different addressees depending on message and attachment.

CENTRAL CONTROL UNIT

Railroad Crossroad Control System Architecture

ADVANTAGES OF IMPLEMENTATION

Modern technological solutions, that we offer, are based on application of the System of train positioning and control using the system of axle counting, set of rail sensors, computation and communication modules, power modules and executive devices such as traffic control barriers that transmit light and sound signals. The system we offer is cross-functional and allows to organize automatic control of the railway crossing equipment of any configuration. In its turn, it allows to exclude the necessity of expensive testing of each railway crossing. It can be integrated into existing Vietnam system of railway transportation and provides operational supervision with the high level of safety.

The advantages of the system we offer are:

  • reliability;
  • high cost effectiveness;
  • ease of use;
  • opportunity to be applied for any configuration of the rail crossings.