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NR Conductor Rail Web Reporting System (CR WRS)

Conductor Rail Web Reporting System

Welcome to the Network Rail Conductor Rail Web Reporting System (CR WRS) . Note this is a prototype web site and is currently under development.

Click on the MDU links below in order to access the reports within the CR WRS that are available for each MDU.

In order to provide information on the condition of the conductor rail, a Conductor Rail Measurement System (CRMS) has been developed and is currently installed on the Electrical Monitoring Vehicle (EMV).

Conductor Rail Measurement System

The CRMS system takes a number of measurements including measurements of conductor rail head wear, height and gauge to the running rail, facing/trailing ramp angles and gaps etc. One of the key measurements derived from the data recorded by the CRMS is conductor rail head wear as this is used for the planning and prioritisation of conductor rail renewals.

CRMS provides dimensional information and high-resolution profiles of both running rail and third rail at track speeds. The CRMS sensor heads are mounted under the vehicle, in pairs over the left and right rails as shown in Figure 3 & 4. Each sensor head generates a momentary plane of laser light (Class 3B) that illuminates the cross section of each conductor/running rail pair. Electronic cameras image the illuminated rail outlines. A computer is then used to analyse the video images and to perform the required measurements in real time.

The CRMS system takes a number of measurements including measurements of conductor rail head wear, height and gauge to the running rail, facing/trailing ramp angles and gaps etc. One of the key measurements derived from the data recorded by the CRMS is conductor rail head wear as this is used for the planning and prioritisation of conductor rail renewals.

CRMS provides dimensional information and high-resolution profiles of both running rail and third rail at track speeds. The CRMS sensor heads are mounted under the vehicle, in pairs over the left and right rails as shown in Figure 3 & 4. Each sensor head generates a momentary plane of laser light (Class 3B) that illuminates the cross section of each conductor/running rail pair. Electronic cameras image the illuminated rail outlines. A computer is then used to analyse the video images and to perform the required measurements in real time.

Measurements are made every 9” along the track. The CRMS has been designed with a maximum operating speed of 100mph and determines the following parameters in real time:

 

  • Conductor Rail Type
  • Wear - Vertical wear (mm). This is calculated by subtracting the top of the conductor rail from the height of the conductor rail template
  • Gauge - Horizontal distance (mm) from the gauge point on the running rail to the gauge point on the conductor rail.
  • Ctr Gauge - Horizontal distance (mm) from the gauge point on the running rail to the centre line point on the conductor rail.
  • Height - Vertical distance (mm) from the top of the running rail to the top of the conductor rail
  • Temperature - Conductor rail temperature
  • Ramp Space - Distance between start and end of ramp (mm) to the nearest record
  • Ramp Angle - Absolute value of the reciprocal of the conductor rail ramp slope. The slope is the best fit line obtained from the coordinates of the top of the profile of four consecutive samples proceeding or following a gap. The value is expressed in radians, positive for the entry/facing ramp, and negative for the exit/trailing ramp.