Methods and systems for alerting a user to the presence of a fault in an electromechanical system in a railway infrastructure

1. A computer-implemented method for alerting a user to the presence of a fault in an electromechanical system in a railway infrastructure, the method comprising:

receiving electrical usage data indicative of the value of an electrical usage parameter associated with the electromechanical system;

receiving temperature data indicative of the present temperature of the electromechanical system;

calibrating the received electrical usage data using the received temperature data and a predetermined relationship between the electrical usage parameter and the temperature to obtain a calibrated measure of the electrical usage parameter, the calibration comprising:

identifying a baseline temperature at which a threshold for the electrical usage parameter is set, said threshold being such as to indicate the presence of a fault in the electromechanical system, and

using said relationship, together with the received electrical usage data and the received temperature data, to determine a value for the electrical usage parameter that the system would exhibit in the event that the temperature of the environment were at the baseline temperature; and

determining whether the calibrated measure of the electrical usage parameter is above the threshold

and if so, issuing an alert to indicate the presence of the fault.

2. A computer implemented method according to claim 1 , wherein the predetermined relationship defines the change in the electrical usage parameter as a linear function of the temperature.

3. A computer implemented method according to claim 1 , wherein the electrical usage parameter is one of an electrical current being drawn by the electromechanical system, the electrical power being transferred by the electromechanical system, and the voltage across the electromechanical system.

4. A computer implemented method according to claim 1 , wherein the predetermined relationship is obtained by comparing measurements of the electrical usage parameter with measurements of temperature during a period in which the electromechanical system is deemed to be functioning within acceptable tolerances.

5. A computer implemented method according to claim 1 , wherein the electromechanical system is a point switch machine.

6. A computer-implemented method according to claim 1 , wherein the electrical usage data is indicative of the average electrical current drawn by a motor of the electromechanical system during an operation of the motor.

7. A computer readable medium comprising computer executable instructions that when executed by a computer will cause the computer to carry out a method according to claim 1 .

8. A non-transitory computer readable storage medium comprising computer executable instructions that when executed by a computer will cause the computer to carry out a method according to claim 1 .