Method for determining a status of a track section of a railroad; associated apparatus and non-transitory computer readable medium
A method is for determining a status of a track section of a railroad. Each end of the track section is connected to a respective detector. One of the two detectors transmits a current along the rails of the track section towards the other detector and receives a current transmitted along the rails of the track section from the other detector. The track section is further equipped with a computer in communication with the two detectors. The computer calculates an instant value of the status of the track section as a function of an instant vector based on a measure of an intensity of the current transmitted by a first of the detectors as measured by the first detector (Txl 1 ), a measure of an intensity of the current received by the first detector as measured by the first detector (Rxl 1 ) and a measure of an intensity of the current transmitted by the second detector as measured by the second detector (Txl 2 ).
1. A method for determining a status of a track section of a railroad, the track section comprising first and second ends, a first rail and a second rail, wherein the first end and the second end are electrically connected to a first detector and a second detector, respectively, and wherein the first and second detectors are in communication with at least one computer, the method comprising:
by the first detector, transmitting a first current along the first rail of the track section towards the second detector,
by the second detector, receiving the first current and transmitting a second current along the second rail of the track section toward the first detector,
by the first detector, receiving the second current,
by the at least one computer, calculating an instant value of the status of the track section as a function of an instant vector of measures that comprises:
a first coordinate corresponding to a measure of an intensity of the first current as measured by the first detector;
a second coordinate corresponding to a measure of an intensity of the second current as measured by the first detector; and
a third coordinate corresponding to a measure of an intensity of the second current as measured by the second detector.
2. The method according to claim 1 , wherein the instant vector of measures comprises a fourth coordinate corresponding to a measure of an intensity of the first current received as measured by the second detector.
3. The method according to claim 1 , wherein the status of the track section is an occupancy status whose value is selected between a first value corresponding to a non occupied track section and a second value corresponding to an occupied track section, and/or an operative status whose value is selected between a third value corresponding to a non faulty track section and a fourth value corresponding to a faulty track section.
4. The method according to claim 1 , wherein the at least one computer being integrated with the first detector in a first monitoring system, the second detector communicates to the at least one computer by way of the transmission of a communication signal along the rails of the track section towards the first detector.
5. The method according to claim 1 , wherein the at least one computer calculates the instant value of the status of a track section by:
reading a data file defining a plurality of regions in a space of measures, each dimension of the space of measures being associated with the corresponding coordinate of the instant vector of measures, each region of the plurality of regions being associated with the value of the status of the track section;
locating the instant vector of measures in the space of measures; and,
when the instant vector of measures is located inside a specific region of the plurality of regions, considering that the instant value of the status of the track section is equal to the value of the status of the track section with which the specific region is associated.
6. The method according to claim 5 , wherein the data file is obtained by an offline preprocessing phase which comprises the steps of:
running a simulation modeling an electrical behavior of the track section in different situations in order to generate simulated vectors of measures;
labelling each simulated vectors of measures with the value of the status of the track section corresponding to the situation simulated;
delimiting the plurality of regions in the space of measures, one particular region of the plurality of regions regrouping simulated vectors of measures labelled with a same value of the status of the track section, said same value of the status of the track section being used to identify said particular region.
7. The method according to claim 6 , wherein, when two regions of the plurality of regions are overlapping one with the other, the method further comprises the step of setting a threshold on at least one dimension of the space of measures in order to delimit two regions that are separated one from the other.
8. The method according to claim 1 , wherein the track section is electrically insulated from adjacent track sections.
9. A non-transitory computer readable medium comprising instructions stored thereon, the instructions, when executed by the computer, cause the computer to execute the method according to claim 1 .
10. An apparatus for determining a status of a track section of a railroad, wherein the track section comprises first and second ends, a first rail, and a second rail, the apparatus comprising:
at least one computer, and
a first and a second detectors,
wherein the first and second detectors are in communication with the at least one computer,
wherein the first detector and the second detector are electrically connected to the first end and the second end, respectively,
wherein the first detector is configured to transmit a first current along the first rail of the track section towards the second detector and the second detector is configured to receive the first current,
wherein the second detector is configured to transmit a second current along the second rail towards the first detector and the first detector is configured to receive the second current, and
wherein the at least one computer is configured to calculate an instant value of the status of the track section as a function of an instant vector of measures that comprises:
a first coordinate corresponding to a measure of an intensity of the first current as measured by the first detector;
a second coordinate corresponding to a measure of an intensity of the second current as measured by the first detector; and
a third coordinate corresponding to a measure of an intensity of the second current as measured by the second detector.
11. The apparatus according to claim 10 , wherein a communication link is established between the first and second detectors.
12. The apparatus according to claim 11 , wherein the communication link is a power line communication link along the rails of the track section.
13. The apparatus according to claim 10 , wherein the track section is electrically insulated from adjacent track sections.