Safety monitoring for cables transmitting data and power
In one embodiment, a method generally comprises monitoring real-time electrical data for Power Sourcing Equipment (PSE) transmitting power over a cable to a Powered Device (PD), and identifying changes in the real-time electrical data indicating strain on one or more wires in the cable due to stretching in the one or more wires.
1. A method comprising:
monitoring real-time electrical data for Power Sourcing Equipment (PSE) transmitting power over a cable to a Powered Device (PD); and
identifying changes in the real-time electrical data indicating strain on one or more wires in the cable due to stretching in said one or more wires;
wherein said stretching comprises a localized reduction in diameter of said one or more wires along a vertical portion of the cable.
2. The method of claim 1 further comprising using a time domain reflectometer to identify variations in impedance over a length of the cable to indicate said stretching in said one or more wires.
3. The method of claim 1 further comprising using said real-time electrical data to calculate thermal characteristics for the cable and periodically updating the thermal characteristics based on the monitored data.
4. The method of claim 1 wherein the power comprises multi-phase pulse power and the monitored data comprises voltage and current for each phase.
5. The method of claim 1 further comprising identifying a wire gauge of the cable based on the data.
6. The method of claim 1 further comprising measuring cable length using a time domain reflectometer, wherein the cable length is used to calculate a wire gauge.
7. The method of claim 1 further comprising measuring a high frequency signal at a receiver at the PD to indicate said stretching.
8. The method of claim 1 further comprising identifying a percentage of stretch over a specified threshold level and sending a notification.
9. A method comprising:
monitoring real-time electrical data for Power Sourcing Equipment (PSE) transmitting power over a cable to a Powered Device (PD);
identifying changes in the real-time electrical data indicating strain on one or more wires in the cable due to stretching in said one or more wires; and
detecting an adjacent cable by measuring cross-talk between wires in the cables.
10. The method of claim 9 wherein the power comprises pulse power and wherein cross-talk is measured during a transition of a pulse of the pulse power.
11. The method of claim 9 further comprising measuring cable length using a time domain reflectometer, wherein the cable length is used to calculate a wire gauge.
12. The method of claim 9 further comprising measuring a high frequency signal at a receiver at the PD to indicate said stretching.
13. A method comprising:
monitoring real-time electrical data for Power Sourcing Equipment (PSE) transmitting power over a cable to a Powered Device (PD);
identifying changes in the real-time electrical data indicating strain on one or more wires in the cable due to stretching in said one or more wires; and
identifying a thermal rise at the cable and limiting power output at a port of the PSE connected to the cable.
14. The method of claim 13 wherein said stretching comprises a localized reduction in diameter of said one or more wires along a vertical portion of the cable.
15. The method of claim 13 further comprising measuring a high frequency signal at a receiver at the PD to indicate said stretching.
16. The method of claim 13 further comprising identifying a percentage of stretch over a specified threshold level and sending a notification.
17. The method of claim 13 further comprising detecting an adjacent cable by measuring cross-talk between wires in the cables.
18. A method comprising:
monitoring real-time electrical data for Power Sourcing Equipment (PSE) transmitting power over a cable to a Powered Device (PD);
identifying changes in the real-time electrical data indicating strain on one or more wires in the cable due to stretching in said one or more wires; and
identifying a percentage of stretch over a specified threshold level and limiting power output at a port of the PSE connected to the cable.
19. The method of claim 18 further comprising monitoring said strain on said one or more wires and identifying a cable health based on changes in said monitored strain and thermal characteristics.
20. The method of claim 18 further comprising identifying an adjacent cable and calculating a thermal rise on the cable based at least in part on said identified adjacent cable.