Geotab Incorporated

Hatch Ltd.

Matthew Douglas Brown

Michael Morgan Campbell

Matthew Gorczyca

Patrick Henry McGinn

Mark James Mitchell

Michael Morgan

Patrick Henry Mcginn

A method, device, and system for detecting a current leak in a traction power rail. Magnetic or electrical properties of the rail are measured. The measurements are performed using a rail instrument that senses the properties around the rail at various times while the instrument is being moved down the rail, such as using a cart or train. The rail instrument may be a flux concentrator or open Rogowski coil. The locations of the rail, about which the readings are taken by the rail instrument, may be determined and correlated with the measurements themselves. The method may comprise measuring the magnetic field of the rail along a length of the rail, and identifying a leak based on differences between the magnetic field measurements. The system may comprise a cart comprising the rail instrument and a location instrument.

Device, system and method for detecting leakage current for traction power system

Described herein are antenna configurations that, in some embodiments, may be advantageously tuned to achieve desired electromagnetic performance over multiple resonant frequencies by providing control, in the design process, over some or all of the desired resonant frequencies. Such antenna configurations, in some embodiments, may be configured to achieve a large frequency bandwidth in a static physical layout, without necessarily resorting to a reconfigurable feed path.

Multi-band antenna device and tuning techniques

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Oakville, Canada

Matthew Douglas Brown