Eldec Corporation

Mark Finefrock

Jeff Lamping

Jeffrey J Green

Bradley Smith

Jonathan Lumb

Cold check gas pressure readings for the landing gear tires of an aircraft are obtained automatically during normal operation of the aircraft. The automated system (S, e.g.) includes monitoring aircraft data to determine that the aircraft is at rest on the ground (), and electronically monitoring the tire pressure (). When predetermined cold check conditions have been met; the tire pressure values are automatically stored with a timestamp () for later access by a user.

Tire pressure cold check system

The aircraft tire pressure loop link is formed of first and second single metal loops connected by parallel spaced apart metal shafts, and provides for coupling a magnetic field between a wheel hub coil and a tire pressure sensor coil to provide electromagnetic communication between a control unit connect to the wheel hub coil and a tire pressure sensor connected to the tire pressure sensor coil. The current induced in the first single metal loop travels the distance from the edge of the wheel axle coil to the periphery of the of the wheel rim to the second single metal loop, which generates the flux in the tire pressure sensor receiver coil necessary to power the tire pressure sensor.

Aircraft tire pressure loop link

A passive RFID transponder sensor system includes a sensor assembly having a focused field transponder antenna with a highly magnetically permeable transponder antenna stem, and a reader antenna with an electrical reader coil generating a magnetic field having magnetic flux extending between the reader antenna and a sensor assembly. The electrical transponder coil and the electrical reader coil are coupled by the magnetic field, so that information can be transferred to and from the sensor assembly through the magnetic field by which the electrical transponder coil and the electrical reader coil are coupled.

Focused field antenna for passive RFID tire pressure sensor tranponder

Focused field antenna for passive RFID tire pressure sensor transponder

The aircraft tire pressure loop link is formed of first and second single metal loops connected by parallel spaced apart metal shafts, and provides for coupling a magnetic field between a wheel hub coil and a tire pressure sensor coil to provide electromagnetic communication between a control unit connect to the wheel hub coil and a tire pressure sensor connected to the tire pressure sensor coil; the current induced in the first single metal loop travels the distance from the edge of the wheel axle coil to the periphery of the of the wheel rim to the second single metal loop, which generates the flux in the tire pressure sensor receiver coil necessary to power the tire pressure sensor.

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Lake Stevens, WA, United States of America

Mark Finefrock