公开(公告)号：EP2236320B1

公开(公告)日：2011-11-23

申请号：EP10006328.8

申请日：2004-08-24

Applicant: ROSEMOUNT AEROSPACE INC.

Inventor： Buenz, Mark J. ,  Norlien, John A. ,  Kunik, William G. ,  Williams, Wade W. ,  Myhre, Douglas C.

IPC: B60C23/04

CPC classification number: G01P3/44 ,  B60C23/0428 ,  B60C23/043 ,  B60C2200/02 ,  G01P3/48

公开(公告)号：EP2236320A1

公开(公告)日：2010-10-06

申请号：EP10006328.8

申请日：2004-08-24

Applicant: ROSEMOUNT AEROSPACE INC.

Inventor： Buenz, Mark J. ,  Norlien, John A. ,  Kunik, William G. ,  Williams, Wade W. ,  Myhre, Douglas C.

IPC: B60C23/04

CPC classification number: G01P3/44 ,  B60C23/0428 ,  B60C23/043 ,  B60C2200/02 ,  G01P3/48

Abstract: A wireless tire pressure and wheel speed sensing system for an aircraft is provided. The system comprises the following components.
A resonant circuit is mounted to a wheel of the aircraft for monitoring the pressure of a tire mounted to said wheel. The resonant circuit comprises a wire loop of a predetermined inductance.
An interrogating circuit is magnetically coupleable to said resonant circuit and is operative to induce magnetically a variable frequency current in the wire loop of said resonant circuit. The resonant circuit generates a corresponding variable frequency electric field in response to said induced current. The variable frequency electric field includes a resonant frequency commensurate with the pressure of said tire.
A magnetic field altering apparatus is provided for alternating the magnetic coupling between said wire loop and said interrogating circuit to cause a rate of amplitude modulations of said variable frequency electric field commensurate with said wheel speed.
A receiving circuit E-field is coupleable to said resonant circuit and operative to receive the amplitude modulated variable frequency electric field of said resonant circuit and to generate a signal representative thereof.
A first processing circuit is coupled to said receiving circuit for processing the signal to generate a pressure reading of said tire based on the resonant frequency thereof.
A second processing circuit is coupled to said receiving circuit for processing said signal to generate a wheel speed reading based on the rate of amplitude modulations thereof.