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System and method for determining at least one parameter of at least one rotating member by means of reference and speed signals

  • US 7,271,733 B2
  • Filed: 11/16/2004
  • Issued: 09/18/2007
  • Est. Priority Date: 11/21/2003
  • Status: Expired due to Fees
First Claim
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1. A system for determining at least one parameter of at least one member (1) rotating with respect to a fixed structure (2), said system comprising, for each rotating member (1), an assembly comprising:

  • a transponder (3) rotationally fixed to the rotating member (1), the transponder being able to measure the parameter or parameters to be determined;

    a coder (5) rotationally fixed to the rotating member (1), the coder comprising a reference singularity whose angular position is indexed with respect to the angular position of the transponder (3) on the rotating member (1);

    a sensor (6) fixed to the fixed structure (2), the sensor being disposed opposite to and at a reading distance from the coder (5), the sensor being able to deliver a rotation pulse signal comprising a reference pulse corresponding to the detection of the reference singularity;

    a detection device (4) for detecting the parameter or parameters issuing from the transponder (3), the device being fixed to the fixed structure (2) and comprising a communication means able to send an excitation signal to the transponder (3) and to receive the measurement or measurements, said communication means having a transmission/reception cone;

    a device for measuring the speed of rotation of the rotating member (1);

    said system also comprising;

    an activation device (7) which is connected to each sensor (6), to each detection device (4) and to each speed measurement device, the activation device being able, when a reference pulse issuing from the sensor (6) of an assembly is recorded, to activate the assembly detection device (4) at a moment which is a function of the indexed position of the transponder (3) and of the measured speed, so that the transponder (3) of the assembly is in the transmission/reception cone of the communication means of the detection device.

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