×

Elements necessary for the excitation and the monitoring of wheel modules in a system for monitoring the wheels of a vehicle

  • US 5,029,468 A
  • Filed: 07/12/1990
  • Issued: 07/09/1991
  • Est. Priority Date: 12/16/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. An excitaion and monitoring device for monitoring the wheels of a vehicle, said device comprising:

  • a module on each wheel for accumulating electric energy from the transmission of electrical current by inductive coupling with the vehicle, for sensing parameters on the wheel, for coding the values of the observed parameters and for transmitting by inductive coupling a signal including the coded values;

    a wheel antenna attached coaxially to each wheel and connected to one of said modules;

    an inspection antenna for each wheel being attached to a non-moving part of the vehicle so that an inductive coupling with the corresponding wheel antenna is approximately constant;

    a unit for each wheel connected to one of said inspection antennas for producing the electrical current transmitted by inductive coupling and for shaping a signal received from said inspection antenna which is transmitted from said module through said wheel antenna in response to the electrical current being transmitted;

    means for controlling said units to be successively actuated so that the wheels are successively monitored and so that the monitoring of a first wheel will be simultaneous with the excitation of a module of another wheel which is to be monitored next; and

    means for processing the signal to determine said values of the parameters.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×