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Transmission method for variable measured values from vehicle wheels utilizing ambient temperature compensation

  • US 4,567,459 A
  • Filed: 04/05/1982
  • Issued: 01/28/1986
  • Est. Priority Date: 08/05/1980
  • Status: Expired due to Term
First Claim
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1. In combination, a system for sending an information signal indicative of variable measured values from wheels of a vehicle, wherein energy is transmitted from a primary coil to a secondary coil mounted concentrically on at least one of said wheels during excitation of said primary coil mounted external of said wheels and fixedly connected with the vehicle, and said information signal, which is a function of the output signal of a sensor means located in said at least one of said wheels, is fed back from said secondary coil to the primary coil,the improvement comprising compensation means responsive to said primary coil for temperature-compensating said information signal, said compensation means includingambient temperature sensor means located external of said wheels for producing a set value indicative of ambient temperature about said vehicle;

  • andan evaluation circuit for comparing the information signal with said set value whereby to correct representations of information signal due to changes in temperature.

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