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Meter data gathering and transmission system

  • US 4,782,341 A
  • Filed: 04/04/1986
  • Issued: 11/01/1988
  • Est. Priority Date: 07/01/1983
  • Status: Expired due to Term
First Claim
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1. A bi-directional signal transmission system for outputting data signals and for receiving a power and control signal comprising a series of signal bursts occurring at a first, relatively low frequency, each signal burst comprising a plurality of pulses occurring at a second, relatively high frequency and an envelope, said system comprising:

  • (a) inductive coupling means for inputting said power and control signal in a first direction through said inductive coupling means and for outputting said data signals in a second, opposite direction through said inductive coupling means;

    (b) envelope detecting means coupled to said inductive coupling means for receiving said power and control signal and responsive to said envelopes for providing corresponding control signals of said first low frequency;

    (c) data processing means coupled to receive said control signals from said envelope detecting means for effecting data processing to provide said data signals; and

    (d) means coupled to said inductive coupling means and to said data processing means and responsive to each of said control signals for outputting said data signals in said second direction through said inductive coupling means at a time between the occurrences of said signal bursts.

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