×

Apparatus for contactless energy and data transmission for single coil and two-coil systems

  • US 5,473,323 A
  • Filed: 11/30/1993
  • Issued: 12/05/1995
  • Est. Priority Date: 11/30/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for contactless data and energy transmission between an immobile microstation having a coil pair and further having a means for providing an oscillating clock signal and a mobile microunit having either one or two coils, comprising the following steps:

  • a) receiving the clock signal by a phase modulator in the microstation and generating from the clock signal, a first and a second synchronous oscillating signals having the same frequency and phase-shifted by 90°

    relative to each other by the phase modulator in said microstation;

    b) assigning every phase switching of the synchronous oscillating signals to a logical signal level "high" or "low" of a data signal to be received by the phase modulator and transmitted to a microunit;

    c) switching said phase-shifted synchronous oscillating signals by |90°

    | by said phase modulator in a defined fashion depending on said data signal to be transmitted to a microunit, such that the phases of said synchronous oscillating signals do not oppositely cross during said switching and also do not become equiphase;

    d) controlling a first amplifier and a first transformer coil of said coil pair on the microstation by said first synchronous oscillating signal and controlling a second amplifier and a second transformer coil of said coil pair on the microstation by said second synchronous oscillating signal so that said transformer coils generate respective first and second magnetic energy field signals having phase modulated information, and further coupling said magnetic energy field signals onto the either one or two coils of the microunit;

    e) demodulating the phase modulated data and outputting data in the microunit;

    f) transmitting data from said mobile microunit to said microstation by utilizing amplitude modulation caused by a load change at said one or two coils of said microunit, whereby said load change of said one or two coils of the mobile microunit can be identified by the amplitude modulation induced in the signal at the coupled one or both coils of said microstation;

    g) summing with respect to time, the first and second signals of the two coils of the microstation to form a summation signal;

    h) demodulating said summation signal by amplitude demodulation; and

    i) outputing a logical digital data signal level.

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