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Infrared remote control for soil compacting devices

  • US 5,450,068 A
  • Filed: 06/24/1993
  • Issued: 09/12/1995
  • Est. Priority Date: 07/03/1992
  • Status: Expired due to Term
First Claim
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1. A method of remote-controlling a self-propelled soil compacting device, said method comprising the steps of:

  • emitting an electromagnetic control radiation in the infrared range from a sending unit that is separate from the soil compacting device;

    modulating the electromagnetic control radiation to produce a modulated electromagnetic control radiation in correspondence to an electric control signal to be transmitted to the soil compacting device;

    receiving the electromagnetic control radiation at a receiving unit provided at the soil compacting device;

    generating the electric control signal corresponding to the modulated electromagnetic control radiation for controlling the soil compacting device;

    sending alternatingly with the electromagnetic control radiation an electromagnetic short range radiation in the infrared range having an intensity that is substantially smaller than the intensity of the electromagnetic control radiation;

    coding into the electromagnetic control radiation a first address code and into the electromagnetic short range radiation a second address code, wherein the first and the second address codes differ from one another and are decoded within the receiving unit;

    directing the electromagnetic control radiation according to the first address code into a first channel and the electromagnetic short range radiation according to the second address code into a second channel, wherein the first channel is blocked for the electromagnetic short range radiation and the second channel is blocked for the electromagnetic control radiation; and

    blocking with the electromagnetic short range radiation the release of predetermined control signals within the receiving unit, when the electromagnetic short range radiation is received within the receiving unit with an intensity that is above a predetermined threshold.

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