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Guidance control system for self-propelled mobile sprinkler irrigation systems

  • US 4,099,669 A
  • Filed: 12/06/1976
  • Issued: 07/11/1978
  • Est. Priority Date: 12/06/1976
  • Status: Expired due to Term
First Claim
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1. A guidance system for a self-propelled sprinkler irrigation system in which a supply pipe, carrying a plurality of sprinklers, is coupled at one end to a source of irrigation water under pressure and is supported above the ground by a plurality of spaced carriages each having propulsion means, said guidance system comprising:

  • means coupled to the pipe for generating a generally vertical plane of laser produced energy;

    means for moving the laser plane forwardly relative to the carriages;

    detecting means on each of the spaced carriages supporting the supply pipe and positioned to intercept said laser plane, said detecting means producing an electrical intercept signal indicative of interception of said laser plane; and

    circuit means coupled to said detecting means and to the carriage propulsion means for energizing said propulsion means in response to an intercept signal from said detecting names to maintain the carriage in general alignment with the laser plane.

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