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Luffing angle measurement system

  • US 6,473,715 B1
  • Filed: 12/04/1998
  • Issued: 10/29/2002
  • Est. Priority Date: 12/05/1997
  • Status: Expired due to Term
First Claim
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1. A luffing angle measurement system, comprising:

  • a non-contact distance measuring device mounted on a nose section of a first boom, transmitting electromagnetic energy towards a second boom pivotally connected to the first boom, receiving electromagnetic energy reflected from the second boom, and measuring a distance to the second boom pivotally connected to the first boom, the non-contact distance measuring device mounted to the nose section of the first boom such that as a luffing angle between the second boom and the first boom increases, the measured distance output by the non-contact distance measuring device increases; and

    a controller converting the measured distance into a luffing angle.

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