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Apparatus for surveying paved surface

  • US 3,882,268 A
  • Filed: 07/02/1973
  • Issued: 05/06/1975
  • Est. Priority Date: 07/03/1972
  • Status: Expired due to Term
First Claim
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1. An apparatus for surveying a paved surface having marginal edges separating the paved surface from the bordering unpaved surface, said apparatus comprising a vehicle, a television camera on said vehicle for viewing the vehicle and the paved and unpaved surfaces, a television receiver for receiving a signal from the camera and includng an image screen on which an image of the vehicle, the paved surface inclusive of its marginal edges, and the unpaved surface is received, a scale on said screen including a central mark and two lateral marks, paint applicator means on said vehicle, the arrangement of said vehicle, camera and marks being such that said marginal edges are aligned with said lateral marks and said applicator means with said central mark, and automatic control means operatively associated with said screen for detecting misalignment of the lateral marks and said marginal edges for correction of such misalignment and including photoelectric sensors adjacent said lateral marks for detecting shifting of the marginal edges relative to said lateral marks due to differences in brightness between the paved and unpaved surfaces.

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