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Walking stick navigator for position determination

  • US 20030114984A1
  • Filed: 11/29/2002
  • Published: 06/19/2003
  • Est. Priority Date: 12/03/2001
  • Status: Active Grant
First Claim
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1. A walking stick navigator (WSN) apparatus and process comprising:

  • a staff assembly having a lower end and a top end, the staff assembly being carried by a surveyor moving along a path to be surveyed, the surveyor positioning the lower end of the staff assembly at a stationary point on the ground at the start of a stride, and pivoting the staff assembly around the stationary point substantially in the direction of surveyor movement, the surveyor lifting the staff assembly and repositioning the lower end of the staff assembly to a further stationary point in the direction of surveyor movement at the conclusion of the stride, the sequence being repeated with each successive stride interval, an Aided Inertial Navigation System (AINS), coupled to and aligned on the staff assembly, the AINS system providing output signals comprising position, velocity and platform angle signals, a switch means coupled to the lower end of the staff assembly for providing a stationary interval signals characterizing each successive stationary interval, and an input process coupled to be responsive to AINS output signals and to the stationary interval signals for providing at least one aiding input to the AINS for each successive stationary interval.

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