NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Design of a laser system for instantaneous location of a longwall shearerCalculations and measurements for the design of a laser system for instantaneous location of a longwall shearer were made. The designs determine shearer location to approximately one foot. The roll, pitch, and yaw angles of the shearer track are determined to approximately two degrees. The first technique uses the water target system. A single silicon sensor system and three gallium arsenide laser beams are used in this technique. The second technique is based on an arrangement similar to that employed in aircraft omnidirectional position finding. The angle between two points is determined by combining information in an onmidirectional flash with a scanned, narrow beam beacon. It is concluded that this approach maximizes the signal levels.
Document ID
19810023064
Document Type
Contractor Report (CR)
Authors
Stein, R. (Adjunct Systems, Inc. Huntsville, AL, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1981
Subject Category
EARTH RESOURCES AND REMOTE SENSING
Report/Patent Number
NASA-CR-161846
AS03040R1
Funding Number(s)
CONTRACT_GRANT: NAS8-34185
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 19810023064.pdf STI