Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1979-11-13
1981-11-10
Buczinski, S. C.
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
250202, 340 27NA, 356 5, 356141, 358103, 358109, 364456, G01B 1126, G05B 100
Patent
active
042994837
ABSTRACT:
An airplane or other vehicle is to be used for repeated traverses over an assigned area successively in respective different ones of a plurality of parallel paths displaced laterally one from another. Path alignment apparatus carried by the vehicle cooperates with delivery means that dispenses a material along each of the paths in a swath of predetermined width. The material includes an agent that presents characteristic radiation at a predetermined frequency. A sensing means is oriented to view the path of approach of the vehicle for detecting the radiation and developing a discriminated signal which distinguishes between presence and absence of the radiation. Developed by range-finding means is a distance signal that represents location of the vehicle relative to the location of the path being approached. Also included are indication means for response to the discriminated signal and the distance signal in order to develop an information signal that represents the degree of departure as between a longitudinal edge margin of a previously dispensed swath and a new swath being approached by the vehicle. As a result, it is possible for the operator of the vehicle to cause the dispensing of the material in successive swaths with a minimum of either overlap or underlap as between successively displaced swaths.
REFERENCES:
patent: 3043908 (1962-07-01), Madsen
patent: 3254156 (1966-05-01), Kegelman
patent: 3705955 (1972-12-01), Assouline et al.
patent: 4019060 (1977-04-01), Woodman
patent: 4049961 (1977-09-01), Marcy
patent: 4118733 (1978-10-01), Sarson et al.
NASA Tech. Brief 68-10311, Aug. 1968.
Bennet, II William S.
Grove Thomas C.
Buczinski S. C.
Drake Hugh H.
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