System for measuring vector coordinates

Details System for measuring vector coordinates System for measuring vector coordinates

1990-10-15

1993-09-14

Black, Thomas G.

Boots, shoes, and leggings

33 1LE, 33288, G01B 525

Patent

active

052455556

ABSTRACT:
A system for measuring coordinates of a vector in x,y,z Cartesian space includes a flexible non-elastic string spirally mounted upon a selectably positively and negatively rotatably tensioned drum, the drum having an axle of rotation and being positively rotatable as a function of positive increments of length of the string. Mounted co-integrally with the drum axle is a translational measurement encoder for converting rotation of the drum axle into a signal output corresponding to positive increments of extension of length of the string. Further provided is an assembly for defining an origin of the vector to be measured, the assembly including an origin member having an aperture therein for slidable accommodation of the string. First and second encoders are provided for measurement of angle-related information to digital electronic computing means which algorithmically derive the x,y,z coordinates of the measured vector from signal outputs corresponding to measured increments of length of the string and to angular movements of the string relative to the Cartesian reference axes.

REFERENCES:
patent: 4249314 (1981-02-01), Beck
patent: 4473954 (1984-10-01), Vilches
patent: 4703443 (1987-10-01), Moriyasu
patent: 4831561 (1989-05-01), Utsumi
patent: 4841460 (1989-06-01), Dewar et al.
patent: 4928175 (1990-05-01), Haggren
patent: 4961155 (1990-10-01), Ozeki et al.
patent: 5193288 (1993-03-01), Stifnell

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