Automatic readout micrometer

Details Automatic readout micrometer Automatic readout micrometer

1979-08-04

1982-03-23

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

33180R, G01B 1104

Patent

active

043205771

ABSTRACT:
A measuring system is disclosed for surveying and very accurately positioning objects with respect to a reference line. A principal use of this surveying system is for accurately aligning the electromagnets which direct a particle beam emitted from a particle accelerator. Prior art surveying systems require highly skilled surveyors. Prior art systems include, for example, optical surveying systems which are susceptible to operator reading errors, and celestial navigation-type surveying systems, with their inherent complexities. The present invention provides an automatic readout micrometer which can very accurately measure distances. The invention has a simplicity of operation which practically eliminates the possibilities of operator optical reading error, owning to the elimination of traditional optical alignments for making measurements. The invention has an extendable arm which carries a laser surveying target. The extendable arm can be continuously positioned over its entire length of travel by either a coarse or fine adjustment without having the fine adjustment outrun the coarse adjustment until a reference laser beam is centered on the target as indicated by a digital readout. The length of the micrometer can then be accurately and automatically read by a computer and compared with a standardized set of alignment measurements. Due to its construction, the micrometer eliminates any errors due to temperature changes when the system is operated within a standard operating temperature range.

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"A Precision Surveying System for PEP", by J. Gunn et al., 3/16/77, U.S. Energy Research and Development Adm.
"Spectra Physics", Laser Level & Laser Rod. by Spectra-Physics, Mountain View, Ca.

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