The process by which an item is adjusted into an ideal design position.
Alignment Lug
A round metal disk attached to a component that is known with respect to
a given point or location within the component. Many TeV components have
these installed. See picture
-B-
Bar Code Rod
Any of various length rods having a barcode scale in a vertical direction
typically used for doing level runs. 2 meter and 3 meter lengths are
commonly us ed at Fermilab.
See picture
Brass
Typically a floor installed horizontal reference mark. Approximately
1” in diameter screwed into an anchor that is drilled into a concret
floor, wall or ceiling. A small punch mark is installed in the brass at
the desired location. See picture
-C-
Crew Chief
The person in charge of other individual survey party members.
-D-
Digital Level
An instrument used to do work along a vertical plane, with gravity as the
reference, reading barcode scales or rods off of the points or surfaces of
interest.
See picture
Dijak Bolt
A bolt modified in design to accept various ¼” pin style fixtures
used for optical tooling alignment as well as laser tracker alignment.
See picture
Deep Rod Monument (DRM)
DRM primarily used for vertical reference, this monument is a
series of aluminum rods screwed together and driven into the earth unto
refusal. The uppermost end of the rod is then measured with respect to a
vertical datum in the area. This type of monument is installed as an
outdoor, as well as an indoor means of vertical control.
See picture
-F-
Fiducial
A device or mark that has been measured, and is known with respect to some
other design point or location.
-G-
Geodesy
The geologic science of the size and shape of the earth
-K-
Kyjak Bolt
A hybrid of the Dijak Bolt having a concave surface, with a magnet to
hold a 1.5” sphere.
See picture
-L-
Laser Tracker (Tracker)
A Laser Tracker is a device that makes 3-D measurements, capable of very
high accuracy, and is used in setting up control networks,
measuring / referencing components, and final alignment of components in
the beam lines. Trackers use a laser distance meter, two precision
encoders and sophisticated proprietary software to calculate, store and
display the 3-D position of a mirrored target (SMR or BMR or Retro probe).
A beam steering system senses movement of the mirrored target and directs
two servomotors to track the target. The tracker follows the mirrored
target over features, updating the position at a rate of 1,000 times
per second. The abundance of data collected yields good statistical
redundancy, permitting excellent accuracy and repeatability.
See picture
-M-
Mekometer (Meko)
"ME5000" distance measuring instrument design by Kern, a Switzerland
based instrument company.
See picture
Metrology
The science that deals with measurement. A system of measurement.
Meterology (Mets)
Mets is short for "meteorology" information. Temperature, humidity,
and barometric pressure affect different elements and need to be
considered for accurate measurement results.
-N-
N3 Level
An optical instrument used to measure a point along a vertical plane with
gravity as a reference.
See picture
-O-
Optical square
A way to set up instruments, where the lines of sight are parallel, and
perpendicular to each other.
See picture
SMR also known as a Ball Mounted Reflector (BMR)
used with a laser-producing instrument to measure distance and angles from
a known reference network of control points.
See picture
-T-
Theodolite
A surveying instrument used to measure horizontal and vertical angles
with a small telescope that can move in horizontal and vertical planes.
Tierod
I device typically installed in a concrete wall that is used as a known
reference point for a vertical measurement. These also have a horizontal,
and stationing value that can also be used.
See picture
Transit
An instrument or tool used for measurement, similar to a theodolite, that
measures horizontal and vertical angles.
-V-
V-Stars
A system of measurement designed by "Geodetic Services" in industrial
photogrammetry. This system uses digital camera, specialized software,
and light reflecting targeting to make measurements using triangulation.
See picture
-W-
Wyteface scale
A "scale" marked off with inches, and tenths of inches, having a
white face, with black markings, on hardened tool steel. These come in
3", 10" 20" and 40" lengths. Also have been cutoff to desired
length for specific jobs. These are a valuable component of the
optical tooling process.
See picture
-X-
X
The horizontal component value of a point.
-Y-
Y
The distance along a line, sometimes known as stationing along the beam.
-Z-
Z
The vertical component value of a point.
last modified 3 May 2007
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