july 19, 2007 internal presentation georg gassner [email protected] 1 long wire measurement...
TRANSCRIPT
1July 19, 2007Internal Presentation
Georg [email protected]@slac.stanford.edu
Long Wire Measurement System Georg Gassner, SLAC
July, 2007
Long Wire Measurement System Georg Gassner, SLAC
July, 2007
Introduction Principle Long Wire
Introduction Principle Long Wire
2July 19, 2007Internal Presentation
Georg [email protected]@slac.stanford.edu
Long Wire Measurement System
PurposeConnecting different parts of a network together (in x - direction)
PurposeConnecting different parts of a network together (in x - direction)
3July 19, 2007Internal Presentation
Georg [email protected]@slac.stanford.edu
Long Wire Measurement System
PrinciplePositioning of a platform relative to a wire at different locations
Connecting the network with the wire -> Laser tracker
RealizationPositioning capabilities
x- y translation -> one laser position in x and y each
Pitch, roll and yaw -> second laser position in x and y each plus bubble level for roll
PrinciplePositioning of a platform relative to a wire at different locations
Connecting the network with the wire -> Laser tracker
RealizationPositioning capabilities
x- y translation -> one laser position in x and y each
Pitch, roll and yaw -> second laser position in x and y each plus bubble level for roll
4July 19, 2007Internal Presentation
Georg [email protected]@slac.stanford.edu
Scan of Wire Along the X- Axis
Scan of a 0.4mm diameter green monofilament wire (blackened)
Problem found here: ambient light influences reading-> measurements on
Both sides of the wire
Scan of a 0.4mm diameter green monofilament wire (blackened)
Problem found here: ambient light influences reading-> measurements on
Both sides of the wire
5July 19, 2007Internal Presentation
Georg [email protected]@slac.stanford.edu
Scan of Wire Along the X- Axis
Scan of a 0.8 mm fishing line (pink)Scan of a 0.8 mm fishing line (pink)
6July 19, 2007Internal Presentation
Georg [email protected]@slac.stanford.edu
Long Wire
Problem with long wire is the exposure of the wire to airflow, this results in vibration of the wire
(Experiment in the gallery with a 250m wire resulted in vibrations with an amplitude of > 100 micrometers)
-> Solution is to surround the wire with plastic sheets
Problem with long wire is the exposure of the wire to airflow, this results in vibration of the wire
(Experiment in the gallery with a 250m wire resulted in vibrations with an amplitude of > 100 micrometers)
-> Solution is to surround the wire with plastic sheets
7July 19, 2007Internal Presentation
Georg [email protected]@slac.stanford.edu
Kink in the wire (1)
To determine the existence of kinks in the wire two parallel wires were stretched over a distance of 80 m
To determine the existence of kinks in the wire two parallel wires were stretched over a distance of 80 m
8July 19, 2007Internal Presentation
Georg [email protected]@slac.stanford.edu
Kink in the wire (2)
To determine the existence of kinks in the wire two parallel wires were stretched over a distance of 80 m. In the ideal case this would result in a straight line.
To determine the existence of kinks in the wire two parallel wires were stretched over a distance of 80 m. In the ideal case this would result in a straight line.
9July 19, 2007Internal Presentation
Georg [email protected]@slac.stanford.edu
Electro static charge
No measurable deflection of the wire by charging the plastic cover
Charged Plexiglas rod, 20 mm from line-> 20 micrometers
Effect of plastic sheets expected to be 25-100 times smaller
Precaution steps:
Increasing the humidity
-> spraying water on
plastic
No measurable deflection of the wire by charging the plastic cover
Charged Plexiglas rod, 20 mm from line-> 20 micrometers
Effect of plastic sheets expected to be 25-100 times smaller
Precaution steps:
Increasing the humidity
-> spraying water on
plastic
