Two laser triangulation sensors are used to precisely measure the thickness of aluminum strips as they pass through the system. The sensors are mounted on opposite sides of the strip and determine thickness through distance measurements, allowing accurate thickness readings regardless of the strip's exact height. Measurements are taken at 2 per second with a resolution of 1/1000 mm and accuracy of 1/100 mm for thicknesses ranging from 10 mm. Areas outside the thickness tolerance are not coated, allowing the strip to be recycled.

1. A078_e
Laser-Triangulation
optoNCDT
Non-contact thickness measurement of aluminium
Prompt detection of incorrect thickness Measurement system requirements
For the prompt detection of incorrect thickness on - Measurement range 10 mm
aluminum strip, patented laser triangulation sensors - Thickness accuracy: 1/100 mm
are employed as a modern alternative solution to - Resolution: 1/1,000 mm
isotope measurement systems. To save costs the - Bandwidth: 2 measurements/s
places on the strip which are outside the permissible - Surface: Aluminum, shiny
thickness tolerance are not provided with a
foodstuffs-compatible coating and so the strip can Measurement system set-up
be recycled without problem in production. At the 2x ILD2000-10 1x DD 600
point of measurement the sensors are mounted 2x SGH 2000.01 1x CU 805
opposite one another, above and below the passing 2x C 2000-3 1x AZ 800.09
aluminum strip. Irrespective of the exact height 1x PS 2000-SM 1x 2-channel - U/I converter
position of the strip, the exact material thickness is 1x SIC 3.05 1x FP 507
obtained by a simple distance signal coupling, 1x RS649.03
F=Ref. - (A + B), of both sensors. Apart from the
absolute thickness value, the thickness tolerance Reasons for the system selection
can be monitored for the zero value via the automatic - Non-contacting and therefore wear-free.
zero setting system. The thickness value is - High accuracy even with shiny measurement
transferred as a current signal to the process control object surfaces.
system. Due to the harsh ambient conditions, the - Large base distance, easy fitting and operation.
sensors are operated in special protective housings - Rugged system version, visible laser, Protection
with conditioned compressed air. Class 2.
Two sensors optoNCDT measure the exact thickness of the shiny aluminium
MICRO-EPSILON A member of micro-epsilon group.
Koenigbacher Str. 15 Tel.: 0 85 42/1 68-0 info@micro-epsilon.com Certified DIN EN ISO 9001 : 2000
94496 Ortenburg / Germany Fax: 0 85 42/1 68 90 www.micro-epsilon.com Modifications reserved Y9781078