Applications example - coupling alignment monitoring
In order to determine misalignment of coupled machines resulting from thermal growth, sinking foundations, etc. the user fastens a PERMALIGN® monitor to one machine and the reflector onto the other; the magnitude and direction of any motion of one machine with respect to the other will then be reported by the system based upon the operating principle described earlier.
One sensor system may be used to observe two parameters simultaneously: each 90° roof prism allows detection of a relative parallel displacement of up to + 8 mm (+ 5/16 in.) and relative displacement of up to + 8 mm (+ 5/16 in.) resulting from angular rotation about the same axis.
Generally, two systems are used in conjunction for close observation of all four alignment parameters (degrees of freedom) which describe the alignment condition of
Additional monitors may be used for absolute measurements as opposed to relative movements between machines e.g. by measuring between the machine and a solid foundation.
Of course, using of the PERMALIGN® system is by no means limited only to monitoring the positions of shaft-coupled machinery. As a generally applicable measurement system, the PERMALIGN® allows simple yet precise monitoring of an extremely wide variety of structures, such as those encountered in steel mills, machine tool fabrication, or building construction.