A pressure portion includes a receiver for adjustable lateral support of a rack for a steering arrangement of vehicles. The detecting device includes a light transmission sensor and a light reflection sensor. A snoop-based cache coherency protocol is employed to ensure data accessed by each processing unit is up-to-date, and when an access request is issued the cache coherency protocol is referenced in order to determine whether a snoop process is required. A computer running user interface software may be connected to the system to facilitate programming. Also facilitated is the detection of aerodynamic flow separation with a concurrent detection of encountered mechanical strain and stresses on the surface structure being monitored. This allows the body to be used as an optical resonator for producing a resonance of light between the two point defects or optical reflector for reflecting light at the two point defects.