With the CMD (Crack Monitoring Device), a three-point rosette, in the shape of an equilateral triangle with 50-mm side lengths, is bonded to the surface. Two of the rosette points are positioned parallel to the crack, and the third one is positioned on the opposite side of the crack approximately half the distance to the base line.
Temperature and moisture related movements, measured between points A and B, together with crack movement measurements between points A and C as well as between points B and C are transformed mathematically into the opening or closing of the crack and into the relative lateral movement of the two sides of the crack.
Hylec Controls | Test Equipment Suppliers and Integrators
Hylec Control was first established in 1979 and initially started operation as a developer and manufacturer of analogue control systems. These were specially customised hydraulic applications, using ...