IRREGULARITY MEASURING DEVICE

PROBLEM TO BE SOLVED: To obtain precise measurement result in a short time and with a little labor. SOLUTION: A frame 4 provided with four leg parts 14 is assigned on, for example, a concrete-laid surface 20 together with an acrylic plate 6. A level is assigned on the acrylic plate 6, and the height of four legs 14 are adjusted with a height adjustment mechanism for the leg part 14, to make the acrylic plate 6 level. After this, under the condition where a laser distance measuring device 8 is assigned on the acrylic plate 6, the laser distance measuring device 8 is moved in order so that the laser beam outgoing position comes to the position of each lattice point 16A of a lattice shaft 16 which is displayed on the acrylic plate 6. With the laser distance measuring device 8, a distance from the laser distance measuring device 8 to the concrete-laid surface 20 is measured for each lattice point. The result is sent to a personal computer 10 through an RS232C cable 18, and held in a memory of the personal computer 10.