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据香港《建筑承造》杂志报导,英国生产了一种名为“IDD”的仪器,能探测混凝土结构内裂的位置。据悉最深可量度离表面半米处,并可探出损坏程度。当要探测大面积如道路面时,可利用一个量度轮快速地探测。系利用一种晶体在被敲击后所发出的电波讯号来量度裂缝。如液晶体显示的读数偏低,则结构完整;如读数偏高,则表示有裂缝或空隙。
According to Hong Kong’s “Building for Construction” magazine, the United Kingdom produced an instrument called “IDD” that can detect the location of cracks in concrete structures. It is reported that the deepest point can be measured half a meter away from the surface and the degree of damage can be detected. When a large area such as a road surface is to be detected, a measuring wheel can be used for rapid detection. The cracks are measured by the crystal signal emitted by a crystal after being struck. If the reading on the liquid crystal display is low, the structure is complete; if the reading is high, it indicates cracks or voids.