DEVELOPMENTAL STUDY ON REMOTE-SENSING DIAGBOSIS METHOD ON DETRIORATION BEHAVIOR IN CIVIL STRUCTURES

为了检测土木工程结构中混凝土、瓦、砖、盖板等构件的劣化部位，采用红外辐射计进行了一种新的辐射热检测方法。在本研究中，利用太阳光、灯、热气体、间接辐射燃烧等内外部因素，将多种入射热能入射到被测元件的表面。在红外辐射计的阴极射线管上显示了裂纹上方的瞬态辐射表面温度。我们制作了一个高温辐射加热器，它向带有多个缺陷的结构元件表面辐射20千瓦的热量。试样由辐射加热器间接加热。用红外辐射计观测到了裂纹上方的异常温度分布。利用辐射加热器成功地探测了埋深为30cm的地下工程，作为应用研究，该方法成功地应用于古民居、基坑、混凝土结构裂缝、脱空的探测。

In order to detect the location of deteriorated elements of the civil engineering stucture like concrete, tile, brick and covered plate, a new radiation thermal test using an infrared radiomenter was undertaken. In this study, several incedent heat energy was inected to the surface of the tested element with external abd internal dlaws such as sun, lamp, hot gas, indirect radiation combustion. The transient radiation surface temperature above the flaws was displayd on the CRT of the infrared radiometer. A observed image of the radiation temperature image above the flaw shows the existance of the flaw.We manufactured a high temperature radiation heater which radiates the heat of 20 kw to the surface of the structural element with several flaws. The test piece was indirectly heated by the radiation heater. The abnormal temperature distribution above the flaw was observed by the infrared radiometer. It was succeeded to detect the underground buried project of 30 cm in depth embedded in the earth using the radiation heater.As the application study, the method was successfully applied to detect the ancient house, dwelling pit, crack and seperation of the concrete structure.