How to Conduct Early Safety Inspections

The main concerns for exterior wall plaster or coating inspection include hollowing, cracking, and peeling. If delamination risks are found in the exterior wall, a common method for detection is the combination of an infrared thermal imaging camera and a hollowing hammer.

Infrared thermal imaging camera principle: Primarily involves the collection and conversion of temperature signals (infrared light signals) emitted by the measured object. The chalking of masonry and wall tiles creates a certain air layer. A sealed air layer has a high resistance, thus the thermal conductivity of the delamination layer between the exterior wall surface and the main body is relatively low.

Generally, the temperature at hollowed areas is higher than that of other locations when there is more sunlight or the temperature rises; conversely, the temperature at hollowed areas is lower than that of other locations when sunlight decreases or the temperature falls.

Additionally, in cases where sunlight does not uniformly illuminate the wall surface, the areas not exposed to light are factors affecting the accuracy of the detection. Such unilluminated walls require the use of traditional hollow hammer for辅助 detection.