How to conduct a pre-shipment safety inspection

Mainly involves checking for hollowed areas, cracks, and peeling on the exterior wall plaster or cladding. To detect potential peeling hazards on the exterior wall, a combination of infrared thermal imaging cameras and a hollow hammer is commonly used.

Infrared Thermal Imaging Principle: Primarily involves the collection and conversion of temperature signals (invisible light signals) emitted by the object being measured, with the application of paint, mortar, and wall tiles causing a certain air layer to form. A sealed air layer has significant blocking capability, thus the thermal conductivity of the delamination layer between the exterior wall surface and the main structure is relatively low.

Generally, when there's more sunlight or the temperature rises, the temperature at the hollowed spots is higher than at other locations; conversely, when sunlight decreases or the temperature drops, the temperature at the hollowed spots is lower than at other locations.

Additionally, in cases where sunlight does not uniformly illuminate the walls, the portions that are not exposed can affect the accuracy of the detection. Such unilluminated walls require the use of traditional tapping hammers for辅助 inspection.