How to conduct pre-shipment safety inspections

Masonry or facade coating inspection of building exterior primarily involves hollowing, cracking, and peeling. If delamination risks are detected in the exterior walls, a common method is to combine infrared thermal imaging with a hollow hammer.

Infrared Thermal Imaging Principle: Primarily involves the collection and conversion of temperature signals (invisible light signals) emitted by the object being measured, with the painting mortar and wall tiles causing a certain air layer to form. A sealed air layer has a significant blocking ability, thus the thermal conductivity 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 sunlight increases or temperatures rise; conversely, when sunlight decreases or temperatures drop, the temperature at hollowed areas is lower than that of other locations.

Additionally, in cases where sunlight does not uniformly illuminate the wall, the unilluminated areas are factors affecting the accuracy of the detection. Such unilluminated walls require the use of traditional hammering techniques to assist in the inspection.