How to conduct pre-shipment safety inspections

Deterioration of exterior wall plaster or cladding primarily involves hollowing, cracking, and peeling. To detect potential peeling issues, a combination of infrared thermal imaging and a hollowing hammer is commonly used.

Infrared thermal imaging principle: Primarily involves the collection and conversion of temperature signals (infrared signals) emitted by the measured object, with the painting mortar and wall tiles' peeling creating a certain air layer. The sealed air layer has a high resistance, thus the thermal conductivity between the exterior wall surface and the main structure is relatively low.

Generally, the temperature at hollow spots is higher than at other locations when there is more sunlight or the temperature rises; conversely, the temperature at hollow spots is lower than at other locations when sunlight decreases or the temperature falls.

Additionally, in cases where sunlight doesn't uniformly illuminate the wall, the unilluminated areas are factors affecting the accuracy of the detection. Such unilluminated walls require the use of traditional tapping hammers for辅助 detection.