Infrared thermal imager and method for detecting asphalt road construction

Abstract

The invention discloses an infrared thermal imager and a method for detecting asphalt road construction. According to the method for detecting the temperature in the construction, firstly, the start temperature needs to be detected, the relationship between the mixing temperature and the start temperature is determined, the start temperature is prevented from being too high or too low, and secondly, the arrival temperature and distribution of low-temperature surface mixture are detected, 'material covering', too long load distance and skip car coverage caused by too short mixing time are avoided, the influence of period temperature loss on the generated low-temperature surface mixture is determined, the mixture temperature of a distributor is detected, namely, the paving temperature is detected, and reasonable mixing temperature is determined according to the relationship between the start temperature and the arrival temperature and the relationship between the start temperature and the mixing temperature of a mixing plant. Rolling follow-up is detected, an initial pressure area is prevented from being too long or too short, the surface is compacted as soon as possible, the temperature of a road surface at the end of rolling is detected, so that effective compaction time of re-rolling and final rolling is determined, and too low road surface temperature at the end of rolling due to untimely follow-up of re-rolling and too long re-rolling area is avoided.

Description

technical field [0001] The invention relates to the technology in the field of automatic detection, in particular to an infrared camera and a detection method for asphalt road construction detection. Background technique [0002] The temperature of the asphalt mixture is an important aspect that determines the quality of the pavement. It includes specific parameters such as the exit temperature of the asphalt mixture, the arrival temperature, the paving temperature, and the rolling temperature. Asphalt is a temperature-sensitive material, and the performance of asphalt mixture is closely related to temperature. When the temperature of the asphalt mixture is too high, the asphalt film on the surface of the aggregate is easy to age; when the temperature of the asphalt mixture is low, the viscosity of the asphalt increases, which makes it difficult to compact the mixture, and even agglomerates and becomes hard. Rolling and forming, or because the asphalt cannot fully lubricate...

AI Technical Summary

Problems solved by technology

[0005] (1) Randomness: Since mercury thermometers or digital display thermometers can only measure one point at a time, and there is a temperature difference between certain local points, especially some specific points, the temperature is very high or very low, The extreme temperature difference (the difference between the highest temperature and the lowest temperature) is extremely large, which cannot accurately represent the real condition of the paved road

[0006] (2) Delay: Due to the limitation of the temperature measurement principle of point thermometers, especially mercury thermometers, which rely on heat transfer, it takes a certain amount of time for this type of thermometer to rise from the temperature of heat transfer to the temperature stabilization from the beginning of contact.

In addition, due to the limitation of follow-up and timeliness of expressway asphalt pavement mechanized construction, it is impossible to have sufficient time to allow such slow detection

[0007] (3) Contact: Traditional point thermometers mostly rely on heat transfer to achieve temperature measurement, that is, point thermometers are required to be in close contact with asphalt mixture, and testing personnel are required to be in close contact with high-temperature asphalt mixture. It is easy to burn or worry about being pressed by the roller, which poses a safety hazard

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