Pavement defect detection system and method

Abstract

The invention discloses an infrared-imaging-technology-based pavement defect detection system and an infrared-imaging-technology-based pavement defect detection method. The system comprises a detection vehicle, a cradle head, an infrared thermal imager, a main controller and a data processor, wherein the detection vehicle runs on a detected pavement; the cradle head is arranged on the detection vehicle and used for shooting an infrared thermal image of the detected pavement and outputting infrared thermal image digital signals related with the infrared thermal image; the main controller is arranged on the detection vehicle, connected with the cradle head and the infrared thermal imager respectively and used for controlling the shooting action of the infrared thermal imager, controlling the horizontal rotating angle and the vertical rotating angle of the cradle head and converting the infrared thermal image digital signals into infrared digital signals for standard network transmission; and the data processor is used for receiving the infrared digital signals and analyzing and processing the infrared digital signals to determine the defect type of the detected pavement and the positioning position of a defect. The system has high operation flexibility and can intuitively display the defect details.

Description

technical field [0001] The invention relates to a detection technology for pavement defects and pavement conditions, in particular to a system and method for monitoring the construction quality of pavements such as asphalt expressways. Background technique [0002] At present, when monitoring the pavement defects of asphalt pavements or other pavements such as highways at home and abroad, the "artificial visual inspection method" or "the evaluation of the water permeability of the pavement based on the infrared thermal difference and the supporting maintenance technology" are often used to monitor the pavement defects. Rapid detection and evaluation. [0003] The core instrument used in "Pavement Water Permeability Assessment and Supporting Maintenance Technology Based on Infrared Thermal Difference" is an infrared thermometer (or infrared spot thermometer). Its pavement defect detection system fixes several infrared thermometers side by side on Detect the rear of the vehic...

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Problems solved by technology

[0008] Since the core detection equipment of this system uses an infrared thermometer, its working principle determines that it can only measure temperature but not image, so it cannot directly reflect the thermal distribution image of the measured object; and because the infrared thermometer detects The infrared digital signal is the average temperature of an area (measured area) that is proportional to the temperature measurement distance, so there is a certain error in the accuracy of the temperature measurement result; moreover, since the temperature value measured by the infrared thermometer is point data (At most, it is only a small area of ​​infrared digital signal, based on the accuracy of road surface detection, this area should not be too large) type, so the detection area of ​​a single infrared thermometer is very limited, even if more than one detection vehicle is installed An infrared thermometer can only monitor one lane at a time, so it must be time-consuming and laborious to realize a comprehensive detection of multi-lane road surfaces. For example, the specification of the above-mentioned patent application is attached to it. figure 1 According to the description: "Map area: the thermal difference map formed according to the temperature difference, reddish indicates high temperature area, blue indicates low temperature area, and detects one lane at a time", it can be seen that it can only realize the detection of single lanes

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