Control circuit for detecting road surface defects using sound effect and ground penetrating radar and detection device with the control circuit

Abstract

The invention relates to a control circuit for detecting pavement disease by sound effect radar and ground penetrating radar and a detector comprising the control circuit. The sound effect radar and the ground penetrating radar are jointly used for detecting the pavement disease, so that the thickness, the compressive modulus of elasticity and the defect of each structural layer can be accurately confirmed. A sound wave shock excitation device and the ground penetrating radar control signals to be synchronized via the controller, the thickness of the structural layer of each road is accurately measured by virtue of the electromagnetic wave, and the compressive modulus of elasticity of each structural layer is computed by the sound wave propagation velocity difference. The control circuit and the detector are high in automaticity, low in fault efficiency, small in volume and convenient to use. Compared with the conventional pavement structure detector, the detector can realize quantized non-destructive detection on the thickness of the structural layer, the compressive modulus of elasticity, the structural discontinuous invisible disease and the like, and the detecting speed per hour can reach more than 60km / h, therefore, the detector is wide in application prospect.

Description

technical field [0001] The invention relates to the field of traffic highway detection, in particular to a control circuit for detecting road surface defects by using sound effect and ground penetrating radar and a detection device with the control circuit. Background technique [0002] At present, the internal disease detection technology of pavement structure has attracted more and more attention of engineers from all over the world. They all expect to have a fast and non-destructive detection equipment for real-time detection of pavement and to find various diseases inside the pavement. In recent years, Ground Penetrating Radar (GPR) has been widely used in the non-destructive detection of highway defects. The application of GPR to road pavement layer thickness and pavement structural defects began to be studied in the 1990s. When using ground penetrating radar technology for measurement and research, the basic principle is that electromagnetic waves are transmitted from...

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Problems solved by technology

[0003] The application of ground penetrating radar to detect road surface quality has not completely solved the following problems: first, the detection depth and resolution of GPR are mutually restricted, so we have to compromise when designing or selecting antennas; second, the detection of GPR The effect is closely related to the material properties of the pavement structure layer. When the roadbed pavement material has strong dissipation of electromagnetic waves, and the electromagnetic characteristics of the target are not much different from its environment, it will show poor performance, and sometimes it is not applicable at all; The third is that the maps detected by ground penetrating radar are obscure and difficult to understand. Even professionals can only judge that there may be diseases in the lower part of the road based on experience. Fourth, the quantitative detection accuracy of roadbed diseases needs to be further improved. The bottleneck of the application; fifth, ground penetrating radar cannot detect the strength characteristics of each structural layer

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