Ground penetrating radar and differential GPS time synchronization method and system

Abstract

The invention provides a ground penetrating radar and differential GPS time synchronization method and a system. The method and the system solve the accurate positioning problem of a conventional ground penetrating radar during the large-area, long-distance and continuous data acquisition process in the prior art. According to the invention, a ground penetrating radar and a differential GPS are combined to form an integrated data acquisition system. The same pulse-triggered ground penetrating radar and the GPS are utilized, and the absolute GPS time is adopted as a reference. Meanwhile, in combination with the track pitch of the data acquisition of the ground penetrating radar and the precision of a distance measuring wheel, the data of each track in the image of the ground penetrating radar can be accurately matched with the position information. According to the invention, the defects of a traditional method, such as slow data acquisition efficiency, small range, slow data updating speed for real-time communication data through an existing differential GPS digital serial port, can be overcome. The image positioning precision of the ground penetrating radar is improved fundamentally and the positioning precision thereof can reach the centimeter level. Therefore, the requirement of the general geological exploration is met. The position information during the data acquisition process of the ground penetrating radar can be accurately acquired and the data acquisition step is simplified. The positioning precision and the working efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of geological survey, in particular to a method and system for time synchronization between ground penetrating radar and differential GPS. Background technique [0002] Ground-penetrating radar is a non-destructive geophysical detection technology that uses high-frequency electromagnetic waves to determine the structure of shallow strata. It mainly determines the location of underground targets or layer distributions based on electrical differences (conductivity and dielectric constant) of underground media. , shape, depth and geometry parameters. Because of its advantages of high data acquisition efficiency, high resolution and non-destructive testing, it is widely used in road testing, archaeology, construction engineering and many other fields. [0003] Precise positioning is the key during GPR data acquisition. In the prior art, the artificial single point positioning method is mostly used in the detec...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problem that accurate positioning cannot be performed during the data collection process of ground penetrating radar, the present invention proposes a method and system for time synchronization between ground penetrating radar and differential GPS, which can realize accurate measurement of position information in the process of data collection of ground penetrating radar, and simplify data Acquisition steps, thereby improving positioning accuracy and work efficiency

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