Shallow-earth-surface frequency domain electromagnetic detecting receiving system and data processing method

Abstract

The invention relates to a shallow-earth-surface frequency domain electromagnetic detecting receiving system and a data processing method. The shallow-earth-surface frequency domain electromagnetic detecting receiving system is characterized in that a five-channel analog circuit is connected with an upper computer through an FPGA and a DSP; the FPGA is connected with a transmitting bridge circuit and an extended control interface; and the DSP is connected with the extended control interface. The shallow-earth-surface frequency domain electromagnetic detecting receiving system has advantages of simple circuit and relatively small size. An FPGA+DSP architecture is firstly utilized in a shallow-earth-surface frequency domain electromagnetic detecting receiving system field. Compared with the FPGA+(single-chip-microcomputer) architecture of broadband electromagnetic detecting equipment of Jilin University, the FPGA+DSP architecture has an advantage of greatly improving data transmission rate. The data processing equipment is changed from the upper computer to the DSP, thereby settling defects of occupation of large amount of CPU resource and low efficiency in real-time data processing by the upper computer. A high-efficiency data processing algorithm is presented, thereby realizing simple operation, high effectiveness and high operability. The shallow-earth-surface frequency domain electromagnetic detecting receiving system and the data processing method further have advantages of realizing high convenience of the data processing method, reducing processing time and improving operation efficiency. The shallow-earth-surface frequency domain electromagnetic detecting receiving system and the data processing method can be used for shallow-earth-surface electromagnetic detection on metal abnormal members within certain thicknesses.

Description

technical field [0001] The invention relates to an electromagnetic detection receiving device and a data processing method in geophysical detection, in particular to a shallow surface frequency domain electromagnetic detection receiving system and a data processing method. Background technique [0002] In urban construction, important pipelines and cables are often erected on the shallow surface, and there are unexploded ordnance and dangerous metals in the military, so it is particularly important to grasp and evaluate the shallow surface structure. Shallow surface electromagnetic detection is an important method to solve urban construction, engineering geological survey, and military detection, which often cause accidental damage and potential safety hazards. It is convenient, efficient and safe. It is mainly divided into three detection methods: ground penetrating radar, time domain electromagnetic method, and frequency domain electromagnetic method. Ground-penetrating r...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a shallow surface frequency domain electromagnetic detection receiving system and a data processing method for the problems of slow data transmission speed in the above-mentioned prior art, the real-time processing of data by the host computer takes up a lot of CPU resources, and the efficiency is not high.

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