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FPGA-based multichannel airborne magnetometry data acquisition system

A data acquisition system and magnetometric measurement technology, applied in radio wave measurement system, measurement device, geophysical measurement and other directions, can solve the problem of increasing equipment complexity and equipment cost, and it is difficult to take into account the accuracy of magnetic field value and data update rate, and equipment data synchronization. It is difficult to guarantee and other problems to achieve the effect of improving accuracy

Inactive Publication Date: 2016-08-03
SHANGHAI MARITIME UNIVERSITY
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Problems solved by technology

[0004] Because the system involves multiple optical pump magnetometers, if a general MCU is used to collect and calculate the optical pump Larmor signal, the operation of each module is executed serially, and it is difficult to take into account the accuracy of the obtained magnetic field value and the data update rate. Therefore, the general multi-channel aeromagnetic measurement equipment is integrated with multiple optical pump magnetometers, which greatly increases the complexity and equipment cost of the entire equipment, and it is difficult to guarantee the data synchronization between the equipment.

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[0031] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] like figure 1 As shown, the first embodiment of the present invention provides a multi-channel airborne magnetic measurement data acquisition system, including a main control module, a first-in-first-out buffer module, an optical pump data acquisition module, a three-axis fluxgate data acquisition module, GPS positioning data acquisition module, GPS satellite positioning module, several optical pump magnetometers, several three-axis fluxgate sensors; the input port of the optical pump data acquisition module is connected to the optical pump magnetometer, and the output port is connected to the first-in-first-out buffer The input port of the three-axis fluxgate data acquisition module is connected with the three-axis fluxgate sensor, and the o...

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Abstract

The invention provides an FPGA-based multichannel airborne magnetometry data acquisition system, which is characterized by comprising a main control chip, optical pump magnetometers, three-axis magnetic flux gate sensors and a GPS satellite positioning module, wherein the main control chip adopts software to design an optical pump data acquisition module, a three-axis magnetic flux gate data acquisition module and a GPS positioning data acquisition module, and the three modules can parallelly acquire corresponding data. Magnetic field data of multiple optical pumps, the three-axis magnetic flux gate data and the GPS positioning data can be acquired in real time, storage and recording of all data can be realized, full-tensor airborne magnetometry can be realized, the change rate information of a geomagnetic vector in three-dimensional space is deeply analyzed, the integration is high, the magnetic field measurement precision is high, and strong supports are provided for geological structure research and mineral resource exploration.

Description

technical field [0001] The invention relates to the technical field of airborne magnetic measurement, in particular to an airborne magnetic measurement data acquisition system. Background technique [0002] Aeromagnetic surveying (abbreviated as aeromagnetic surveying) is a geophysical method that loads the aerial magnetometer and its supporting auxiliary equipment on the aircraft, and measures the strength or gradient of the geomagnetic field over the measurement area according to the preset survey line and altitude. . Compared with ground magnetic survey, aeromagnetic survey has higher measurement efficiency and is not limited by waters, forests, swamps, deserts and mountains. At the same time, because the flight is carried out at a certain height from the earth's surface, the influence of the magnetic inhomogeneity on the earth's surface is weakened, and the magnetic field characteristics of deep geological bodies can be reflected more clearly. [0003] In recent years,...

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Application Information

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IPC IPC(8): G01V3/40
CPCG01V3/40
Inventor 胡杰张琳
Owner SHANGHAI MARITIME UNIVERSITY