Aviation superconducting full-tensor magnetic gradient data acquisition system and method based on NI cRIO

Abstract

The invention discloses an aviation superconducting full-tensor magnetic gradient data acquisition system and method based on NI cRIO. The system comprises an NI cRIO controller, a C-series I / O module, an SQUID work point adjustment control module and a human-computer interaction interface. A model of the NI cRIO controller is NI 9033 and the controller comprises an NI Real-Time controller and a4-slot FPGA chassis. The C-series I / O module comprises an NI 9202 analog signal acquisition card, an RS232 serial acquisition card, and an NI 9401 digital I / O acquisition card. All three board cardsare plugged into the FPGA chassis of the NI 9033 controller. In the invention, the NI9033 is taken as a real-time controller, and a set of the aviation superconducting full-tensor data acquisition andcontrol system is constructed; the human-computer interaction interface displays collected data in real time, and a 40M crystal oscillator on the FPGA chassis and a PPS signal of GPS are used so thatsynchronization accuracy of SQUID magnetic data, an inertial navigation posture and position data reaches 1000 ns.

Description

technical field [0001] The invention relates to an aeronautical superconducting full tensor magnetic gradient data acquisition and control system and method based on NI cRIO, belonging to the field of aeronautical magnetic survey. Background technique [0002] The magnetic survey work is divided into ground magnetic survey, airborne magnetic survey, marine magnetic survey and borehole magnetic survey according to the different spatial regions where the magnetic anomaly is observed. The present invention belongs to the category of aerial magnetic survey. Aeromagnetic survey refers to the magnetic survey with a magnetometer installed on the aircraft. The aeronautical superconducting full tensor magnetic gradient measurement and control system uses magnetic anomaly information caused by magnetic mineral resources obtained during the flight to realize high-efficiency and high-efficiency monitoring of geological structures and mineral resource distribution laws by carrying magnet...

AI Technical Summary

Problems solved by technology

However, SQUID also has some limitations. First, the working curve of SQUID, the core sensor of the superconducting full tensor magnetic gradiometer, is not linear, so its working parameters need to be readjusted every time it is powered on; It is very sensitive to small signals, so when the external magnetic field interference is large, the SQUID will deviate from the working point or even lose the lock directly, and cannot work normally; again, because the aviation carrying platform is moving, it needs to use high-precision attitude projection for magnetic compensation. Eliminate the interference introduced by the movement of the carrying platform; finally, due to the poor electromagnetic compatibility of the aeronautical superconducting data acquisition and control system, the introduction of radio frequency and eddy current interference causes a lot of noise in the SQUID measurement data

Due to these limitations, the development of aerosuperconducting full tensor magnetic gradient data acquisition and control systems is facing great challenges

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