SQUID (Superconducting Quantum Interference Device) full-tensor measuring module, magnetocardiogram signal detecting device and method

Abstract

The invention provides an SQUID (Superconducting Quantum Interference Device) full-tensor measuring module, a magnetocardiogram signal detecting device and a magnetocardiogram signal detecting method. The method comprises the following steps: placing the heart of a detected object right below the SQUID full-tensor measuring module, wherein the SQUID full-tensor measuring module comprises a full-tensor gradiometer and a three-axis magnetometer; acquiring a magnetocardiogram signal, and obtaining a magnetometer signal and a gradiometer signal at the same time; obtaining a full-tensor gradient signal of the magnetocardiogram signal according to the gradiometer signal; obtaining a characteristic value and a rotation invariant according to the full-tensor gradient signal of the magnetocardiogram signal, and analyzing the characteristic value and the rotation invariant. The full-tensor magnetic gradiometer can be formed by a plurality of non-coplanar SQUID plane gradiometers, and the first-order gradient information of a space magnetic field is detected; meanwhile, the three-dimensional information of the magnetic field is also detected by using the SQUID three-axis magnetometer. The SQUID full-tensor measuring module, the magnetocardiogram signal detecting device and the magnetocardiogram signal detecting method are applied to detection of the magnetocardiogram signal, the vector information and the full-tensor first-order gradient information of the magnetocardiogram signal can be obtained at the same time, and richer magnetocardiogram signal information is obtained.

Description

technical field [0001] The invention relates to the field of biomagnetic detection, in particular to a SQUID full tensor measurement module, a device and a method for detecting a cardiomagnetic signal. Background technique [0002] The magnetic sensor based on the superconducting quantum interference device (Superconducting Quantum Interference Device, hereinafter referred to as SQUID) is the most sensitive magnetic sensor known at present, and the sensitivity of the low-temperature superconducting SQUID is better than 10 feta, and the sensitivity of the high-temperature superconducting SQUID is better than 100 feta. SQUID magnetic sensor is an important high-end application sensor, which is widely used in biomagnetism, geophysical detection, extremely low-field nuclear magnetic resonance and other weak magnetic field detection fields, and has high scientific research and application value. [0003] The magnetic field is a vector field, which contains rich information such a...

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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a SQUID full tensor measurement module, a magnetic signal detection device and method, which are used to solve the problem that the amount of information of the magnetic signal in the prior art is relatively small and cannot be comprehensively Evaluate heart function and diagnose problems such as heart disease

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