Nuclear magnetic resonance signal real-time noise offsetting device for multiple near-end reference coils

The invention relates to a nuclear magnetic resonance signal real-time noise offsetting device for multiple near-end reference coils. A main receiving coil and one or more reference receiving coils pass through a multi-channel signal conditioning circuit of a ground nuclear magnetic resonance instrument and are connected with a digital analog converter to be converted into digital values, the digital values are input into a digital signal processing chip, the digital analog converter is connected with a main self-adaptation filter, and reference signal channel digital analog converters are connected with self-adaptation filters respectively. The multiple reference coils can offset the environment noise produced by a plurality of noise sources, the occupied space limit caused by pavement of the coils can be reduced through near-end reference, the application range of the reference coils is widened, the loss of the nuclear magnetic resonance signals collected in the main receiving coil can be avoided through the multiple sets of self-adaptation filters, the signal to noise ratio is improved, the real-time self-adaptation filtering algorithm is achieved through the digital signal processing chip, and data collecting and processing efficiency is improved.